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CMAKE-FILE-API(7) CMake CMAKE-FILE-API(7) NAME cmake-file-api - CMake File-Based API INTRODUCTION CMake provides a file-based API that clients may use to get semantic information about the buildsystems CMake generates. Clients may use the API by writing query files to a specific location in a build tree to request zero or more Object Kinds. When CMake generates the buildsystem in that build tree it will read the query files and write reply files for the client to read. The file-based API uses a <build>/.cmake/api/ directory at the top of a build tree. The API is versioned to support changes to the layout of files within the API directory. API file layout versioning is orthogo- nal to the versioning of Object Kinds used in replies. This version of CMake supports only one API version, API v1. New in version 3.27: Projects may also submit queries for the current run using the cmake_file_api() command. API V1 API v1 is housed in the <build>/.cmake/api/v1/ directory. It has the following subdirectories: query/ Holds query files written by clients. These may be v1 Shared Stateless Query Files, v1 Client Stateless Query Files, or v1 Client Stateful Query Files. reply/ Holds reply files written by CMake whenever it runs to generate a build system. These are indexed by a v1 Reply Index File file that may reference additional v1 Reply Files. CMake owns all reply files. Clients must never remove them. Clients may look for and read a reply index file at any time. Clients may optionally create the reply/ directory at any time and monitor it for the appearance of a new reply index file. New in version 3.31: Users can add query files to api/v1/query inside the CMAKE_CONFIG_DIR to create user-wide queries for all CMake projects. v1 Shared Stateless Query Files Shared stateless query files allow clients to share requests for major versions of the Object Kinds and get all requested versions recognized by the CMake that runs. Clients may create shared requests by creating empty files in the v1/query/ directory. The form is: <build>/.cmake/api/v1/query/<kind>-v<major> where <kind> is one of the Object Kinds, -v is literal, and <major> is the major version number. Files of this form are stateless shared queries not owned by any spe- cific client. Once created they should not be removed without external client coordination or human intervention. v1 Client Stateless Query Files Client stateless query files allow clients to create owned requests for major versions of the Object Kinds and get all requested versions rec- ognized by the CMake that runs. Clients may create owned requests by creating empty files in client-specific query subdirectories. The form is: <build>/.cmake/api/v1/query/client-<client>/<kind>-v<major> where client- is literal, <client> is a string uniquely identifying the client, <kind> is one of the Object Kinds, -v is literal, and <major> is the major version number. Each client must choose a unique <client> identifier via its own means. Files of this form are stateless queries owned by the client <client>. The owning client may remove them at any time. v1 Client Stateful Query Files Stateful query files allow clients to request a list of versions of each of the Object Kinds and get only the most recent version recog- nized by the CMake that runs. Clients may create owned stateful queries by creating query.json files in client-specific query subdirectories. The form is: <build>/.cmake/api/v1/query/client-<client>/query.json where client- is literal, <client> is a string uniquely identifying the client, and query.json is literal. Each client must choose a unique <client> identifier via its own means. query.json files are stateful queries owned by the client <client>. The owning client may update or remove them at any time. When a given client installation is updated it may then update the stateful query it writes to build trees to request newer object versions. This can be used to avoid asking CMake to generate multiple object versions unnec- essarily. A query.json file must contain a JSON object: { "requests": [ { "kind": "<kind>" , "version": 1 }, { "kind": "<kind>" , "version": { "major": 1, "minor": 2 } }, { "kind": "<kind>" , "version": [2, 1] }, { "kind": "<kind>" , "version": [2, { "major": 1, "minor": 2 }] }, { "kind": "<kind>" , "version": 1, "client": {} }, { "kind": "..." } ], "client": {} } The members are: requests A JSON array containing zero or more requests. Each request is a JSON object with members: kind Specifies one of the Object Kinds to be included in the reply. version Indicates the version(s) of the object kind that the client understands. Versions have major and minor compo- nents following semantic version conventions. The value must be • a JSON integer specifying a (non-negative) major ver- sion number, or • a JSON object containing major and (optionally) minor members specifying non-negative integer version compo- nents, or • a JSON array whose elements are each one of the above. client Optional member reserved for use by the client. This value is preserved in the reply written for the client in the v1 Reply Index File but is otherwise ignored. Clients may use this to pass custom information with a request through to its reply. For each requested object kind CMake will choose the first ver- sion that it recognizes for that kind among those listed in the request. The response will use the selected major version with the highest minor version known to the running CMake for that major version. Therefore clients should list all supported ma- jor versions in preferred order along with the minimal minor version required for each major version. client Optional member reserved for use by the client. This value is preserved in the reply written for the client in the v1 Reply Index File but is otherwise ignored. Clients may use this to pass custom information with a query through to its reply. Other query.json top-level members are reserved for future use. If present they are ignored for forward compatibility. v1 Reply Index File CMake writes an index-*.json file to the v1/reply/ directory whenever it runs to generate a build system. Clients must read the reply index file first and may read other v1 Reply Files only by following refer- ences. The form of the reply index file name is: <build>/.cmake/api/v1/reply/index-<unspecified>.json where index- is literal and <unspecified> is an unspecified name se- lected by CMake. Whenever a new index file is generated it is given a new name and any old one is deleted. During the short time between these steps there may be multiple index files present; the one with the largest name in lexicographic order is the current index file. The reply index file contains a JSON object: { "cmake": { "version": { "major": 3, "minor": 14, "patch": 0, "suffix": "", "string": "3.14.0", "isDirty": false }, "paths": { "cmake": "/prefix/bin/cmake", "ctest": "/prefix/bin/ctest", "cpack": "/prefix/bin/cpack", "root": "/prefix/share/cmake-3.14" }, "generator": { "multiConfig": false, "name": "Unix Makefiles" } }, "objects": [ { "kind": "<kind>", "version": { "major": 1, "minor": 0 }, "jsonFile": "<file>" }, { "...": "..." } ], "reply": { "<kind>-v<major>": { "kind": "<kind>", "version": { "major": 1, "minor": 0 }, "jsonFile": "<file>" }, "<unknown>": { "error": "unknown query file" }, "...": {}, "client-<client>": { "<kind>-v<major>": { "kind": "<kind>", "version": { "major": 1, "minor": 0 }, "jsonFile": "<file>" }, "<unknown>": { "error": "unknown query file" }, "...": {}, "query.json": { "requests": [ {}, {}, {} ], "responses": [ { "kind": "<kind>", "version": { "major": 1, "minor": 0 }, "jsonFile": "<file>" }, { "error": "unknown query file" }, { "...": {} } ], "client": {} } } } } The members are: cmake A JSON object containing information about the instance of CMake that generated the reply. It contains members: version A JSON object specifying the version of CMake with mem- bers: major, minor, patch Integer values specifying the major, minor, and patch version components. suffix A string specifying the version suffix, if any, e.g. g0abc3. string A string specifying the full version in the format <major>.<minor>.<patch>[-<suffix>]. isDirty A boolean indicating whether the version was built from a version controlled source tree with local modifications. paths A JSON object specifying paths to things that come with CMake. It has members for cmake, ctest, and cpack whose values are JSON strings specifying the absolute path to each tool, represented with forward slashes. It also has a root member for the absolute path to the directory con- taining CMake resources like the Modules/ directory (see CMAKE_ROOT). generator A JSON object describing the CMake generator used for the build. It has members: multiConfig A boolean specifying whether the generator sup- ports multiple output configurations. name A string specifying the name of the generator. platform If the generator supports CMAKE_GENERATOR_PLATFORM, this is a string speci- fying the generator platform name. objects A JSON array listing all versions of all Object Kinds generated as part of the reply. Each array entry is a v1 Reply File Ref- erence. reply A JSON object mirroring the content of the query/ directory that CMake loaded to produce the reply. The members are of the form <kind>-v<major> A member of this form appears for each of the v1 Shared Stateless Query Files that CMake recognized as a request for object kind <kind> with major version <major>. The value is a v1 Reply File Reference to the corresponding reply file for that object kind and version. <unknown> A member of this form appears for each of the v1 Shared Stateless Query Files that CMake did not recognize. The value is a JSON object with a single error member con- taining a string with an error message indicating that the query file is unknown. client-<client> A member of this form appears for each client-owned di- rectory holding v1 Client Stateless Query Files. The value is a JSON object mirroring the content of the query/client-<client>/ directory. The members are of the form: <kind>-v<major> A member of this form appears for each of the v1 Client Stateless Query Files that CMake recognized as a request for object kind <kind> with major version <major>. The value is a v1 Reply File Reference to the corresponding reply file for that object kind and version. <unknown> A member of this form appears for each of the v1 Client Stateless Query Files that CMake did not recognize. The value is a JSON object with a sin- gle error member containing a string with an error message indicating that the query file is unknown. query.json This member appears for clients using v1 Client Stateful Query Files. If the query.json file failed to read or parse as a JSON object, this member is a JSON object with a single error member containing a string with an error message. Other- wise, this member is a JSON object mirroring the content of the query.json file. The members are: client A copy of the query.json file client mem- ber, if it exists. requests A copy of the query.json file requests mem- ber, if it exists. responses If the query.json file requests member is missing or invalid, this member is a JSON object with a single error member contain- ing a string with an error message. Other- wise, this member contains a JSON array with a response for each entry of the re- quests array, in the same order. Each re- sponse is • a JSON object with a single error member containing a string with an error mes- sage, or • a v1 Reply File Reference to the corre- sponding reply file for the requested ob- ject kind and selected version. After reading the reply index file, clients may read the other v1 Reply Files it references. v1 Reply File Reference The reply index file represents each reference to another reply file using a JSON object with members: kind A string specifying one of the Object Kinds. version A JSON object with members major and minor specifying integer version components of the object kind. jsonFile A JSON string specifying a path relative to the reply index file to another JSON file containing the object. v1 Reply Files Reply files containing specific Object Kinds are written by CMake. The names of these files are unspecified and must not be interpreted by clients. Clients must first read the v1 Reply Index File and follow references to the names of the desired response objects. Reply files (including the index file) will never be replaced by files of the same name but different content. This allows a client to read the files concurrently with a running CMake that may generate a new re- ply. However, after generating a new reply CMake will attempt to re- move reply files from previous runs that it did not just write. If a client attempts to read a reply file referenced by the index but finds the file missing, that means a concurrent CMake has generated a new re- ply. The client may simply start again by reading the new reply index file. OBJECT KINDS The CMake file-based API reports semantic information about the build system using the following kinds of JSON objects. Each kind of object is versioned independently using semantic versioning with major and mi- nor components. Every kind of object has the form: { "kind": "<kind>", "version": { "major": 1, "minor": 0 }, "...": {} } The kind member is a string specifying the object kind name. The ver- sion member is a JSON object with major and minor members specifying integer components of the object kind's version. Additional top-level members are specific to each object kind. Object Kind "codemodel" The codemodel object kind describes the build system structure as mod- eled by CMake. There is only one codemodel object major version, version 2. Version 1 does not exist to avoid confusion with that from cmake-server(7) mode. "codemodel" version 2 codemodel object version 2 is a JSON object: { "kind": "codemodel", "version": { "major": 2, "minor": 7 }, "paths": { "source": "/path/to/top-level-source-dir", "build": "/path/to/top-level-build-dir" }, "configurations": [ { "name": "Debug", "directories": [ { "source": ".", "build": ".", "childIndexes": [ 1 ], "projectIndex": 0, "targetIndexes": [ 0 ], "hasInstallRule": true, "minimumCMakeVersion": { "string": "3.14" }, "jsonFile": "<file>" }, { "source": "sub", "build": "sub", "parentIndex": 0, "projectIndex": 0, "targetIndexes": [ 1 ], "minimumCMakeVersion": { "string": "3.14" }, "jsonFile": "<file>" } ], "projects": [ { "name": "MyProject", "directoryIndexes": [ 0, 1 ], "targetIndexes": [ 0, 1 ] } ], "targets": [ { "name": "MyExecutable", "directoryIndex": 0, "projectIndex": 0, "jsonFile": "<file>" }, { "name": "MyLibrary", "directoryIndex": 1, "projectIndex": 0, "jsonFile": "<file>" } ] } ] } The members specific to codemodel objects are: paths A JSON object containing members: source A string specifying the absolute path to the top-level source directory, represented with forward slashes. build A string specifying the absolute path to the top-level build directory, represented with forward slashes. configurations A JSON array of entries corresponding to available build config- urations. On single-configuration generators there is one entry for the value of the CMAKE_BUILD_TYPE variable. For multi-con- figuration generators there is an entry for each configuration listed in the CMAKE_CONFIGURATION_TYPES variable. Each entry is a JSON object containing members: name A string specifying the name of the configuration, e.g. Debug. directories A JSON array of entries each corresponding to a build system directory whose source directory contains a CMake- Lists.txt file. The first entry corresponds to the top-level directory. Each entry is a JSON object con- taining members: source A string specifying the path to the source direc- tory, represented with forward slashes. If the directory is inside the top-level source directory then the path is specified relative to that direc- tory (with . for the top-level source directory itself). Otherwise the path is absolute. build A string specifying the path to the build direc- tory, represented with forward slashes. If the directory is inside the top-level build directory then the path is specified relative to that direc- tory (with . for the top-level build directory it- self). Otherwise the path is absolute. parentIndex Optional member that is present when the directory is not top-level. The value is an unsigned inte- ger 0-based index of another entry in the main di- rectories array that corresponds to the parent di- rectory that added this directory as a subdirec- tory. childIndexes Optional member that is present when the directory has subdirectories. The value is a JSON array of entries corresponding to child directories created by the add_subdirectory() or subdirs() command. Each entry is an unsigned integer 0-based index of another entry in the main directories array. projectIndex An unsigned integer 0-based index into the main projects array indicating the build system project to which the this directory belongs. targetIndexes Optional member that is present when the directory itself has targets, excluding those belonging to subdirectories. The value is a JSON array of en- tries corresponding to the targets. Each entry is an unsigned integer 0-based index into the main targets array. minimumCMakeVersion Optional member present when a minimum required version of CMake is known for the directory. This is the <min> version given to the most local call to the cmake_minimum_required(VERSION) command in the directory itself or one of its ancestors. The value is a JSON object with one member: string A string specifying the minimum required version in the format: <major>.<minor>[.<patch>[.<tweak>]][<suffix>] Each component is an unsigned integer and the suffix may be an arbitrary string. hasInstallRule Optional member that is present with boolean value true when the directory or one of its subdirecto- ries contains any install() rules, i.e. whether a make install or equivalent rule is available. jsonFile A JSON string specifying a path relative to the codemodel file to another JSON file containing a "codemodel" version 2 "directory" object. This field was added in codemodel version 2.3. projects A JSON array of entries corresponding to the top-level project and sub-projects defined in the build system. Each (sub-)project corresponds to a source directory whose CMakeLists.txt file calls the project() command with a project name different from its parent directory. The first entry corresponds to the top-level project. Each entry is a JSON object containing members: name A string specifying the name given to the project() command. parentIndex Optional member that is present when the project is not top-level. The value is an unsigned inte- ger 0-based index of another entry in the main projects array that corresponds to the parent project that added this project as a sub-project. childIndexes Optional member that is present when the project has sub-projects. The value is a JSON array of entries corresponding to the sub-projects. Each entry is an unsigned integer 0-based index of an- other entry in the main projects array. directoryIndexes A JSON array of entries corresponding to build system directories that are part of the project. The first entry corresponds to the top-level di- rectory of the project. Each entry is an unsigned integer 0-based index into the main directories array. targetIndexes Optional member that is present when the project itself has targets, excluding those belonging to sub-projects. The value is a JSON array of en- tries corresponding to the targets. Each entry is an unsigned integer 0-based index into the main targets array. targets A JSON array of entries corresponding to the build system targets. Such targets are created by calls to add_executable(), add_library(), and add_custom_target(), excluding imported targets and interface libraries (which do not generate any build rules). Each entry is a JSON object containing members: name A string specifying the target name. id A string uniquely identifying the target. This matches the id field in the file referenced by jsonFile. directoryIndex An unsigned integer 0-based index into the main directories array indicating the build system di- rectory in which the target is defined. projectIndex An unsigned integer 0-based index into the main projects array indicating the build system project in which the target is defined. jsonFile A JSON string specifying a path relative to the codemodel file to another JSON file containing a "codemodel" version 2 "target" object. "codemodel" version 2 "directory" object A codemodel "directory" object is referenced by a "codemodel" version 2 object's directories array. Each "directory" object is a JSON object with members: paths A JSON object containing members: source A string specifying the path to the source directory, represented with forward slashes. If the directory is inside the top-level source directory then the path is specified relative to that directory (with . for the top-level source directory itself). Otherwise the path is absolute. build A string specifying the path to the build directory, rep- resented with forward slashes. If the directory is in- side the top-level build directory then the path is spec- ified relative to that directory (with . for the top-level build directory itself). Otherwise the path is absolute. installers A JSON array of entries corresponding to install() rules. Each entry is a JSON object containing members: component A string specifying the component selected by the corre- sponding install() command invocation. destination Optional member that is present for specific type values below. The value is a string specifying the install des- tination path. The path may be absolute or relative to the install prefix. paths Optional member that is present for specific type values below. The value is a JSON array of entries correspond- ing to the paths (files or directories) to be installed. Each entry is one of: • A string specifying the path from which a file or di- rectory is to be installed. The portion of the path not preceded by a / also specifies the path (name) to which the file or directory is to be installed under the destination. • A JSON object with members: from A string specifying the path from which a file or directory is to be installed. to A string specifying the path to which the file or directory is to be installed under the desti- nation. In both cases the paths are represented with forward slashes. If the "from" path is inside the top-level di- rectory documented by the corresponding type value, then the path is specified relative to that directory. Other- wise the path is absolute. type A string specifying the type of installation rule. The value is one of the following, with some variants provid- ing additional members: file An install(FILES) or install(PROGRAMS) call. The destination and paths members are populated, with paths under the top-level source directory ex- pressed relative to it. The isOptional member may exist. This type has no additional members. directory An install(DIRECTORY) call. The destination and paths members are populated, with paths under the top-level source directory expressed relative to it. The isOptional member may exist. This type has no additional members. target An install(TARGETS) call. The destination and paths members are populated, with paths under the top-level build directory expressed relative to it. The isOptional member may exist. This type has additional members targetId, targetIndex, tar- getIsImportLibrary, and targetInstallNamelink. export An install(EXPORT) call. The destination and paths members are populated, with paths under the top-level build directory expressed relative to it. The paths entries refer to files generated automatically by CMake for installation, and their actual values are considered private implementa- tion details. This type has additional members exportName and exportTargets. script An install(SCRIPT) call. This type has additional member scriptFile. code An install(CODE) call. This type has no addi- tional members. importedRuntimeArtifacts An install(IMPORTED_RUNTIME_ARTIFACTS) call. The destination member is populated. The isOptional member may exist. This type has no additional mem- bers. runtimeDependencySet An install(RUNTIME_DEPENDENCY_SET) call or an install(TARGETS) call with RUNTIME_DEPENDENCIES. The destination member is populated. This type has additional members runtimeDependencySetName and runtimeDependencySetType. fileSet An install(TARGETS) call with FILE_SET. The des- tination and paths members are populated. The isOptional member may exist. This type has addi- tional members fileSetName, fileSetType, fileSet- Directories, and fileSetTarget. This type was added in codemodel version 2.4. isExcludeFromAll Optional member that is present with boolean value true when install() is called with the EXCLUDE_FROM_ALL op- tion. isForAllComponents Optional member that is present with boolean value true when install(SCRIPT|CODE) is called with the ALL_COMPO- NENTS option. isOptional Optional member that is present with boolean value true when install() is called with the OPTIONAL option. This is allowed when type is file, directory, or target. targetId Optional member that is present when type is target. The value is a string uniquely identifying the target to be installed. This matches the id member of the target in the main "codemodel" object's targets array. targetIndex Optional member that is present when type is target. The value is an unsigned integer 0-based index into the main "codemodel" object's targets array for the target to be installed. targetIsImportLibrary Optional member that is present when type is target and the installer is for a Windows DLL import library file or for an AIX linker import file. If present, it has boolean value true. targetInstallNamelink Optional member that is present when type is target and the installer corresponds to a target that may use sym- bolic links to implement the VERSION and SOVERSION target properties. The value is a string indicating how the in- staller is supposed to handle the symlinks: skip means the installer should skip the symlinks and install only the real file, and only means the installer should in- stall only the symlinks and not the real file. In all cases the paths member lists what it actually installs. exportName Optional member that is present when type is export. The value is a string specifying the name of the export. exportTargets Optional member that is present when type is export. The value is a JSON array of entries corresponding to the targets included in the export. Each entry is a JSON ob- ject with members: id A string uniquely identifying the target. This matches the id member of the target in the main "codemodel" object's targets array. index An unsigned integer 0-based index into the main "codemodel" object's targets array for the target. runtimeDependencySetName Optional member that is present when type is runtimeDe- pendencySet and the installer was created by an install(RUNTIME_DEPENDENCY_SET) call. The value is a string specifying the name of the runtime dependency set that was installed. runtimeDependencySetType Optional member that is present when type is runtimeDe- pendencySet. The value is a string with one of the fol- lowing values: library Indicates that this installer installs dependen- cies that are not macOS frameworks. framework Indicates that this installer installs dependen- cies that are macOS frameworks. fileSetName Optional member that is present when type is fileSet. The value is a string with the name of the file set. This field was added in codemodel version 2.4. fileSetType Optional member that is present when type is fileSet. The value is a string with the type of the file set. This field was added in codemodel version 2.4. fileSetDirectories Optional member that is present when type is fileSet. The value is a list of strings with the file set's base di- rectories (determined by genex-evaluation of HEADER_DIRS or HEADER_DIRS_<NAME>). This field was added in codemodel version 2.4. fileSetTarget Optional member that is present when type is fileSet. The value is a JSON object with members: id A string uniquely identifying the target. This matches the id member of the target in the main "codemodel" object's targets array. index An unsigned integer 0-based index into the main "codemodel" object's targets array for the target. This field was added in codemodel version 2.4. scriptFile Optional member that is present when type is script. The value is a string specifying the path to the script file on disk, represented with forward slashes. If the file is inside the top-level source directory then the path is specified relative to that directory. Otherwise the path is absolute. backtrace Optional member that is present when a CMake language backtrace to the install() or other command invocation that added this installer is available. The value is an unsigned integer 0-based index into the backtraceGraph member's nodes array. backtraceGraph A "codemodel" version 2 "backtrace graph" whose nodes are refer- enced from backtrace members elsewhere in this "directory" ob- ject. "codemodel" version 2 "target" object A codemodel "target" object is referenced by a "codemodel" version 2 object's targets array. Each "target" object is a JSON object with members: name A string specifying the logical name of the target. id A string uniquely identifying the target. The format is unspec- ified and should not be interpreted by clients. type A string specifying the type of the target. The value is one of EXECUTABLE, STATIC_LIBRARY, SHARED_LIBRARY, MODULE_LIBRARY, OB- JECT_LIBRARY, INTERFACE_LIBRARY, or UTILITY. backtrace Optional member that is present when a CMake language backtrace to the command in the source code that created the target is available. The value is an unsigned integer 0-based index into the backtraceGraph member's nodes array. folder Optional member that is present when the FOLDER target property is set. The value is a JSON object with one member: name A string specifying the name of the target folder. paths A JSON object containing members: source A string specifying the path to the target's source di- rectory, represented with forward slashes. If the direc- tory is inside the top-level source directory then the path is specified relative to that directory (with . for the top-level source directory itself). Otherwise the path is absolute. build A string specifying the path to the target's build direc- tory, represented with forward slashes. If the directory is inside the top-level build directory then the path is specified relative to that directory (with . for the top-level build directory itself). Otherwise the path is absolute. nameOnDisk Optional member that is present for executable and library tar- gets that are linked or archived into a single primary artifact. The value is a string specifying the file name of that artifact on disk. artifacts Optional member that is present for executable and library tar- gets that produce artifacts on disk meant for consumption by de- pendents. The value is a JSON array of entries corresponding to the artifacts. Each entry is a JSON object containing one mem- ber: path A string specifying the path to the file on disk, repre- sented with forward slashes. If the file is inside the top-level build directory then the path is specified rel- ative to that directory. Otherwise the path is absolute. isGeneratorProvided Optional member that is present with boolean value true if the target is provided by CMake's build system generator rather than by a command in the source code. install Optional member that is present when the target has an install() rule. The value is a JSON object with members: prefix A JSON object specifying the installation prefix. It has one member: path A string specifying the value of CMAKE_INSTALL_PREFIX. destinations A JSON array of entries specifying an install destination path. Each entry is a JSON object with members: path A string specifying the install destination path. The path may be absolute or relative to the in- stall prefix. backtrace Optional member that is present when a CMake lan- guage backtrace to the install() command invoca- tion that specified this destination is available. The value is an unsigned integer 0-based index into the backtraceGraph member's nodes array. launchers Optional member that is present on executable targets that have at least one launcher specified by the project. The value is a JSON array of entries corresponding to the specified launchers. Each entry is a JSON object with members: command A string specifying the path to the launcher on disk, represented with forward slashes. If the file is inside the top-level source directory then the path is specified relative to that directory. arguments Optional member that is present when the launcher command has arguments preceding the executable to be launched. The value is a JSON array of strings representing the ar- guments. type A string specifying the type of launcher. The value is one of the following: emulator An emulator for the target platform when cross-compiling. See the CROSSCOMPILING_EMULATOR target property. test A start program for the execution of tests. See the TEST_LAUNCHER target property. This field was added in codemodel version 2.7. link Optional member that is present for executables and shared li- brary targets that link into a runtime binary. The value is a JSON object with members describing the link step: language A string specifying the language (e.g. C, CXX, Fortran) of the toolchain is used to invoke the linker. commandFragments Optional member that is present when fragments of the link command line invocation are available. The value is a JSON array of entries specifying ordered fragments. Each entry is a JSON object with members: fragment A string specifying a fragment of the link command line invocation. The value is encoded in the build system's native shell format. role A string specifying the role of the fragment's content: • flags: link flags. • libraries: link library file paths or flags. • libraryPath: library search path flags. • frameworkPath: macOS framework search path flags. lto Optional member that is present with boolean value true when link-time optimization (a.k.a. interprocedural opti- mization or link-time code generation) is enabled. sysroot Optional member that is present when the CMAKE_SYSROOT_LINK or CMAKE_SYSROOT variable is defined. The value is a JSON object with one member: path A string specifying the absolute path to the sys- root, represented with forward slashes. archive Optional member that is present for static library targets. The value is a JSON object with members describing the archive step: commandFragments Optional member that is present when fragments of the archiver command line invocation are available. The value is a JSON array of entries specifying the frag- ments. Each entry is a JSON object with members: fragment A string specifying a fragment of the archiver command line invocation. The value is encoded in the build system's native shell format. role A string specifying the role of the fragment's content: • flags: archiver flags. lto Optional member that is present with boolean value true when link-time optimization (a.k.a. interprocedural opti- mization or link-time code generation) is enabled. dependencies Optional member that is present when the target depends on other targets. The value is a JSON array of entries corresponding to the dependencies. Each entry is a JSON object with members: id A string uniquely identifying the target on which this target depends. This matches the main id member of the other target. backtrace Optional member that is present when a CMake language backtrace to the add_dependencies(), target_link_libraries(), or other command invocation that created this dependency is available. The value is an unsigned integer 0-based index into the backtraceGraph member's nodes array. fileSets A JSON array of entries corresponding to the target's file sets. Each entry is a JSON object with members: name A string specifying the name of the file set. type A string specifying the type of the file set. See target_sources() supported file set types. visibility A string specifying the visibility of the file set; one of PUBLIC, PRIVATE, or INTERFACE. baseDirectories A JSON array of strings, each specifying a base directory containing sources in the file set. If the directory is inside the top-level source directory then the path is specified relative to that directory. Otherwise the path is absolute. This field was added in codemodel version 2.5. sources A JSON array of entries corresponding to the target's source files. Each entry is a JSON object with members: path A string specifying the path to the source file on disk, represented with forward slashes. If the file is inside the top-level source directory then the path is specified relative to that directory. Otherwise the path is ab- solute. compileGroupIndex Optional member that is present when the source is com- piled. The value is an unsigned integer 0-based index into the compileGroups array. sourceGroupIndex Optional member that is present when the source is part of a source group either via the source_group() command or by default. The value is an unsigned integer 0-based index into the sourceGroups array. isGenerated Optional member that is present with boolean value true if the source is GENERATED. fileSetIndex Optional member that is present when the source is part of a file set. The value is an unsigned integer 0-based index into the fileSets array. This field was added in codemodel version 2.5. backtrace Optional member that is present when a CMake language backtrace to the target_sources(), add_executable(), add_library(), add_custom_target(), or other command in- vocation that added this source to the target is avail- able. The value is an unsigned integer 0-based index into the backtraceGraph member's nodes array. sourceGroups Optional member that is present when sources are grouped to- gether by the source_group() command or by default. The value is a JSON array of entries corresponding to the groups. Each entry is a JSON object with members: name A string specifying the name of the source group. sourceIndexes A JSON array listing the sources belonging to the group. Each entry is an unsigned integer 0-based index into the main sources array for the target. compileGroups Optional member that is present when the target has sources that compile. The value is a JSON array of entries corresponding to groups of sources that all compile with the same settings. Each entry is a JSON object with members: sourceIndexes A JSON array listing the sources belonging to the group. Each entry is an unsigned integer 0-based index into the main sources array for the target. language A string specifying the language (e.g. C, CXX, Fortran) of the toolchain is used to compile the source file. languageStandard Optional member that is present when the language stan- dard is set explicitly (e.g. via CXX_STANDARD) or implic- itly by compile features. Each entry is a JSON object with two members: backtraces Optional member that is present when a CMake lan- guage backtrace to the <LANG>_STANDARD setting is available. If the language standard was set im- plicitly by compile features those are used as the backtrace(s). It's possible for multiple compile features to require the same language standard so there could be multiple backtraces. The value is a JSON array with each entry being an unsigned inte- ger 0-based index into the backtraceGraph member's nodes array. standard String representing the language standard. This field was added in codemodel version 2.2. compileCommandFragments Optional member that is present when fragments of the compiler command line invocation are available. The value is a JSON array of entries specifying ordered frag- ments. Each entry is a JSON object with one member: fragment A string specifying a fragment of the compile com- mand line invocation. The value is encoded in the build system's native shell format. includes Optional member that is present when there are include directories. The value is a JSON array with an entry for each directory. Each entry is a JSON object with mem- bers: path A string specifying the path to the include direc- tory, represented with forward slashes. isSystem Optional member that is present with boolean value true if the include directory is marked as a sys- tem include directory. backtrace Optional member that is present when a CMake lan- guage backtrace to the target_include_directories() or other command in- vocation that added this include directory is available. The value is an unsigned integer 0-based index into the backtraceGraph member's nodes array. frameworks Optional member that is present when, on Apple platforms, there are frameworks. The value is a JSON array with an entry for each directory. Each entry is a JSON object with members: path A string specifying the path to the framework di- rectory, represented with forward slashes. isSystem Optional member that is present with boolean value true if the framework is marked as a system one. backtrace Optional member that is present when a CMake lan- guage backtrace to the target_link_libraries() or other command invocation that added this framework is available. The value is an unsigned integer 0-based index into the backtraceGraph member's nodes array. This field was added in codemodel version 2.6. precompileHeaders Optional member that is present when target_precompile_headers() or other command invocations set PRECOMPILE_HEADERS on the target. The value is a JSON array with an entry for each header. Each entry is a JSON object with members: header Full path to the precompile header file. backtrace Optional member that is present when a CMake lan- guage backtrace to the target_precompile_headers() or other command invocation that added this pre- compiled header is available. The value is an un- signed integer 0-based index into the backtrace- Graph member's nodes array. This field was added in codemodel version 2.1. defines Optional member that is present when there are preproces- sor definitions. The value is a JSON array with an entry for each definition. Each entry is a JSON object with members: define A string specifying the preprocessor definition in the format <name>[=<value>], e.g. DEF or DEF=1. backtrace Optional member that is present when a CMake lan- guage backtrace to the target_compile_definitions() or other command in- vocation that added this preprocessor definition is available. The value is an unsigned integer 0-based index into the backtraceGraph member's nodes array. sysroot Optional member that is present when the CMAKE_SYSROOT_COMPILE or CMAKE_SYSROOT variable is de- fined. The value is a JSON object with one member: path A string specifying the absolute path to the sys- root, represented with forward slashes. backtraceGraph A "codemodel" version 2 "backtrace graph" whose nodes are refer- enced from backtrace members elsewhere in this "target" object. "codemodel" version 2 "backtrace graph" The backtraceGraph member of a "codemodel" version 2 "directory" ob- ject, or "codemodel" version 2 "target" object is a JSON object de- scribing a graph of backtraces. Its nodes are referenced from back- trace members elsewhere in the containing object. The backtrace graph object members are: nodes A JSON array listing nodes in the backtrace graph. Each entry is a JSON object with members: file An unsigned integer 0-based index into the backtrace files array. line An optional member present when the node represents a line within the file. The value is an unsigned integer 1-based line number. command An optional member present when the node represents a command invocation within the file. The value is an un- signed integer 0-based index into the backtrace commands array. parent An optional member present when the node is not the bot- tom of the call stack. The value is an unsigned integer 0-based index of another entry in the backtrace nodes ar- ray. commands A JSON array listing command names referenced by backtrace nodes. Each entry is a string specifying a command name. files A JSON array listing CMake language files referenced by back- trace nodes. Each entry is a string specifying the path to a file, represented with forward slashes. If the file is inside the top-level source directory then the path is specified rela- tive to that directory. Otherwise the path is absolute. Object Kind "configureLog" The configureLog object kind describes the location and contents of a cmake-configure-log(7) file. There is only one configureLog object major version, version 1. "configureLog" version 1 configureLog object version 1 is a JSON object: { "kind": "configureLog", "version": { "major": 1, "minor": 0 }, "path": "/path/to/top-level-build-dir/CMakeFiles/CMakeConfigureLog.yaml", "eventKindNames": [ "try_compile-v1", "try_run-v1" ] } The members specific to configureLog objects are: path A string specifying the path to the configure log file. Clients must read the log file from this path, which may be different than the path documented by cmake-configure-log(7). The log file may not exist if no events are logged. eventKindNames A JSON array whose entries are each a JSON string naming one of the cmake-configure-log(7) versioned event kinds. At most one version of each configure log event kind will be listed. Al- though the configure log may contain other (versioned) event kinds, clients must ignore those that are not listed in this field. Object Kind "cache" The cache object kind lists cache entries. These are the Variables stored in the persistent cache (CMakeCache.txt) for the build tree. There is only one cache object major version, version 2. Version 1 does not exist to avoid confusion with that from cmake-server(7) mode. "cache" version 2 cache object version 2 is a JSON object: { "kind": "cache", "version": { "major": 2, "minor": 0 }, "entries": [ { "name": "BUILD_SHARED_LIBS", "value": "ON", "type": "BOOL", "properties": [ { "name": "HELPSTRING", "value": "Build shared libraries" } ] }, { "name": "CMAKE_GENERATOR", "value": "Unix Makefiles", "type": "INTERNAL", "properties": [ { "name": "HELPSTRING", "value": "Name of generator." } ] } ] } The members specific to cache objects are: entries A JSON array whose entries are each a JSON object specifying a cache entry. The members of each entry are: name A string specifying the name of the entry. value A string specifying the value of the entry. type A string specifying the type of the entry used by cmake-gui(1) to choose a widget for editing. properties A JSON array of entries specifying associated cache entry properties. Each entry is a JSON object containing mem- bers: name A string specifying the name of the cache entry property. value A string specifying the value of the cache entry property. Object Kind "cmakeFiles" The cmakeFiles object kind lists files used by CMake while configuring and generating the build system. These include the CMakeLists.txt files as well as included .cmake files. There is only one cmakeFiles object major version, version 1. "cmakeFiles" version 1 cmakeFiles object version 1 is a JSON object: { "kind": "cmakeFiles", "version": { "major": 1, "minor": 1 }, "paths": { "build": "/path/to/top-level-build-dir", "source": "/path/to/top-level-source-dir" }, "inputs": [ { "path": "CMakeLists.txt" }, { "isGenerated": true, "path": "/path/to/top-level-build-dir/.../CMakeSystem.cmake" }, { "isExternal": true, "path": "/path/to/external/third-party/module.cmake" }, { "isCMake": true, "isExternal": true, "path": "/path/to/cmake/Modules/CMakeGenericSystem.cmake" } ], "globsDependent": [ { "expression": "src/*.cxx", "recurse": true, "files": [ "src/foo.cxx", "src/bar.cxx" ] } ] } The members specific to cmakeFiles objects are: paths A JSON object containing members: source A string specifying the absolute path to the top-level source directory, represented with forward slashes. build A string specifying the absolute path to the top-level build directory, represented with forward slashes. inputs A JSON array whose entries are each a JSON object specifying an input file used by CMake when configuring and generating the build system. The members of each entry are: path A string specifying the path to an input file to CMake, represented with forward slashes. If the file is inside the top-level source directory then the path is specified relative to that directory. Otherwise the path is ab- solute. isGenerated Optional member that is present with boolean value true if the path specifies a file that is under the top-level build directory and the build is out-of-source. This member is not available on in-source builds. isExternal Optional member that is present with boolean value true if the path specifies a file that is not under the top-level source or build directories. isCMake Optional member that is present with boolean value true if the path specifies a file in the CMake installation. globsDependent Optional member that is present when the project calls file(GLOB) or file(GLOB_RECURSE) with the CONFIGURE_DEPENDS op- tion. The value is a JSON array of JSON objects, each specify- ing a globbing expression and the list of paths it matched. If the globbing expression no longer matches the same list of paths, CMake considers the build system to be out of date. This field was added in cmakeFiles version 1.1. The members of each entry are: expression A string specifying the globbing expression. recurse Optional member that is present with boolean value true if the entry corresponds to a file(GLOB_RECURSE) call. Otherwise the entry corresponds to a file(GLOB) call. listDirectories Optional member that is present with boolean value true if file(GLOB) was called without LIST_DIRECTORIES false or file(GLOB_RECURSE) was called with LIST_DIRECTORIES true. followSymlinks Optional member that is present with boolean value true if file(GLOB) was called with the FOLLOW_SYMLINKS option. relative Optional member that is present if file(GLOB) was called with the RELATIVE <path> option. The value is a string containing the <path> given. paths A JSON array of strings specifying the paths matched by the call to file(GLOB) or file(GLOB_RECURSE). Object Kind "toolchains" The toolchains object kind lists properties of the toolchains used dur- ing the build. These include the language, compiler path, ID, and ver- sion. There is only one toolchains object major version, version 1. "toolchains" version 1 toolchains object version 1 is a JSON object: { "kind": "toolchains", "version": { "major": 1, "minor": 0 }, "toolchains": [ { "language": "C", "compiler": { "path": "/usr/bin/cc", "id": "GNU", "version": "9.3.0", "implicit": { "includeDirectories": [ "/usr/lib/gcc/x86_64-linux-gnu/9/include", "/usr/local/include", "/usr/include/x86_64-linux-gnu", "/usr/include" ], "linkDirectories": [ "/usr/lib/gcc/x86_64-linux-gnu/9", "/usr/lib/x86_64-linux-gnu", "/usr/lib", "/lib/x86_64-linux-gnu", "/lib" ], "linkFrameworkDirectories": [], "linkLibraries": [ "gcc", "gcc_s", "c", "gcc", "gcc_s" ] } }, "sourceFileExtensions": [ "c", "m" ] }, { "language": "CXX", "compiler": { "path": "/usr/bin/c++", "id": "GNU", "version": "9.3.0", "implicit": { "includeDirectories": [ "/usr/include/c++/9", "/usr/include/x86_64-linux-gnu/c++/9", "/usr/include/c++/9/backward", "/usr/lib/gcc/x86_64-linux-gnu/9/include", "/usr/local/include", "/usr/include/x86_64-linux-gnu", "/usr/include" ], "linkDirectories": [ "/usr/lib/gcc/x86_64-linux-gnu/9", "/usr/lib/x86_64-linux-gnu", "/usr/lib", "/lib/x86_64-linux-gnu", "/lib" ], "linkFrameworkDirectories": [], "linkLibraries": [ "stdc++", "m", "gcc_s", "gcc", "c", "gcc_s", "gcc" ] } }, "sourceFileExtensions": [ "C", "M", "c++", "cc", "cpp", "cxx", "mm", "CPP" ] } ] } The members specific to toolchains objects are: toolchains A JSON array whose entries are each a JSON object specifying a toolchain associated with a particular language. The members of each entry are: language A JSON string specifying the toolchain language, like C or CXX. Language names are the same as language names that can be passed to the project() command. Because CMake only supports a single toolchain per language, this field can be used as a key. compiler A JSON object containing members: path Optional member that is present when the CMAKE_<LANG>_COMPILER variable is defined for the current language. Its value is a JSON string hold- ing the path to the compiler. id Optional member that is present when the CMAKE_<LANG>_COMPILER_ID variable is defined for the current language. Its value is a JSON string holding the ID (GNU, MSVC, etc.) of the compiler. version Optional member that is present when the CMAKE_<LANG>_COMPILER_VERSION variable is defined for the current language. Its value is a JSON string holding the version of the compiler. target Optional member that is present when the CMAKE_<LANG>_COMPILER_TARGET variable is defined for the current language. Its value is a JSON string holding the cross-compiling target of the compiler. implicit A JSON object containing members: includeDirectories Optional member that is present when the CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES variable is defined for the current lan- guage. Its value is a JSON array of JSON strings where each string holds a path to an implicit include directory for the com- piler. linkDirectories Optional member that is present when the CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES variable is defined for the current lan- guage. Its value is a JSON array of JSON strings where each string holds a path to an implicit link directory for the com- piler. linkFrameworkDirectories Optional member that is present when the CMAKE_<LANG>_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES variable is defined for the current lan- guage. Its value is a JSON array of JSON strings where each string holds a path to an implicit link framework directory for the compiler. linkLibraries Optional member that is present when the CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES vari- able is defined for the current language. Its value is a JSON array of JSON strings where each string holds a path to an im- plicit link library for the compiler. sourceFileExtensions Optional member that is present when the CMAKE_<LANG>_SOURCE_FILE_EXTENSIONS variable is defined for the current language. Its value is a JSON array of JSON strings where each each string holds a file exten- sion (without the leading dot) for the language. COPYRIGHT 2000-2024 Kitware, Inc. and Contributors 3.31.9 Nov 01, 2025 CMAKE-FILE-API(7)
NAME | INTRODUCTION | API V1 | OBJECT KINDS | COPYRIGHT
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