[PATCH v3 01/14] dpkg-raw: Respect file permissions defined by recipe if requested

[Jan Kiszka <jan.kiszka@siemens.com>]

From: Jan Kiszka <jan.kiszka@siemens.com>

dh_fixperms overwrites the permissions do_install may have defined. To
avoid that, allow the recipe write to define an exception list via the
PRESERVE_PERMS variable.

Fixes: f301ccb2b5b1 ("meta/dpkg-raw: build raw packages like all others")
CC: Henning Schild <henning.schild@siemens.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 RECIPE-API-CHANGELOG.md       | 7 +++++++
 meta/classes/dpkg-raw.bbclass | 9 ++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/RECIPE-API-CHANGELOG.md b/RECIPE-API-CHANGELOG.md
index 06a01e3..2bc1585 100644
--- a/RECIPE-API-CHANGELOG.md
+++ b/RECIPE-API-CHANGELOG.md
@@ -124,3 +124,10 @@ updated hence recipes using them shouldn't be impacted per se.
 
 These packages depend on a specific kernel. Its identification is now appended
 to the binary package names in the form "-${KERNEL_NAME}".
+
+### PRESERVE_PERMS needed with dpkg-raw for implicit file permission setting
+
+In order to use the same file permissions for an input file to a dpkg-raw
+package on the build machine as well as on the target, its absolute target path
+needs to be listed in the PRESERVE_PERMS variable (space-separated list of
+files). Otherwise, default permissions are used.
diff --git a/meta/classes/dpkg-raw.bbclass b/meta/classes/dpkg-raw.bbclass
index 8d11433..42276e5 100644
--- a/meta/classes/dpkg-raw.bbclass
+++ b/meta/classes/dpkg-raw.bbclass
@@ -53,12 +53,19 @@ Description: ${DESCRIPTION}
 EOF
 }
 
+FIXPERM_EXCLUSIONS = \
+    "${@' '.join(['-X ' + x for x in \
+                  (d.getVar('PRESERVE_PERMS', False) or '').split()])}"
+
 deb_create_rules() {
 	cat << EOF > ${S}/debian/rules
 #!/usr/bin/make -f
+
+override_dh_fixperms:
+	dh_fixperms ${FIXPERM_EXCLUSIONS}
+
 %:
 	dh \$@
-
 EOF
 	chmod +x ${S}/debian/rules
 }
-- 
2.16.4