Merge branch 'jc/maint-format-patch-o-relative' into maint
[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 "$cdup"
87         then
88                 case "$cdup" in
89                 /*)
90                         # Not quite the same as if we did "cd -P '$cdup'" when
91                         # $cdup contains ".." after symlink path components.
92                         # Don't fix that case at least until Git switches to
93                         # "cd -P" across the board.
94                         phys="$cdup"
95                         ;;
96                 ..|../*|*/..|*/../*)
97                         # Interpret $cdup relative to the physical, not logical, cwd.
98                         # Probably /bin/pwd is more portable than passing -P to cd or pwd.
99                         phys="$(unset PWD; /bin/pwd)/$cdup"
100                         ;;
101                 *)
102                         # There's no "..", so no need to make things absolute.
103                         phys="$cdup"
104                         ;;
105                 esac
106
107                 cd "$phys" || {
108                         echo >&2 "Cannot chdir to $phys, the toplevel of the working tree"
109                         exit 1
110                 }
111         fi
112 }
113
114 require_work_tree () {
115         test $(git rev-parse --is-inside-work-tree) = true ||
116         die "fatal: $0 cannot be used without a working tree."
117 }
118
119 get_author_ident_from_commit () {
120         pick_author_script='
121         /^author /{
122                 s/'\''/'\''\\'\'\''/g
123                 h
124                 s/^author \([^<]*\) <[^>]*> .*$/\1/
125                 s/'\''/'\''\'\'\''/g
126                 s/.*/GIT_AUTHOR_NAME='\''&'\''/p
127
128                 g
129                 s/^author [^<]* <\([^>]*\)> .*$/\1/
130                 s/'\''/'\''\'\'\''/g
131                 s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
132
133                 g
134                 s/^author [^<]* <[^>]*> \(.*\)$/\1/
135                 s/'\''/'\''\'\'\''/g
136                 s/.*/GIT_AUTHOR_DATE='\''&'\''/p
137
138                 q
139         }
140         '
141         encoding=$(git config i18n.commitencoding || echo UTF-8)
142         git show -s --pretty=raw --encoding="$encoding" "$1" -- |
143         LANG=C LC_ALL=C sed -ne "$pick_author_script"
144 }
145
146 # Make sure we are in a valid repository of a vintage we understand,
147 # if we require to be in a git repository.
148 if test -z "$NONGIT_OK"
149 then
150         GIT_DIR=$(git rev-parse --git-dir) || exit
151         if [ -z "$SUBDIRECTORY_OK" ]
152         then
153                 test -z "$(git rev-parse --show-cdup)" || {
154                         exit=$?
155                         echo >&2 "You need to run this command from the toplevel of the working tree."
156                         exit $exit
157                 }
158         fi
159         test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
160                 echo >&2 "Unable to determine absolute path of git directory"
161                 exit 1
162         }
163         : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
164 fi
165
166 # Fix some commands on Windows
167 case $(uname -s) in
168 *MINGW*)
169         # Windows has its own (incompatible) sort and find
170         sort () {
171                 /usr/bin/sort "$@"
172         }
173         find () {
174                 /usr/bin/find "$@"
175         }
176         ;;
177 esac