absurd/git

   1 #!/bin/sh
   2 set -e
   3
   4 case "$DGIT_ABSURD_DEBUG" in
   5 ''|0)   exec 3>/dev/null ;;
   6 1)      exec 3>>../../gbp-pq-output ;;
   7 *)      exec 3>>../../gbp-pq-output 2>&3 ;;
   8 esac
   9
  10 exec 4>>../../absurd-apply-warnings
  11
  12 log () {
  13         echo >&3 "DGIT ABSURD GIT APPLY (DEBUG)  $*"
  14         echo >&2 "DGIT ABSURD GIT APPLY (STDERR) $*"
  15 }
  16
  17 fail () {
  18         log "FAILED: $*"
  19         exit 127
  20 }
  21
  22 self=${0%/*}
  23 npath=${PATH#$self:}
  24 if test "x$PATH" = "x$npath"; then
  25         fail "PATH FILTER FAIL ($0 $self $PATH)"
  26 fi
  27
  28 filter_path () {
  29         PATH=$npath
  30 }
  31
  32 squash_author () {
  33         author_vars='NAME EMAIL DATE'
  34         for var in in $author_vars; do
  35                 eval "GIT_AUTHOR_$var=\$GIT_COMMITTER_$var"
  36         done
  37 }
  38
  39 try_commit () { git commit-tree "$try_commit_obj" </dev/null >/dev/null; }
  40
  41 maybe_squash_author () {
  42         if   (set -e; filter_path;                try_commit); then return; fi
  43         if ! (set -e; filter_path; squash_author; try_commit); then return; fi
  44         read last <../../absurd-apply-applied
  45         echo >&4 \
  46  "dgit: warning: suppressed corrupted metadata! ($last)"
  47         squash_author
  48 }
  49
  50 bypass=true
  51 for arg in "$@"; do
  52         case "$arg" in
  53         apply)  bypass=false; break     ;;
  54         commit-tree)
  55                 # Work around #950446 in gbp
  56                 echo >&3 "DGIT ABSURD GIT APPLY - COMMIT-TREE: $*"
  57                 try_commit_obj="$2"
  58                 maybe_squash_author
  59                 bypass=true; break
  60                 ;;
  61         -*)                             ;;
  62         *)      bypass=true; break      ;;
  63         esac
  64 done
  65
  66 if $bypass; then
  67         filter_path
  68         echo >&3 "DGIT ABSURD GIT APPLY - BYPASS: $*"
  69         exec git "$@"
  70 fi
  71
  72 log "NO BYPASS: $*"
  73
  74 case "$DGIT_ABSURD_DEBUG" in
  75 ''|0|1) ;;
  76 *)      set -x ;;
  77 esac
  78
  79 #exec >/dev/tty 2>&1
  80
  81 index=0
  82 noo=0
  83
  84 for arg in "$@"; do
  85         case "$noo.$arg" in
  86         1.--index)
  87                 index=1
  88                 continue
  89                 ;;
  90         1.--whitespace=fix)
  91                 continue
  92                 ;;
  93         ?.-*)
  94                 fail "UNKNOWN OPTION $arg ($*)"
  95                 ;;
  96         0.apply)
  97                 ;;
  98         1.*)    patch="$arg"
  99                 ;;
 100         *)
 101                 fail "BAD USAGE $arg ($noo $*)"
 102         esac
 103         noo=$(( $noo + 1 ))
 104 done
 105
 106 if [ $noo != 2 ]; then
 107         fail "NO PATCH ($*)"
 108 fi
 109
 110 pwd=`pwd`
 111 patch=${patch#$pwd/debian/patches/}
 112 rm -f debian/patches/series
 113
 114 # Work around #848611.
 115 # We need a stunt filename which the source package must not
 116 # contain.  A trick is to use the commit hash of HEAD, whose
 117 # hash value cannot appear in any file in its own tree.
 118 omgwtf="dgit-omg-wtf-$(git rev-parse HEAD)"
 119 cat <<END >debian/patches/$omgwtf
 120 ---
 121 --- a/$omgwtf   2016-10-31 23:28:47.314155919 +0000
 122 +++ b/$omgwtf   2016-12-18 22:40:01.870058270 +0000
 123 @@ -0,0 +1 @@
 124 +:
 125 END
 126 printf "%s\n" "$omgwtf" >debian/patches/series
 127 printf "%s\n" "$patch" >>debian/patches/series
 128
 129 # Just in case some joker tries to patch .git/something
 130 mv .git ../.git
 131 set +e
 132 dpkg-source --before-build .
 133 rc=$?
 134 set -e
 135 rm -rf .git
 136 mv ../.git .
 137 test $rc = 0
 138
 139 rm -f $omgwtf debian/patches/$omgwtf
 140
 141 rm -rf .pc
 142 git checkout debian/patches/series
 143 git add -Af .
 144
 145 log "APPLIED $patch"
 146 printf >../../absurd-apply-applied '%s\n' "$patch"
 147 #printf 'APPLIED '; date --iso-8601=ns