commit: suggest --amend --reset-author to fix commiter identity

[git.git] / diff.c

diff --git a/diff.c b/diff.c
index 144f2aaba85682ef44d307d2b015fd918336879b..fa3b29d92e39cd35b30c1572acd06e2ba2708edd 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -919,7 +919,10 @@ static void free_diff_words_data(struct emit_callback *ecbdata)
                free (ecbdata->diff_words->minus.orig);
                free (ecbdata->diff_words->plus.text.ptr);
                free (ecbdata->diff_words->plus.orig);
-               free(ecbdata->diff_words->word_regex);
+               if (ecbdata->diff_words->word_regex) {
+                       regfree(ecbdata->diff_words->word_regex);
+                       free(ecbdata->diff_words->word_regex);
+               }
                free(ecbdata->diff_words);
                ecbdata->diff_words = NULL;
        }
@@ -1768,8 +1771,14 @@ static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two, char *pre
 
 static void diff_filespec_load_driver(struct diff_filespec *one)
 {
-       if (!one->driver)
+       /* Use already-loaded driver */
+       if (one->driver)
+               return;
+
+       if (S_ISREG(one->mode))
                one->driver = userdiff_find_by_path(one->path);
+
+       /* Fallback to default settings */
        if (!one->driver)
                one->driver = userdiff_find_by_name("default");
 }
@@ -1817,8 +1826,7 @@ struct userdiff_driver *get_textconv(struct diff_filespec *one)
 {
        if (!DIFF_FILE_VALID(one))
                return NULL;
-       if (!S_ISREG(one->mode))
-               return NULL;
+
        diff_filespec_load_driver(one);
        if (!one->driver->textconv)
                return NULL;
@@ -2150,7 +2158,7 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
 
                        ecbdata.ws_rule = data.ws_rule;
                        check_blank_at_eof(&mf1, &mf2, &ecbdata);
-                       blank_at_eof = ecbdata.blank_at_eof_in_preimage;
+                       blank_at_eof = ecbdata.blank_at_eof_in_postimage;
 
                        if (blank_at_eof) {
                                static char *err;
@@ -2383,10 +2391,14 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only)
        }
        else {
                enum object_type type;
-               if (size_only)
+               if (size_only) {
                        type = sha1_object_info(s->sha1, &s->size);
-               else {
+                       if (type < 0)
+                               die("unable to read %s", sha1_to_hex(s->sha1));
+               } else {
                        s->data = read_sha1_file(s->sha1, &type, &s->size);
+                       if (!s->data)
+                               die("unable to read %s", sha1_to_hex(s->sha1));
                        s->should_free = 1;
                }
        }
@@ -3307,7 +3319,7 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
        else if ((argcount = parse_long_opt("output", av, &optarg))) {
                options->file = fopen(optarg, "w");
                if (!options->file)
-                       die_errno("Could not open '%s'", arg + strlen("--output="));
+                       die_errno("Could not open '%s'", optarg);
                options->close_file = 1;
                return argcount;
        } else
@@ -3524,7 +3536,7 @@ static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o,
 
        if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
            (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
-               return; /* no tree diffs in patch format */
+               return; /* no useful stat for tree diffs */
 
        run_diffstat(p, o, diffstat);
 }
@@ -3537,7 +3549,7 @@ static void diff_flush_checkdiff(struct diff_filepair *p,
 
        if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
            (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
-               return; /* no tree diffs in patch format */
+               return; /* nothing to check in tree diffs */
 
        run_checkdiff(p, o);
 }
@@ -3862,7 +3874,7 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1)
 
                xpp.flags = 0;
                xecfg.ctxlen = 3;
-               xecfg.flags = XDL_EMIT_FUNCNAMES;
+               xecfg.flags = 0;
                xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data,
                              &xpp, &xecfg);
        }
@@ -4376,7 +4388,7 @@ size_t fill_textconv(struct userdiff_driver *driver,
                return df->size;
        }
 
-       if (driver->textconv_cache) {
+       if (driver->textconv_cache && df->sha1_valid) {
                *outbuf = notes_cache_get(driver->textconv_cache, df->sha1,
                                          &size);
                if (*outbuf)
@@ -4387,7 +4399,7 @@ size_t fill_textconv(struct userdiff_driver *driver,
        if (!*outbuf)
                die("unable to read files to diff");
 
-       if (driver->textconv_cache) {
+       if (driver->textconv_cache && df->sha1_valid) {
                /* ignore errors, as we might be in a readonly repository */
                notes_cache_put(driver->textconv_cache, df->sha1, *outbuf,
                                size);