Add support for showing boundary commits in the main view

The boundary commits are marked using a "^" character, which hopefully
is somewhat intuitive and familiar since git revision specification uses
it as its cut-off prefix.

diff --git a/tig.c b/tig.c
index 446453d..14f73e6 100644 (file)
--- a/tig.c
+++ b/tig.c
@@ -72,6 +72,7 @@ static size_t utf8_length(const char *string, size_t max_width, int *coloffset,
 #define REVGRAPH_MERGE 'M'
 #define REVGRAPH_BRANCH        '+'
 #define REVGRAPH_COMMIT        '*'
+#define REVGRAPH_BOUND '^'
 #define REVGRAPH_LINE  '|'
 
 #define SIZEOF_REVGRAPH        19      /* Size of revision ancestry graphics. */
@@ -111,7 +112,7 @@ static size_t utf8_length(const char *string, size_t max_width, int *coloffset,
        "git log --no-color --cc --stat -n100 %s 2>/dev/null"
 
 #define TIG_MAIN_CMD \
-       "git log --no-color --topo-order --pretty=raw %s 2>/dev/null"
+       "git log --no-color --topo-order --boundary --pretty=raw %s 2>/dev/null"
 
 #define TIG_TREE_CMD   \
        "git ls-tree %s %s"
@@ -559,7 +560,7 @@ parse_options(int argc, char *argv[])
                if (opt_request == REQ_VIEW_MAIN)
                        /* XXX: This is vulnerable to the user overriding
                         * options required for the main view parser. */
-                       string_copy(opt_cmd, "git log --no-color --pretty=raw");
+                       string_copy(opt_cmd, "git log --no-color --pretty=raw --boundary");
                else
                        string_copy(opt_cmd, "git");
                buf_size = strlen(opt_cmd);
@@ -3860,6 +3861,7 @@ struct rev_graph {
        size_t size;
        struct commit *commit;
        size_t pos;
+       unsigned int boundary:1;
 };
 
 /* Parents of the commit being visualized. */
@@ -3932,7 +3934,9 @@ get_rev_graph_symbol(struct rev_graph *graph)
 {
        chtype symbol;
 
-       if (graph->parents->size == 0)
+       if (graph->boundary)
+               symbol = REVGRAPH_BOUND;
+       else if (graph->parents->size == 0)
                symbol = REVGRAPH_INIT;
        else if (graph_parent_is_merge(graph))
                symbol = REVGRAPH_MERGE;
@@ -4014,7 +4018,7 @@ prepare_rev_graph(struct rev_graph *graph)
        }
 
        /* Interleave the new revision parent(s). */
-       for (i = 0; i < graph->parents->size; i++)
+       for (i = 0; !graph->boundary && i < graph->parents->size; i++)
                push_rev_graph(graph->next, graph->parents->rev[i]);
 
        /* Lastly, put any remaining revisions. */
@@ -4174,7 +4178,13 @@ main_read(struct view *view, char *line)
                if (!commit)
                        return FALSE;
 
-               string_copy_rev(commit->id, line + STRING_SIZE("commit "));
+               line += STRING_SIZE("commit ");
+               if (*line == '-') {
+                       graph->boundary = 1;
+                       line++;
+               }
+
+               string_copy_rev(commit->id, line);
                commit->refs = get_refs(commit->id);
                graph->commit = commit;
                add_line_data(view, commit, LINE_MAIN_COMMIT);