tag: factor out get_tagged_oid()

diff --git a/range-diff.c b/range-diff.c
index 784fac301bb6cc432d7e7fb69de066125c6aa594..ba1e9a4265a6cb3e6ae77b2f32f9fd64bee04cc6 100644 (file)
--- a/range-diff.c
+++ b/range-diff.c
@@ -10,6 +10,7 @@
 #include "commit.h"
 #include "pretty.h"
 #include "userdiff.h"
+#include "apply.h"
 
 struct patch_util {
        /* For the search for an exact match */
@@ -45,7 +46,7 @@ static int read_patches(const char *range, struct string_list *list)
        struct strbuf buf = STRBUF_INIT, contents = STRBUF_INIT;
        struct patch_util *util = NULL;
        int in_header = 1;
-       char *line;
+       char *line, *current_filename = NULL;
        int offset, len;
        size_t size;
 
@@ -101,16 +102,47 @@ static int read_patches(const char *range, struct string_list *list)
                }
 
                if (starts_with(line, "diff --git")) {
+                       struct patch patch = { 0 };
+                       struct strbuf root = STRBUF_INIT;
+                       int linenr = 0;
+
                        in_header = 0;
                        strbuf_addch(&buf, '\n');
                        if (!util->diff_offset)
                                util->diff_offset = buf.len;
-                       strbuf_addch(&buf, ' ');
-                       strbuf_addstr(&buf, line);
+                       line[len - 1] = '\n';
+                       len = parse_git_diff_header(&root, &linenr, 1, line,
+                                                   len, size, &patch);
+                       if (len < 0)
+                               die(_("could not parse git header '%.*s'"), (int)len, line);
+                       strbuf_addstr(&buf, " ## ");
+                       if (patch.is_new > 0)
+                               strbuf_addf(&buf, "%s (new)", patch.new_name);
+                       else if (patch.is_delete > 0)
+                               strbuf_addf(&buf, "%s (deleted)", patch.old_name);
+                       else if (patch.is_rename)
+                               strbuf_addf(&buf, "%s => %s", patch.old_name, patch.new_name);
+                       else
+                               strbuf_addstr(&buf, patch.new_name);
+
+                       free(current_filename);
+                       if (patch.is_delete > 0)
+                               current_filename = xstrdup(patch.old_name);
+                       else
+                               current_filename = xstrdup(patch.new_name);
+
+                       if (patch.new_mode && patch.old_mode &&
+                           patch.old_mode != patch.new_mode)
+                               strbuf_addf(&buf, " (mode change %06o => %06o)",
+                                           patch.old_mode, patch.new_mode);
+
+                       strbuf_addstr(&buf, " ##");
                } else if (in_header) {
                        if (starts_with(line, "Author: ")) {
+                               strbuf_addstr(&buf, " ## Metadata ##\n");
                                strbuf_addstr(&buf, line);
                                strbuf_addstr(&buf, "\n\n");
+                               strbuf_addstr(&buf, " ## Commit message ##\n");
                        } else if (starts_with(line, "    ")) {
                                p = line + len - 2;
                                while (isspace(*p) && p >= line)
@@ -119,19 +151,20 @@ static int read_patches(const char *range, struct string_list *list)
                                strbuf_addch(&buf, '\n');
                        }
                        continue;
-               } else if (starts_with(line, "@@ "))
+               } else if (skip_prefix(line, "@@ ", &p)) {
+                       p = strstr(p, "@@");
                        strbuf_addstr(&buf, "@@");
-               else if (!line[0] || starts_with(line, "index "))
+                       if (current_filename && p[2])
+                               strbuf_addf(&buf, " %s:", current_filename);
+                       if (p)
+                               strbuf_addstr(&buf, p + 2);
+               } else if (!line[0])
                        /*
                         * A completely blank (not ' \n', which is context)
                         * line is not valid in a diff.  We skip it
                         * silently, because this neatly handles the blank
                         * separator line between commits in git-log
                         * output.
-                        *
-                        * We also want to ignore the diff's `index` lines
-                        * because they contain exact blob hashes in which
-                        * we are not interested.
                         */
                        continue;
                else if (line[0] == '>') {
@@ -156,6 +189,7 @@ static int read_patches(const char *range, struct string_list *list)
        if (util)
                string_list_append(list, buf.buf)->util = util;
        strbuf_release(&buf);
+       free(current_filename);
 
        if (finish_command(&cp))
                return -1;
@@ -370,8 +404,9 @@ static void output_pair_header(struct diff_options *diffopt,
        fwrite(buf->buf, buf->len, 1, diffopt->file);
 }
 
-static struct userdiff_driver no_func_name = {
-       .funcname = { "$^", 0 }
+static struct userdiff_driver section_headers = {
+       .funcname = { "^ ## (.*) ##$\n"
+                     "^.?@@ (.*)$", REG_EXTENDED }
 };
 
 static struct diff_filespec *get_filespec(const char *name, const char *p)
@@ -383,7 +418,7 @@ static struct diff_filespec *get_filespec(const char *name, const char *p)
        spec->size = strlen(p);
        spec->should_munmap = 0;
        spec->is_stdin = 1;
-       spec->driver = &no_func_name;
+       spec->driver = &section_headers;
 
        return spec;
 }
@@ -485,6 +520,7 @@ int show_range_diff(const char *range1, const char *range2,
                        opts.output_format = DIFF_FORMAT_PATCH;
                opts.flags.suppress_diff_headers = 1;
                opts.flags.dual_color_diffed_diffs = dual_color;
+               opts.flags.suppress_hunk_header_line_count = 1;
                opts.output_prefix = output_prefix_cb;
                strbuf_addstr(&indent, "    ");
                opts.output_prefix_data = &indent;