for-each-reflog: fix case for empty log directory
[gitweb.git] / combine-diff.c
index ce063b4ffa48eb1db8849d5aabb6732fc98946b6..a5f2c8dd4a414e513d0421f9a499d06c73ecaf5a 100644 (file)
@@ -31,9 +31,9 @@ static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr,
                        memset(p->parent, 0,
                               sizeof(p->parent[0]) * num_parent);
 
-                       memcpy(p->sha1, q->queue[i]->two->sha1, 20);
+                       hashcpy(p->sha1, q->queue[i]->two->sha1);
                        p->mode = q->queue[i]->two->mode;
-                       memcpy(p->parent[n].sha1, q->queue[i]->one->sha1, 20);
+                       hashcpy(p->parent[n].sha1, q->queue[i]->one->sha1);
                        p->parent[n].mode = q->queue[i]->one->mode;
                        p->parent[n].status = q->queue[i]->status;
                        *tail = p;
@@ -56,8 +56,7 @@ static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr,
                        len = strlen(path);
                        if (len == p->len && !memcmp(path, p->path, len)) {
                                found = 1;
-                               memcpy(p->parent[n].sha1,
-                                      q->queue[i]->one->sha1, 20);
+                               hashcpy(p->parent[n].sha1, q->queue[i]->one->sha1);
                                p->parent[n].mode = q->queue[i]->one->mode;
                                p->parent[n].status = q->queue[i]->status;
                                break;
@@ -483,11 +482,21 @@ static int make_hunks(struct sline *sline, unsigned long cnt,
        return has_interesting;
 }
 
-static void show_parent_lno(struct sline *sline, unsigned long l0, unsigned long l1, int n)
+static void show_parent_lno(struct sline *sline, unsigned long l0, unsigned long l1, int n, unsigned long null_context)
 {
        l0 = sline[l0].p_lno[n];
        l1 = sline[l1].p_lno[n];
-       printf(" -%lu,%lu", l0, l1-l0);
+       printf(" -%lu,%lu", l0, l1-l0-null_context);
+}
+
+static int hunk_comment_line(const char *bol)
+{
+       int ch;
+
+       if (!bol)
+               return 0;
+       ch = *bol & 0xff;
+       return (isalpha(ch) || ch == '_' || ch == '$');
 }
 
 static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
@@ -509,8 +518,14 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
                struct sline *sl = &sline[lno];
                unsigned long hunk_end;
                unsigned long rlines;
-               while (lno <= cnt && !(sline[lno].flag & mark))
+               const char *hunk_comment = NULL;
+               unsigned long null_context = 0;
+
+               while (lno <= cnt && !(sline[lno].flag & mark)) {
+                       if (hunk_comment_line(sline[lno].bol))
+                               hunk_comment = sline[lno].bol;
                        lno++;
+               }
                if (cnt < lno)
                        break;
                else {
@@ -521,12 +536,46 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
                rlines = hunk_end - lno;
                if (cnt < hunk_end)
                        rlines--; /* pointing at the last delete hunk */
+
+               if (!context) {
+                       /*
+                        * Even when running with --unified=0, all
+                        * lines in the hunk needs to be processed in
+                        * the loop below in order to show the
+                        * deletion recorded in lost_head.  However,
+                        * we do not want to show the resulting line
+                        * with all blank context markers in such a
+                        * case.  Compensate.
+                        */
+                       unsigned long j;
+                       for (j = lno; j < hunk_end; j++)
+                               if (!(sline[j].flag & (mark-1)))
+                                       null_context++;
+                       rlines -= null_context;
+               }
+
                fputs(c_frag, stdout);
                for (i = 0; i <= num_parent; i++) putchar(combine_marker);
                for (i = 0; i < num_parent; i++)
-                       show_parent_lno(sline, lno, hunk_end, i);
+                       show_parent_lno(sline, lno, hunk_end, i, null_context);
                printf(" +%lu,%lu ", lno+1, rlines);
                for (i = 0; i <= num_parent; i++) putchar(combine_marker);
+
+               if (hunk_comment) {
+                       int comment_end = 0;
+                       for (i = 0; i < 40; i++) {
+                               int ch = hunk_comment[i] & 0xff;
+                               if (!ch || ch == '\n')
+                                       break;
+                               if (!isspace(ch))
+                                   comment_end = i;
+                       }
+                       if (comment_end)
+                               putchar(' ');
+                       for (i = 0; i < comment_end; i++)
+                               putchar(hunk_comment[i]);
+               }
+
                printf("%s\n", c_reset);
                while (lno < hunk_end) {
                        struct lline *ll;
@@ -548,8 +597,15 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
                        if (cnt < lno)
                                break;
                        p_mask = 1;
-                       if (!(sl->flag & (mark-1)))
+                       if (!(sl->flag & (mark-1))) {
+                               /*
+                                * This sline was here to hang the
+                                * lost lines in front of it.
+                                */
+                               if (!context)
+                                       continue;
                                fputs(c_plain, stdout);
+                       }
                        else
                                fputs(c_new, stdout);
                        for (j = 0; j < num_parent; j++) {
@@ -688,8 +744,8 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
        for (i = 0; i < num_parent; i++) {
                int j;
                for (j = 0; j < i; j++) {
-                       if (!memcmp(elem->parent[i].sha1,
-                                   elem->parent[j].sha1, 20)) {
+                       if (!hashcmp(elem->parent[i].sha1,
+                                    elem->parent[j].sha1)) {
                                reuse_combine_diff(sline, cnt, i, j);
                                break;
                        }
@@ -708,8 +764,10 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
                int use_color = opt->color_diff;
                const char *c_meta = diff_get_color(use_color, DIFF_METAINFO);
                const char *c_reset = diff_get_color(use_color, DIFF_RESET);
+               int added = 0;
+               int deleted = 0;
 
-               if (rev->loginfo)
+               if (rev->loginfo && !rev->no_commit_id)
                        show_log(rev, opt->msg_sep);
                dump_quoted_path(dense ? "diff --cc " : "diff --combined ",
                                 elem->path, c_meta, c_reset);
@@ -723,7 +781,10 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
                printf("..%s%s\n", abb, c_reset);
 
                if (mode_differs) {
-                       int added = !!elem->mode;
+                       deleted = !elem->mode;
+
+                       /* We say it was added if nobody had it */
+                       added = !deleted;
                        for (i = 0; added && i < num_parent; i++)
                                if (elem->parent[i].status !=
                                    DIFF_STATUS_ADDED)
@@ -732,7 +793,7 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
                                printf("%snew file mode %06o",
                                       c_meta, elem->mode);
                        else {
-                               if (!elem->mode)
+                               if (deleted)
                                        printf("%sdeleted file ", c_meta);
                                printf("mode ");
                                for (i = 0; i < num_parent; i++) {
@@ -744,8 +805,14 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
                        }
                        printf("%s\n", c_reset);
                }
-               dump_quoted_path("--- a/", elem->path, c_meta, c_reset);
-               dump_quoted_path("+++ b/", elem->path, c_meta, c_reset);
+               if (added)
+                       dump_quoted_path("--- /dev/", "null", c_meta, c_reset);
+               else
+                       dump_quoted_path("--- a/", elem->path, c_meta, c_reset);
+               if (deleted)
+                       dump_quoted_path("+++ /dev/", "null", c_meta, c_reset);
+               else
+                       dump_quoted_path("+++ b/", elem->path, c_meta, c_reset);
                dump_sline(sline, cnt, num_parent, opt->color_diff);
        }
        free(result);
@@ -778,7 +845,7 @@ static void show_raw_diff(struct combine_diff_path *p, int num_parent, struct re
        if (!line_termination)
                inter_name_termination = 0;
 
-       if (rev->loginfo)
+       if (rev->loginfo && !rev->no_commit_id)
                show_log(rev, opt->msg_sep);
 
        if (opt->output_format & DIFF_FORMAT_RAW) {
@@ -850,15 +917,17 @@ void diff_tree_combined(const unsigned char *sha1,
        diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
        diffopts.recursive = 1;
 
-       show_log_first = !!rev->loginfo;
+       show_log_first = !!rev->loginfo && !rev->no_commit_id;
        needsep = 0;
        /* find set of paths that everybody touches */
        for (i = 0; i < num_parent; i++) {
                /* show stat against the first parent even
                 * when doing combined diff.
                 */
-               if (i == 0 && opt->output_format & DIFF_FORMAT_DIFFSTAT)
-                       diffopts.output_format = DIFF_FORMAT_DIFFSTAT;
+               int stat_opt = (opt->output_format &
+                               (DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT));
+               if (i == 0 && stat_opt)
+                       diffopts.output_format = stat_opt;
                else
                        diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
                diff_tree_sha1(parent[i], sha1, "", &diffopts);
@@ -888,7 +957,8 @@ void diff_tree_combined(const unsigned char *sha1,
                        }
                        needsep = 1;
                }
-               else if (opt->output_format & DIFF_FORMAT_DIFFSTAT)
+               else if (opt->output_format &
+                        (DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT))
                        needsep = 1;
                if (opt->output_format & DIFF_FORMAT_PATCH) {
                        if (needsep)
@@ -927,6 +997,7 @@ void diff_tree_combined_merge(const unsigned char *sha1,
        for (parents = commit->parents, num_parent = 0;
             parents;
             parents = parents->next, num_parent++)
-               memcpy(parent + num_parent, parents->item->object.sha1, 20);
+               hashcpy((unsigned char*)(parent + num_parent),
+                       parents->item->object.sha1);
        diff_tree_combined(sha1, parent, num_parent, dense, rev);
 }