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