package_rpm: Allow compression mode override

Commit 4a4d5f78a6962dda5f63e9891825c80a8a87bf66 ("package_rpm: use zstd
instead of xz") changed the rpm package compressor from 'xz' to 'zstd'
which results in decompression failure with BusyBox-provided 'rpm2cpio'
applet and 'rpm' applet when given the '-i' (Install package) option:

  rpm2cpio: no gzip/bzip2/xz magic

Introduce a variable which makes it possible to use a different
compression mode, making it possible to override the default value for
example like

  RPMBUILD_COMPMODE = "${@'w6T%d.xzdio' % int(d.getVar('XZ_THREADS'))}"

to enable rpm decompression without including the full rpm package in
the resulting root filesystem.

Signed-off-by: Niko Mauno <niko.mauno@vaisala.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/classes-global/package_rpm.bbclass b/meta/classes-global/package_rpm.bbclass
index 246106ea4fbc856d598b60716c27c855d181c495..5d35962affeb390c463477f516718449a318df1c 100644 (file)
--- a/meta/classes-global/package_rpm.bbclass
+++ b/meta/classes-global/package_rpm.bbclass
@@ -10,6 +10,7 @@ IMAGE_PKGTYPE ?= "rpm"
 
 RPM = "rpm"
 RPMBUILD = "rpmbuild"
+RPMBUILD_COMPMODE ?= "${@'w19T%d.zstdio' % int(d.getVar('ZSTD_THREADS'))}"
 
 PKGWRITEDIRRPM = "${WORKDIR}/deploy-rpms"
 
@@ -659,6 +660,7 @@ python do_package_rpm () {
 
     # Setup the rpmbuild arguments...
     rpmbuild = d.getVar('RPMBUILD')
+    rpmbuild_compmode = d.getVar('RPMBUILD_COMPMODE')
 
     # Too many places in dnf stack assume that arch-independent packages are "noarch".
     # Let's not fight against this.
@@ -682,8 +684,8 @@ python do_package_rpm () {
     cmd = cmd + " --define '_use_internal_dependency_generator 0'"
     cmd = cmd + " --define '_binaries_in_noarch_packages_terminate_build 0'"
     cmd = cmd + " --define '_build_id_links none'"
-    cmd = cmd + " --define '_binary_payload w19T%d.zstdio'" % int(d.getVar("ZSTD_THREADS"))
-    cmd = cmd + " --define '_source_payload w19T%d.zstdio'" % int(d.getVar("ZSTD_THREADS"))
+    cmd = cmd + " --define '_source_payload %s'" % rpmbuild_compmode
+    cmd = cmd + " --define '_binary_payload %s'" % rpmbuild_compmode
     cmd = cmd + " --define 'clamp_mtime_to_source_date_epoch 1'"
     cmd = cmd + " --define 'use_source_date_epoch_as_buildtime 1'"
     cmd = cmd + " --define '_buildhost reproducible'"