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diff --git a/conf.d/app-templates/README.md b/conf.d/app-templates/README.md new file mode 100644 index 0000000..96dfb3c --- /dev/null +++ b/conf.d/app-templates/README.md @@ -0,0 +1,382 @@ +# AGL CMake template + +Files used to build an application, or binding, project with the +AGL Application Framework. + +To build your AGL project using these templates, you have to install +them within your project and adjust compilation option in `config.cmake`. +For technical reasons, you also have to specify **cmake** target in +sub CMakeLists.txt installed. Make a globbing search to find source files +isn't recommended now to handle project build especially in a multiuser +project because CMake will not be aware of new or removed source files. + +You'll find usage samples here: + +- [helloworld-service](https://github.com/iotbzh/helloworld-service) +- [low-level-can-service](https://gerrit.automotivelinux.org/gerrit/apps/low-level-can-service) +- [high-level-viwi-service](https://github.com/iotbzh/high-level-viwi-service) +- [audio-binding](https://github.com/iotbzh/audio-binding) +- [unicens2-binding](https://github.com/iotbzh/unicens2-binding) + +## Quickstart + +### Initialization + +To use these templates files on your project just install the reference files using +**git submodule** then use `config.cmake` file to configure your project specificities : + +```bash +git submodule add https://gerrit.automotivelinux.org/gerrit/p/apps/app-templates.git conf.d/app-templates +mkdir conf.d/cmake +cp conf.d/app-templates/cmake/config.cmake.sample conf.d/cmake/config.cmake +``` + +Edit the copied config.cmake file to fit your needs. + +Now, create your top CMakeLists.txt file which include `config.cmake` file. + +An example is available in **app-templates** submodule that you can copy and +use: + +```bash +cp conf.d/app-templates/cmake/CMakeLists.txt.sample CMakeLists.txt +``` + +### Create your CMake targets + +For each target part of your project, you need to use ***PROJECT_TARGET_ADD*** +to include this target to your project. + +Using it, make available the cmake variable ***TARGET_NAME*** until the next +***PROJECT_TARGET_ADD*** is invoked with a new target name. + +So, typical usage defining a target is: + +```cmake +PROJECT_TARGET_ADD(SuperExampleName) --> Adding target to your project + +add_executable/add_library(${TARGET_NAME}.... --> defining your target sources + +SET_TARGET_PROPERTIES(${TARGET_NAME} PROPERTIES.... --> fit target properties +for macros usage + +INSTALL(TARGETS ${TARGET_NAME}.... +``` + +### Targets PROPERTIES + +You should set properties on your targets that will be used to package your +apps in a widget file that could be installed on an AGL system. + +Specify what is the type of your targets that you want to be included in the +widget package with the property **LABELS**: + +Choose between: + +- **BINDING**: Shared library that be loaded by the AGL Application Framework +- **BINDINGV2**: Shared library that be loaded by the AGL Application Framework. + This has to be accompagnied with a JSON file named like the *${OUTPUT_NAME}-apidef* of + the target that describe the API with OpenAPI syntax (e.g: *mybinding-apidef*). + Or you can choose the name by setting the *CACHE* cmake variable *OPENAPI_DEF* + (***CAUTION***: setting a CACHE variable is needed, or set a normal variable + with the *PARENT_SCOPE* option to make it visible for the parent scope + where the target is defined) JSON file will be used to generate header file + using `afb-genskel` tool. +- **HTDOCS**: Root directory of a web app. This target has to build its + directory and puts its files in the ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME} +- **DATA**: Resources used by your application. This target has to build its + directory and puts its files in the ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME} +- **EXECUTABLE**: Entry point of your application executed by the AGL + Application Framework + +```cmake +SET_TARGET_PROPERTIES(${TARGET_NAME} + PREFIX "afb-" + LABELS "BINDING" + OUTPUT_NAME "file_output_name") +``` + +> **TIP** you should use the prefix _afb-_ with your **BINDING* targets which +> stand for **Application Framework Binding**. + +## More details: Typical project architecture + +A typical project architecture would be : + +```tree +<project-root-path> +│ +├── conf.d/ +│ ├── autobuild/ +│ │ ├── agl +│ │ │ └── autobuild +│ │ ├── linux +│ │ │ └── autobuild +│ │ └── windows +│ │ └── autobuild +│ ├── app-templates/ +│ │ ├── README.md +│ │ ├── autobuild/ +│ │ │ ├── agl +│ │ │ │ └── autobuild.in +│ │ │ ├── linux +│ │ │ │ └── autobuild.in +│ │ │ └── windows +│ │ │ └── autobuild.in +│ │ ├── cmake/ +│ │ │ ├── config.cmake.sample +│ │ │ ├── export.map +│ │ │ └── macros.cmake +│ │ ├── deb/ +│ │ │ └── config.deb.in +│ │ ├── rpm/ +│ │ │ └── config.spec.in +│ │ └── wgt/ +│ │ ├── config.xml.in +│ │ ├── config.xml.in.sample +│ │ ├── icon-default.png +│ │ ├── icon-html5.png +│ │ ├── icon-native.png +│ │ ├── icon-qml.png +│ │ └── icon-service.png +│ ├── packaging/ +│ │ ├── config.spec +│ │ └── config.deb +│ ├── cmake +│ │ └── config.cmake +│ └── wgt +│ └── config.xml.in +├── <libs> +├── <target> +│ └── <files> +├── <target> +│ └── <file> +└── <target> + └── <files> +``` + +| # | Parent | Description | +| - | -------| ----------- | +| \<root-path\> | - | Path to your project. Hold master CMakeLists.txt and general files of your projects. | +| conf.d | \<root-path\> | Holds needed files to build, install, debug, package an AGL app project | +| app-templates | conf.d | Git submodule to app-templates AGL repository which provides CMake helpers macros library, and build scripts. config.cmake is a copy of config.cmake.sample configured for the projects. SHOULD NOT BE MODIFIED MANUALLY !| +| autobuild | conf.d | Scripts generated from app-templates to build packages the same way for differents platforms.| +| cmake | conf.d | Contains at least config.cmake file modified from the sample provided in app-templates submodule. | +| wgt | conf.d | Contains at least config.xml.in template file modified from the sample provided in app-templates submodule for the needs of project (See config.xml.in.sample file for more details). | +| packaging | conf.d | Contains output files used to build packages. | +| \<libs\> | \<root-path\> | External dependencies libraries. This isn't to be used to include header file but build and link statically specifics libraries. | Library sources files. Can be a decompressed library archive file or project fork. | +| \<target\> | \<root-path\> | A target to build, typically library, executable, etc. | + +### Update app-templates submodule + +You may have some news bug fixes or features available from app-templates +repository that you want. To update your submodule proceed like the following: + +```bash +git submodule update --remote +git commit -s conf.d/app-templates +``` + +This will update the submodule to the HEAD of master branch repository. + +You could just want to update at a specified repository tag or branch or commit +, here are the method to do so: + +```bash +cd conf.d/app-templates +# Choose one of the following depending what you want +git checkout <tag_name> +git checkout --detach <branch_name> +git checkout --detach <commit_id> +# Then commit +cd ../.. +git commit -s conf.d/app-templates +``` + +### Build a widget + +#### config.xml.in file + +To build a widget you need a _config.xml_ file describing what is your apps and +how Application Framework would launch it. This repo provide a simple default +file _config.xml.in_ that should work for simple application without +interactions with others bindings. + +It is recommanded that you use the sample one which is more complete. You can +find it at the same location under the name _config.xml.in.sample_ (stunning +isn't it). Just copy the sample file to your _conf.d/wgt_ directory and name it +_config.xml.in_, then edit it to fit your needs. + +> ***CAUTION*** : The default file is only meant to be use for a +> simple widget app, more complicated ones which needed to export +> their api, or ship several app in one widget need to use the provided +> _config.xml.in.sample_ which had all new Application Framework +> features explained and examples. + +#### Using cmake template macros + +To leverage all cmake templates features, you have to specify ***properties*** +on your targets. Some macros will not works without specifying which is the +target type. + +As the type is not always specified for some custom targets, like an ***HTML5*** +application, macros make the difference using ***LABELS*** property. + +Choose between: + +- **BINDING**: Shared library that be loaded by the AGL Application Framework +- **BINDINGV2**: Shared library that be loaded by the AGL Application Framework. + This has to be accompagnied with a JSON file named like the *${OUTPUT_NAME}-apidef* of + the target that describe the API with OpenAPI syntax (e.g: *mybinding-apidef*). + Or you can choose the name by setting the *CACHE* cmake variable *OPENAPI_DEF* + (***CAUTION***: setting a CACHE variable is needed, or set a normal variable + with the *PARENT_SCOPE* option to make it visible for the parent scope + where the target is defined) JSON file will be used to generate header file + using `afb-genskel` tool. +- **HTDOCS**: Root directory of a web app. This target has to build its + directory and puts its files in the ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME} +- **DATA**: Resources used by your application. This target has to build its + directory and puts its files in the ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME} +- **EXECUTABLE**: Entry point of your application executed by the AGL + Application Framework + +Example: + +```cmake +SET_TARGET_PROPERTIES(${TARGET_NAME} PROPERTIES + LABELS "HTDOCS" + OUTPUT_NAME dist.prod + ) +``` + +If your target output is not named as the ***TARGET_NAME***, you need to specify +***OUTPUT_NAME*** property that will be used by the ***populate_widget*** macro. + +Use the ***populate_widget*** macro as latest statement of your target +definition. Then at the end of your project definition you should use the macro +***build_widget*** that make an archive from the populated widget tree using the +`wgtpkg-pack` Application Framework tools. + +## Macro reference + +### PROJECT_TARGET_ADD + +Typical usage would be to add the target to your project using macro +`PROJECT_TARGET_ADD` with the name of your target as parameter. + +Example: + +```cmake +PROJECT_TARGET_ADD(low-can-demo) +``` + +> ***NOTE***: This will make available the variable `${TARGET_NAME}` +> set with the specificied name. This variable will change at the next call +> to this macros. + +### project_subdirs_add + +This macro will search in all subfolder any `CMakeLists.txt` file. If found then +it will be added to your project. This could be use in an hybrid application by +example where the binding lay in a sub directory. + +Usage : + +```cmake +project_subdirs_add() +``` + +You also can specify a globbing pattern as argument to filter which folders +will be looked for. + +To filter all directories that begin with a number followed by a dash the +anything: + +```cmake +project_subdirs_add("[0-9]-*") +``` + +## Advanced customization + +### Including additionnals cmake files + +Advanced tuning is possible using addionnals cmake files that are included +automatically from some specifics locations. They are included in that order: + +- Project CMake files normaly located in _<project-root-path>/conf.d/app-templates/cmake/cmake.d_ +- Home CMake files located in _$HOME/.config/app-templates/cmake.d_ +- System CMake files located in _/etc/app-templates/cmake.d_ + +CMake files has to be named using the following convention: `XX-common-*.cmake` +or `XX-${PROJECT_NAME}-*.cmake`, where `XX` are numbers, `*` file name +(ie. `99-common-my_customs.cmake`). + +> **NOTE** You need to specify after numbers that indicate include order, to +which project that file applies, if it applies to all project then use keyword +`common`. + +So, saying that you should be aware that every normal cmake variables used at +project level could be overwrited by home or system located cmake files if +variables got the same name. Exceptions are cached variables set using +**CACHE** keyword: + +Example: + +```cmake +set(VARIABLE_NAME 'value string random' CACHE STRING 'docstring') +``` + +### Include customs templated scripts + +As well as for additionnals cmake files you can include your own templated +scripts that will be passed to cmake command `configure_file`. + +Just create your own script to the following directories: + +- Home location in _$HOME/.config/app-templates/scripts_ +- System location in _/etc/app-templates/scripts_ + +Scripts only needs to use the extension `.in` to be parsed and configured by +CMake command. + +## Autobuild script usage + +### Generation + +To be integrated in the Yocto build workflow you have to generate `autobuild` +scripts using _autobuild_ target. + +To generate those scripts proceeds: + +```bash +mkdir -p build +cd build +cmake .. && make autobuild +``` + +You should see _conf.d/autobuild/agl/autobuild_ file now. + +### Available targets + +Here are the available targets available from _autobuild_ scripts: + +- **clean** : clean build directory from object file and targets results. +- **distclean** : delete build directory +- **configure** : generate project Makefile from CMakeLists.txt files. +- **build** : compile all project targets. +- **package** : build and output a wgt package. + +You can specify variables that modify the behavior of compilation using +the following variables: + +- **CONFIGURE_ARGS** : Variable used at **configure** time. +- **BUILD_ARGS** : Variable used at **build** time. +- **DEST** : Directory where to output ***wgt*** file. + +Variable as to be in CMake format. (ie: BUILD_ARGS="-DC_FLAGS='-g -O2'") + +Usage example: + +```bash +./conf.d/autobuild/wgt/autobuild package DEST=/tmp +``` |