Merge branch 'nd/grep-true-path' 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 # But we protect ourselves from such a user mistake nevertheless.
13 unset CDPATH
14
15 # Similarly for IFS
16 unset IFS
17
18 git_broken_path_fix () {
19         case ":$PATH:" in
20         *:$1:*) : ok ;;
21         *)
22                 PATH=$(
23                         SANE_TOOL_PATH="$1"
24                         IFS=: path= sep=
25                         set x $PATH
26                         shift
27                         for elem
28                         do
29                                 case "$SANE_TOOL_PATH:$elem" in
30                                 (?*:/bin | ?*:/usr/bin)
31                                         path="$path$sep$SANE_TOOL_PATH"
32                                         sep=:
33                                         SANE_TOOL_PATH=
34                                 esac
35                                 path="$path$sep$elem"
36                                 sep=:
37                         done
38                         echo "$path"
39                 )
40                 ;;
41         esac
42 }
43
44 # @@BROKEN_PATH_FIX@@
45
46 die () {
47         die_with_status 1 "$@"
48 }
49
50 die_with_status () {
51         status=$1
52         shift
53         echo >&2 "$*"
54         exit "$status"
55 }
56
57 GIT_QUIET=
58
59 say () {
60         if test -z "$GIT_QUIET"
61         then
62                 printf '%s\n' "$*"
63         fi
64 }
65
66 if test -n "$OPTIONS_SPEC"; then
67         usage() {
68                 "$0" -h
69                 exit 1
70         }
71
72         parseopt_extra=
73         [ -n "$OPTIONS_KEEPDASHDASH" ] &&
74                 parseopt_extra="--keep-dashdash"
75
76         eval "$(
77                 echo "$OPTIONS_SPEC" |
78                         git rev-parse --parseopt $parseopt_extra -- "$@" ||
79                 echo exit $?
80         )"
81 else
82         dashless=$(basename "$0" | sed -e 's/-/ /')
83         usage() {
84                 die "Usage: $dashless $USAGE"
85         }
86
87         if [ -z "$LONG_USAGE" ]
88         then
89                 LONG_USAGE="Usage: $dashless $USAGE"
90         else
91                 LONG_USAGE="Usage: $dashless $USAGE
92
93 $LONG_USAGE"
94         fi
95
96         case "$1" in
97                 -h)
98                 echo "$LONG_USAGE"
99                 exit
100         esac
101 fi
102
103 set_reflog_action() {
104         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
105         then
106                 GIT_REFLOG_ACTION="$*"
107                 export GIT_REFLOG_ACTION
108         fi
109 }
110
111 git_editor() {
112         if test -z "${GIT_EDITOR:+set}"
113         then
114                 GIT_EDITOR="$(git var GIT_EDITOR)" || return $?
115         fi
116
117         eval "$GIT_EDITOR" '"$@"'
118 }
119
120 git_pager() {
121         if test -t 1
122         then
123                 GIT_PAGER=$(git var GIT_PAGER)
124         else
125                 GIT_PAGER=cat
126         fi
127         : ${LESS=-FRSX}
128         export LESS
129
130         eval "$GIT_PAGER" '"$@"'
131 }
132
133 sane_grep () {
134         GREP_OPTIONS= LC_ALL=C grep "$@"
135 }
136
137 sane_egrep () {
138         GREP_OPTIONS= LC_ALL=C egrep "$@"
139 }
140
141 is_bare_repository () {
142         git rev-parse --is-bare-repository
143 }
144
145 cd_to_toplevel () {
146         cdup=$(git rev-parse --show-toplevel) &&
147         cd "$cdup" || {
148                 echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
149                 exit 1
150         }
151 }
152
153 require_work_tree_exists () {
154         if test "z$(git rev-parse --is-bare-repository)" != zfalse
155         then
156                 die "fatal: $0 cannot be used without a working tree."
157         fi
158 }
159
160 require_work_tree () {
161         test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
162         die "fatal: $0 cannot be used without a working tree."
163 }
164
165 require_clean_work_tree () {
166         git rev-parse --verify HEAD >/dev/null || exit 1
167         git update-index -q --ignore-submodules --refresh
168         err=0
169
170         if ! git diff-files --quiet --ignore-submodules
171         then
172                 echo >&2 "Cannot $1: You have unstaged changes."
173                 err=1
174         fi
175
176         if ! git diff-index --cached --quiet --ignore-submodules HEAD --
177         then
178                 if [ $err = 0 ]
179                 then
180                     echo >&2 "Cannot $1: Your index contains uncommitted changes."
181                 else
182                     echo >&2 "Additionally, your index contains uncommitted changes."
183                 fi
184                 err=1
185         fi
186
187         if [ $err = 1 ]
188         then
189                 test -n "$2" && echo >&2 "$2"
190                 exit 1
191         fi
192 }
193
194 get_author_ident_from_commit () {
195         pick_author_script='
196         /^author /{
197                 s/'\''/'\''\\'\'\''/g
198                 h
199                 s/^author \([^<]*\) <[^>]*> .*$/\1/
200                 s/.*/GIT_AUTHOR_NAME='\''&'\''/p
201
202                 g
203                 s/^author [^<]* <\([^>]*\)> .*$/\1/
204                 s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
205
206                 g
207                 s/^author [^<]* <[^>]*> \(.*\)$/@\1/
208                 s/.*/GIT_AUTHOR_DATE='\''&'\''/p
209
210                 q
211         }
212         '
213         encoding=$(git config i18n.commitencoding || echo UTF-8)
214         git show -s --pretty=raw --encoding="$encoding" "$1" -- |
215         LANG=C LC_ALL=C sed -ne "$pick_author_script"
216 }
217
218 # Clear repo-local GIT_* environment variables. Useful when switching to
219 # another repository (e.g. when entering a submodule). See also the env
220 # list in git_connect()
221 clear_local_git_env() {
222         unset $(git rev-parse --local-env-vars)
223 }
224
225
226 # Platform specific tweaks to work around some commands
227 case $(uname -s) in
228 *MINGW*)
229         # Windows has its own (incompatible) sort and find
230         sort () {
231                 /usr/bin/sort "$@"
232         }
233         find () {
234                 /usr/bin/find "$@"
235         }
236         # git sees Windows-style pwd
237         pwd () {
238                 builtin pwd -W
239         }
240         is_absolute_path () {
241                 case "$1" in
242                 [/\\]* | [A-Za-z]:*)
243                         return 0 ;;
244                 esac
245                 return 1
246         }
247         ;;
248 *)
249         is_absolute_path () {
250                 case "$1" in
251                 /*)
252                         return 0 ;;
253                 esac
254                 return 1
255         }
256 esac
257
258 # Make sure we are in a valid repository of a vintage we understand,
259 # if we require to be in a git repository.
260 if test -z "$NONGIT_OK"
261 then
262         GIT_DIR=$(git rev-parse --git-dir) || exit
263         if [ -z "$SUBDIRECTORY_OK" ]
264         then
265                 test -z "$(git rev-parse --show-cdup)" || {
266                         exit=$?
267                         echo >&2 "You need to run this command from the toplevel of the working tree."
268                         exit $exit
269                 }
270         fi
271         test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
272                 echo >&2 "Unable to determine absolute path of git directory"
273                 exit 1
274         }
275         : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
276 fi