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) 2016 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     git commit -a --allow-empty \
  40             --author="OpenADK <wbx@openadk.org>" \
  41             -m "OpenADK patch marker: 0000"
  42 fi
  43 [ -e .git/rebase-apply ] && \
  44         git am --abort
  45
  46 i=1
  47 patch_tmp=$(printf ".git/patch_tmp/%04d" $i)
  48 while [ -d $patch_tmp ]; do
  49         let "i++"
  50         patch_tmp=$(printf ".git/patch_tmp/%04d" $i)
  51 done
  52 mkdir -p $patch_tmp
  53 patch_series=$(printf "%04d" $i)
  54
  55 cd $wd
  56 cd $patchdir
  57 for i in $(eval echo ${patchpattern}); do
  58     test -e "$i" || continue
  59     i=$patchdir/$i
  60     cd $wd
  61     case $i in
  62         *.gz)
  63         type="gzip"; uncomp="gunzip -dc"; ;;
  64         *.bz)
  65         type="bzip"; uncomp="bunzip -dc"; ;;
  66         *.bz2)
  67         type="bzip2"; uncomp="bunzip2 -dc"; ;;
  68         *.zip)
  69         type="zip"; uncomp="unzip -d"; ;;
  70         *.Z)
  71         type="compress"; uncomp="uncompress -c"; ;;
  72         *)
  73         type="plaintext"; uncomp="cat"; ;;
  74     esac
  75     [ -d "${i}" ] && echo "Ignoring subdirectory ${i}" && continue
  76     echo "$(basename $i)" >>${targetdir}/${patch_tmp}/__patchfiles__
  77     fake_hdr=""
  78     patchname="$(basename -s .gz -s .bz -s .bz2 -s .zip -s .Z -s .patch $i)"
  79     if ! grep -q '^Subject: ' ${i}; then
  80         fake_hdr="From: OpenADK <wbx@openadk.org>\nSubject: [PATCH] ${patchname#[0-9]*-}\n\n"
  81     fi
  82     { echo -en $fake_hdr; ${uncomp} ${i}; } >${targetdir}/${patch_tmp}/${patchname}.patch
  83     cd $patchdir
  84 done
  85
  86 # no patches to apply? bail out
  87 [ -e ${targetdir}/${patch_tmp}/__patchfiles__ ] || {
  88         rmdir ${targetdir}/${patch_tmp}
  89         exit 0
  90 }
  91
  92 # provide backwards compatibility to old style using 'patch' program
  93 # XXX: this is unsafe and should be dropped at some point
  94 am_opts="-C1"
  95
  96 realpath $patchdir >${targetdir}/${patch_tmp}/__patchdir__
  97 cd ${targetdir}
  98 git am $am_opts ${patch_tmp}/*.patch
  99 if [ $? != 0 ] ; then
 100     echo "git-am failed! Please fix patches!"
 101     exit 1
 102 fi
 103 git commit -a --allow-empty \
 104         --author="OpenADK <wbx@openadk.org>" \
 105         -m "OpenADK patch marker: $patch_series"