2018-06-23 17:44:43 +00:00
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Package development
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###################
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Gluon packages are OpenWrt packages and follow the same rules described at https://openwrt.org/docs/guide-developer/packages.
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Gluon package makefiles
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=======================
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As many packages share the same or a similar structure, Gluon provides a ``package/gluon.mk`` that
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can be included for common definitions. This file replaces OpenWrt's ``$(INCLUDE_DIR)/package.mk``;
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it is usually included as ``include ../gluon.mk`` from Gluon core packages, or as
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2019-06-29 21:41:07 +00:00
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``include $(TOPDIR)/../package/gluon.mk`` from feeds.
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2018-06-23 17:44:43 +00:00
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Provided macros
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***************
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* *GluonBuildI18N* (arguments: *<source directory>*)
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Converts the *.po* files for all enabled languages from the given source directory to
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the binary *.lmo* format and stores them in ``$(PKG_BUILD_DIR)/i18n``.
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* *GluonInstallI18N*
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Install *.lmo* files from ``$(PKG_BUILD_DIR)/i18n`` to ``/lib/gluon/web/i18n`` in the
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package install directory.
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* *GluonSrcDiet* (arguments: *<source directory>*, *<destination directory>*)
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Copies a directory tree, processing all files in it using *LuaSrcDiet*. The directory
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tree should only contain Lua files.
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* *GluonCheckSite* (arguments: *<source file>*)
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Intended to be used in a package postinst script. It will use the passed Lua
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snippet to verify package-specific site configuration.
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* *BuildPackageGluon* (replaces *BuildPackage*)
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Extends the *Package/<name>* definition with common defaults, sets the package
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install script to the common *Gluon/Build/Install*, and automatically creates
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a postinst script using *GluonCheckSite* if a ``check_site.lua`` is found in the
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package directory.
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Default build steps
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*******************
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These defaults greatly reduce the boilerplate in each package, but they can also
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be confusing because of the many implicit behaviors depending on files in the
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package directory. If any part of *Gluon/Build/Compile* or *Gluon/Build/Install*
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does not work as intended for a package, the compile and install steps can
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always be replaced or extended.
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*Build/Compile* is set to *Gluon/Build/Compile* by default, which will
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* run OpenWrt standard default commands (*Build/Compile/Default*) if a ``src/Makefile``
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or ``src/CMakeLists.txt`` is found
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* run *GluonSrcDiet* on all files in the ``luasrc`` directory
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* run *GluonBuildI18N* if a ``i18n`` directory is found
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*Package/<name>* defaults to *Gluon/Build/Install* for packages defined using
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*BuildPackageGluon*, which will
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* copy all files from ``$(PKG_INSTALL_DIR)`` into the package if ``$(PKG_INSTALL)`` is 1
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* copy all files from ``files`` into the package
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* copy all Lua files built from ``luasrc`` into the package
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* installs ``$(PKG_BUILD_DIR)/respondd.so`` to ``/usr/lib/respondd/$(PKG_NAME).so`` if ``src/respondd.c`` exists
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* installs compiled i18n *.lmo* files
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Feature flags
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=============
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Feature flags provide a convenient way to define package selections without
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making it necessary to list each package explicitly.
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The main feature flag definition file is ``package/features``, but each package
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2019-03-10 19:15:25 +00:00
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feed can provide additional definitions in a file called ``features`` at the root
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2018-06-23 17:44:43 +00:00
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of the feed repository.
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Each flag *$flag* without any explicit definition will simply include the package
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with the name *gluon-$flag* by default. The feature definition file can modify
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the package selection in two ways:
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* The *nodefault* function suppresses default of including the *gluon-$flag*
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package
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* The *packages* function adds a list of packages (or removes, when package
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names are prepended with minus signs) when a given logical expression
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is satisfied
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Example::
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nodefault 'web-wizard'
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packages 'web-wizard' \
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'gluon-config-mode-hostname' \
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'gluon-config-mode-geo-location' \
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'gluon-config-mode-contact-info'
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packages 'web-wizard & (mesh-vpn-fastd | mesh-vpn-tunneldigger)' \
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'gluon-config-mode-mesh-vpn'
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This will
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* disable the inclusion of a (non-existent) package called *gluon-web-wizard*
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* enable three config mode packages when the *web-wizard* feature is enabled
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* enable *gluon-config-mode-mesh-vpn* when both *web-wizard* and one
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of *mesh-vpn-fastd* and *mesh-vpn-tunneldigger* are enabled
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Supported syntax elements of logical expressions are:
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* \& (and)
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* \| (or)
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* \! (not)
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* parentheses
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