Read trailers from a file or from stdin, parse the trailers and then
put the result into a doubly linked list.
Signed-off-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
trailer.c | 123 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 123 insertions(+)
diff --git a/trailer.c b/trailer.c
index f79a369..40ad1a1 100644
--- a/trailer.c
+++ b/trailer.c
@@ -51,6 +51,14 @@ static size_t alnum_len(const char *buf, size_t len)
return len;
}
+static inline int contains_only_spaces(const char *str)
+{
+ const char *s = str;
+ while (*s && isspace(*s))
+ s++;
+ return !*s;
+}
+
static void free_trailer_item(struct trailer_item *item)
{
free(item->conf.name);
@@ -509,3 +517,118 @@ static struct trailer_item *process_command_line_args(struct string_list *traile
return arg_tok_first;
}
+
+static struct strbuf **read_input_file(const char *file)
+{
+ struct strbuf **lines;
+ struct strbuf sb = STRBUF_INIT;
+
+ if (file) {
+ if (strbuf_read_file(&sb, file, 0) < 0)
+ die_errno(_("could not read input file '%s'"), file);
+ } else {
+ if (strbuf_read(&sb, fileno(stdin), 0) < 0)
+ die_errno(_("could not read from stdin"));
+ }
+
+ lines = strbuf_split(&sb, '\n');
+
+ strbuf_release(&sb);
+
+ return lines;
+}
+
+/*
+ * Return the (0 based) index of the start of the patch or the line
+ * count if there is no patch in the message.
+ */
+static int find_patch_start(struct strbuf **lines, int count)
+{
+ int i;
+
+ /* Get the start of the patch part if any */
+ for (i = 0; i < count; i++) {
+ if (starts_with(lines[i]->buf, "---"))
+ return i;
+ }
+
+ return count;
+}
+
+/*
+ * Return the (0 based) index of the first trailer line or count if
+ * there are no trailers. Trailers are searched only in the lines from
+ * index (count - 1) down to index 0.
+ */
+static int find_trailer_start(struct strbuf **lines, int count)
+{
+ int start, only_spaces = 1;
+
+ /*
+ * Get the start of the trailers by looking starting from the end
+ * for a line with only spaces before lines with one ':'.
+ */
+ for (start = count - 1; start >= 0; start--) {
+ if (lines[start]->buf[0] == comment_line_char)
+ continue;
+ if (contains_only_spaces(lines[start]->buf)) {
+ if (only_spaces)
+ continue;
+ return start + 1;
+ }
+ if (strchr(lines[start]->buf, ':')) {
+ if (only_spaces)
+ only_spaces = 0;
+ continue;
+ }
+ return count;
+ }
+
+ return only_spaces ? count : 0;
+}
+
+static int has_blank_line_before(struct strbuf **lines, int start)
+{
+ for (;start >= 0; start--) {
+ if (lines[start]->buf[0] == comment_line_char)
+ continue;
+ return contains_only_spaces(lines[start]->buf);
+ }
+ return 0;
+}
+
+static void print_lines(struct strbuf **lines, int start, int end)
+{
+ int i;
+ for (i = start; lines[i] && i < end; i++)
+ printf("%s", lines[i]->buf);
+}
+
+static int process_input_file(struct strbuf **lines,
+ struct trailer_item **in_tok_first,
+ struct trailer_item **in_tok_last)
+{
+ int count = 0;
+ int patch_start, trailer_start, i;
+
+ /* Get the line count */
+ while (lines[count])
+ count++;
+
+ patch_start = find_patch_start(lines, count);
+ trailer_start = find_trailer_start(lines, patch_start);
+
+ /* Print lines before the trailers as is */
+ print_lines(lines, 0, trailer_start);
+
+ if (!has_blank_line_before(lines, trailer_start - 1))
+ printf("\n");
+
+ /* Parse trailer lines */
+ for (i = trailer_start; i < patch_start; i++) {
+ struct trailer_item *new = create_trailer_item(lines[i]->buf);
+ add_trailer_item(in_tok_first, in_tok_last, new);
+ }
+
+ return patch_start;
+}
--
1.9.rc0.17.g651113e
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