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diff --git a/Help/manual/cmake-server.7.rst b/Help/manual/cmake-server.7.rst index 8f10b9f0e..6c8d0f446 100644 --- a/Help/manual/cmake-server.7.rst +++ b/Help/manual/cmake-server.7.rst @@ -3,742 +3,5 @@ cmake-server(7) *************** -.. only:: html - - .. contents:: - -.. deprecated:: 3.15 - - This will be removed from a future version of CMake. - Clients should use the :manual:`cmake-file-api(7)` instead. - -Introduction -============ - -:manual:`cmake(1)` is capable of providing semantic information about -CMake code it executes to generate a buildsystem. If executed with -the ``-E server`` command line options, it starts in a long running mode -and allows a client to request the available information via a JSON protocol. - -The protocol is designed to be useful to IDEs, refactoring tools, and -other tools which have a need to understand the buildsystem in entirety. - -A single :manual:`cmake-buildsystem(7)` may describe buildsystem contents -and build properties which differ based on -:manual:`generation-time context <cmake-generator-expressions(7)>` -including: - -* The Platform (eg, Windows, APPLE, Linux). -* The build configuration (eg, Debug, Release, Coverage). -* The Compiler (eg, MSVC, GCC, Clang) and compiler version. -* The language of the source files compiled. -* Available compile features (eg CXX variadic templates). -* CMake policies. - -The protocol aims to provide information to tooling to satisfy several -needs: - -#. Provide a complete and easily parsed source of all information relevant - to the tooling as it relates to the source code. There should be no need - for tooling to parse generated buildsystems to access include directories - or compile definitions for example. -#. Semantic information about the CMake buildsystem itself. -#. Provide a stable interface for reading the information in the CMake cache. -#. Information for determining when cmake needs to be re-run as a result of - file changes. - - -Operation -========= - -Start :manual:`cmake(1)` in the server command mode, supplying the path to -the build directory to process:: - - cmake -E server (--debug|--pipe=<NAMED_PIPE>) - -The server will communicate using stdin/stdout (with the ``--debug`` parameter) -or using a named pipe (with the ``--pipe=<NAMED_PIPE>`` parameter). Note -that "named pipe" refers to a local domain socket on Unix and to a named pipe -on Windows. - -When connecting to the server (via named pipe or by starting it in ``--debug`` -mode), the server will reply with a hello message:: - - [== "CMake Server" ==[ - {"supportedProtocolVersions":[{"major":1,"minor":0}],"type":"hello"} - ]== "CMake Server" ==] - -Messages sent to and from the process are wrapped in magic strings:: - - [== "CMake Server" ==[ - { - ... some JSON message ... - } - ]== "CMake Server" ==] - -The server is now ready to accept further requests via the named pipe -or stdin. - - -Debugging -========= - -CMake server mode can be asked to provide statistics on execution times, etc. -or to dump a copy of the response into a file. This is done passing a "debug" -JSON object as a child of the request. - -The debug object supports the "showStats" key, which takes a boolean and makes -the server mode return a "zzzDebug" object with stats as part of its response. -"dumpToFile" takes a string value and will cause the cmake server to copy -the response into the given filename. - -This is a response from the cmake server with "showStats" set to true:: - - [== "CMake Server" ==[ - { - "cookie":"", - "errorMessage":"Waiting for type \"handshake\".", - "inReplyTo":"unknown", - "type":"error", - "zzzDebug": { - "dumpFile":"/tmp/error.txt", - "jsonSerialization":0.011016, - "size":111, - "totalTime":0.025995 - } - } - ]== "CMake Server" ==] - -The server has made a copy of this response into the file /tmp/error.txt and -took 0.011 seconds to turn the JSON response into a string, and it took 0.025 -seconds to process the request in total. The reply has a size of 111 bytes. - - -Protocol API -============ - - -General Message Layout ----------------------- - -All messages need to have a "type" value, which identifies the type of -message that is passed back or forth. E.g. the initial message sent by the -server is of type "hello". Messages without a type will generate an response -of type "error". - -All requests sent to the server may contain a "cookie" value. This value -will he handed back unchanged in all responses triggered by the request. - -All responses will contain a value "inReplyTo", which may be empty in -case of parse errors, but will contain the type of the request message -in all other cases. - - -Type "reply" -^^^^^^^^^^^^ - -This type is used by the server to reply to requests. - -The message may -- depending on the type of the original request -- -contain values. - -Example:: - - [== "CMake Server" ==[ - {"cookie":"zimtstern","inReplyTo":"handshake","type":"reply"} - ]== "CMake Server" ==] - - -Type "error" -^^^^^^^^^^^^ - -This type is used to return an error condition to the client. It will -contain an "errorMessage". - -Example:: - - [== "CMake Server" ==[ - {"cookie":"","errorMessage":"Protocol version not supported.","inReplyTo":"handshake","type":"error"} - ]== "CMake Server" ==] - - -Type "progress" -^^^^^^^^^^^^^^^ - -When the server is busy for a long time, it is polite to send back replies of -type "progress" to the client. These will contain a "progressMessage" with a -string describing the action currently taking place as well as -"progressMinimum", "progressMaximum" and "progressCurrent" with integer values -describing the range of progress. - -Messages of type "progress" will be followed by more "progress" messages or with -a message of type "reply" or "error" that complete the request. - -"progress" messages may not be emitted after the "reply" or "error" message for -the request that triggered the responses was delivered. - - -Type "message" -^^^^^^^^^^^^^^ - -A message is triggered when the server processes a request and produces some -form of output that should be displayed to the user. A Message has a "message" -with the actual text to display as well as a "title" with a suggested dialog -box title. - -Example:: - - [== "CMake Server" ==[ - {"cookie":"","message":"Something happened.","title":"Title Text","inReplyTo":"handshake","type":"message"} - ]== "CMake Server" ==] - - -Type "signal" -^^^^^^^^^^^^^ - -The server can send signals when it detects changes in the system state. Signals -are of type "signal", have an empty "cookie" and "inReplyTo" field and always -have a "name" set to show which signal was sent. - - -Specific Signals ----------------- - -The cmake server may sent signals with the following names: - -"dirty" Signal -^^^^^^^^^^^^^^ - -The "dirty" signal is sent whenever the server determines that the configuration -of the project is no longer up-to-date. This happens when any of the files that have -an influence on the build system is changed. - -The "dirty" signal may look like this:: - - [== "CMake Server" ==[ - { - "cookie":"", - "inReplyTo":"", - "name":"dirty", - "type":"signal"} - ]== "CMake Server" ==] - - -"fileChange" Signal -^^^^^^^^^^^^^^^^^^^ - -The "fileChange" signal is sent whenever a watched file is changed. It contains -the "path" that has changed and a list of "properties" with the kind of change -that was detected. Possible changes are "change" and "rename". - -The "fileChange" signal looks like this:: - - [== "CMake Server" ==[ - { - "cookie":"", - "inReplyTo":"", - "name":"fileChange", - "path":"/absolute/CMakeLists.txt", - "properties":["change"], - "type":"signal"} - ]== "CMake Server" ==] - - -Specific Message Types ----------------------- - - -Type "hello" -^^^^^^^^^^^^ - -The initial message send by the cmake server on startup is of type "hello". -This is the only message ever sent by the server that is not of type "reply", -"progress" or "error". - -It will contain "supportedProtocolVersions" with an array of server protocol -versions supported by the cmake server. These are JSON objects with "major" and -"minor" keys containing non-negative integer values. Some versions may be marked -as experimental. These will contain the "isExperimental" key set to true. Enabling -these requires a special command line argument when starting the cmake server mode. - -Within a "major" version all "minor" versions are fully backwards compatible. -New "minor" versions may introduce functionality in such a way that existing -clients of the same "major" version will continue to work, provided they -ignore keys in the output that they do not know about. - -Example:: - - [== "CMake Server" ==[ - {"supportedProtocolVersions":[{"major":0,"minor":1}],"type":"hello"} - ]== "CMake Server" ==] - - -Type "handshake" -^^^^^^^^^^^^^^^^ - -The first request that the client may send to the server is of type "handshake". - -This request needs to pass one of the "supportedProtocolVersions" of the "hello" -type response received earlier back to the server in the "protocolVersion" field. -Giving the "major" version of the requested protocol version will make the server -use the latest minor version of that protocol. Use this if you do not explicitly -need to depend on a specific minor version. - -Protocol version 1.0 requires the following attributes to be set: - - * "sourceDirectory" with a path to the sources - * "buildDirectory" with a path to the build directory - * "generator" with the generator name - * "extraGenerator" (optional!) with the extra generator to be used - * "platform" with the generator platform (if supported by the generator) - * "toolset" with the generator toolset (if supported by the generator) - -Protocol version 1.2 makes all but the build directory optional, provided -there is a valid cache in the build directory that contains all the other -information already. - -Example:: - - [== "CMake Server" ==[ - {"cookie":"zimtstern","type":"handshake","protocolVersion":{"major":0}, - "sourceDirectory":"/home/code/cmake", "buildDirectory":"/tmp/testbuild", - "generator":"Ninja"} - ]== "CMake Server" ==] - -which will result in a response type "reply":: - - [== "CMake Server" ==[ - {"cookie":"zimtstern","inReplyTo":"handshake","type":"reply"} - ]== "CMake Server" ==] - -indicating that the server is ready for action. - - -Type "globalSettings" -^^^^^^^^^^^^^^^^^^^^^ - -This request can be sent after the initial handshake. It will return a -JSON structure with information on cmake state. - -Example:: - - [== "CMake Server" ==[ - {"type":"globalSettings"} - ]== "CMake Server" ==] - -which will result in a response type "reply":: - - [== "CMake Server" ==[ - { - "buildDirectory": "/tmp/test-build", - "capabilities": { - "generators": [ - { - "extraGenerators": [], - "name": "Watcom WMake", - "platformSupport": false, - "toolsetSupport": false - }, - <...> - ], - "serverMode": false, - "version": { - "isDirty": false, - "major": 3, - "minor": 6, - "patch": 20160830, - "string": "3.6.20160830-gd6abad", - "suffix": "gd6abad" - } - }, - "checkSystemVars": false, - "cookie": "", - "extraGenerator": "", - "generator": "Ninja", - "debugOutput": false, - "inReplyTo": "globalSettings", - "sourceDirectory": "/home/code/cmake", - "trace": false, - "traceExpand": false, - "type": "reply", - "warnUninitialized": false, - "warnUnused": false, - "warnUnusedCli": true - } - ]== "CMake Server" ==] - - -Type "setGlobalSettings" -^^^^^^^^^^^^^^^^^^^^^^^^ - -This request can be sent to change the global settings attributes. Unknown -attributes are going to be ignored. Read-only attributes reported by -"globalSettings" are all capabilities, buildDirectory, generator, -extraGenerator and sourceDirectory. Any attempt to set these will be ignored, -too. - -All other settings will be changed. - -The server will respond with an empty reply message or an error. - -Example:: - - [== "CMake Server" ==[ - {"type":"setGlobalSettings","debugOutput":true} - ]== "CMake Server" ==] - -CMake will reply to this with:: - - [== "CMake Server" ==[ - {"inReplyTo":"setGlobalSettings","type":"reply"} - ]== "CMake Server" ==] - - -Type "configure" -^^^^^^^^^^^^^^^^ - -This request will configure a project for build. - -To configure a build directory already containing cmake files, it is enough to -set "buildDirectory" via "setGlobalSettings". To create a fresh build directory -you also need to set "currentGenerator" and "sourceDirectory" via "setGlobalSettings" -in addition to "buildDirectory". - -You may a list of strings to "configure" via the "cacheArguments" key. These -strings will be interpreted similar to command line arguments related to -cache handling that are passed to the cmake command line client. - -Example:: - - [== "CMake Server" ==[ - {"type":"configure", "cacheArguments":["-Dsomething=else"]} - ]== "CMake Server" ==] - -CMake will reply like this (after reporting progress for some time):: - - [== "CMake Server" ==[ - {"cookie":"","inReplyTo":"configure","type":"reply"} - ]== "CMake Server" ==] - - -Type "compute" -^^^^^^^^^^^^^^ - -This request will generate build system files in the build directory and -is only available after a project was successfully "configure"d. - -Example:: - - [== "CMake Server" ==[ - {"type":"compute"} - ]== "CMake Server" ==] - -CMake will reply (after reporting progress information):: - - [== "CMake Server" ==[ - {"cookie":"","inReplyTo":"compute","type":"reply"} - ]== "CMake Server" ==] - - -Type "codemodel" -^^^^^^^^^^^^^^^^ - -The "codemodel" request can be used after a project was "compute"d successfully. - -It will list the complete project structure as it is known to cmake. - -The reply will contain a key "configurations", which will contain a list of -configuration objects. Configuration objects are used to destinquish between -different configurations the build directory might have enabled. While most -generators only support one configuration, others might support several. - -Each configuration object can have the following keys: - -"name" - contains the name of the configuration. The name may be empty. -"projects" - contains a list of project objects, one for each build project. - -Project objects define one (sub-)project defined in the cmake build system. - -Each project object can have the following keys: - -"name" - contains the (sub-)projects name. -"minimumCMakeVersion" - contains the minimum cmake version allowed for this project, null if the - project doesn't specify one. -"hasInstallRule" - true if the project contains any install rules, false otherwise. -"sourceDirectory" - contains the current source directory -"buildDirectory" - contains the current build directory. -"targets" - contains a list of build system target objects. - -Target objects define individual build targets for a certain configuration. - -Each target object can have the following keys: - -"name" - contains the name of the target. -"type" - defines the type of build of the target. Possible values are - "STATIC_LIBRARY", "MODULE_LIBRARY", "SHARED_LIBRARY", "OBJECT_LIBRARY", - "EXECUTABLE", "UTILITY" and "INTERFACE_LIBRARY". -"fullName" - contains the full name of the build result (incl. extensions, etc.). -"sourceDirectory" - contains the current source directory. -"buildDirectory" - contains the current build directory. -"isGeneratorProvided" - true if the target is auto-created by a generator, false otherwise -"hasInstallRule" - true if the target contains any install rules, false otherwise. -"installPaths" - full path to the destination directories defined by target install rules. -"artifacts" - with a list of build artifacts. The list is sorted with the most - important artifacts first (e.g. a .DLL file is listed before a - .PDB file on windows). -"linkerLanguage" - contains the language of the linker used to produce the artifact. -"linkLibraries" - with a list of libraries to link to. This value is encoded in the - system's native shell format. -"linkFlags" - with a list of flags to pass to the linker. This value is encoded in - the system's native shell format. -"linkLanguageFlags" - with the flags for a compiler using the linkerLanguage. This value is - encoded in the system's native shell format. -"frameworkPath" - with the framework path (on Apple computers). This value is encoded - in the system's native shell format. -"linkPath" - with the link path. This value is encoded in the system's native shell - format. -"sysroot" - with the sysroot path. -"fileGroups" - contains the source files making up the target. - -FileGroups are used to group sources using similar settings together. - -Each fileGroup object may contain the following keys: - -"language" - contains the programming language used by all files in the group. -"compileFlags" - with a string containing all the flags passed to the compiler - when building any of the files in this group. This value is encoded in - the system's native shell format. -"includePath" - with a list of include paths. Each include path is an object - containing a "path" with the actual include path and "isSystem" with a bool - value informing whether this is a normal include or a system include. This - value is encoded in the system's native shell format. -"defines" - with a list of defines in the form "SOMEVALUE" or "SOMEVALUE=42". This - value is encoded in the system's native shell format. -"sources" - with a list of source files. - -All file paths in the fileGroup are either absolute or relative to the -sourceDirectory of the target. - -Example:: - - [== "CMake Server" ==[ - {"type":"codemodel"} - ]== "CMake Server" ==] - -CMake will reply:: - - [== "CMake Server" ==[ - { - "configurations": [ - { - "name": "", - "projects": [ - { - "buildDirectory": "/tmp/build/Source/CursesDialog/form", - "name": "CMAKE_FORM", - "sourceDirectory": "/home/code/src/cmake/Source/CursesDialog/form", - "targets": [ - { - "artifacts": [ "/tmp/build/Source/CursesDialog/form/libcmForm.a" ], - "buildDirectory": "/tmp/build/Source/CursesDialog/form", - "fileGroups": [ - { - "compileFlags": " -std=gnu11", - "defines": [ "CURL_STATICLIB", "LIBARCHIVE_STATIC" ], - "includePath": [ { "path": "/tmp/build/Utilities" }, <...> ], - "isGenerated": false, - "language": "C", - "sources": [ "fld_arg.c", <...> ] - } - ], - "fullName": "libcmForm.a", - "linkerLanguage": "C", - "name": "cmForm", - "sourceDirectory": "/home/code/src/cmake/Source/CursesDialog/form", - "type": "STATIC_LIBRARY" - } - ] - }, - <...> - ] - } - ], - "cookie": "", - "inReplyTo": "codemodel", - "type": "reply" - } - ]== "CMake Server" ==] - - -Type "ctestInfo" -^^^^^^^^^^^^^^^^ - -The "ctestInfo" request can be used after a project was "compute"d successfully. - -It will list the complete project test structure as it is known to cmake. - -The reply will contain a key "configurations", which will contain a list of -configuration objects. Configuration objects are used to destinquish between -different configurations the build directory might have enabled. While most -generators only support one configuration, others might support several. - -Each configuration object can have the following keys: - -"name" - contains the name of the configuration. The name may be empty. -"projects" - contains a list of project objects, one for each build project. - -Project objects define one (sub-)project defined in the cmake build system. - -Each project object can have the following keys: - -"name" - contains the (sub-)projects name. -"ctestInfo" - contains a list of test objects. - -Each test object can have the following keys: - -"ctestName" - contains the name of the test. -"ctestCommand" - contains the test command. -"properties" - contains a list of test property objects. - -Each test property object can have the following keys: - -"key" - contains the test property key. -"value" - contains the test property value. - - -Type "cmakeInputs" -^^^^^^^^^^^^^^^^^^ - -The "cmakeInputs" requests will report files used by CMake as part -of the build system itself. - -This request is only available after a project was successfully -"configure"d. - -Example:: - - [== "CMake Server" ==[ - {"type":"cmakeInputs"} - ]== "CMake Server" ==] - -CMake will reply with the following information:: - - [== "CMake Server" ==[ - {"buildFiles": - [ - {"isCMake":true,"isTemporary":false,"sources":["/usr/lib/cmake/...", ... ]}, - {"isCMake":false,"isTemporary":false,"sources":["CMakeLists.txt", ...]}, - {"isCMake":false,"isTemporary":true,"sources":["/tmp/build/CMakeFiles/...", ...]} - ], - "cmakeRootDirectory":"/usr/lib/cmake", - "sourceDirectory":"/home/code/src/cmake", - "cookie":"", - "inReplyTo":"cmakeInputs", - "type":"reply" - } - ]== "CMake Server" ==] - -All file names are either relative to the top level source directory or -absolute. - -The list of files which "isCMake" set to true are part of the cmake installation. - -The list of files witch "isTemporary" set to true are part of the build directory -and will not survive the build directory getting cleaned out. - - -Type "cache" -^^^^^^^^^^^^ - -The "cache" request will list the cached configuration values. - -Example:: - - [== "CMake Server" ==[ - {"type":"cache"} - ]== "CMake Server" ==] - -CMake will respond with the following output:: - - [== "CMake Server" ==[ - { - "cookie":"","inReplyTo":"cache","type":"reply", - "cache": - [ - { - "key":"SOMEVALUE", - "properties": - { - "ADVANCED":"1", - "HELPSTRING":"This is not helpful" - } - "type":"STRING", - "value":"TEST"} - ] - } - ]== "CMake Server" ==] - -The output can be limited to a list of keys by passing an array of key names -to the "keys" optional field of the "cache" request. - - -Type "fileSystemWatchers" -^^^^^^^^^^^^^^^^^^^^^^^^^ - -The server can watch the filesystem for changes. The "fileSystemWatchers" -command will report on the files and directories watched. - -Example:: - - [== "CMake Server" ==[ - {"type":"fileSystemWatchers"} - ]== "CMake Server" ==] - -CMake will respond with the following output:: - - [== "CMake Server" ==[ - { - "cookie":"","inReplyTo":"fileSystemWatchers","type":"reply", - "watchedFiles": [ "/absolute/path" ], - "watchedDirectories": [ "/absolute" ] - } - ]== "CMake Server" ==] +The :manual:`cmake(1)` server mode has been removed since CMake 3.20. +Clients should use the :manual:`cmake-file-api(7)` instead. |