From 6f75e6e6f66faa7171249e655c7f382d51a1f7a8 Mon Sep 17 00:00:00 2001
From: Mark Wooding <mdw@distorted.org.uk>
Date: Fri, 3 May 2024 22:51:43 +0100
Subject: [PATCH] auto-version.in: Factor out Debian version checking.

Also fixes a bug: we assumed that `debian/changelog' existed if we had a
Git version to check.
---
 auto-version.in | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/auto-version.in b/auto-version.in
index 5e0e59d..59c75c0 100755
--- a/auto-version.in
+++ b/auto-version.in
@@ -70,6 +70,13 @@ fi
 ###--------------------------------------------------------------------------
 ### Main program.
 
+## Get the Debian version, if there is one.
+if [ -f debian/changelog ]; then
+  debver=$(sed -n '/^.*(\(.*\)).*$/ { s::\1:p; q; }' debian/changelog)
+else
+  unset debver
+fi
+
 ## If this is a Git checkout then Git should be able to identify the version.
 ## If there's also a Debian version, and that ends in a `~', then prefix the
 ## Git version with this.  Note that `pkg-config' is not very good, and, in
@@ -78,8 +85,7 @@ fi
 ## version-comparison algorithm which specifies this behaviour, so one must
 ## be careful when choosing `~' prefixes.
 if [ -e .git ] && version=$(git describe --abbrev=4 --dirty=+ 2>/dev/null); then
-  debver=$(sed -n '/^.*(\(.*\)).*$/ { s::\1:p; q; }' debian/changelog)
-  case $debver in *~) version=$debver$version ;; esac
+  case ${debver+t} in t) version=$debver$version ;; esac
   echo "$version"
   exit 0
 fi
@@ -92,10 +98,9 @@ if [ -f RELEASE ]; then
 fi
 
 ## If we're Debianized, then the Debian changelog ought to know.
-if [ -f debian/changelog ]; then
-  sed -n '/^.*(\(.*\)).*$/ { s::\1:p; q; }' debian/changelog
-  exit 0
-fi
+case ${debver+t} in
+  t) echo "$debver"; exit 0 ;;
+esac
 
 ## Otherwise we're screwed.
 echo UNKNOWN
-- 
2.11.0