summaryrefslogtreecommitdiff
path: root/advice.c
blob: d6232439c3863b4c6136adfd12465b0aa714e81f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
#include "git-compat-util.h"
#include "advice.h"
#include "config.h"
#include "color.h"
#include "gettext.h"
#include "help.h"
#include "string-list.h"

static int advice_use_color = -1;
static char advice_colors[][COLOR_MAXLEN] = {
	GIT_COLOR_RESET,
	GIT_COLOR_YELLOW,	/* HINT */
};

enum color_advice {
	ADVICE_COLOR_RESET = 0,
	ADVICE_COLOR_HINT = 1,
};

static int parse_advise_color_slot(const char *slot)
{
	if (!strcasecmp(slot, "reset"))
		return ADVICE_COLOR_RESET;
	if (!strcasecmp(slot, "hint"))
		return ADVICE_COLOR_HINT;
	return -1;
}

static const char *advise_get_color(enum color_advice ix)
{
	if (want_color_stderr(advice_use_color))
		return advice_colors[ix];
	return "";
}

static struct {
	const char *key;
	int enabled;
} advice_setting[] = {
	[ADVICE_ADD_EMBEDDED_REPO]			= { "addEmbeddedRepo", 1 },
	[ADVICE_ADD_EMPTY_PATHSPEC]			= { "addEmptyPathspec", 1 },
	[ADVICE_ADD_IGNORED_FILE]			= { "addIgnoredFile", 1 },
	[ADVICE_AM_WORK_DIR] 				= { "amWorkDir", 1 },
	[ADVICE_AMBIGUOUS_FETCH_REFSPEC]		= { "ambiguousFetchRefspec", 1 },
	[ADVICE_CHECKOUT_AMBIGUOUS_REMOTE_BRANCH_NAME] 	= { "checkoutAmbiguousRemoteBranchName", 1 },
	[ADVICE_COMMIT_BEFORE_MERGE]			= { "commitBeforeMerge", 1 },
	[ADVICE_DETACHED_HEAD]				= { "detachedHead", 1 },
	[ADVICE_SUGGEST_DETACHING_HEAD]			= { "suggestDetachingHead", 1 },
	[ADVICE_DIVERGING]				= { "diverging", 1 },
	[ADVICE_FETCH_SHOW_FORCED_UPDATES]		= { "fetchShowForcedUpdates", 1 },
	[ADVICE_GRAFT_FILE_DEPRECATED]			= { "graftFileDeprecated", 1 },
	[ADVICE_IGNORED_HOOK]				= { "ignoredHook", 1 },
	[ADVICE_IMPLICIT_IDENTITY]			= { "implicitIdentity", 1 },
	[ADVICE_NESTED_TAG]				= { "nestedTag", 1 },
	[ADVICE_OBJECT_NAME_WARNING]			= { "objectNameWarning", 1 },
	[ADVICE_PUSH_ALREADY_EXISTS]			= { "pushAlreadyExists", 1 },
	[ADVICE_PUSH_FETCH_FIRST]			= { "pushFetchFirst", 1 },
	[ADVICE_PUSH_NEEDS_FORCE]			= { "pushNeedsForce", 1 },
	[ADVICE_PUSH_REF_NEEDS_UPDATE]			= { "pushRefNeedsUpdate", 1 },

	/* make this an alias for backward compatibility */
	[ADVICE_PUSH_UPDATE_REJECTED_ALIAS]		= { "pushNonFastForward", 1 },

	[ADVICE_PUSH_NON_FF_CURRENT]			= { "pushNonFFCurrent", 1 },
	[ADVICE_PUSH_NON_FF_MATCHING]			= { "pushNonFFMatching", 1 },
	[ADVICE_PUSH_UNQUALIFIED_REF_NAME]		= { "pushUnqualifiedRefName", 1 },
	[ADVICE_PUSH_UPDATE_REJECTED]			= { "pushUpdateRejected", 1 },
	[ADVICE_RESET_NO_REFRESH_WARNING]		= { "resetNoRefresh", 1 },
	[ADVICE_RESOLVE_CONFLICT]			= { "resolveConflict", 1 },
	[ADVICE_RM_HINTS]				= { "rmHints", 1 },
	[ADVICE_SEQUENCER_IN_USE]			= { "sequencerInUse", 1 },
	[ADVICE_SET_UPSTREAM_FAILURE]			= { "setUpstreamFailure", 1 },
	[ADVICE_SKIPPED_CHERRY_PICKS]			= { "skippedCherryPicks", 1 },
	[ADVICE_STATUS_AHEAD_BEHIND_WARNING]		= { "statusAheadBehindWarning", 1 },
	[ADVICE_STATUS_HINTS]				= { "statusHints", 1 },
	[ADVICE_STATUS_U_OPTION]			= { "statusUoption", 1 },
	[ADVICE_SUBMODULE_ALTERNATE_ERROR_STRATEGY_DIE] = { "submoduleAlternateErrorStrategyDie", 1 },
	[ADVICE_SUBMODULES_NOT_UPDATED] 		= { "submodulesNotUpdated", 1 },
	[ADVICE_UPDATE_SPARSE_PATH]			= { "updateSparsePath", 1 },
	[ADVICE_WAITING_FOR_EDITOR]			= { "waitingForEditor", 1 },
};

static const char turn_off_instructions[] =
N_("\n"
   "Disable this message with \"git config advice.%s false\"");

static void vadvise(const char *advice, int display_instructions,
		    const char *key, va_list params)
{
	struct strbuf buf = STRBUF_INIT;
	const char *cp, *np;

	strbuf_vaddf(&buf, advice, params);

	if (display_instructions)
		strbuf_addf(&buf, turn_off_instructions, key);

	for (cp = buf.buf; *cp; cp = np) {
		np = strchrnul(cp, '\n');
		fprintf(stderr,	_("%shint: %.*s%s\n"),
			advise_get_color(ADVICE_COLOR_HINT),
			(int)(np - cp), cp,
			advise_get_color(ADVICE_COLOR_RESET));
		if (*np)
			np++;
	}
	strbuf_release(&buf);
}

void advise(const char *advice, ...)
{
	va_list params;
	va_start(params, advice);
	vadvise(advice, 0, "", params);
	va_end(params);
}

int advice_enabled(enum advice_type type)
{
	switch(type) {
	case ADVICE_PUSH_UPDATE_REJECTED:
		return advice_setting[ADVICE_PUSH_UPDATE_REJECTED].enabled &&
		       advice_setting[ADVICE_PUSH_UPDATE_REJECTED_ALIAS].enabled;
	default:
		return advice_setting[type].enabled;
	}
}

void advise_if_enabled(enum advice_type type, const char *advice, ...)
{
	va_list params;

	if (!advice_enabled(type))
		return;

	va_start(params, advice);
	vadvise(advice, 1, advice_setting[type].key, params);
	va_end(params);
}

int git_default_advice_config(const char *var, const char *value)
{
	const char *k, *slot_name;
	int i;

	if (!strcmp(var, "color.advice")) {
		advice_use_color = git_config_colorbool(var, value);
		return 0;
	}

	if (skip_prefix(var, "color.advice.", &slot_name)) {
		int slot = parse_advise_color_slot(slot_name);
		if (slot < 0)
			return 0;
		if (!value)
			return config_error_nonbool(var);
		return color_parse(value, advice_colors[slot]);
	}

	if (!skip_prefix(var, "advice.", &k))
		return 0;

	for (i = 0; i < ARRAY_SIZE(advice_setting); i++) {
		if (strcasecmp(k, advice_setting[i].key))
			continue;
		advice_setting[i].enabled = git_config_bool(var, value);
		return 0;
	}

	return 0;
}

void list_config_advices(struct string_list *list, const char *prefix)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(advice_setting); i++)
		list_config_item(list, prefix, advice_setting[i].key);
}

int error_resolve_conflict(const char *me)
{
	if (!strcmp(me, "cherry-pick"))
		error(_("Cherry-picking is not possible because you have unmerged files."));
	else if (!strcmp(me, "commit"))
		error(_("Committing is not possible because you have unmerged files."));
	else if (!strcmp(me, "merge"))
		error(_("Merging is not possible because you have unmerged files."));
	else if (!strcmp(me, "pull"))
		error(_("Pulling is not possible because you have unmerged files."));
	else if (!strcmp(me, "revert"))
		error(_("Reverting is not possible because you have unmerged files."));
	else
		error(_("It is not possible to %s because you have unmerged files."),
			me);

	if (advice_enabled(ADVICE_RESOLVE_CONFLICT))
		/*
		 * Message used both when 'git commit' fails and when
		 * other commands doing a merge do.
		 */
		advise(_("Fix them up in the work tree, and then use 'git add/rm <file>'\n"
			 "as appropriate to mark resolution and make a commit."));
	return -1;
}

void NORETURN die_resolve_conflict(const char *me)
{
	error_resolve_conflict(me);
	die(_("Exiting because of an unresolved conflict."));
}

void NORETURN die_conclude_merge(void)
{
	error(_("You have not concluded your merge (MERGE_HEAD exists)."));
	if (advice_enabled(ADVICE_RESOLVE_CONFLICT))
		advise(_("Please, commit your changes before merging."));
	die(_("Exiting because of unfinished merge."));
}

void NORETURN die_ff_impossible(void)
{
	advise_if_enabled(ADVICE_DIVERGING,
		_("Diverging branches can't be fast-forwarded, you need to either:\n"
		"\n"
		"\tgit merge --no-ff\n"
		"\n"
		"or:\n"
		"\n"
		"\tgit rebase\n"));
	die(_("Not possible to fast-forward, aborting."));
}

void advise_on_updating_sparse_paths(struct string_list *pathspec_list)
{
	struct string_list_item *item;

	if (!pathspec_list->nr)
		return;

	fprintf(stderr, _("The following paths and/or pathspecs matched paths that exist\n"
			  "outside of your sparse-checkout definition, so will not be\n"
			  "updated in the index:\n"));
	for_each_string_list_item(item, pathspec_list)
		fprintf(stderr, "%s\n", item->string);

	advise_if_enabled(ADVICE_UPDATE_SPARSE_PATH,
			  _("If you intend to update such entries, try one of the following:\n"
			    "* Use the --sparse option.\n"
			    "* Disable or modify the sparsity rules."));
}

void detach_advice(const char *new_name)
{
	const char *fmt =
	_("Note: switching to '%s'.\n"
	"\n"
	"You are in 'detached HEAD' state. You can look around, make experimental\n"
	"changes and commit them, and you can discard any commits you make in this\n"
	"state without impacting any branches by switching back to a branch.\n"
	"\n"
	"If you want to create a new branch to retain commits you create, you may\n"
	"do so (now or later) by using -c with the switch command. Example:\n"
	"\n"
	"  git switch -c <new-branch-name>\n"
	"\n"
	"Or undo this operation with:\n"
	"\n"
	"  git switch -\n"
	"\n"
	"Turn off this advice by setting config variable advice.detachedHead to false\n\n");

	fprintf(stderr, fmt, new_name);
}

void advise_on_moving_dirty_path(struct string_list *pathspec_list)
{
	struct string_list_item *item;

	if (!pathspec_list->nr)
		return;

	fprintf(stderr, _("The following paths have been moved outside the\n"
			  "sparse-checkout definition but are not sparse due to local\n"
			  "modifications.\n"));
	for_each_string_list_item(item, pathspec_list)
		fprintf(stderr, "%s\n", item->string);

	advise_if_enabled(ADVICE_UPDATE_SPARSE_PATH,
			  _("To correct the sparsity of these paths, do the following:\n"
			    "* Use \"git add --sparse <paths>\" to update the index\n"
			    "* Use \"git sparse-checkout reapply\" to apply the sparsity rules"));
}