advice.c

   1 #include "cache.h"
   2 #include "config.h"
   3 #include "color.h"
   4 #include "help.h"
   5 #include "string-list.h"
   6
   7 static int advice_use_color = -1;
   8 static char advice_colors[][COLOR_MAXLEN] = {
   9         GIT_COLOR_RESET,
  10         GIT_COLOR_YELLOW,       /* HINT */
  11 };
  12
  13 enum color_advice {
  14         ADVICE_COLOR_RESET = 0,
  15         ADVICE_COLOR_HINT = 1,
  16 };
  17
  18 static int parse_advise_color_slot(const char *slot)
  19 {
  20         if (!strcasecmp(slot, "reset"))
  21                 return ADVICE_COLOR_RESET;
  22         if (!strcasecmp(slot, "hint"))
  23                 return ADVICE_COLOR_HINT;
  24         return -1;
  25 }
  26
  27 static const char *advise_get_color(enum color_advice ix)
  28 {
  29         if (want_color_stderr(advice_use_color))
  30                 return advice_colors[ix];
  31         return "";
  32 }
  33
  34 static struct {
  35         const char *key;
  36         int enabled;
  37 } advice_setting[] = {
  38         [ADVICE_ADD_EMBEDDED_REPO]                      = { "addEmbeddedRepo", 1 },
  39         [ADVICE_ADD_EMPTY_PATHSPEC]                     = { "addEmptyPathspec", 1 },
  40         [ADVICE_ADD_IGNORED_FILE]                       = { "addIgnoredFile", 1 },
  41         [ADVICE_AM_WORK_DIR]                            = { "amWorkDir", 1 },
  42         [ADVICE_AMBIGUOUS_FETCH_REFSPEC]                = { "ambiguousFetchRefspec", 1 },
  43         [ADVICE_CHECKOUT_AMBIGUOUS_REMOTE_BRANCH_NAME]  = { "checkoutAmbiguousRemoteBranchName", 1 },
  44         [ADVICE_COMMIT_BEFORE_MERGE]                    = { "commitBeforeMerge", 1 },
  45         [ADVICE_DETACHED_HEAD]                          = { "detachedHead", 1 },
  46         [ADVICE_SUGGEST_DETACHING_HEAD]                 = { "suggestDetachingHead", 1 },
  47         [ADVICE_FETCH_SHOW_FORCED_UPDATES]              = { "fetchShowForcedUpdates", 1 },
  48         [ADVICE_GRAFT_FILE_DEPRECATED]                  = { "graftFileDeprecated", 1 },
  49         [ADVICE_IGNORED_HOOK]                           = { "ignoredHook", 1 },
  50         [ADVICE_IMPLICIT_IDENTITY]                      = { "implicitIdentity", 1 },
  51         [ADVICE_NESTED_TAG]                             = { "nestedTag", 1 },
  52         [ADVICE_OBJECT_NAME_WARNING]                    = { "objectNameWarning", 1 },
  53         [ADVICE_PUSH_ALREADY_EXISTS]                    = { "pushAlreadyExists", 1 },
  54         [ADVICE_PUSH_FETCH_FIRST]                       = { "pushFetchFirst", 1 },
  55         [ADVICE_PUSH_NEEDS_FORCE]                       = { "pushNeedsForce", 1 },
  56         [ADVICE_PUSH_REF_NEEDS_UPDATE]                  = { "pushRefNeedsUpdate", 1 },
  57
  58         /* make this an alias for backward compatibility */
  59         [ADVICE_PUSH_UPDATE_REJECTED_ALIAS]             = { "pushNonFastForward", 1 },
  60
  61         [ADVICE_PUSH_NON_FF_CURRENT]                    = { "pushNonFFCurrent", 1 },
  62         [ADVICE_PUSH_NON_FF_MATCHING]                   = { "pushNonFFMatching", 1 },
  63         [ADVICE_PUSH_UNQUALIFIED_REF_NAME]              = { "pushUnqualifiedRefName", 1 },
  64         [ADVICE_PUSH_UPDATE_REJECTED]                   = { "pushUpdateRejected", 1 },
  65         [ADVICE_RESET_NO_REFRESH_WARNING]               = { "resetNoRefresh", 1 },
  66         [ADVICE_RESOLVE_CONFLICT]                       = { "resolveConflict", 1 },
  67         [ADVICE_RM_HINTS]                               = { "rmHints", 1 },
  68         [ADVICE_SEQUENCER_IN_USE]                       = { "sequencerInUse", 1 },
  69         [ADVICE_SET_UPSTREAM_FAILURE]                   = { "setUpstreamFailure", 1 },
  70         [ADVICE_SKIPPED_CHERRY_PICKS]                   = { "skippedCherryPicks", 1 },
  71         [ADVICE_STATUS_AHEAD_BEHIND_WARNING]            = { "statusAheadBehindWarning", 1 },
  72         [ADVICE_STATUS_HINTS]                           = { "statusHints", 1 },
  73         [ADVICE_STATUS_U_OPTION]                        = { "statusUoption", 1 },
  74         [ADVICE_SUBMODULE_ALTERNATE_ERROR_STRATEGY_DIE] = { "submoduleAlternateErrorStrategyDie", 1 },
  75         [ADVICE_SUBMODULES_NOT_UPDATED]                 = { "submodulesNotUpdated", 1 },
  76         [ADVICE_UPDATE_SPARSE_PATH]                     = { "updateSparsePath", 1 },
  77         [ADVICE_WAITING_FOR_EDITOR]                     = { "waitingForEditor", 1 },
  78 };
  79
  80 static const char turn_off_instructions[] =
  81 N_("\n"
  82    "Disable this message with \"git config advice.%s false\"");
  83
  84 static void vadvise(const char *advice, int display_instructions,
  85                     const char *key, va_list params)
  86 {
  87         struct strbuf buf = STRBUF_INIT;
  88         const char *cp, *np;
  89
  90         strbuf_vaddf(&buf, advice, params);
  91
  92         if (display_instructions)
  93                 strbuf_addf(&buf, turn_off_instructions, key);
  94
  95         for (cp = buf.buf; *cp; cp = np) {
  96                 np = strchrnul(cp, '\n');
  97                 fprintf(stderr, _("%shint: %.*s%s\n"),
  98                         advise_get_color(ADVICE_COLOR_HINT),
  99                         (int)(np - cp), cp,
 100                         advise_get_color(ADVICE_COLOR_RESET));
 101                 if (*np)
 102                         np++;
 103         }
 104         strbuf_release(&buf);
 105 }
 106
 107 void advise(const char *advice, ...)
 108 {
 109         va_list params;
 110         va_start(params, advice);
 111         vadvise(advice, 0, "", params);
 112         va_end(params);
 113 }
 114
 115 int advice_enabled(enum advice_type type)
 116 {
 117         switch(type) {
 118         case ADVICE_PUSH_UPDATE_REJECTED:
 119                 return advice_setting[ADVICE_PUSH_UPDATE_REJECTED].enabled &&
 120                        advice_setting[ADVICE_PUSH_UPDATE_REJECTED_ALIAS].enabled;
 121         default:
 122                 return advice_setting[type].enabled;
 123         }
 124 }
 125
 126 void advise_if_enabled(enum advice_type type, const char *advice, ...)
 127 {
 128         va_list params;
 129
 130         if (!advice_enabled(type))
 131                 return;
 132
 133         va_start(params, advice);
 134         vadvise(advice, 1, advice_setting[type].key, params);
 135         va_end(params);
 136 }
 137
 138 int git_default_advice_config(const char *var, const char *value)
 139 {
 140         const char *k, *slot_name;
 141         int i;
 142
 143         if (!strcmp(var, "color.advice")) {
 144                 advice_use_color = git_config_colorbool(var, value);
 145                 return 0;
 146         }
 147
 148         if (skip_prefix(var, "color.advice.", &slot_name)) {
 149                 int slot = parse_advise_color_slot(slot_name);
 150                 if (slot < 0)
 151                         return 0;
 152                 if (!value)
 153                         return config_error_nonbool(var);
 154                 return color_parse(value, advice_colors[slot]);
 155         }
 156
 157         if (!skip_prefix(var, "advice.", &k))
 158                 return 0;
 159
 160         for (i = 0; i < ARRAY_SIZE(advice_setting); i++) {
 161                 if (strcasecmp(k, advice_setting[i].key))
 162                         continue;
 163                 advice_setting[i].enabled = git_config_bool(var, value);
 164                 return 0;
 165         }
 166
 167         return 0;
 168 }
 169
 170 void list_config_advices(struct string_list *list, const char *prefix)
 171 {
 172         int i;
 173
 174         for (i = 0; i < ARRAY_SIZE(advice_setting); i++)
 175                 list_config_item(list, prefix, advice_setting[i].key);
 176 }
 177
 178 int error_resolve_conflict(const char *me)
 179 {
 180         if (!strcmp(me, "cherry-pick"))
 181                 error(_("Cherry-picking is not possible because you have unmerged files."));
 182         else if (!strcmp(me, "commit"))
 183                 error(_("Committing is not possible because you have unmerged files."));
 184         else if (!strcmp(me, "merge"))
 185                 error(_("Merging is not possible because you have unmerged files."));
 186         else if (!strcmp(me, "pull"))
 187                 error(_("Pulling is not possible because you have unmerged files."));
 188         else if (!strcmp(me, "revert"))
 189                 error(_("Reverting is not possible because you have unmerged files."));
 190         else
 191                 error(_("It is not possible to %s because you have unmerged files."),
 192                         me);
 193
 194         if (advice_enabled(ADVICE_RESOLVE_CONFLICT))
 195                 /*
 196                  * Message used both when 'git commit' fails and when
 197                  * other commands doing a merge do.
 198                  */
 199                 advise(_("Fix them up in the work tree, and then use 'git add/rm <file>'\n"
 200                          "as appropriate to mark resolution and make a commit."));
 201         return -1;
 202 }
 203
 204 void NORETURN die_resolve_conflict(const char *me)
 205 {
 206         error_resolve_conflict(me);
 207         die(_("Exiting because of an unresolved conflict."));
 208 }
 209
 210 void NORETURN die_conclude_merge(void)
 211 {
 212         error(_("You have not concluded your merge (MERGE_HEAD exists)."));
 213         if (advice_enabled(ADVICE_RESOLVE_CONFLICT))
 214                 advise(_("Please, commit your changes before merging."));
 215         die(_("Exiting because of unfinished merge."));
 216 }
 217
 218 void NORETURN die_ff_impossible(void)
 219 {
 220         die(_("Not possible to fast-forward, aborting."));
 221 }
 222
 223 void advise_on_updating_sparse_paths(struct string_list *pathspec_list)
 224 {
 225         struct string_list_item *item;
 226
 227         if (!pathspec_list->nr)
 228                 return;
 229
 230         fprintf(stderr, _("The following paths and/or pathspecs matched paths that exist\n"
 231                           "outside of your sparse-checkout definition, so will not be\n"
 232                           "updated in the index:\n"));
 233         for_each_string_list_item(item, pathspec_list)
 234                 fprintf(stderr, "%s\n", item->string);
 235
 236         advise_if_enabled(ADVICE_UPDATE_SPARSE_PATH,
 237                           _("If you intend to update such entries, try one of the following:\n"
 238                             "* Use the --sparse option.\n"
 239                             "* Disable or modify the sparsity rules."));
 240 }
 241
 242 void detach_advice(const char *new_name)
 243 {
 244         const char *fmt =
 245         _("Note: switching to '%s'.\n"
 246         "\n"
 247         "You are in 'detached HEAD' state. You can look around, make experimental\n"
 248         "changes and commit them, and you can discard any commits you make in this\n"
 249         "state without impacting any branches by switching back to a branch.\n"
 250         "\n"
 251         "If you want to create a new branch to retain commits you create, you may\n"
 252         "do so (now or later) by using -c with the switch command. Example:\n"
 253         "\n"
 254         "  git switch -c <new-branch-name>\n"
 255         "\n"
 256         "Or undo this operation with:\n"
 257         "\n"
 258         "  git switch -\n"
 259         "\n"
 260         "Turn off this advice by setting config variable advice.detachedHead to false\n\n");
 261
 262         fprintf(stderr, fmt, new_name);
 263 }