scripts/patch_git.sh

   1 #!/usr/bin/env bash
   2 #
   3 # Patch sources using git-am, aligning things to use git-format-patch for
   4 # update-patches.
   5 #
   6 # (c) 2021 Phil Sutter <phil@nwl.cc>
   7 #
   8 # Based on the classic patch.sh, written by:
   9 #
  10 # (c) 2006, 2007 Thorsten Glaser <tg@freewrt.org>
  11 # (c) 2002 Erik Andersen <andersen@codepoet.org>
  12
  13 [[ -n $BASH_VERSION ]] && shopt -s extglob
  14
  15 # Set directories from arguments, or use defaults.
  16 targetdir=${1-.}
  17 patchdir=${2-../patches}
  18 patchpattern=${3-*}
  19
  20 if [ ! -d "${targetdir}" ] ; then
  21     echo "Aborting.  '${targetdir}' is not a directory."
  22     exit 1
  23 fi
  24 if [ ! -d "${patchdir}" ] ; then
  25     echo "Aborting.  '${patchdir}' is not a directory."
  26     exit 0
  27 fi
  28
  29 wd=$(pwd)
  30
  31 cd "${targetdir}"
  32 if [ ! -d .git ]; then
  33     # drop leftover .gitignores in non-git sources, they
  34     # might prevent us from patching 'temporary' files
  35     # which are still present in the tarball.
  36     find . -name .gitignore -delete
  37     git init
  38     git add .
  39 elif [ -e .git/rebase-apply ]; then
  40     git am --abort
  41 fi
  42
  43 i=0
  44 patch_tmp=$(printf ".git/patch_tmp/%04d" $i)
  45 while [ -d $patch_tmp ]; do
  46         let "i++"
  47         patch_tmp=$(printf ".git/patch_tmp/%04d" $i)
  48 done
  49 mkdir -p $patch_tmp
  50 patch_series=$(printf "%04d" $i)
  51
  52 git commit --allow-empty --no-signoff --no-gpg-sign \
  53     --author="OpenADK <wbx@openadk.org>" \
  54     -m "OpenADK patch marker: $patch_series"
  55
  56 cd $wd
  57 cd $patchdir
  58 for i in $(eval echo ${patchpattern}); do
  59     test -e "$i" || continue
  60     i=$patchdir/$i
  61     cd $wd
  62     case $i in
  63         *.gz)
  64         type="gzip"; uncomp="gunzip -dc"; ;;
  65         *.bz)
  66         type="bzip"; uncomp="bunzip -dc"; ;;
  67         *.bz2)
  68         type="bzip2"; uncomp="bunzip2 -dc"; ;;
  69         *.zip)
  70         type="zip"; uncomp="unzip -d"; ;;
  71         *.Z)
  72         type="compress"; uncomp="uncompress -c"; ;;
  73         *)
  74         type="plaintext"; uncomp="cat"; ;;
  75     esac
  76     [ -d "${i}" ] && echo "Ignoring subdirectory ${i}" && continue
  77     echo "$(basename $i)" >>${targetdir}/${patch_tmp}/__patchfiles__
  78     patchname="$(basename -s .gz -s .bz -s .bz2 -s .zip -s .Z -s .patch $i)"
  79     {
  80         if ! grep -q '^Subject: ' ${i}; then
  81             echo "From: OpenADK <wbx@openadk.org>"
  82             echo "Subject: [PATCH] ${patchname#[0-9]*-}"
  83             echo ""
  84         fi
  85         ${uncomp} ${i}
  86     } >${targetdir}/${patch_tmp}/${patchname}.patch
  87     cd $patchdir
  88 done
  89
  90 # no patches to apply? bail out
  91 [ -e ${targetdir}/${patch_tmp}/__patchfiles__ ] || {
  92         rmdir ${targetdir}/${patch_tmp}
  93         exit 0
  94 }
  95
  96 # provide backwards compatibility to old style using 'patch' program
  97 # XXX: this is unsafe and should be dropped at some point
  98 am_opts="-C1"
  99
 100 cd ${wd}
 101 realpath $patchdir >${targetdir}/${patch_tmp}/__patchdir__
 102 cd ${targetdir}
 103 git am $am_opts ${patch_tmp}/*.patch
 104 if [ $? != 0 ] ; then
 105     echo "git-am failed! Please fix patches!"
 106     exit 1
 107 fi