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Commit | Line | Data |
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1 | # git-mergetool--lib is a shell library for common merge tool functions | |
2 | ||
3 | : ${MERGE_TOOLS_DIR=$(git --exec-path)/mergetools} | |
4 | ||
5 | IFS=' | |
6 | ' | |
7 | ||
8 | mode_ok () { | |
9 | if diff_mode | |
10 | then | |
11 | can_diff | |
12 | elif merge_mode | |
13 | then | |
14 | can_merge | |
15 | else | |
16 | false | |
17 | fi | |
18 | } | |
19 | ||
20 | is_available () { | |
21 | merge_tool_path=$(translate_merge_tool_path "$1") && | |
22 | type "$merge_tool_path" >/dev/null 2>&1 | |
23 | } | |
24 | ||
25 | list_config_tools () { | |
26 | section=$1 | |
27 | line_prefix=${2:-} | |
28 | ||
29 | git config --get-regexp $section'\..*\.cmd' | | |
30 | while read -r key value | |
31 | do | |
32 | toolname=${key#$section.} | |
33 | toolname=${toolname%.cmd} | |
34 | ||
35 | printf "%s%s\n" "$line_prefix" "$toolname" | |
36 | done | |
37 | } | |
38 | ||
39 | show_tool_names () { | |
40 | condition=${1:-true} per_line_prefix=${2:-} preamble=${3:-} | |
41 | not_found_msg=${4:-} | |
42 | extra_content=${5:-} | |
43 | ||
44 | shown_any= | |
45 | ( cd "$MERGE_TOOLS_DIR" && ls ) | { | |
46 | while read scriptname | |
47 | do | |
48 | setup_tool "$scriptname" 2>/dev/null | |
49 | # We need an actual line feed here | |
50 | variants="$variants | |
51 | $(list_tool_variants)" | |
52 | done | |
53 | variants="$(echo "$variants" | sort -u)" | |
54 | ||
55 | for toolname in $variants | |
56 | do | |
57 | if setup_tool "$toolname" 2>/dev/null && | |
58 | (eval "$condition" "$toolname") | |
59 | then | |
60 | if test -n "$preamble" | |
61 | then | |
62 | printf "%s\n" "$preamble" | |
63 | preamble= | |
64 | fi | |
65 | shown_any=yes | |
66 | printf "%s%s\n" "$per_line_prefix" "$toolname" | |
67 | fi | |
68 | done | |
69 | ||
70 | if test -n "$extra_content" | |
71 | then | |
72 | if test -n "$preamble" | |
73 | then | |
74 | # Note: no '\n' here since we don't want a | |
75 | # blank line if there is no initial content. | |
76 | printf "%s" "$preamble" | |
77 | preamble= | |
78 | fi | |
79 | shown_any=yes | |
80 | printf "\n%s\n" "$extra_content" | |
81 | fi | |
82 | ||
83 | if test -n "$preamble" && test -n "$not_found_msg" | |
84 | then | |
85 | printf "%s\n" "$not_found_msg" | |
86 | fi | |
87 | ||
88 | test -n "$shown_any" | |
89 | } | |
90 | } | |
91 | ||
92 | diff_mode () { | |
93 | test "$TOOL_MODE" = diff | |
94 | } | |
95 | ||
96 | merge_mode () { | |
97 | test "$TOOL_MODE" = merge | |
98 | } | |
99 | ||
100 | gui_mode () { | |
101 | test "$GIT_MERGETOOL_GUI" = true | |
102 | } | |
103 | ||
104 | translate_merge_tool_path () { | |
105 | echo "$1" | |
106 | } | |
107 | ||
108 | check_unchanged () { | |
109 | if test "$MERGED" -nt "$BACKUP" | |
110 | then | |
111 | return 0 | |
112 | else | |
113 | while true | |
114 | do | |
115 | echo "$MERGED seems unchanged." | |
116 | printf "Was the merge successful [y/n]? " | |
117 | read answer || return 1 | |
118 | case "$answer" in | |
119 | y*|Y*) return 0 ;; | |
120 | n*|N*) return 1 ;; | |
121 | esac | |
122 | done | |
123 | fi | |
124 | } | |
125 | ||
126 | valid_tool () { | |
127 | setup_tool "$1" && return 0 | |
128 | cmd=$(get_merge_tool_cmd "$1") | |
129 | test -n "$cmd" | |
130 | } | |
131 | ||
132 | setup_user_tool () { | |
133 | merge_tool_cmd=$(get_merge_tool_cmd "$tool") | |
134 | test -n "$merge_tool_cmd" || return 1 | |
135 | ||
136 | diff_cmd () { | |
137 | ( eval $merge_tool_cmd ) | |
138 | } | |
139 | ||
140 | merge_cmd () { | |
141 | ( eval $merge_tool_cmd ) | |
142 | } | |
143 | ||
144 | list_tool_variants () { | |
145 | echo "$tool" | |
146 | } | |
147 | } | |
148 | ||
149 | setup_tool () { | |
150 | tool="$1" | |
151 | ||
152 | # Fallback definitions, to be overridden by tools. | |
153 | can_merge () { | |
154 | return 0 | |
155 | } | |
156 | ||
157 | can_diff () { | |
158 | return 0 | |
159 | } | |
160 | ||
161 | diff_cmd () { | |
162 | return 1 | |
163 | } | |
164 | ||
165 | merge_cmd () { | |
166 | return 1 | |
167 | } | |
168 | ||
169 | hide_resolved_enabled () { | |
170 | return 0 | |
171 | } | |
172 | ||
173 | translate_merge_tool_path () { | |
174 | echo "$1" | |
175 | } | |
176 | ||
177 | list_tool_variants () { | |
178 | echo "$tool" | |
179 | } | |
180 | ||
181 | # Most tools' exit codes cannot be trusted, so By default we ignore | |
182 | # their exit code and check the merged file's modification time in | |
183 | # check_unchanged() to determine whether or not the merge was | |
184 | # successful. The return value from run_merge_cmd, by default, is | |
185 | # determined by check_unchanged(). | |
186 | # | |
187 | # When a tool's exit code can be trusted then the return value from | |
188 | # run_merge_cmd is simply the tool's exit code, and check_unchanged() | |
189 | # is not called. | |
190 | # | |
191 | # The return value of exit_code_trustable() tells us whether or not we | |
192 | # can trust the tool's exit code. | |
193 | # | |
194 | # User-defined and built-in tools default to false. | |
195 | # Built-in tools advertise that their exit code is trustable by | |
196 | # redefining exit_code_trustable() to true. | |
197 | ||
198 | exit_code_trustable () { | |
199 | false | |
200 | } | |
201 | ||
202 | if test -f "$MERGE_TOOLS_DIR/$tool" | |
203 | then | |
204 | . "$MERGE_TOOLS_DIR/$tool" | |
205 | elif test -f "$MERGE_TOOLS_DIR/${tool%[0-9]}" | |
206 | then | |
207 | . "$MERGE_TOOLS_DIR/${tool%[0-9]}" | |
208 | else | |
209 | setup_user_tool | |
210 | return $? | |
211 | fi | |
212 | ||
213 | # Now let the user override the default command for the tool. If | |
214 | # they have not done so then this will return 1 which we ignore. | |
215 | setup_user_tool | |
216 | ||
217 | if ! list_tool_variants | grep -q "^$tool$" | |
218 | then | |
219 | return 1 | |
220 | fi | |
221 | ||
222 | if merge_mode && ! can_merge | |
223 | then | |
224 | echo "error: '$tool' can not be used to resolve merges" >&2 | |
225 | return 1 | |
226 | elif diff_mode && ! can_diff | |
227 | then | |
228 | echo "error: '$tool' can only be used to resolve merges" >&2 | |
229 | return 1 | |
230 | fi | |
231 | return 0 | |
232 | } | |
233 | ||
234 | get_merge_tool_cmd () { | |
235 | merge_tool="$1" | |
236 | if diff_mode | |
237 | then | |
238 | git config "difftool.$merge_tool.cmd" || | |
239 | git config "mergetool.$merge_tool.cmd" | |
240 | else | |
241 | git config "mergetool.$merge_tool.cmd" | |
242 | fi | |
243 | } | |
244 | ||
245 | trust_exit_code () { | |
246 | if git config --bool "mergetool.$1.trustExitCode" | |
247 | then | |
248 | :; # OK | |
249 | elif exit_code_trustable | |
250 | then | |
251 | echo true | |
252 | else | |
253 | echo false | |
254 | fi | |
255 | } | |
256 | ||
257 | initialize_merge_tool () { | |
258 | # Bring tool-specific functions into scope | |
259 | setup_tool "$1" || return 1 | |
260 | } | |
261 | ||
262 | # Entry point for running tools | |
263 | run_merge_tool () { | |
264 | # If GIT_PREFIX is empty then we cannot use it in tools | |
265 | # that expect to be able to chdir() to its value. | |
266 | GIT_PREFIX=${GIT_PREFIX:-.} | |
267 | export GIT_PREFIX | |
268 | ||
269 | merge_tool_path=$(get_merge_tool_path "$1") || exit | |
270 | base_present="$2" | |
271 | ||
272 | if merge_mode | |
273 | then | |
274 | run_merge_cmd "$1" | |
275 | else | |
276 | run_diff_cmd "$1" | |
277 | fi | |
278 | } | |
279 | ||
280 | # Run a either a configured or built-in diff tool | |
281 | run_diff_cmd () { | |
282 | diff_cmd "$1" | |
283 | } | |
284 | ||
285 | # Run a either a configured or built-in merge tool | |
286 | run_merge_cmd () { | |
287 | mergetool_trust_exit_code=$(trust_exit_code "$1") | |
288 | if test "$mergetool_trust_exit_code" = "true" | |
289 | then | |
290 | merge_cmd "$1" | |
291 | else | |
292 | touch "$BACKUP" | |
293 | merge_cmd "$1" | |
294 | check_unchanged | |
295 | fi | |
296 | } | |
297 | ||
298 | list_merge_tool_candidates () { | |
299 | if merge_mode | |
300 | then | |
301 | tools="tortoisemerge" | |
302 | else | |
303 | tools="kompare" | |
304 | fi | |
305 | if test -n "$DISPLAY" | |
306 | then | |
307 | if test -n "$GNOME_DESKTOP_SESSION_ID" | |
308 | then | |
309 | tools="meld opendiff kdiff3 tkdiff xxdiff $tools" | |
310 | else | |
311 | tools="opendiff kdiff3 tkdiff xxdiff meld $tools" | |
312 | fi | |
313 | tools="$tools gvimdiff diffuse diffmerge ecmerge" | |
314 | tools="$tools p4merge araxis bc codecompare" | |
315 | tools="$tools smerge" | |
316 | fi | |
317 | case "${VISUAL:-$EDITOR}" in | |
318 | *nvim*) | |
319 | tools="$tools nvimdiff vimdiff emerge" | |
320 | ;; | |
321 | *vim*) | |
322 | tools="$tools vimdiff nvimdiff emerge" | |
323 | ;; | |
324 | *) | |
325 | tools="$tools emerge vimdiff nvimdiff" | |
326 | ;; | |
327 | esac | |
328 | } | |
329 | ||
330 | show_tool_help () { | |
331 | tool_opt="'git ${TOOL_MODE}tool --tool=<tool>'" | |
332 | ||
333 | tab=' ' | |
334 | LF=' | |
335 | ' | |
336 | any_shown=no | |
337 | ||
338 | cmd_name=${TOOL_MODE}tool | |
339 | config_tools=$({ | |
340 | diff_mode && list_config_tools difftool "$tab$tab" | |
341 | list_config_tools mergetool "$tab$tab" | |
342 | } | sort) | |
343 | extra_content= | |
344 | if test -n "$config_tools" | |
345 | then | |
346 | extra_content="${tab}user-defined:${LF}$config_tools" | |
347 | fi | |
348 | ||
349 | show_tool_names 'mode_ok && is_available' "$tab$tab" \ | |
350 | "$tool_opt may be set to one of the following:" \ | |
351 | "No suitable tool for 'git $cmd_name --tool=<tool>' found." \ | |
352 | "$extra_content" && | |
353 | any_shown=yes | |
354 | ||
355 | show_tool_names 'mode_ok && ! is_available' "$tab$tab" \ | |
356 | "${LF}The following tools are valid, but not currently available:" && | |
357 | any_shown=yes | |
358 | ||
359 | if test "$any_shown" = yes | |
360 | then | |
361 | echo | |
362 | echo "Some of the tools listed above only work in a windowed" | |
363 | echo "environment. If run in a terminal-only session, they will fail." | |
364 | fi | |
365 | exit 0 | |
366 | } | |
367 | ||
368 | guess_merge_tool () { | |
369 | list_merge_tool_candidates | |
370 | cat >&2 <<-EOF | |
371 | ||
372 | This message is displayed because '$TOOL_MODE.tool' is not configured. | |
373 | See 'git ${TOOL_MODE}tool --tool-help' or 'git help config' for more details. | |
374 | 'git ${TOOL_MODE}tool' will now attempt to use one of the following tools: | |
375 | $tools | |
376 | EOF | |
377 | ||
378 | # Loop over each candidate and stop when a valid merge tool is found. | |
379 | IFS=' ' | |
380 | for tool in $tools | |
381 | do | |
382 | is_available "$tool" && echo "$tool" && return 0 | |
383 | done | |
384 | ||
385 | echo >&2 "No known ${TOOL_MODE} tool is available." | |
386 | return 1 | |
387 | } | |
388 | ||
389 | get_configured_merge_tool () { | |
390 | keys= | |
391 | if diff_mode | |
392 | then | |
393 | if gui_mode | |
394 | then | |
395 | keys="diff.guitool merge.guitool diff.tool merge.tool" | |
396 | else | |
397 | keys="diff.tool merge.tool" | |
398 | fi | |
399 | else | |
400 | if gui_mode | |
401 | then | |
402 | keys="merge.guitool merge.tool" | |
403 | else | |
404 | keys="merge.tool" | |
405 | fi | |
406 | fi | |
407 | ||
408 | merge_tool=$( | |
409 | IFS=' ' | |
410 | for key in $keys | |
411 | do | |
412 | selected=$(git config $key) | |
413 | if test -n "$selected" | |
414 | then | |
415 | echo "$selected" | |
416 | return | |
417 | fi | |
418 | done) | |
419 | ||
420 | if test -n "$merge_tool" && ! valid_tool "$merge_tool" | |
421 | then | |
422 | echo >&2 "git config option $TOOL_MODE.${gui_prefix}tool set to unknown tool: $merge_tool" | |
423 | echo >&2 "Resetting to default..." | |
424 | return 1 | |
425 | fi | |
426 | echo "$merge_tool" | |
427 | } | |
428 | ||
429 | get_merge_tool_path () { | |
430 | # A merge tool has been set, so verify that it's valid. | |
431 | merge_tool="$1" | |
432 | if ! valid_tool "$merge_tool" | |
433 | then | |
434 | echo >&2 "Unknown merge tool $merge_tool" | |
435 | exit 1 | |
436 | fi | |
437 | if diff_mode | |
438 | then | |
439 | merge_tool_path=$(git config difftool."$merge_tool".path || | |
440 | git config mergetool."$merge_tool".path) | |
441 | else | |
442 | merge_tool_path=$(git config mergetool."$merge_tool".path) | |
443 | fi | |
444 | if test -z "$merge_tool_path" | |
445 | then | |
446 | merge_tool_path=$(translate_merge_tool_path "$merge_tool") | |
447 | fi | |
448 | if test -z "$(get_merge_tool_cmd "$merge_tool")" && | |
449 | ! type "$merge_tool_path" >/dev/null 2>&1 | |
450 | then | |
451 | echo >&2 "The $TOOL_MODE tool $merge_tool is not available as"\ | |
452 | "'$merge_tool_path'" | |
453 | exit 1 | |
454 | fi | |
455 | echo "$merge_tool_path" | |
456 | } | |
457 | ||
458 | get_merge_tool () { | |
459 | is_guessed=false | |
460 | # Check if a merge tool has been configured | |
461 | merge_tool=$(get_configured_merge_tool) | |
462 | # Try to guess an appropriate merge tool if no tool has been set. | |
463 | if test -z "$merge_tool" | |
464 | then | |
465 | merge_tool=$(guess_merge_tool) || exit | |
466 | is_guessed=true | |
467 | fi | |
468 | echo "$merge_tool" | |
469 | test "$is_guessed" = false | |
470 | } | |
471 | ||
472 | mergetool_find_win32_cmd () { | |
473 | executable=$1 | |
474 | sub_directory=$2 | |
475 | ||
476 | # Use $executable if it exists in $PATH | |
477 | if type -p "$executable" >/dev/null 2>&1 | |
478 | then | |
479 | printf '%s' "$executable" | |
480 | return | |
481 | fi | |
482 | ||
483 | # Look for executable in the typical locations | |
484 | for directory in $(env | grep -Ei '^PROGRAM(FILES(\(X86\))?|W6432)=' | | |
485 | cut -d '=' -f 2- | sort -u) | |
486 | do | |
487 | if test -n "$directory" && test -x "$directory/$sub_directory/$executable" | |
488 | then | |
489 | printf '%s' "$directory/$sub_directory/$executable" | |
490 | return | |
491 | fi | |
492 | done | |
493 | ||
494 | printf '%s' "$executable" | |
495 | } |