t7006 (pager): introduce helper for parameterized tests

diff --git a/log-tree.c b/log-tree.c
index 27afcf697238a48c01dd49996f5263cd72a52eac..2e2be7c40f996949a69f597168b620976cf55b2f 100644 (file)
--- a/log-tree.c
+++ b/log-tree.c
@@ -469,6 +469,12 @@ int log_tree_diff_flush(struct rev_info *opt)
                        int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
                        if ((pch & opt->diffopt.output_format) == pch)
                                printf("---");
+                       if (opt->diffopt.output_prefix) {
+                               struct strbuf *msg = NULL;
+                               msg = opt->diffopt.output_prefix(&opt->diffopt,
+                                       opt->diffopt.output_prefix_data);
+                               fwrite(msg->buf, msg->len, 1, stdout);
+                       }
                        putchar('\n');
                }
        }
@@ -514,6 +520,16 @@ static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log
                        return 0;
                else if (opt->combine_merges)
                        return do_diff_combined(opt, commit);
+               else if (opt->first_parent_only) {
+                       /*
+                        * Generate merge log entry only for the first
+                        * parent, showing summary diff of the others
+                        * we merged _in_.
+                        */
+                       diff_tree_sha1(parents->item->object.sha1, sha1, "", &opt->diffopt);
+                       log_tree_diff_flush(opt);
+                       return !opt->loginfo;
+               }
 
                /* If we show individual diffs, show the parent info */
                log->parent = parents->item;