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classes: add devupstream class 

This class lets you use BBCLASSEXTEND to add a variant of the recipe that
fetches from an alternative URI (such as git:) instead of a tarball.

For example:

 BBCLASSEXTEND = "devupstream:target"
 SRC_URI_class-devupstream = "git://git.example.com/example"
 SRCREV_class-devupstream = "abcd1234"

This variant will have DEFAULT_PREFERENCE set to -1 so it needs to be selected
to be used, and any development-specific tweaks can be done with the
class-devupstream override, for example:

 DEPENDS_append_class-devupstream = " gperf-native"

 do_configure_prepend_class-devupstream() {
    touch ${S}/README
 }

It currently only supports creating a development variant of the target recipe,
not native or nativesdk.  The BBCLASSEXTEND syntax (devupstream:target) was
chosen so that support for native and nativesdk can be added at a later date.

Support for other version control systems such as subversion is limited, as
bitbake's automatic fetch dependencies on for example subversion-native are not
generated.

[ YOCTO #10215 ]

(From OE-Core rev: c48ef2d7c7198232846f36a975c673cc57f4a090)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Ross Burton 2016-11-11 17:51:17 +00:00 committed by Richard Purdie
parent 94790a8254
commit ca5059e638
1 changed files with 48 additions and 0 deletions
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# Class for use in BBCLASSEXTEND to make it easier to have a single recipe that
# can build both stable tarballs and snapshots from upstream source
# repoistories.
#
# Usage:
# BBCLASSEXTEND = "devupstream:target"
# SRC_URI_class-devupstream = "git://git.example.com/example"
# SRCREV_class-devupstream = "abcdef"
#
# If the first entry in SRC_URI is a git: URL then S is rewritten to
# WORKDIR/git.
#
# There are a few caveats that remain to be solved:
# - You can't build native or nativesdk recipes using for example
# devupstream:native, you can only build target recipes.
# - If the fetcher requires native tools (such as subversion-native) then
# bitbake won't be able to add them automatically.
CLASSOVERRIDE .= ":class-devupstream"
python devupstream_virtclass_handler () {
# Do nothing if this is inherited, as it's for BBCLASSEXTEND
if "devupstream" not in (d.getVar('BBCLASSEXTEND') or ""):
bb.error("Don't inherit devupstream, use BBCLASSEXTEND")
return
variant = d.getVar("BBEXTENDVARIANT")
if variant not in ("target"):
bb.error("Pass the variant when using devupstream, for example devupstream:target")
return
# Develpment releases are never preferred by default
d.setVar("DEFAULT_PREFERENCE", "-1")
uri = bb.fetch2.URI(d.getVar("SRC_URI").split()[0])
if uri.scheme == "git":
d.setVar("S", "${WORKDIR}/git")
# Modify the PV if the recipe hasn't already overridden it
pv = d.getVar("PV")
proto_marker = "+" + uri.scheme
if proto_marker not in pv:
d.setVar("PV", pv + proto_marker + "${SRCPV}")
}
addhandler devupstream_virtclass_handler
devupstream_virtclass_handler[eventmask] = "bb.event.RecipePreFinalise"