Ubuntu Manpage: cmake-file-api - CMake File-Based API

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 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.

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 specific 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 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, 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 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 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 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 single error member containing a
string with an error message. Otherwise, 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 member, if it exists.

requests
A copy of the query.json file requests member, 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
containing a string with an error message. Otherwise, this
member contains a JSON array with a response for each entry of
the requests array, in the same order. Each response is

• a JSON object with a single error member containing a string
with an error message, or

• a 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 and minor specifying integer version components of
the object kind.

jsonFile
A JSON string specifying a path relative to the reply index file to another JSON
file containing the object.

v1 Reply Files
Reply files containing specific Object Kinds are written by CMake. The names of these
files are unspecified and must not be interpreted by clients. Clients must first read the
v1 Reply Index File and follow references to the names of the desired response objects.

Reply files (including the index file) will never be replaced by files of the same name
but different content. This allows a client to read the files concurrently with a running
CMake that may generate a new 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": 6 },
"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 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 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() 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 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 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 subdirectories 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 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(), 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 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) or install(PROGRAMS) 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.

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, targetIsImportLibrary, 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 implementation 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 additional members.

importedRuntimeArtifacts
An install(IMPORTED_RUNTIME_ARTIFACTS) call. The destination member
is populated. The isOptional member may exist. This type has no
additional members.

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 destination and paths
members are populated. The isOptional member may exist. This type
has additional members fileSetName, fileSetType, fileSetDirectories,
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 option.

isForAllComponents
Optional member that is present with boolean value true when
install(SCRIPT|CODE) is called with the ALL_COMPONENTS option.

isOptional
Optional member that is present with boolean value true when install() is
called with the OPTIONAL option. This is allowed when type is file,
directory, or target.

targetId
Optional member that is present when type is target. The value is a string
uniquely identifying the target to be installed. This matches the id member
of the target in the main "codemodel" object's targets array.

targetIndex
Optional member that is present when type is target. The value is an
unsigned integer 0-based index into the main "codemodel" object's targets
array for the target to be installed.

targetIsImportLibrary
Optional member that is present when type is target and the installer is for
a Windows DLL import library file or for an AIX linker import file. If
present, it has boolean value true.

targetInstallNamelink
Optional member that is present when type is target and the installer
corresponds to a target that may use symbolic links to implement the VERSION
and SOVERSION 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, and only means the
installer should install 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 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.

runtimeDependencySetName
Optional member that is present when type is runtimeDependencySet 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 runtimeDependencySet. 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 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 directories (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 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,
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 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 the
backtraceGraph member's nodes array.

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 or CMAKE_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 the backtraceGraph member's nodes array.

fileSets
A JSON array of entries corresponding to the target's file sets. Each entry is a
JSON object with members:

name A string specifying the name of the file set.

type A string specifying the type of the file set. See target_sources()
supported file set types.

visibility
A string specifying the visibility of the file set; one of PUBLIC, PRIVATE,
or INTERFACE.

baseDirectories
A JSON array of strings specifying the base directories containing sources
in the file set.

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 the sourceGroups array.

isGenerated
Optional member that is present with boolean value true if the source is
GENERATED.

fileSetIndex
Optional member that is present when the source is part of a file set. The
value is an unsigned integer 0-based index into the fileSets array.

This field was added in codemodel version 2.5.

backtrace
Optional member that is present when a CMake language backtrace to the
target_sources(), add_executable(), add_library(), add_custom_target(), or
other command invocation that added this source to the target is available.
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 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 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 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 the backtraceGraph member's nodes array.

frameworks
Optional member that is present when, on Apple platforms, there are
frameworks. The value is a JSON array with an entry for each directory.
Each entry is a JSON object with members:

path A string specifying the path to the framework 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 the backtraceGraph member's nodes array.

This field was added in codemodel version 2.6.

precompileHeaders
Optional member that is present when target_precompile_headers() or other
command invocations set PRECOMPILE_HEADERS on the target. The value is a
JSON array with an entry for each header. Each entry is a JSON object with
members:

header Full path to the precompile header file.

backtrace
Optional member that is present when a CMake 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 the backtraceGraph member's nodes 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 or DEF=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 the backtraceGraph member's nodes
array.

sysroot
Optional member that is present when the CMAKE_SYSROOT_COMPILE or
CMAKE_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": 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
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.

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.

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