Update fixver.sh script to rely on base.h version.

Note that this script was relying on the project version set in the
CMakeLists.txt and then update the base.h file. This is not great,
because if one updates manually (which ideally shouldn't be the case),
then they may also forget to update the CMakeLists.txt.
Normally cmake should not modify version-controlled sources and be
independent from the rest of the project to keep cmake decoupled from
the actual project structure considering some projects may use multiple
build or meta-build systems.
Therefore it makes sense that cmake will instead retrieve the project
version during config-time from the base.h file. Will be done next.

Author: giladreich

misc/fixver.sh

@@ -6,15 +6,16 @@
 #  digits will remain unchanged and the comment will be set to the date.
 #  This is in particular useful for making SVN snapshots.
 
+BASE_H_FILE="include/allegro5/base.h"
 
-if [ $# -eq 1 -a $1 == "datestamp" ]; then
-   # Uses GNU grep -o.
-   ver=$( grep -o "ALLEGRO_VERSION [0-9.]*" CMakeLists.txt | cut -d' ' -f2 )
-   major_num=$( echo $ver | cut -d. -f1 )
-   sub_num=$( echo $ver | cut -d. -f2 )
-   wip_num=$( echo $ver | cut -d. -f3 )
-   $0 $major_num $sub_num $wip_num `date '+%Y%m%d'`
-   exit 0
+if [ $# -eq 1 ] && [ "$1" = "datestamp" ]; then
+   major_num=$( awk '/^#define\s+ALLEGRO_VERSION\s+[0-9]+$/ { print $NF }' $BASE_H_FILE )
+   sub_num=$( awk '/^#define\s+ALLEGRO_SUB_VERSION\s+[0-9]+$/ { print $NF }' $BASE_H_FILE )
+   wip_num=$( awk '/^#define\s+ALLEGRO_WIP_VERSION\s+[0-9]+$/ { print $NF }' $BASE_H_FILE )
+   datestamp=`date '+%Y%m%d'`
+   echo "Re-invoking script with args: [$major_num $sub_num $wip_num $datestamp]"
+   $0 $major_num $sub_num $wip_num $datestamp
+   exit $?
 fi
 
 case $# in
@@ -81,14 +82,9 @@ echo "s/\#define ALLEGRO_VERSION_STR .*/\#define ALLEGRO_VERSION_STR      \"$ver
 echo "s/\#define ALLEGRO_DATE_STR .*/\#define ALLEGRO_DATE_STR         \"$year\"/" >> fixver.sed
 echo "s/\#define ALLEGRO_DATE .*/\#define ALLEGRO_DATE             $year$month$day    \/\* yyyymmdd \*\//" >> fixver.sed
 
-echo "Patching include/allegro5/base.h..."
-cp include/allegro5/base.h fixver.tmp
-sed -f fixver.sed fixver.tmp > include/allegro5/base.h
-
-# patch CMakeLists.txt
-echo "Patching CMakeLists.txt..."
-cp CMakeLists.txt fixver.tmp
-sed -e "s/set(ALLEGRO_VERSION [^)]*)/set(ALLEGRO_VERSION $1.$2.$3)/" fixver.tmp > CMakeLists.txt
+echo "Patching ${BASE_H_FILE}..."
+cp $BASE_H_FILE fixver.tmp
+sed -f fixver.sed fixver.tmp > $BASE_H_FILE
 
 # clean up after ourselves
 rm fixver.sed fixver.tmp