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.
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.
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 and fol-
low 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": 4 },
"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 bool-
ean 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.
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.
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 abso-
lute.
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.
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.
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 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": 0 },
"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"
}
]
}
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 abso-
lute.
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.
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
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3.25.1 November 30, 2022 CMAKE-FILE-API(7)
Generated by dwww version 1.15 on Tue Jun 25 20:40:31 CEST 2024.