cmake-file-api(7)¶
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
orthogonal 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 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 recognized 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 recognized 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 unnecessarily.
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 components following semantic version conventions. The value must be
a JSON integer specifying a (non-negative) major version number, or
a JSON object containing
major
and (optionally)minor
members specifying non-negative integer version components, ora 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 version 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 major 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 references. 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 selected 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 members:
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 containing CMake resources like theModules/
directory (seeCMAKE_ROOT
).generator
A JSON object describing the CMake generator used for the build. It has members:
multiConfig
A boolean specifying whether the generator supports multiple output configurations.
name
A string specifying the name of the generator.
platform
If the generator supports
CMAKE_GENERATOR_PLATFORM
, this is a string specifying 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 Reference.
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 containing 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 directory 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 single
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 singleerror
member containing a string with an error message. Otherwise, this member is a JSON object mirroring the content of thequery.json
file. The members are:client
A copy of the
query.json
fileclient
member, if it exists.requests
A copy of the
query.json
filerequests
member, if it exists.responses
If the
query.json
filerequests
member is missing or invalid, this member is a JSON object with a singleerror
member containing a string with an error message. Otherwise, this member contains a JSON array with a response for each entry of therequests
array, in the same order. Each response isa JSON object with a single
error
member containing a string with an error message, ora v1 Reply File Reference to the corresponding reply file for the requested object 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
andminor
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 reply. However, after generating a new reply CMake will attempt to remove 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 reply. 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 minor 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 version
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
modeled 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 configurations. On single-configuration generators there is one entry for the value of the
CMAKE_BUILD_TYPE
variable. For multi-configuration generators there is an entry for each configuration listed in theCMAKE_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
CMakeLists.txt
file. The first entry corresponds to the top-level directory. Each entry is 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, 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.parentIndex
Optional member that is present when the directory is not top-level. The value is an unsigned integer 0-based index of another entry in the main
directories
array that corresponds to the parent directory that added this directory as a subdirectory.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()
orsubdirs()
command. Each entry is an unsigned integer 0-based index of another entry in the maindirectories
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 entries 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 thecmake_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 subdirectories contains anyinstall()
rules, i.e. whether amake 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 theproject()
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 integer 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 another 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 directory 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 entries 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()
, andadd_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 byjsonFile
.directoryIndex
An unsigned integer 0-based index into the main
directories
array indicating the build system directory 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, 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.
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 corresponding
install()
command invocation.destination
Optional member that is present for specific
type
values below. The value is a string specifying the install destination 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 corresponding to the paths (files or directories) to be installed. Each entry is one of:A string specifying the path from which a file or directory 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 destination.
In both cases the paths are represented with forward slashes. If the "from" path is inside the top-level directory documented by the corresponding
type
value, then the path is specified relative to that directory. Otherwise the path is absolute.type
A string specifying the type of installation rule. The value is one of the following, with some variants providing additional members:
file
An
install(FILES)
orinstall(PROGRAMS)
call. Thedestination
andpaths
members are populated, with paths under the top-level source directory expressed relative to it. TheisOptional
member may exist. This type has no additional members.directory
An
install(DIRECTORY)
call. Thedestination
andpaths
members are populated, with paths under the top-level source directory expressed relative to it. TheisOptional
member may exist. This type has no additional members.target
An
install(TARGETS)
call. Thedestination
andpaths
members are populated, with paths under the top-level build directory expressed relative to it. TheisOptional
member may exist. This type has additional memberstargetId
,targetIndex
,targetIsImportLibrary
, andtargetInstallNamelink
.export
An
install(EXPORT)
call. Thedestination
andpaths
members are populated, with paths under the top-level build directory expressed relative to it. Thepaths
entries refer to files generated automatically by CMake for installation, and their actual values are considered private implementation details. This type has additional membersexportName
andexportTargets
.script
An
install(SCRIPT)
call. This type has additional memberscriptFile
.code
An
install(CODE)
call. This type has no additional members.importedRuntimeArtifacts
An
install(IMPORTED_RUNTIME_ARTIFACTS)
call. Thedestination
member is populated. TheisOptional
member may exist. This type has no additional members.runtimeDependencySet
An
install(RUNTIME_DEPENDENCY_SET)
call or aninstall(TARGETS)
call withRUNTIME_DEPENDENCIES
. Thedestination
member is populated. This type has additional membersruntimeDependencySetName
andruntimeDependencySetType
.fileSet
An
install(TARGETS)
call withFILE_SET
. Thedestination
andpaths
members are populated. TheisOptional
member may exist. This type has additional membersfileSetName
,fileSetType
,fileSetDirectories
, andfileSetTarget
.This type was added in codemodel version 2.4.
isExcludeFromAll
Optional member that is present with boolean value
true
wheninstall()
is called with theEXCLUDE_FROM_ALL
option.isForAllComponents
Optional member that is present with boolean value
true
wheninstall(SCRIPT|CODE)
is called with theALL_COMPONENTS
option.isOptional
Optional member that is present with boolean value
true
wheninstall()
is called with theOPTIONAL
option. This is allowed whentype
isfile
,directory
, ortarget
.targetId
Optional member that is present when
type
istarget
. The value is a string uniquely identifying the target to be installed. This matches theid
member of the target in the main "codemodel" object'stargets
array.targetIndex
Optional member that is present when
type
istarget
. The value is an unsigned integer 0-based index into the main "codemodel" object'stargets
array for the target to be installed.targetIsImportLibrary
Optional member that is present when
type
istarget
and the installer is for a Windows DLL import library file or for an AIX linker import file. If present, it has boolean valuetrue
.targetInstallNamelink
Optional member that is present when
type
istarget
and the installer corresponds to a target that may use symbolic links to implement theVERSION
andSOVERSION
target properties. The value is a string indicating how the installer is supposed to handle the symlinks:skip
means the installer should skip the symlinks and install only the real file, andonly
means the installer should install only the symlinks and not the real file. In all cases thepaths
member lists what it actually installs.exportName
Optional member that is present when
type
isexport
. The value is a string specifying the name of the export.exportTargets
Optional member that is present when
type
isexport
. The value is a JSON array of entries corresponding to the targets included in the export. Each entry 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'stargets
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
isruntimeDependencySet
and the installer was created by aninstall(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
isruntimeDependencySet
. The value is a string with one of the following values:library
Indicates that this installer installs dependencies that are not macOS frameworks.
framework
Indicates that this installer installs dependencies that are macOS frameworks.
fileSetName
Optional member that is present when
type
isfileSet
. 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
isfileSet
. 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
isfileSet
. The value is a list of strings with the file set's base directories (determined by genex-evaluation ofHEADER_DIRS
orHEADER_DIRS_<NAME>
).This field was added in codemodel version 2.4.
fileSetTarget
Optional member that is present when
type
isfileSet
. 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'stargets
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
isscript
. 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 thebacktraceGraph
member'snodes
array.
backtraceGraph
A "codemodel" version 2 "backtrace graph" whose nodes are referenced from
backtrace
members elsewhere in this "directory" object.
"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 unspecified 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
,OBJECT_LIBRARY
,INTERFACE_LIBRARY
, orUTILITY
.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'snodes
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 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 target's build directory, 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 targets 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 targets that produce artifacts on disk meant for consumption by dependents. The value is a JSON array of entries corresponding to the artifacts. Each entry is a JSON object containing one member:
path
A string specifying the path to the file on disk, represented with forward slashes. If the file is inside the top-level build directory then the path is specified relative 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 install prefix.
backtrace
Optional member that is present when a CMake language backtrace to the
install()
command invocation that specified this destination is available. The value is an unsigned integer 0-based index into thebacktraceGraph
member'snodes
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 arguments.
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 library 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 optimization or link-time code generation) is enabled.sysroot
Optional member that is present when the
CMAKE_SYSROOT_LINK
orCMAKE_SYSROOT
variable is defined. The value is a JSON object with one member:path
A string specifying the absolute path to the sysroot, 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 fragments. 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 optimization 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 thebacktraceGraph
member'snodes
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
, orINTERFACE
.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 absolute.
compileGroupIndex
Optional member that is present when the source is compiled. 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 thesourceGroups
array.isGenerated
Optional member that is present with boolean value
true
if the source isGENERATED
.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 invocation that added this source to the target is available. The value is an unsigned integer 0-based index into thebacktraceGraph
member'snodes
array.
sourceGroups
Optional member that is present when sources are grouped together 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 standard is set explicitly (e.g. via
CXX_STANDARD
) or implicitly by compile features. Each entry is a JSON object with two members:backtraces
Optional member that is present when a CMake language backtrace to the
<LANG>_STANDARD
setting is available. If the language standard was set implicitly 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 integer 0-based index into thebacktraceGraph
member'snodes
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 fragments. Each entry is a JSON object with one member:
fragment
A string specifying a fragment of the compile command 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 members:
path
A string specifying the path to the include directory, represented with forward slashes.
isSystem
Optional member that is present with boolean value
true
if the include directory is marked as a system include directory.backtrace
Optional member that is present when a CMake language backtrace to the
target_include_directories()
or other command invocation that added this include directory is available. The value is an unsigned integer 0-based index into thebacktraceGraph
member'snodes
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 directory, 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 language 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 thebacktraceGraph
member'snodes
array.
This field was added in codemodel version 2.6.
precompileHeaders
Optional member that is present when
target_precompile_headers()
or other command invocations setPRECOMPILE_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 language backtrace to the
target_precompile_headers()
or other command invocation that added this precompiled header is available. The value is an unsigned integer 0-based index into thebacktraceGraph
member'snodes
array.
This field was added in codemodel version 2.1.
defines
Optional member that is present when there are preprocessor 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
orDEF=1
.backtrace
Optional member that is present when a CMake language backtrace to the
target_compile_definitions()
or other command invocation that added this preprocessor definition is available. The value is an unsigned integer 0-based index into thebacktraceGraph
member'snodes
array.
sysroot
Optional member that is present when the
CMAKE_SYSROOT_COMPILE
orCMAKE_SYSROOT
variable is defined. The value is a JSON object with one member:path
A string specifying the absolute path to the sysroot, represented with forward slashes.
backtraceGraph
A "codemodel" version 2 "backtrace graph" whose nodes are referenced from
backtrace
members elsewhere in this "target" object.
"codemodel" version 2 "backtrace graph"¶
The backtraceGraph
member of a "codemodel" version 2 "directory" object,
or "codemodel" version 2 "target" object is a JSON object describing a
graph of backtraces. Its nodes are referenced from backtrace
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 unsigned integer 0-based index into the backtrace
commands
array.parent
An optional member present when the node is not the bottom of the call stack. The value is an unsigned integer 0-based index of another entry in the backtrace
nodes
array.
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 backtrace 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 relative 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. Although 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 members:
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 absolute.
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)
orfile(GLOB_RECURSE)
with theCONFIGURE_DEPENDS
option. The value is a JSON array of JSON objects, each specifying 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 afile(GLOB_RECURSE)
call. Otherwise the entry corresponds to afile(GLOB)
call.listDirectories
Optional member that is present with boolean value
true
iffile(GLOB)
was called withoutLIST_DIRECTORIES false
orfile(GLOB_RECURSE)
was called withLIST_DIRECTORIES true
.followSymlinks
Optional member that is present with boolean value
true
iffile(GLOB)
was called with theFOLLOW_SYMLINKS
option.relative
Optional member that is present if
file(GLOB)
was called with theRELATIVE <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)
orfile(GLOB_RECURSE)
.
Object Kind "toolchains"¶
The toolchains
object kind lists properties of the toolchains used during
the build. These include the language, compiler path, ID, and version.
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 holding 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 language. Its value is a JSON array of JSON strings where each string holds a path to an implicit include directory for the compiler.linkDirectories
Optional member that is present when the
CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES
variable is defined for the current language. Its value is a JSON array of JSON strings where each string holds a path to an implicit link directory for the compiler.linkFrameworkDirectories
Optional member that is present when the
CMAKE_<LANG>_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES
variable is defined for the current language. 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
variable is defined for the current language. Its value is a JSON array of JSON strings where each string holds a path to an implicit 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 extension (without the leading dot) for the language.