tests/tartree-edit

   1 #!/bin/sh
   2 set -e
   3 fail () { echo >&2 "$0: $*"; exit 1; }
   4
   5 play=.git/tartree-edit-work
   6
   7 git_manip_play () {
   8         local wd=$(pwd)
   9         case "$wd" in
  10         *.edit) fail "bad idea to run gitfetchinfo into a .edit tree!" ;;
  11         esac
  12         rm -rf $play
  13         mkdir $play
  14 }
  15
  16 gitfetchdiff_list () {
  17         git for-each-ref --format '%(refname) %(objectname)' \
  18                 refs/remotes/"$1" \
  19         | sed 's/^refs\/remotes\/[^\/]*\///' \
  20         | sort >"$play/$2"
  21 }
  22
  23 gitfetchdiff () {
  24         local how="$1"
  25         local a="$2"
  26         local b="$3"
  27         git_manip_play
  28
  29         rrab=refs/remotes/"$a+$b"
  30
  31         ulf=\
  32 "delete refs/remotes/$a/%l
  33 delete refs/remotes/$b/%l
  34 "
  35         case "$how" in
  36         diff)
  37                 git for-each-ref --format 'delete %(refname)' $rrab \
  38                         | git update-ref --stdin
  39                 ;;
  40         merge)
  41                 ulf=\
  42 "create $rrab/%l
  43 $ulf"
  44                 ;;
  45         *)
  46                 fail "internal error bad how ($how)"
  47                 ;;
  48         esac
  49
  50         gitfetchdiff_list "$a" a
  51         gitfetchdiff_list "$b" b
  52
  53         diff --old-line-format='' --new-line-format='' \
  54                 --unchanged-line-format="$ulf" \
  55                 $play/a $play/b >$play/updates \
  56         || test $? = 1
  57
  58         git update-ref --stdin <$play/updates
  59         exit 0
  60 }
  61
  62 case "$#.$1" in
  63 2.edit|2.done)  mode="$1"; arg="$2" ;;
  64 3.gitfetchinfo) mode="$1"; arg="$2"; remote="$3" ;;
  65 3.gitfetchinfo-diff)    gitfetchdiff diff "$2" "$3"     ;;
  66 3.gitfetchinfo-merge)   gitfetchdiff merge "$2" "$3"    ;;
  67 ?.-*)   fail "no options understood"                    ;;
  68 *)      fail "usage:
  69     tartree-edit edit|done DIRECTORY|TARBALL
  70     tartree-edit gitfetchinfo DIRECTORY|TARBALL REMOTE" ;;
  71 esac
  72
  73 case "$arg" in
  74 *.tar)          base=${arg%.tar}                        ;;
  75 *.edit)         base=${arg%.edit}                       ;;
  76 *)              base=${arg}                             ;;
  77 esac
  78
  79 tryat_pre () {
  80         local b="$1"
  81         rm -rf "$b.tmp"
  82         if test -f "$b.tar" && test -f "$b.edit"; then
  83                 echo "$b.edit exists, deleting possibly-obsolete $b.tar"
  84                 rm "$b.tar"
  85         fi
  86 }
  87
  88 tryat_edit () {
  89         local b="$1"
  90         if test -d "$b.edit"; then
  91                 echo "$b.edit already exists"
  92                 exit 0
  93         fi
  94         if test -f "$b.tar"; then
  95                 mkdir "$b.tmp"
  96                 (set -e; cd "$b.tmp"; tar xf "$b.tar")
  97                 mv "$b.tmp" "$b.edit"
  98                 rm "$b.tar"
  99                 echo "$b.edit ready"
 100                 exit 0
 101         fi
 102 }
 103
 104 gitfetchinfo_perhaps_commit () {
 105         local m="$1"
 106         set +e
 107         git diff --cached --quiet --exit-code HEAD
 108         local rc=$?
 109         set -e
 110         case "$rc" in
 111         0)   return ;;
 112         1)   git commit --allow-empty --author='tartree-edit <>' -m "$m" ;;
 113         *)   fail "git diff failed ($rc)" ;;
 114         esac
 115 }
 116
 117 tryat_gitfetchinfo () {
 118         git_manip_play
 119
 120         if test -d "$b.edit"; then
 121                 cp -a "$b.edit"/. "$play"/.
 122         else
 123                 exec 3<"$b.tar"
 124                 tar -C $play -f - <&3 -x
 125                 exec 3<&-
 126         fi
 127
 128         local innerwd="$(echo $play/*)"
 129
 130         git for-each-ref --format='%(refname)' refs/remotes >$play/l
 131         perl -w -ne '
 132             our %remerge;
 133             use strict;
 134             chomp;
 135             next unless m#^refs/remotes/([^/]+)/#;
 136             my $old = $_;
 137             my $ab = $1;
 138             my $rhs = $'\'';
 139             my @ab = split /\+/, $ab;
 140             next unless @ab == 2;
 141             next unless (grep { $_ eq "'"$remote"'" } @ab) == 1;
 142             $remerge{"@ab"} = 1;
 143             print "update refs/remotes/$_/$rhs $old\n" or die $! foreach @ab;
 144             print "delete $old\n" or die $!;
 145             END {
 146                 open REMERGE, ">&3" or die $!;
 147                 print REMERGE "$_\n" or die $! foreach sort keys %remerge;
 148                 close REMERGE or die $!;
 149             }
 150         ' <$play/l >$play/unmerge 3>$play/remerge
 151         git update-ref --stdin <$play/unmerge
 152
 153         git remote remove "$remote" 2>/dev/null ||:
 154         git remote add "$remote" $innerwd
 155         git fetch --no-tags -p "$remote" \
 156                 +"HEAD:refs/remotes/$remote/HEAD"
 157         cd $innerwd
 158         GIT_AUTHOR_DATE=$(git log -n1 --pretty=format:'%ai')
 159         GIT_COMMITTER_DATE=$GIT_AUTHOR_DATE
 160         export GIT_COMMITTER_DATE GIT_AUTHOR_DATE
 161         git checkout -b WORKTREE
 162         gitfetchinfo_perhaps_commit INDEX
 163         git add -Af .
 164         gitfetchinfo_perhaps_commit WORKTREE
 165         cd ../../..
 166         git fetch --no-tags "$remote" --refmap \
 167                 +"refs/*:refs/remotes/$remote/*" \
 168                 +"refs/*:refs/remotes/$remote/*"
 169
 170         exec 3<$play/remerge
 171         # $play will be destroyed by what follows, but we have
 172         # an fd open onto remerge, so this will work
 173         while read <&3 a b; do
 174               echo "Updating gitfetchinfo-merge $a $b"
 175               "$0" gitfetchinfo-merge $a $b
 176         done
 177
 178         exit 0
 179 }
 180
 181 tryat_done () {
 182         local b="$1"
 183         if test -d "$b.edit"; then
 184                 (set -e; cd "$b.edit"; tar cf "$b.tmp" *)
 185                 mv "$b.tmp" "$b.tar"
 186                 mv "$b.edit" "$b.tmp"
 187                 rm -rf "$b.tmp"
 188                 echo "$b.tar regenerated"
 189                 exit 0
 190         fi
 191         if test -f "$b.tar"; then
 192                 echo "$b.tar already exists and $b.edit doesn't"
 193                 exit 0
 194         fi
 195 }
 196
 197 tryat () {
 198         local b="$1"
 199         if ! test -f "$b.tar" && ! test -d "$b.edit"; then
 200                 return
 201         fi
 202         tryat_pre "$b"
 203         tryat_$mode "$b"
 204         fail "unexpected situation in $b.*"
 205 }
 206
 207 case "$arg" in
 208 /*)             tryat "$base"
 209                 ;;
 210 *)
 211                 pwd=`pwd`
 212                 tryat "$pwd/$base"
 213                 tryat "$pwd/git-srcs/$base"
 214                 tryat "$pwd/tests/git-srcs/$base"
 215                 fail "could not find $base..."
 216                 ;;
 217 esac