[PATCH v3] debianize: set appropriate Standards-Version for each debian suite

["srinuvasan.a via isar-users" <isar-users@googlegroups.com>]

From: srinuvasan <srinuvasan.a@siemens.com>

The Standards-Version field in debian/control declares the Debian Policy
version that the package complies with. Currently, the custom source packages
use a hard-coded Standards-Version: 3.9.6, which is obsolete and does not align
with the policies of newer Debian releases

Update the packaging to set the correct Standards-Version dynamically based on
the target Debian suite, ensuring compliance with the appropriate Debian Policy
version for each release.

Debian Policy evolves over time, newer versions may add, remove, or deprecate
control fields and packaging behaviors. Using an outdated Standards-Version
can miss required or recommended fields, leading to QA or functional issues.

Examples:
  - Rules-Requires-Root (Policy 4.1.0): declares if root privileges are needed
    during debian/rules execution, improves reproducibility and isolation.
  - Homepage (Policy 3.9.3): provides upstream project link for better metadata.

Older Standards-Version(Policy 3.9.6) may trigger lintian warnings such as:
  W: source: missing-rules-requires-root-field
  W: source: missing-homepage-field

Keeping Standards-Version current ensures clean builds, QA compliance,
and future compatibility.

Signed-off-by: srinuvasan <srinuvasan.a@siemens.com>
---
 RECIPE-API-CHANGELOG.md        |  7 +++++++
 meta/classes/debianize.bbclass | 14 ++++++++++++--
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/RECIPE-API-CHANGELOG.md b/RECIPE-API-CHANGELOG.md
index cf04fa5c..bb5f9b9c 100644
--- a/RECIPE-API-CHANGELOG.md
+++ b/RECIPE-API-CHANGELOG.md
@@ -242,6 +242,13 @@ consumption by imaging classes.
 Additional build dependencies of auto-debianized packages can now be defined
 by setting DEBIAN_BUILD_DEPENDS.
 
+### Add STANDARDS_VERSION as a deb_debianize parameter
+
+By default, the Standards-Version field in the debian/control file is automatically
+set based on the corresponding Debian suite.
+If you need to override this default value, you can do so by defining
+the STANDARDS_VERSION variable in your recipe.
+
 ### Separation of ${S} and ${D} in dpkg-raw
 
 ${S} can now be used for checking out sources without being linked implicitly
diff --git a/meta/classes/debianize.bbclass b/meta/classes/debianize.bbclass
index 1f54e8f9..2fad991a 100644
--- a/meta/classes/debianize.bbclass
+++ b/meta/classes/debianize.bbclass
@@ -80,14 +80,24 @@ deb_create_control[vardeps] += "DEBIANIZE_BUILD_DEPENDS \
                                 DEBIAN_BREAKS \
                                 DEBIAN_BUILT_USING \
                                 DEBIAN_CONFLICTS \
-                                DEBIAN_RULES_REQUIRES_ROOT"
+                                DEBIAN_RULES_REQUIRES_ROOT \
+                                STANDARDS_VERSION"
 deb_create_control() {
 	# Add Source section
+	if [ -z "${STANDARDS_VERSION}" ]; then
+		case "${BASE_DISTRO_CODENAME}" in
+			buster)   STANDARDS_VERSION="4.3.0" ;;
+			bullseye) STANDARDS_VERSION="4.5.1" ;;
+			bookworm) STANDARDS_VERSION="4.6.2" ;;
+			trixie|sid|*) STANDARDS_VERSION="4.7.2" ;;
+		esac
+	fi
+
 	cat << EOF > ${S}/debian/control
 Source: ${BPN}
 Section: ${@ deb_list_beautify(d, 'DEBIAN_SECTION')}
 Priority: optional
-Standards-Version: 3.9.6
+Standards-Version: ${STANDARDS_VERSION}
 Maintainer: ${MAINTAINER}
 Build-Depends: ${@ deb_list_beautify(d, 'DEBIANIZE_BUILD_DEPENDS')}
 EOF
-- 
2.39.5

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