changed version number to use the latest release tag instead of build date

Before: 2023-11-30
  (build date)
After: 2023-10-31-98.1
  (latest release tag + number of commits since + dirty flag)

3 files changed, 19 insertions, 5 deletions

diff --git a/.gitignore b/.gitignore
index 965a3e3..d420e34 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.build/
 .env/
 .venv/
 .*.swo
@@ -7,6 +8,7 @@ env/
 hex/
 ignore/
 old/
+releases/
 venv/
 *~
 *.cpp
diff --git a/bin/build-all.sh b/bin/build-all.sh
index df72ad5..27209ca 100755
--- a/bin/build-all.sh
+++ b/bin/build-all.sh
@@ -21,9 +21,21 @@ UI=anduril
 
 mkdir -p hex
 
-# TODO: use a git tag for the version, instead of build date
-# TODO: use build/version.h instead of $UI/version.h ?
-date '+#define VERSION_NUMBER "%Y-%m-%d"' > ui/$UI/version.h
+# old: version = build date
+#date '+#define VERSION_NUMBER "%Y-%m-%d"' > ui/$UI/version.h
+
+# version = git tag + revs since + dirty flag
+REV=$(git describe --tags --dirty --abbrev=8 --match='r2*')
+# reformatting this would be easier with a perl one-liner,
+# but I'm trying to avoid extra build dependencies
+REV="${REV:1}"  # strip the leading 'r'
+# strip rev hash (git won't give "commits since tag" without the rev hash)
+REV="${REV/-g[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]/}"
+REV="${REV/-dirty/.1}"  # convert '-dirty' to '.1'
+# save the version name to version.h
+mkdir -p ".build/$UI"
+echo '#define VERSION_NUMBER "'"$REV"'"' > ".build/$UI/version.h"
+
 
 PASS=0
 FAIL=0
@@ -48,7 +60,7 @@ for TARGET in hw/*/*/**/"$UI".h ; do
   if [ 1 = $SKIP ]; then continue ; fi
 
   # announce what we're going to build
-  echo "===== $UI : $NAME ====="
+  echo "===== $UI $REV : $NAME ====="
 
   # try to compile, track result, and rename compiled files
   if bin/build.sh "$TARGET" ; then
diff --git a/bin/build.sh b/bin/build.sh
index 9b4b0b3..d044ca5 100755
--- a/bin/build.sh
+++ b/bin/build.sh
@@ -49,7 +49,7 @@ export CPP=avr-cpp
 export OBJCOPY=avr-objcopy
 export DFPFLAGS="-B $DFPPATH/gcc/dev/$MCUNAME/ -I $DFPPATH/include/"
 # TODO: include $user/ first so it can override other stuff
-INCLUDES="-I ui -I hw -I. -I.. -I../.. -I../../.."
+INCLUDES="-I .build -I ui -I hw -I. -I.. -I../.. -I../../.."
 export CFLAGS="  -Wall -g -Os -mmcu=$MCUNAME -c -std=gnu99 -fgnu89-inline -fwhole-program $MCUFLAGS $INCLUDES -fshort-enums $DFPFLAGS"
 export CPPFLAGS="-Wall -g -Os -mmcu=$MCUNAME -C -std=gnu99 -fgnu89-inline -fwhole-program $MCUFLAGS $INCLUDES -fshort-enums $DFPFLAGS"
 export OFLAGS="-Wall -g -Os -mmcu=$MCUNAME -mrelax $DFPFLAGS"