share/genbuild.sh

   1 #!/bin/sh
   2 if [ $# -gt 1 ]; then
   3     cd "$2"
   4 fi
   5 if [ $# -gt 0 ]; then
   6     FILE="$1"
   7     shift
   8     if [ -f "$FILE" ]; then
   9         INFO="$(head -n 1 "$FILE")"
  10     fi
  11 else
  12     echo "Usage: $0 <filename> <srcroot>"
  13     exit 1
  14 fi
  15
  16 DESC=""
  17 SUFFIX=""
  18 LAST_COMMIT_DATE=""
  19 if [ -e "$(which git 2>/dev/null)" -a "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = "true" ]; then
  20     # clean 'dirty' status of touched files that haven't been modified
  21     git diff >/dev/null 2>/dev/null
  22
  23     # if latest commit is tagged and not dirty, then override using the tag name
  24     RAWDESC=$(git describe --abbrev=0 2>/dev/null)
  25     if [ "$(git rev-parse HEAD)" = "$(git rev-list -1 $RAWDESC 2>/dev/null)" ]; then
  26         git diff-index --quiet HEAD -- && DESC=$RAWDESC
  27     fi
  28
  29     # otherwise generate suffix from git, i.e. string like "59887e8-dirty"
  30     SUFFIX=$(git rev-parse --short HEAD)
  31     git diff-index --quiet HEAD -- || SUFFIX="$SUFFIX-dirty"
  32
  33     # get a string like "2012-04-10 16:27:19 +0200"
  34     LAST_COMMIT_DATE="$(git log -n 1 --format="%ci")"
  35 fi
  36
  37 if [ -n "$DESC" ]; then
  38     NEWINFO="#define BUILD_DESC \"$DESC\""
  39 elif [ -n "$SUFFIX" ]; then
  40     NEWINFO="#define BUILD_SUFFIX $SUFFIX"
  41 else
  42     NEWINFO="// No build information available"
  43 fi
  44
  45 # only update build.h if necessary
  46 if [ "$INFO" != "$NEWINFO" ]; then
  47     echo "$NEWINFO" >"$FILE"
  48     if [ -n "$LAST_COMMIT_DATE" ]; then
  49         echo "#define BUILD_DATE \"$LAST_COMMIT_DATE\"" >> "$FILE"
  50     fi
  51 fi