build_cached

   1 #!/bin/bash
   2
   3 MAKE=$1
   4 SRC=$2
   5 CACHESUBDIR=$3
   6
   7 # skip caching if cache folder is not set or does not exist or omd version length is too small, which would be error prone
   8 if [ "x$BUILD_CACHE" = "x" ] || ! test -d $BUILD_CACHE || [ ${#OMD_VERSION} -lt 5 ]; then
   9     $MAKE -C "$SRC" build
  10     exit $?
  11 fi
  12
  13 BUILD_CACHE=$BUILD_CACHE/$CACHESUBDIR
  14 mkdir -p $BUILD_CACHE
  15
  16 $MAKE -C "$SRC" clean
  17 MD5=$(cd "$SRC" && find . -type f -exec md5sum {} \; | sort | md5sum | awk '{ print $1 }')
  18 CACHE_FILE="$BUILD_CACHE/${SRC}_${MD5}.tgz"
  19
  20 # cache hit - just unpack the already built package
  21 if test -e "$CACHE_FILE"; then
  22     echo "md5sum matched, using cache from $CACHE_FILE"
  23     tar zxf "$CACHE_FILE"
  24     find "$SRC/" -type f | \
  25     while read file; do
  26         if grep -Ic "###BUILD_OMD_VERSION###" "$file" >/dev/null 2>&1; then
  27             cp -p "$file" "$file.tmp"
  28             sed -e "s%###BUILD_OMD_VERSION###%$OMD_VERSION%g" -i "$file"
  29             touch -r "$file.tmp" "$file"
  30             rm -f "$file.tmp"
  31         fi
  32     done
  33     exit 0
  34 fi
  35 EXCLUDES_FILE=$(mktemp)
  36 find "$SRC" -type f > $EXCLUDES_FILE
  37
  38 # no cache hit - rebuild package and create cache tarball
  39 set -e
  40 $MAKE -C "$SRC" build
  41 set +e
  42
  43 # create cache file
  44 find "$SRC/" -type f | \
  45 while read file; do
  46     if grep -Ic "$OMD_VERSION" "$file" >/dev/null 2>&1; then
  47         cp -p "$file" "$file.tmp"
  48         sed -e "s%$OMD_VERSION%###BUILD_OMD_VERSION###%g" -i "$file"
  49         touch -r "$file.tmp" "$file"
  50         rm -f "$file.tmp"
  51     fi
  52 done
  53 TARBALL_TMP=$(mktemp)
  54 tar cfz $TARBALL_TMP "$SRC" --exclude-from=$EXCLUDES_FILE
  55 rm -f "$CACHE_FILE"
  56 mv $TARBALL_TMP "$CACHE_FILE"
  57 echo "cache file $CACHE_FILE created"
  58 rm $EXCLUDES_FILE
  59 find "$SRC/" -type f | \
  60 while read file; do
  61     if grep -Ic "###BUILD_OMD_VERSION###" "$file" >/dev/null 2>&1; then
  62         cp -p "$file" "$file.tmp"
  63         sed -e "s%###BUILD_OMD_VERSION###%$OMD_VERSION%g" -i "$file"
  64         touch -r "$file.tmp" "$file"
  65         rm -f "$file.tmp"
  66     fi
  67 done
  68
  69 exit 0