1 files changed, 29 insertions, 0 deletions
diff --git a/scripts/package-build/linux-kernel/common.sh b/scripts/package-build/linux-kernel/common.sh
new file mode 100644
index 00000000..ad9689fa
--- /dev/null
+++ b/scripts/package-build/linux-kernel/common.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+# Shared helpers for scripts/package-build/linux-kernel/build-*.sh.
+# Source this file (". ${CWD}/common.sh"); it defines functions only.
+
+# require_amd64 <component-name>
+# Soft-exits (status 0) if not running on amd64.
+require_amd64() {
+    if ! dpkg-architecture -iamd64; then
+        echo "${1} is only buildable on amd64 platforms"
+        exit 0
+    fi
+}
+
+# debian_version <raw-version-string>
+# Sanitizes a git-describe-style string (e.g. "5.3-5-g5aeee02") into a
+# version safe for a "3.0 (native)" Debian source package:
+#  - hyphens are replaced with "+", since debuild/dpkg-source treat any
+#    hyphen as "this needs a separate orig tarball" even for native
+#    packages, and reject the build asking for one that doesn't exist.
+#  - the result is prefixed with "0~" if it doesn't start with a digit,
+#    since Debian versions must start with a digit (a bare abbreviated
+#    git hash can start with a letter).
+debian_version() {
+    v=$(echo "$1" | tr -- '-' '+')
+    case "$v" in
+        [0-9]*) echo "$v" ;;
+        *) echo "0~$v" ;;
+    esac
+}