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1 | # This shell scriplet is meant to be included by other shell scripts | |
2 | # to set up some variables pointing at the normal git directories and | |
3 | # a few helper shell functions. | |
4 | ||
5 | # Having this variable in your environment would break scripts because | |
6 | # you would cause "cd" to be taken to unexpected places. If you | |
7 | # like CDPATH, define it for your interactive shell sessions without | |
8 | # exporting it. | |
9 | # But we protect ourselves from such a user mistake nevertheless. | |
10 | unset CDPATH | |
11 | ||
12 | # Similarly for IFS, but some shells (e.g. FreeBSD 7.2) are buggy and | |
13 | # do not equate an unset IFS with IFS with the default, so here is | |
14 | # an explicit SP HT LF. | |
15 | IFS=' | |
16 | ' | |
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 | # Source git-sh-i18n for gettext support. | |
47 | . "$(git --exec-path)/git-sh-i18n" | |
48 | ||
49 | die () { | |
50 | die_with_status 1 "$@" | |
51 | } | |
52 | ||
53 | die_with_status () { | |
54 | status=$1 | |
55 | shift | |
56 | printf >&2 '%s\n' "$*" | |
57 | exit "$status" | |
58 | } | |
59 | ||
60 | GIT_QUIET= | |
61 | ||
62 | say () { | |
63 | if test -z "$GIT_QUIET" | |
64 | then | |
65 | printf '%s\n' "$*" | |
66 | fi | |
67 | } | |
68 | ||
69 | if test -n "$OPTIONS_SPEC"; then | |
70 | usage() { | |
71 | "$0" -h | |
72 | exit 1 | |
73 | } | |
74 | ||
75 | parseopt_extra= | |
76 | [ -n "$OPTIONS_KEEPDASHDASH" ] && | |
77 | parseopt_extra="--keep-dashdash" | |
78 | [ -n "$OPTIONS_STUCKLONG" ] && | |
79 | parseopt_extra="$parseopt_extra --stuck-long" | |
80 | ||
81 | eval "$( | |
82 | echo "$OPTIONS_SPEC" | | |
83 | git rev-parse --parseopt $parseopt_extra -- "$@" || | |
84 | echo exit $? | |
85 | )" | |
86 | else | |
87 | dashless=$(basename -- "$0" | sed -e 's/-/ /') | |
88 | usage() { | |
89 | die "$(eval_gettext "usage: \$dashless \$USAGE")" | |
90 | } | |
91 | ||
92 | if [ -z "$LONG_USAGE" ] | |
93 | then | |
94 | LONG_USAGE="$(eval_gettext "usage: \$dashless \$USAGE")" | |
95 | else | |
96 | LONG_USAGE="$(eval_gettext "usage: \$dashless \$USAGE | |
97 | ||
98 | $LONG_USAGE")" | |
99 | fi | |
100 | ||
101 | case "$1" in | |
102 | -h) | |
103 | echo "$LONG_USAGE" | |
104 | case "$0" in *git-legacy-stash) exit 129;; esac | |
105 | exit | |
106 | esac | |
107 | fi | |
108 | ||
109 | # Set the name of the end-user facing command in the reflog when the | |
110 | # script may update refs. When GIT_REFLOG_ACTION is already set, this | |
111 | # will not overwrite it, so that a scripted Porcelain (e.g. "git | |
112 | # rebase") can set it to its own name (e.g. "rebase") and then call | |
113 | # another scripted Porcelain (e.g. "git am") and a call to this | |
114 | # function in the latter will keep the name of the end-user facing | |
115 | # program (e.g. "rebase") in GIT_REFLOG_ACTION, ensuring whatever it | |
116 | # does will be record as actions done as part of the end-user facing | |
117 | # operation (e.g. "rebase"). | |
118 | # | |
119 | # NOTE NOTE NOTE: consequently, after assigning a specific message to | |
120 | # GIT_REFLOG_ACTION when calling a "git" command to record a custom | |
121 | # reflog message, do not leave that custom value in GIT_REFLOG_ACTION, | |
122 | # after you are done. Other callers of "git" commands that rely on | |
123 | # writing the default "program name" in reflog expect the variable to | |
124 | # contain the value set by this function. | |
125 | # | |
126 | # To use a custom reflog message, do either one of these three: | |
127 | # | |
128 | # (a) use a single-shot export form: | |
129 | # GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" \ | |
130 | # git command-that-updates-a-ref | |
131 | # | |
132 | # (b) save the original away and restore: | |
133 | # SAVED_ACTION=$GIT_REFLOG_ACTION | |
134 | # GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" | |
135 | # git command-that-updates-a-ref | |
136 | # GIT_REFLOG_ACITON=$SAVED_ACTION | |
137 | # | |
138 | # (c) assign the variable in a subshell: | |
139 | # ( | |
140 | # GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" | |
141 | # git command-that-updates-a-ref | |
142 | # ) | |
143 | set_reflog_action() { | |
144 | if [ -z "${GIT_REFLOG_ACTION:+set}" ] | |
145 | then | |
146 | GIT_REFLOG_ACTION="$*" | |
147 | export GIT_REFLOG_ACTION | |
148 | fi | |
149 | } | |
150 | ||
151 | git_editor() { | |
152 | if test -z "${GIT_EDITOR:+set}" | |
153 | then | |
154 | GIT_EDITOR="$(git var GIT_EDITOR)" || return $? | |
155 | fi | |
156 | ||
157 | eval "$GIT_EDITOR" '"$@"' | |
158 | } | |
159 | ||
160 | git_pager() { | |
161 | if test -t 1 | |
162 | then | |
163 | GIT_PAGER=$(git var GIT_PAGER) | |
164 | else | |
165 | GIT_PAGER=cat | |
166 | fi | |
167 | for vardef in @@PAGER_ENV@@ | |
168 | do | |
169 | var=${vardef%%=*} | |
170 | eval ": \"\${$vardef}\" && export $var" | |
171 | done | |
172 | ||
173 | eval "$GIT_PAGER" '"$@"' | |
174 | } | |
175 | ||
176 | is_bare_repository () { | |
177 | git rev-parse --is-bare-repository | |
178 | } | |
179 | ||
180 | cd_to_toplevel () { | |
181 | cdup=$(git rev-parse --show-toplevel) && | |
182 | cd "$cdup" || { | |
183 | gettextln "Cannot chdir to \$cdup, the toplevel of the working tree" >&2 | |
184 | exit 1 | |
185 | } | |
186 | } | |
187 | ||
188 | require_work_tree_exists () { | |
189 | if test "z$(git rev-parse --is-bare-repository)" != zfalse | |
190 | then | |
191 | program_name=$0 | |
192 | die "$(eval_gettext "fatal: \$program_name cannot be used without a working tree.")" | |
193 | fi | |
194 | } | |
195 | ||
196 | require_work_tree () { | |
197 | test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true || { | |
198 | program_name=$0 | |
199 | die "$(eval_gettext "fatal: \$program_name cannot be used without a working tree.")" | |
200 | } | |
201 | } | |
202 | ||
203 | require_clean_work_tree () { | |
204 | git rev-parse --verify HEAD >/dev/null || exit 1 | |
205 | git update-index -q --ignore-submodules --refresh | |
206 | err=0 | |
207 | ||
208 | if ! git diff-files --quiet --ignore-submodules | |
209 | then | |
210 | action=$1 | |
211 | case "$action" in | |
212 | "rewrite branches") | |
213 | gettextln "Cannot rewrite branches: You have unstaged changes." >&2 | |
214 | ;; | |
215 | *) | |
216 | eval_gettextln "Cannot \$action: You have unstaged changes." >&2 | |
217 | ;; | |
218 | esac | |
219 | err=1 | |
220 | fi | |
221 | ||
222 | if ! git diff-index --cached --quiet --ignore-submodules HEAD -- | |
223 | then | |
224 | if test $err = 0 | |
225 | then | |
226 | action=$1 | |
227 | eval_gettextln "Cannot \$action: Your index contains uncommitted changes." >&2 | |
228 | else | |
229 | gettextln "Additionally, your index contains uncommitted changes." >&2 | |
230 | fi | |
231 | err=1 | |
232 | fi | |
233 | ||
234 | if test $err = 1 | |
235 | then | |
236 | test -n "$2" && echo "$2" >&2 | |
237 | exit 1 | |
238 | fi | |
239 | } | |
240 | ||
241 | # Generate a sed script to parse identities from a commit. | |
242 | # | |
243 | # Reads the commit from stdin, which should be in raw format (e.g., from | |
244 | # cat-file or "--pretty=raw"). | |
245 | # | |
246 | # The first argument specifies the ident line to parse (e.g., "author"), and | |
247 | # the second specifies the environment variable to put it in (e.g., "AUTHOR" | |
248 | # for "GIT_AUTHOR_*"). Multiple pairs can be given to parse author and | |
249 | # committer. | |
250 | pick_ident_script () { | |
251 | while test $# -gt 0 | |
252 | do | |
253 | lid=$1; shift | |
254 | uid=$1; shift | |
255 | printf '%s' " | |
256 | /^$lid /{ | |
257 | s/'/'\\\\''/g | |
258 | h | |
259 | s/^$lid "'\([^<]*\) <[^>]*> .*$/\1/'" | |
260 | s/.*/GIT_${uid}_NAME='&'/p | |
261 | ||
262 | g | |
263 | s/^$lid "'[^<]* <\([^>]*\)> .*$/\1/'" | |
264 | s/.*/GIT_${uid}_EMAIL='&'/p | |
265 | ||
266 | g | |
267 | s/^$lid "'[^<]* <[^>]*> \(.*\)$/@\1/'" | |
268 | s/.*/GIT_${uid}_DATE='&'/p | |
269 | } | |
270 | " | |
271 | done | |
272 | echo '/^$/q' | |
273 | } | |
274 | ||
275 | # Create a pick-script as above and feed it to sed. Stdout is suitable for | |
276 | # feeding to eval. | |
277 | parse_ident_from_commit () { | |
278 | LANG=C LC_ALL=C sed -ne "$(pick_ident_script "$@")" | |
279 | } | |
280 | ||
281 | # Parse the author from a commit given as an argument. Stdout is suitable for | |
282 | # feeding to eval to set the usual GIT_* ident variables. | |
283 | get_author_ident_from_commit () { | |
284 | encoding=$(git config i18n.commitencoding || echo UTF-8) | |
285 | git show -s --pretty=raw --encoding="$encoding" "$1" -- | | |
286 | parse_ident_from_commit author AUTHOR | |
287 | } | |
288 | ||
289 | # Clear repo-local GIT_* environment variables. Useful when switching to | |
290 | # another repository (e.g. when entering a submodule). See also the env | |
291 | # list in git_connect() | |
292 | clear_local_git_env() { | |
293 | unset $(git rev-parse --local-env-vars) | |
294 | } | |
295 | ||
296 | # Generate a virtual base file for a two-file merge. Uses git apply to | |
297 | # remove lines from $1 that are not in $2, leaving only common lines. | |
298 | create_virtual_base() { | |
299 | sz0=$(wc -c <"$1") | |
300 | @@DIFF@@ -u -La/"$1" -Lb/"$1" "$1" "$2" | git apply --no-add | |
301 | sz1=$(wc -c <"$1") | |
302 | ||
303 | # If we do not have enough common material, it is not | |
304 | # worth trying two-file merge using common subsections. | |
305 | expr $sz0 \< $sz1 \* 2 >/dev/null || : >"$1" | |
306 | } | |
307 | ||
308 | ||
309 | # Platform specific tweaks to work around some commands | |
310 | case $(uname -s) in | |
311 | *MINGW*) | |
312 | # Windows has its own (incompatible) sort and find | |
313 | sort () { | |
314 | /usr/bin/sort "$@" | |
315 | } | |
316 | find () { | |
317 | /usr/bin/find "$@" | |
318 | } | |
319 | # git sees Windows-style pwd | |
320 | pwd () { | |
321 | builtin pwd -W | |
322 | } | |
323 | is_absolute_path () { | |
324 | case "$1" in | |
325 | [/\\]* | [A-Za-z]:*) | |
326 | return 0 ;; | |
327 | esac | |
328 | return 1 | |
329 | } | |
330 | ;; | |
331 | *) | |
332 | is_absolute_path () { | |
333 | case "$1" in | |
334 | /*) | |
335 | return 0 ;; | |
336 | esac | |
337 | return 1 | |
338 | } | |
339 | esac | |
340 | ||
341 | # Make sure we are in a valid repository of a vintage we understand, | |
342 | # if we require to be in a git repository. | |
343 | git_dir_init () { | |
344 | GIT_DIR=$(git rev-parse --git-dir) || exit | |
345 | if [ -z "$SUBDIRECTORY_OK" ] | |
346 | then | |
347 | test -z "$(git rev-parse --show-cdup)" || { | |
348 | exit=$? | |
349 | gettextln "You need to run this command from the toplevel of the working tree." >&2 | |
350 | exit $exit | |
351 | } | |
352 | fi | |
353 | test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || { | |
354 | gettextln "Unable to determine absolute path of git directory" >&2 | |
355 | exit 1 | |
356 | } | |
357 | : "${GIT_OBJECT_DIRECTORY="$(git rev-parse --git-path objects)"}" | |
358 | } | |
359 | ||
360 | if test -z "$NONGIT_OK" | |
361 | then | |
362 | git_dir_init | |
363 | fi | |
364 | ||
365 | peel_committish () { | |
366 | case "$1" in | |
367 | :/*) | |
368 | peeltmp=$(git rev-parse --verify "$1") && | |
369 | git rev-parse --verify "${peeltmp}^0" | |
370 | ;; | |
371 | *) | |
372 | git rev-parse --verify "${1}^0" | |
373 | ;; | |
374 | esac | |
375 | } |