Merge branch 'wc/diff'
[git/git.git] / git-sh-setup.sh
CommitLineData
b33e9666
LT
1#!/bin/sh
2#
ae2b0f15
JH
3# This is included in commands that either have to be run from the toplevel
4# of the repository, or with GIT_DIR environment variable properly.
5# If the GIT_DIR does not look like the right correct git-repository,
6# it dies.
b33e9666 7
365527ad 8# Having this variable in your environment would break scripts because
e598c517 9# you would cause "cd" to be taken to unexpected places. If you
365527ad
JH
10# like CDPATH, define it for your interactive shell sessions without
11# exporting it.
12unset CDPATH
13
b33e9666 14die() {
8098a178 15 echo >&2 "$@"
b33e9666
LT
16 exit 1
17}
18
bac199b7
PH
19if test -n "$OPTIONS_SPEC"; then
20 usage() {
21 exec "$0" -h
22 }
23
e817e3e8
PH
24 parseopt_extra=
25 [ -n "$OPTIONS_KEEPDASHDASH" ] &&
26 parseopt_extra="--keep-dashdash"
27
28 eval "$(
cbea86fd 29 echo "$OPTIONS_SPEC" |
e817e3e8
PH
30 git rev-parse --parseopt $parseopt_extra -- "$@" ||
31 echo exit $?
32 )"
bac199b7
PH
33else
34 usage() {
35 die "Usage: $0 $USAGE"
36 }
37
38 if [ -z "$LONG_USAGE" ]
39 then
40 LONG_USAGE="Usage: $0 $USAGE"
41 else
42 LONG_USAGE="Usage: $0 $USAGE
43
44$LONG_USAGE"
45 fi
46
47 case "$1" in
48 -h|--h|--he|--hel|--help)
49 echo "$LONG_USAGE"
50 exit
51 esac
52fi
d025524d 53
f9474132
SP
54set_reflog_action() {
55 if [ -z "${GIT_REFLOG_ACTION:+set}" ]
56 then
57 GIT_REFLOG_ACTION="$*"
58 export GIT_REFLOG_ACTION
59 fi
60}
61
ef0c2abf 62git_editor() {
08874658
DK
63 : "${GIT_EDITOR:=$(git config core.editor)}"
64 : "${GIT_EDITOR:=${VISUAL:-${EDITOR}}}"
ef0c2abf
AR
65 case "$GIT_EDITOR,$TERM" in
66 ,dumb)
67 echo >&2 "No editor specified in GIT_EDITOR, core.editor, VISUAL,"
68 echo >&2 "or EDITOR. Tried to fall back to vi but terminal is dumb."
69 echo >&2 "Please set one of these variables to an appropriate"
70 echo >&2 "editor or run $0 with options that will not cause an"
71 echo >&2 "editor to be invoked (e.g., -m or -F for git-commit)."
72 exit 1
73 ;;
74 esac
08874658 75 eval "${GIT_EDITOR:=vi}" '"$@"'
ef0c2abf
AR
76}
77
4b441f47 78is_bare_repository () {
5be60078 79 git rev-parse --is-bare-repository
4b441f47
JH
80}
81
9fde9401 82cd_to_toplevel () {
5be60078 83 cdup=$(git rev-parse --show-cdup)
9fde9401
JH
84 if test ! -z "$cdup"
85 then
86 cd "$cdup" || {
87 echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
88 exit 1
89 }
90 fi
91}
92
7eff28a9 93require_work_tree () {
e90fdc39 94 test $(git rev-parse --is-inside-work-tree) = true ||
7eff28a9
SP
95 die "fatal: $0 cannot be used without a working tree."
96}
97
0cae2346
JS
98get_author_ident_from_commit () {
99 pick_author_script='
100 /^author /{
101 s/'\''/'\''\\'\'\''/g
102 h
103 s/^author \([^<]*\) <[^>]*> .*$/\1/
104 s/'\''/'\''\'\'\''/g
105 s/.*/GIT_AUTHOR_NAME='\''&'\''/p
106
107 g
108 s/^author [^<]* <\([^>]*\)> .*$/\1/
109 s/'\''/'\''\'\'\''/g
110 s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
111
112 g
113 s/^author [^<]* <[^>]*> \(.*\)$/\1/
114 s/'\''/'\''\'\'\''/g
115 s/.*/GIT_AUTHOR_DATE='\''&'\''/p
116
117 q
118 }
119 '
120 encoding=$(git config i18n.commitencoding || echo UTF-8)
121 git show -s --pretty=raw --encoding="$encoding" "$1" |
122 LANG=C LC_ALL=C sed -ne "$pick_author_script"
123}
124
22c90717
JH
125# Make sure we are in a valid repository of a vintage we understand,
126# if we require to be in a git repository.
127if test -n "$NONGIT_OK"
d025524d 128then
22c90717
JH
129 if git rev-parse --git-dir >/dev/null 2>&1
130 then
131 : ${GIT_DIR=.git}
132 fi
d025524d 133else
22c90717
JH
134 if [ -z "$SUBDIRECTORY_OK" ]
135 then
136 : ${GIT_DIR=.git}
137 test -z "$(git rev-parse --show-cdup)" || {
138 exit=$?
139 echo >&2 "You need to run this command from the toplevel of the working tree."
140 exit $exit
141 }
142 else
143 GIT_DIR=$(git rev-parse --git-dir) || {
144 exit=$?
145 echo >&2 "Failed to find a valid git directory."
146 exit $exit
147 }
148 fi
149 test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
150 echo >&2 "Unable to determine absolute path of git directory"
151 exit 1
b2bc9a30 152 }
22c90717 153 : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
d025524d 154fi