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: $0 <filename> <srcroot>"
  13     exit 1
  14 fi
  15
  16 DESC=""
  17 SUFFIX=""
  18 if [ -e "$(which git 2>/dev/null)" -a "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = "true" ]; then
  19     # clean 'dirty' status of touched files that haven't been modified
  20     git diff >/dev/null 2>/dev/null
  21
  22     # if latest commit is tagged and not dirty, then override using the tag name
  23     RAWDESC=$(git describe --abbrev=0 2>/dev/null)
  24     if [ "$(git rev-parse HEAD)" = "$(git rev-list -1 $RAWDESC 2>/dev/null)" ]; then
  25         git diff-index --quiet HEAD -- && DESC=$RAWDESC
  26     fi
  27
  28     # otherwise generate suffix from git, i.e. string like "59887e8-dirty"
  29     SUFFIX=$(git rev-parse --short HEAD)
  30     git diff-index --quiet HEAD -- || SUFFIX="$SUFFIX-dirty"
  31 fi
  32
  33 if [ -n "$DESC" ]; then
  34     NEWINFO="#define BUILD_DESC \"$DESC\""
  35 elif [ -n "$SUFFIX" ]; then
  36     NEWINFO="#define BUILD_SUFFIX $SUFFIX"
  37 else
  38     NEWINFO="// No build information available"
  39 fi
  40
  41 # only update build.h if necessary
  42 if [ "$INFO" != "$NEWINFO" ]; then
  43     echo "$NEWINFO" >"$FILE"
  44 fi