strbuf: add strbuf_tolower function
[gitweb.git] / diff.c
diff --git a/diff.c b/diff.c
index 015895bba6165a207b167e843b865777a86088bd..f72769a1c492dfcac501032c54c3fb2ac0a4343e 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -16,6 +16,7 @@
 #include "submodule.h"
 #include "ll-merge.h"
 #include "string-list.h"
+#include "argv-array.h"
 
 #ifdef NO_FAST_WORKING_DIRECTORY
 #define FAST_WORKING_DIRECTORY 0
@@ -1361,11 +1362,7 @@ static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat,
 {
        struct diffstat_file *x;
        x = xcalloc(sizeof (*x), 1);
-       if (diffstat->nr == diffstat->alloc) {
-               diffstat->alloc = alloc_nr(diffstat->alloc);
-               diffstat->files = xrealloc(diffstat->files,
-                               diffstat->alloc * sizeof(x));
-       }
+       ALLOC_GROW(diffstat->files, diffstat->nr + 1, diffstat->alloc);
        diffstat->files[diffstat->nr++] = x;
        if (name_b) {
                x->from_name = xstrdup(name_a);
@@ -1465,20 +1462,12 @@ int print_stat_summary(FILE *fp, int files, int insertions, int deletions)
         * but nothing about added/removed lines? Is this a bug in Git?").
         */
        if (insertions || deletions == 0) {
-               /*
-                * TRANSLATORS: "+" in (+) is a line addition marker;
-                * do not translate it.
-                */
                strbuf_addf(&sb,
                            (insertions == 1) ? ", %d insertion(+)" : ", %d insertions(+)",
                            insertions);
        }
 
        if (deletions || insertions == 0) {
-               /*
-                * TRANSLATORS: "-" in (-) is a line removal marker;
-                * do not translate it.
-                */
                strbuf_addf(&sb,
                            (deletions == 1) ? ", %d deletion(-)" : ", %d deletions(-)",
                            deletions);
@@ -2845,8 +2834,9 @@ static struct diff_tempfile *prepare_temp_file(const char *name,
                remove_tempfile_installed = 1;
        }
 
-       if (!one->sha1_valid ||
-           reuse_worktree_file(name, one->sha1, 1)) {
+       if (!S_ISGITLINK(one->mode) &&
+           (!one->sha1_valid ||
+            reuse_worktree_file(name, one->sha1, 1))) {
                struct stat st;
                if (lstat(name, &st) < 0) {
                        if (errno == ENOENT)
@@ -2905,9 +2895,8 @@ static void run_external_diff(const char *pgm,
                              int complete_rewrite,
                              struct diff_options *o)
 {
-       const char *spawn_arg[10];
+       struct argv_array argv = ARGV_ARRAY_INIT;
        int retval;
-       const char **arg = &spawn_arg[0];
        struct diff_queue_struct *q = &diff_queued_diff;
        const char *env[3] = { NULL };
        char env_counter[50];
@@ -2918,23 +2907,22 @@ static void run_external_diff(const char *pgm,
                const char *othername = (other ? other : name);
                temp_one = prepare_temp_file(name, one);
                temp_two = prepare_temp_file(othername, two);
-               *arg++ = pgm;
-               *arg++ = name;
-               *arg++ = temp_one->name;
-               *arg++ = temp_one->hex;
-               *arg++ = temp_one->mode;
-               *arg++ = temp_two->name;
-               *arg++ = temp_two->hex;
-               *arg++ = temp_two->mode;
+               argv_array_push(&argv, pgm);
+               argv_array_push(&argv, name);
+               argv_array_push(&argv, temp_one->name);
+               argv_array_push(&argv, temp_one->hex);
+               argv_array_push(&argv, temp_one->mode);
+               argv_array_push(&argv, temp_two->name);
+               argv_array_push(&argv, temp_two->hex);
+               argv_array_push(&argv, temp_two->mode);
                if (other) {
-                       *arg++ = other;
-                       *arg++ = xfrm_msg;
+                       argv_array_push(&argv, other);
+                       argv_array_push(&argv, xfrm_msg);
                }
        } else {
-               *arg++ = pgm;
-               *arg++ = name;
+               argv_array_push(&argv, pgm);
+               argv_array_push(&argv, name);
        }
-       *arg = NULL;
        fflush(NULL);
 
        env[0] = env_counter;
@@ -2943,8 +2931,9 @@ static void run_external_diff(const char *pgm,
        env[1] = env_total;
        snprintf(env_total, sizeof(env_total), "GIT_DIFF_PATH_TOTAL=%d", q->nr);
 
-       retval = run_command_v_opt_cd_env(spawn_arg, RUN_USING_SHELL, NULL, env);
+       retval = run_command_v_opt_cd_env(argv.argv, RUN_USING_SHELL, NULL, env);
        remove_tempfile();
+       argv_array_clear(&argv);
        if (retval) {
                fprintf(stderr, "external diff died, stopping at %s.\n", name);
                exit(1);
@@ -3596,14 +3585,6 @@ static int parse_diff_filter_opt(const char *optarg, struct diff_options *opt)
        return 0;
 }
 
-/* Used only by "diff-files" and "diff --no-index" */
-void handle_deprecated_show_diff_q(struct diff_options *opt)
-{
-       warning("'diff -q' and 'diff-files -q' are deprecated.");
-       warning("Use 'diff --diff-filter=d' instead to ignore deleted filepairs.");
-       parse_diff_filter_opt("d", opt);
-}
-
 static void enable_patch_output(int *fmt) {
        *fmt &= ~DIFF_FORMAT_NO_OUTPUT;
        *fmt |= DIFF_FORMAT_PATCH;
@@ -3938,7 +3919,7 @@ static int diff_scoreopt_parse(const char *opt)
                }
        }
        if (cmd != 'M' && cmd != 'C' && cmd != 'B')
-               return -1; /* that is not a -M, -C nor -B option */
+               return -1; /* that is not a -M, -Cor -B option */
 
        opt1 = parse_rename_score(&opt);
        if (cmd != 'B')
@@ -3962,11 +3943,7 @@ struct diff_queue_struct diff_queued_diff;
 
 void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp)
 {
-       if (queue->alloc <= queue->nr) {
-               queue->alloc = alloc_nr(queue->alloc);
-               queue->queue = xrealloc(queue->queue,
-                                       sizeof(dp) * queue->alloc);
-       }
+       ALLOC_GROW(queue->queue, queue->nr + 1, queue->alloc);
        queue->queue[queue->nr++] = dp;
 }
 
@@ -4694,6 +4671,38 @@ static int diff_filespec_is_identical(struct diff_filespec *one,
        return !memcmp(one->data, two->data, one->size);
 }
 
+static int diff_filespec_check_stat_unmatch(struct diff_filepair *p)
+{
+       if (p->done_skip_stat_unmatch)
+               return p->skip_stat_unmatch_result;
+
+       p->done_skip_stat_unmatch = 1;
+       p->skip_stat_unmatch_result = 0;
+       /*
+        * 1. Entries that come from stat info dirtiness
+        *    always have both sides (iow, not create/delete),
+        *    one side of the object name is unknown, with
+        *    the same mode and size.  Keep the ones that
+        *    do not match these criteria.  They have real
+        *    differences.
+        *
+        * 2. At this point, the file is known to be modified,
+        *    with the same mode and size, and the object
+        *    name of one side is unknown.  Need to inspect
+        *    the identical contents.
+        */
+       if (!DIFF_FILE_VALID(p->one) || /* (1) */
+           !DIFF_FILE_VALID(p->two) ||
+           (p->one->sha1_valid && p->two->sha1_valid) ||
+           (p->one->mode != p->two->mode) ||
+           diff_populate_filespec(p->one, 1) ||
+           diff_populate_filespec(p->two, 1) ||
+           (p->one->size != p->two->size) ||
+           !diff_filespec_is_identical(p->one, p->two)) /* (2) */
+               p->skip_stat_unmatch_result = 1;
+       return p->skip_stat_unmatch_result;
+}
+
 static void diffcore_skip_stat_unmatch(struct diff_options *diffopt)
 {
        int i;
@@ -4704,27 +4713,7 @@ static void diffcore_skip_stat_unmatch(struct diff_options *diffopt)
        for (i = 0; i < q->nr; i++) {
                struct diff_filepair *p = q->queue[i];
 
-               /*
-                * 1. Entries that come from stat info dirtiness
-                *    always have both sides (iow, not create/delete),
-                *    one side of the object name is unknown, with
-                *    the same mode and size.  Keep the ones that
-                *    do not match these criteria.  They have real
-                *    differences.
-                *
-                * 2. At this point, the file is known to be modified,
-                *    with the same mode and size, and the object
-                *    name of one side is unknown.  Need to inspect
-                *    the identical contents.
-                */
-               if (!DIFF_FILE_VALID(p->one) || /* (1) */
-                   !DIFF_FILE_VALID(p->two) ||
-                   (p->one->sha1_valid && p->two->sha1_valid) ||
-                   (p->one->mode != p->two->mode) ||
-                   diff_populate_filespec(p->one, 1) ||
-                   diff_populate_filespec(p->two, 1) ||
-                   (p->one->size != p->two->size) ||
-                   !diff_filespec_is_identical(p->one, p->two)) /* (2) */
+               if (diff_filespec_check_stat_unmatch(p))
                        diff_q(&outq, p);
                else {
                        /*
@@ -4887,6 +4876,7 @@ void diff_change(struct diff_options *options,
                 unsigned old_dirty_submodule, unsigned new_dirty_submodule)
 {
        struct diff_filespec *one, *two;
+       struct diff_filepair *p;
 
        if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) &&
            is_submodule_ignored(concatpath, options))
@@ -4913,10 +4903,16 @@ void diff_change(struct diff_options *options,
        fill_filespec(two, new_sha1, new_sha1_valid, new_mode);
        one->dirty_submodule = old_dirty_submodule;
        two->dirty_submodule = new_dirty_submodule;
+       p = diff_queue(&diff_queued_diff, one, two);
 
-       diff_queue(&diff_queued_diff, one, two);
-       if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS))
-               DIFF_OPT_SET(options, HAS_CHANGES);
+       if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS))
+               return;
+
+       if (DIFF_OPT_TST(options, QUICK) && options->skip_stat_unmatch &&
+           !diff_filespec_check_stat_unmatch(p))
+               return;
+
+       DIFF_OPT_SET(options, HAS_CHANGES);
 }
 
 struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path)