Merge branch 'dm/add-i-edit-abort'
[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 $?
33         )"
34 else
35         dashless=$(basename "$0" | sed -e 's/-/ /')
36         usage() {
37                 die "Usage: $dashless $USAGE"
38         }
39
40         if [ -z "$LONG_USAGE" ]
41         then
42                 LONG_USAGE="Usage: $dashless $USAGE"
43         else
44                 LONG_USAGE="Usage: $dashless $USAGE
45
46 $LONG_USAGE"
47         fi
48
49         case "$1" in
50                 -h|--h|--he|--hel|--help)
51                 echo "$LONG_USAGE"
52                 exit
53         esac
54 fi
55
56 set_reflog_action() {
57         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
58         then
59                 GIT_REFLOG_ACTION="$*"
60                 export GIT_REFLOG_ACTION
61         fi
62 }
63
64 git_editor() {
65         : "${GIT_EDITOR:=$(git config core.editor)}"
66         : "${GIT_EDITOR:=${VISUAL:-${EDITOR}}}"
67         case "$GIT_EDITOR,$TERM" in
68         ,dumb)
69                 echo >&2 "No editor specified in GIT_EDITOR, core.editor, VISUAL,"
70                 echo >&2 "or EDITOR. Tried to fall back to vi but terminal is dumb."
71                 echo >&2 "Please set one of these variables to an appropriate"
72                 echo >&2 "editor or run $0 with options that will not cause an"
73                 echo >&2 "editor to be invoked (e.g., -m or -F for git-commit)."
74                 exit 1
75                 ;;
76         esac
77         eval "${GIT_EDITOR:=vi}" '"$@"'
78 }
79
80 is_bare_repository () {
81         git rev-parse --is-bare-repository
82 }
83
84 cd_to_toplevel () {
85         cdup=$(git rev-parse --show-cdup)
86         if test ! -z "$cdup"
87         then
88                 # The "-P" option says to follow "physical" directory
89                 # structure instead of following symbolic links.  When cdup is
90                 # "../", this means following the ".." entry in the current
91                 # directory instead textually removing a symlink path element
92                 # from the PWD shell variable.  The "-P" behavior is more
93                 # consistent with the C-style chdir used by most of Git.
94                 cd -P "$cdup" || {
95                         echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
96                         exit 1
97                 }
98         fi
99 }
100
101 require_work_tree () {
102         test $(git rev-parse --is-inside-work-tree) = true ||
103         die "fatal: $0 cannot be used without a working tree."
104 }
105
106 get_author_ident_from_commit () {
107         pick_author_script='
108         /^author /{
109                 s/'\''/'\''\\'\'\''/g
110                 h
111                 s/^author \([^<]*\) <[^>]*> .*$/\1/
112                 s/'\''/'\''\'\'\''/g
113                 s/.*/GIT_AUTHOR_NAME='\''&'\''/p
114
115                 g
116                 s/^author [^<]* <\([^>]*\)> .*$/\1/
117                 s/'\''/'\''\'\'\''/g
118                 s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
119
120                 g
121                 s/^author [^<]* <[^>]*> \(.*\)$/\1/
122                 s/'\''/'\''\'\'\''/g
123                 s/.*/GIT_AUTHOR_DATE='\''&'\''/p
124
125                 q
126         }
127         '
128         encoding=$(git config i18n.commitencoding || echo UTF-8)
129         git show -s --pretty=raw --encoding="$encoding" "$1" -- |
130         LANG=C LC_ALL=C sed -ne "$pick_author_script"
131 }
132
133 # Make sure we are in a valid repository of a vintage we understand,
134 # if we require to be in a git repository.
135 if test -z "$NONGIT_OK"
136 then
137         GIT_DIR=$(git rev-parse --git-dir) || exit
138         if [ -z "$SUBDIRECTORY_OK" ]
139         then
140                 test -z "$(git rev-parse --show-cdup)" || {
141                         exit=$?
142                         echo >&2 "You need to run this command from the toplevel of the working tree."
143                         exit $exit
144                 }
145         fi
146         test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
147                 echo >&2 "Unable to determine absolute path of git directory"
148                 exit 1
149         }
150         : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
151 fi
152
153 # Fix some commands on Windows
154 case $(uname -s) in
155 *MINGW*)
156         # Windows has its own (incompatible) sort and find
157         sort () {
158                 /usr/bin/sort "$@"
159         }
160         find () {
161                 /usr/bin/find "$@"
162         }
163         ;;
164 esac