combine-diff: move formatting logic to show_combined_diff()

This way, diff-files can make use of it.  Also implement the
full suite of what diff_flush_raw() supports just for
consistency.  With this, 'diff-tree -c -r --name-status' would
show what is expected.

There is no way to get the historical output (useful for
debugging and low-level Plumbing work) anymore, so tentatively
it makes '-m' to mean "do not combine and show individual diffs
with parents".

diff-files matches diff-tree to produce raw output for -c.  For
textual combined diff, use -p -c.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/combine-diff.c b/combine-diff.c
index 6d78305..9aa099b 100644 (file)
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -618,8 +618,8 @@ static void reuse_combine_diff(struct sline *sline, unsigned long cnt,
        sline->p_lno[i] = sline->p_lno[j];
 }
 
-int show_combined_diff(struct combine_diff_path *elem, int num_parent,
-                      int dense, const char *header)
+static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
+                          int dense, const char *header)
 {
        unsigned long size, cnt, lno;
        char *result, *cp, *ep;
@@ -791,32 +791,69 @@ static void show_raw_diff(struct combine_diff_path *p, int num_parent, const cha
 
        if (header)
                puts(header);
-       offset = strlen(COLONS) - num_parent;
-       if (offset < 0)
-               offset = 0;
-       prefix = COLONS + offset;
 
-       /* Show the modes */
        for (i = 0; i < num_parent; i++) {
-               int mode = p->parent[i].mode;
-               if (mode)
+               if (p->parent[i].mode)
                        mod_type = 'M';
-               printf("%s%06o", prefix, mode);
-               prefix = " ";
        }
-       printf("%s%06o", prefix, p->mode);
        if (!p->mode)
                mod_type = 'D';
 
-       /* Show sha1's */
-       for (i = 0; i < num_parent; i++) {
-               printf("%s%s", prefix, diff_unique_abbrev(p->parent[i].sha1, opt->abbrev));
-               prefix = " ";
+       if (opt->output_format == DIFF_FORMAT_RAW) {
+               offset = strlen(COLONS) - num_parent;
+               if (offset < 0)
+                       offset = 0;
+               prefix = COLONS + offset;
+
+               /* Show the modes */
+               for (i = 0; i < num_parent; i++) {
+                       printf("%s%06o", prefix, p->parent[i].mode);
+                       prefix = " ";
+               }
+               printf("%s%06o", prefix, p->mode);
+
+               /* Show sha1's */
+               for (i = 0; i < num_parent; i++)
+                       printf(" %s", diff_unique_abbrev(p->parent[i].sha1,
+                                                        opt->abbrev));
+               printf(" %s ", diff_unique_abbrev(p->sha1, opt->abbrev));
+       }
+
+       if (opt->output_format == DIFF_FORMAT_RAW ||
+           opt->output_format == DIFF_FORMAT_NAME_STATUS)
+               printf("%c%c", mod_type, inter_name_termination);
+
+       if (line_termination) {
+               if (quote_c_style(p->path, NULL, NULL, 0))
+                       quote_c_style(p->path, NULL, stdout, 0);
+               else
+                       printf("%s", p->path);
+               putchar(line_termination);
+       }
+       else {
+               printf("%s%c", p->path, line_termination);
        }
-       printf("%s%s", prefix, diff_unique_abbrev(p->sha1, opt->abbrev));
+}
+
+int show_combined_diff(struct combine_diff_path *p,
+                      int num_parent,
+                      int dense,
+                      const char *header,
+                      struct diff_options *opt)
+{
+       if (!p->len)
+               return 0;
+       switch (opt->output_format) {
+       case DIFF_FORMAT_RAW:
+       case DIFF_FORMAT_NAME_STATUS:
+       case DIFF_FORMAT_NAME:
+               show_raw_diff(p, num_parent, header, opt);
+               return 1;
 
-       /* Modification type, terminations, filename */
-       printf(" %c%c%s%c", mod_type, inter_name_termination, p->path, line_termination);
+       default:
+       case DIFF_FORMAT_PATCH:
+               return show_patch_diff(p, num_parent, dense, header);
+       }
 }
 
 const char *diff_tree_combined_merge(const unsigned char *sha1,
@@ -858,14 +895,8 @@ const char *diff_tree_combined_merge(const unsigned char *sha1,
        }
        if (num_paths) {
                for (p = paths; p; p = p->next) {
-                       if (!p->len)
-                               continue;
-                       if (opt->output_format == DIFF_FORMAT_RAW) {
-                               show_raw_diff(p, num_parent, header, opt);
-                               header = NULL;
-                               continue;
-                       }
-                       if (show_combined_diff(p, num_parent, dense, header))
+                       if (show_combined_diff(p, num_parent, dense,
+                                              header, opt))
                                header = NULL;
                }
        }

diff --git a/diff-files.c b/diff-files.c
index d24d11c..7db5ce6 100644 (file)
--- a/diff-files.c
+++ b/diff-files.c
@@ -88,9 +88,8 @@ int main(int argc, const char **argv)
                }
                argv++; argc--;
        }
-       if (combine_merges) {
+       if (dense_combined_merges)
                diff_options.output_format = DIFF_FORMAT_PATCH;
-       }
 
        /* Find the directory, and set up the pathspec */
        pathspec = get_pathspec(prefix, argv + 1);
@@ -166,7 +165,8 @@ int main(int argc, const char **argv)
                        if (combine_merges && num_compare_stages == 2) {
                                show_combined_diff(&combine.p, 2,
                                                   dense_combined_merges,
-                                                  NULL);
+                                                  NULL,
+                                                  &diff_options);
                                free(combine.p.path);
                                continue;
                        }

diff --git a/diff-tree.c b/diff-tree.c
index df6fd97..b170b03 100644 (file)
--- a/diff-tree.c
+++ b/diff-tree.c
@@ -248,7 +248,7 @@ int main(int argc, const char **argv)
                        continue;
                }
                if (!strcmp(arg, "-m")) {
-                       ignore_merges = 0;
+                       combine_merges = ignore_merges = 0;
                        continue;
                }
                if (!strcmp(arg, "-c")) {

diff --git a/diff.h b/diff.h
index 9088519..946a406 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -75,7 +75,8 @@ struct combine_diff_path {
         sizeof(struct combine_diff_parent) * (n) + (l) + 1)
 
 extern int show_combined_diff(struct combine_diff_path *elem, int num_parent,
-                             int dense, const char *header);
+                             int dense, const char *header,
+                             struct diff_options *);
 
 extern const char *diff_tree_combined_merge(const unsigned char *sha1, const char *, int, struct diff_options *opt);