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github.mk
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github.mk
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# This file is part of MXE. See LICENSE.md for licensing information.
# Standardise GitHub downloads and updates
# Download API has two forms:
# Archive:
# url = <owner>/<repo>/archive/<ref>.tar.gz
# dir = <repo>-<ref>
# if <ref> starts with a single `v`, it is removed from dir
#
# Tarball:
# url = <owner>/<repo>/tarball/<ref>/output-file.tar.gz
# dir = <owner>-<repo>-<short sha>
#
# TODO: also third api - `releases` see libass.mk
# grep -l 'MXE_GET_GITHUB\|api.github.com\|github.com.*archive' src/*.mk | xargs grep -L 'GH_CONF'
#
# Filename doesn't matter as we stream the url to a name of our choosing.
#
# The archive API could be used for all packages, however, if the reference
# is any sort of SHA, the full SHA is used for the directory. We could `cd`
# into it without knowing the SHA beforehand, but the directory length would
# be comical in logs etc.
#
# The tarball API accepts references to commits or tags, always using the
# short SHA as the directory. In this case, tag tracking packages would have
# to store the SHA (see #1002). However, this only works for lightweight
# tags, not annotated tags that most projects use for releases.
#
# In summary, we have to use both.
# The tarball API determines the short SHA length used in the directory name.
# Chances of a collision on a "given" commit seem to decrease as the chance
# of "any" collision increases. If that changes in the future, `make update`
# will fix it.
# Currently (2015-12) the API sets the short SHA length to:
GITHUB_SHA_LENGTH := 7
# Packages must set the following metadata:
# Track branch - Tarball API
# GH_CONF := owner/repo/branch
# updates will use the last commit from the specified branch as
# a version string and bypass `sort -V`
#
# Track tags - Archive API
# GH_CONF := owner/repo, tag prefix, tag suffix, tag filter-out, version separator
# updates will construct a version number based on:
# <tag prefix><s/<version sep>/./version><tag suffix>
# common tag filtering is applied with `grep -v`:
GITHUB_TAG_FILTER := alpha\|beta\|rc
# More complex filters can fall back to `MXE_GET_GH_TAGS` which returns
# a list for post-processing.
# ...and finally, auto-configure packages based on above metadata:
# - `eval` these snippets during PKG_RULE loop (where PKG is in scope).
# - `call` or `eval` from package makefiles requires complex quoting
# and looks out of place.
# - don't redefine manually set standard variables (FILE, SUBDIR, URL, UPDATE)
GH_OWNER = $(word 1,$(subst /,$(space),$(word 1,$(subst $(comma),$(space),$($(PKG)_GH_CONF)))))
GH_REPO = $(word 2,$(subst /,$(space),$(word 1,$(subst $(comma),$(space),$($(PKG)_GH_CONF)))))
GH_BRANCH = $(word 3,$(subst /,$(space),$(word 1,$(subst $(comma),$(space),$($(PKG)_GH_CONF)))))
GH_TAG_VARS = $(call rest,$(subst $(comma),$(space)$(__gmsl_aa_magic),$(subst $(space),,$($(PKG)_GH_CONF))))
GH_TAG_PREFIX = $(subst $(__gmsl_aa_magic),,$(word 1,$(GH_TAG_VARS)))
GH_TAG_SUFFIX = $(subst $(__gmsl_aa_magic),,$(word 2,$(GH_TAG_VARS)))
GH_TAG_FILTER = $(subst $(__gmsl_aa_magic),,$(word 3,$(GH_TAG_VARS)))
GH_VERSION_SEP = $(subst $(__gmsl_aa_magic),,$(word 4,$(GH_TAG_VARS)))
define MXE_SETUP_GITHUB
$(PKG)_GH_OWNER := $(GH_OWNER)
$(PKG)_GH_REPO := $(GH_REPO)
$(PKG)_BRANCH := $(GH_BRANCH)
$(PKG)_TAG_VARS := $(GH_TAG_VARS)
$(PKG)_TAG_PREFIX := $(GH_TAG_PREFIX)
$(PKG)_TAG_SUFFIX := $(GH_TAG_SUFFIX)
$(PKG)_TAG_FILTER := $(GH_TAG_FILTER)
$(PKG)_VERSION_SEP := $(or $(GH_VERSION_SEP),.)
$(PKG)_FILE := $(or $($(PKG)_FILE),$(PKG)-$$($$(PKG)_TAG_PREFIX)$($(PKG)_VERSION)$$($$(PKG)_TAG_SUFFIX).tar.gz)
$(if $(and $(GH_BRANCH),$(GH_TAG_VARS)),\
$(error $(newline) $(PKG) specifies both branch and tag variables $(newline)))
$(if $(GH_BRANCH),$(value MXE_SETUP_GITHUB_BRANCH),$(value MXE_SETUP_GITHUB_TAG))
endef
define MXE_SETUP_GITHUB_BRANCH
$(PKG)_SUBDIR := $(or $($(PKG)_SUBDIR),$($(PKG)_GH_OWNER)-$($(PKG)_GH_REPO)-$($(PKG)_VERSION))
$(PKG)_URL := $(or $($(PKG)_URL),https://github.com/$($(PKG)_GH_OWNER)/$($(PKG)_GH_REPO)/tarball/$($(PKG)_VERSION)/$($(PKG)_FILE))
$(PKG)_UPDATE := $(or $($(PKG)_UPDATE),$(call MXE_GET_GH_SHA,$($(PKG)_GH_OWNER)/$($(PKG)_GH_REPO),$($(PKG)_BRANCH)))
endef
define MXE_SETUP_GITHUB_TAG
$(PKG)_SUBDIR := $(or $($(PKG)_SUBDIR),$($(PKG)_GH_REPO)-$(if $(call sne,v,$($(PKG)_TAG_PREFIX)),$($(PKG)_TAG_PREFIX))$(subst .,$($(PKG)_VERSION_SEP),$($(PKG)_VERSION))$($(PKG)_TAG_SUFFIX))
$(PKG)_TAR_GZ := $(or $($(PKG)_TAR_GZ),$($(PKG)_GH_REPO)-$($(PKG)_TAG_PREFIX)$(subst .,$($(PKG)_VERSION_SEP),$($(PKG)_VERSION))$($(PKG)_TAG_SUFFIX))
$(PKG)_URL := $(or $($(PKG)_URL),https://github.com/$($(PKG)_GH_OWNER)/$($(PKG)_GH_REPO)/archive/$(subst $($(PKG)_GH_REPO)-,,$($(PKG)_TAR_GZ)).tar.gz)
$(PKG)_UPDATE := $(or $($(PKG)_UPDATE),$(call MXE_GET_GH_TAG,$($(PKG)_GH_OWNER)/$($(PKG)_GH_REPO),$($(PKG)_TAG_PREFIX),$($(PKG)_TAG_SUFFIX),$(or $($(PKG)_TAG_FILTER),$(GITHUB_TAG_FILTER)),$($(PKG)_VERSION_SEP)))
endef
# called with owner/repo,branch
define MXE_GET_GH_SHA
$(WGET) -q -O- 'https://api.github.com/repos/$(strip $(1))/git/refs/heads/$(strip $(2))' \
| $(SED) -n 's#.*"sha": "\([^"]\{$(GITHUB_SHA_LENGTH)\}\).*#\1#p' \
| head -1
endef
# called with owner/repo
define MXE_GET_GH_TAGS
$(WGET) -q -O- 'https://api.github.com/repos/$(strip $(1))/git/refs/tags/' \
| $(SED) -n 's#.*"ref": "refs/tags/\([^"]*\).*#\1#p'
endef
# called with owner/repo, tag prefix, tag suffix, filter-out, version sep
define MXE_GET_GH_TAG
$(MXE_GET_GH_TAGS) \
| $(if $(4),grep -v '$(strip $(4))') \
| $(SED) -n 's,^$(strip $(2))\([^"]*\)$(strip $(3))$$,\1,p' \
| tr '$(strip $(5))' '.' \
| $(SORT) -V
| tail -1
endef
GITHUB_PKGS = $(patsubst %_GH_CONF,%,$(filter %_GH_CONF,$(.VARIABLES)))
# check-gh-conf : test updates and source directory
# check-gh-conf-dl: removes downloads and tests above
# a test of many package updates may hit rate limit of 60/hr
# https://developer.github.com/v3/#rate-limiting
.PHONY: check-gh-conf check-gh-conf-%
check-gh-conf-dl: REMOVE_DOWNLOAD = true
check-gh-conf-dl: MXE_NO_BACKUP_DL = true
check-gh-conf-dl: check-gh-conf
check-gh-conf-pkg-%: check-update-package-% download-only-%
@$(PRINTF_FMT) '[prep-src]' '$(*)' | $(RTRIM)
@($(MAKE) -f '$(MAKEFILE)' 'prepare-pkg-source-$(*)') > /dev/null
@rm -rf '$(call TMP_DIR,$(*))'
# secondexpansion here since this file is included before pkg makefiles
.SECONDEXPANSION:
check-gh-conf: $$(addprefix check-gh-conf-pkg-,$$(GITHUB_PKGS))
github-pkgs: $$(GITHUB_PKGS)