Use git to automatically create version.h

Adapted from git itself via unifdef. This does not (yet) include
the equivalent automation for the doc build.

1 files changed, 61 insertions, 0 deletions

diff --git a/src/scripts/reversion b/src/scripts/reversion
new file mode 100755
index 000000000..7bc56f620
--- /dev/null
+++ b/src/scripts/reversion
@@ -0,0 +1,61 @@
+#!/bin/sh
+
+# Update Exim's version header file.
+
+# Read version information that was generated by a previous run of
+# this script, or during the release process.
+
+if   [ -f version.sh ]
+then .    version.sh
+elif [ -f ../src/version.sh ]
+then .    ../src/version.sh
+fi
+
+# If this tree is a git working directory, use that to get version information.
+
+if [ -e ../../.git ] || [ "$1" = "release" ]
+then
+	# Modify the output of git describe into separate parts for
+	# the name "exim" and the release and variant versions.
+	# Put a dot in the version number and remove a spurious g.
+	set $(git describe --dirty=-XX --match 'exim-4*' |
+		sed 's|-| |;s|_|.|;s|[-_]| _|;s|-g|-|')
+	# Only update if we need to
+	if [ "$2 $3" != "$EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION" ]
+	then
+		EXIM_RELEASE_VERSION="$2"
+		EXIM_VARIANT_VERSION="$3"
+		rm -f version.h
+	fi
+fi
+
+# If you are maintaining a patched version of Exim, you can either
+# create your own version.sh as part of your release process, or you
+# can modify EXIM_VARIANT_VERSION at this point in this script.
+
+case $EXIM_RELEASE_VERSION in
+'')	echo "*** Your copy of Exim lacks any version information."
+	exit 1
+esac
+
+EXIM_COMPILE_NUMBER=$(expr "${EXIM_COMPILE_NUMBER:-0}" + 1)
+
+echo "$EXIM_COMPILE_NUMBER" >cnumber.h
+
+( echo '# automatically generated file - see ../scripts/reversion'
+  echo EXIM_RELEASE_VERSION='"'"$EXIM_RELEASE_VERSION"'"'
+  echo EXIM_VARIANT_VERSION='"'"$EXIM_VARIANT_VERSION"'"'
+  echo EXIM_COMPILE_NUMBER='"'"$EXIM_COMPILE_NUMBER"'"'
+) >version.sh
+
+if [ ! -f version.h ]
+then
+( echo '/* automatically generated file - see ../scripts/reversion */'
+  echo '#define EXIM_RELEASE_VERSION "'"$EXIM_RELEASE_VERSION"'"'
+  echo '#define EXIM_VARIANT_VERSION "'"$EXIM_VARIANT_VERSION"'"'
+  echo '#define EXIM_VERSION_STR EXIM_RELEASE_VERSION EXIM_VARIANT_VERSION'
+) >version.h
+fi
+
+echo ">>> version $EXIM_RELEASE_VERSION$EXIM_VARIANT_VERSION #$EXIM_COMPILE_NUMBER"
+echo