9os

commit a2239b4be6e56d68d4cc311ca1489cd5cd2ae7de
parent 60adb80fd49472ba9b3fc06df04aea6b61c82692
Author: Roberto E. Vargas Caballero <roberto.vargas@midokura.com>
Date:   Tue, 22 Nov 2022 20:04:19 +0100

os9: Regenerate version.h in commit changes

The file version.h was generated once and it was not regenerated
ever, generating builds with wrong version identifiers.

Diffstat:
M
src/os9/Makefile
 | 
2
+-
M
src/os9/mkver
 | 
17
++++++++++++-----

2 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/src/os9/Makefile b/src/os9/Makefile
@@ -18,7 +18,7 @@ OBJS =\
 
 all: image
 
-version.h:
+version.h: FORCE
 	./mkver
 
 sys.o: version.h
diff --git a/src/os9/mkver b/src/os9/mkver
@@ -1,9 +1,16 @@
 #!/bin/sh
 
-set -e
 trap 'rm -f $$.tmp' EXIT HUP INT QUIT TERM
 
-git show-ref HEAD |
-awk '{printf("#define OS9VERSION \"%s\"\n",
-	     substr($1, 1, 8))
-}' > $$.tmp && mv $$.tmp version.h
+git=`git show-ref --head | awk '$2 == "HEAD" {print substr($1, 1, 8)}'`
+ver=`sed -n '/OS9VERSION/ s/.*"\(.*\)"/\1/p' version.h 2>/dev/null`
+
+if test "$ver" = "$git"
+then
+	exit
+fi
+
+rm -f version.h
+
+echo '#define OS9VERSION "'$git'"' > $$.tmp &&
+mv $$.tmp version.h