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t5318: avoid unnecessary command substitutions
[thirdparty/git.git] / git-rebase--merge.sh
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1# This shell script fragment is sourced by git-rebase to implement
2# its merge-based non-interactive mode that copes well with renamed
3# files.
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4#
5# Copyright (c) 2010 Junio C Hamano.
6#
7
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8prec=4
9
10read_state () {
11 onto_name=$(cat "$state_dir"/onto_name) &&
12 end=$(cat "$state_dir"/end) &&
13 msgnum=$(cat "$state_dir"/msgnum)
14}
15
16continue_merge () {
17 test -d "$state_dir" || die "$state_dir directory does not exist"
18
19 unmerged=$(git ls-files -u)
20 if test -n "$unmerged"
21 then
22 echo "You still have unmerged paths in your index"
23 echo "did you forget to use git add?"
24 die "$resolvemsg"
25 fi
26
f257482c 27 cmt=$(cat "$state_dir/current")
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28 if ! git diff-index --quiet --ignore-submodules HEAD --
29 then
850e9257 30 if ! git commit ${gpg_sign_opt:+"$gpg_sign_opt"} $signoff $allow_empty_message \
a6c612b5 31 --no-verify -C "$cmt"
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32 then
33 echo "Commit failed, please do not call \"git commit\""
34 echo "directly, but instead do one of the following: "
35 die "$resolvemsg"
36 fi
37 if test -z "$GIT_QUIET"
38 then
39 printf "Committed: %0${prec}d " $msgnum
40 fi
41 echo "$cmt $(git rev-parse HEAD^0)" >> "$state_dir/rewritten"
42 else
43 if test -z "$GIT_QUIET"
44 then
45 printf "Already applied: %0${prec}d " $msgnum
46 fi
47 fi
48 test -z "$GIT_QUIET" &&
49 GIT_PAGER='' git log --format=%s -1 "$cmt"
50
51 # onto the next patch:
52 msgnum=$(($msgnum + 1))
53 echo "$msgnum" >"$state_dir/msgnum"
54}
55
56call_merge () {
95104c7e 57 msgnum="$1"
58 echo "$msgnum" >"$state_dir/msgnum"
59 cmt="$(cat "$state_dir/cmt.$msgnum")"
fa99c1e1 60 echo "$cmt" > "$state_dir/current"
fbd7a232 61 git update-ref REBASE_HEAD "$cmt"
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62 hd=$(git rev-parse --verify HEAD)
63 cmt_name=$(git symbolic-ref HEAD 2> /dev/null || echo HEAD)
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64 eval GITHEAD_$cmt='"${cmt_name##refs/heads/}~$(($end - $msgnum))"'
65 eval GITHEAD_$hd='$onto_name'
66 export GITHEAD_$cmt GITHEAD_$hd
67 if test -n "$GIT_QUIET"
68 then
69 GIT_MERGE_VERBOSITY=1 && export GIT_MERGE_VERBOSITY
70 fi
71 test -z "$strategy" && strategy=recursive
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72 # If cmt doesn't have a parent, don't include it as a base
73 base=$(git rev-parse --verify --quiet $cmt^)
74 eval 'git-merge-$strategy' $strategy_opts $base ' -- "$hd" "$cmt"'
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75 rv=$?
76 case "$rv" in
77 0)
78 unset GITHEAD_$cmt GITHEAD_$hd
79 return
80 ;;
81 1)
82 git rerere $allow_rerere_autoupdate
83 die "$resolvemsg"
84 ;;
85 2)
b3256809 86 echo "Strategy: $strategy failed, try another" 1>&2
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87 die "$resolvemsg"
88 ;;
89 *)
90 die "Unknown exit code ($rv) from command:" \
91 "git-merge-$strategy $cmt^ -- HEAD $cmt"
92 ;;
93 esac
94}
95
96finish_rb_merge () {
97 move_to_original_branch
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98 if test -s "$state_dir"/rewritten
99 then
100 git notes copy --for-rewrite=rebase <"$state_dir"/rewritten
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101 hook="$(git rev-parse --git-path hooks/post-rewrite)"
102 test -x "$hook" && "$hook" rebase <"$state_dir"/rewritten
fa99c1e1 103 fi
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104 say All done.
105}
106
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107git_rebase__merge () {
108
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109case "$action" in
110continue)
111 read_state
112 continue_merge
113 while test "$msgnum" -le "$end"
114 do
115 call_merge "$msgnum"
116 continue_merge
117 done
118 finish_rb_merge
01a1e646 119 return
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120 ;;
121skip)
122 read_state
123 git rerere clear
124 msgnum=$(($msgnum + 1))
125 while test "$msgnum" -le "$end"
126 do
127 call_merge "$msgnum"
128 continue_merge
129 done
130 finish_rb_merge
01a1e646 131 return
fa99c1e1 132 ;;
66335298 133show-current-patch)
fbd7a232 134 exec git show REBASE_HEAD --
66335298 135 ;;
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136esac
137
138mkdir -p "$state_dir"
139echo "$onto_name" > "$state_dir/onto_name"
84df4560 140write_basic_state
fbd7a232 141rm -f "$(git rev-parse --git-path REBASE_HEAD)"
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142
143msgnum=0
f257482c 144for cmt in $(git rev-list --reverse --no-merges "$revisions")
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145do
146 msgnum=$(($msgnum + 1))
147 echo "$cmt" > "$state_dir/cmt.$msgnum"
148done
149
150echo 1 >"$state_dir/msgnum"
151echo $msgnum >"$state_dir/end"
152
153end=$msgnum
154msgnum=1
155
156while test "$msgnum" -le "$end"
157do
158 call_merge "$msgnum"
159 continue_merge
160done
161
162finish_rb_merge
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163
164}