struct trailer_item {
struct list_head list;
+ /*
+ * If this is not a trailer line, the line is stored in value
+ * (excluding the terminating newline) and token is NULL.
+ */
char *token;
char *value;
};
#define TRAILER_ARG_STRING "$ARG"
+static const char *git_generated_prefixes[] = {
+ "Signed-off-by: ",
+ "(cherry picked from commit ",
+ NULL
+};
+
/* Iterate over the elements of the list. */
#define list_for_each_dir(pos, head, is_reverse) \
for (pos = is_reverse ? (head)->prev : (head)->next; \
static int same_token(struct trailer_item *a, struct arg_item *b)
{
- size_t a_len = token_len_without_separator(a->token, strlen(a->token));
- size_t b_len = token_len_without_separator(b->token, strlen(b->token));
- size_t min_len = (a_len > b_len) ? b_len : a_len;
+ size_t a_len, b_len, min_len;
+
+ if (!a->token)
+ return 0;
+
+ a_len = token_len_without_separator(a->token, strlen(a->token));
+ b_len = token_len_without_separator(b->token, strlen(b->token));
+ min_len = (a_len > b_len) ? b_len : a_len;
return !strncasecmp(a->token, b->token, min_len);
}
static void print_tok_val(FILE *outfile, const char *tok, const char *val)
{
- char c = last_non_space_char(tok);
+ char c;
+
+ if (!tok) {
+ fprintf(outfile, "%s\n", val);
+ return;
+ }
+
+ c = last_non_space_char(tok);
if (!c)
return;
if (strchr(separators, c))
static void duplicate_conf(struct conf_info *dst, const struct conf_info *src)
{
*dst = *src;
- if (src->name)
- dst->name = xstrdup(src->name);
- if (src->key)
- dst->key = xstrdup(src->key);
- if (src->command)
- dst->command = xstrdup(src->command);
+ dst->name = xstrdup_or_null(src->name);
+ dst->key = xstrdup_or_null(src->key);
+ dst->command = xstrdup_or_null(src->command);
}
static struct arg_item *get_conf_item(const char *name)
return item->conf.key ? !strncasecmp(tok, item->conf.key, tok_len) : 0;
}
-static int parse_trailer(struct strbuf *tok, struct strbuf *val,
- const struct conf_info **conf, const char *trailer)
+/*
+ * Return the location of the first separator in line, or -1 if there is no
+ * separator.
+ */
+static int find_separator(const char *line, const char *separators)
+{
+ int loc = strcspn(line, separators);
+ if (!line[loc])
+ return -1;
+ return loc;
+}
+
+/*
+ * Obtain the token, value, and conf from the given trailer.
+ *
+ * separator_pos must not be 0, since the token cannot be an empty string.
+ *
+ * If separator_pos is -1, interpret the whole trailer as a token.
+ */
+static void parse_trailer(struct strbuf *tok, struct strbuf *val,
+ const struct conf_info **conf, const char *trailer,
+ int separator_pos)
{
- size_t len;
- struct strbuf seps = STRBUF_INIT;
struct arg_item *item;
int tok_len;
struct list_head *pos;
- strbuf_addstr(&seps, separators);
- strbuf_addch(&seps, '=');
- len = strcspn(trailer, seps.buf);
- strbuf_release(&seps);
- if (len == 0) {
- int l = strlen(trailer);
- while (l > 0 && isspace(trailer[l - 1]))
- l--;
- return error(_("empty trailer token in trailer '%.*s'"), l, trailer);
- }
- if (len < strlen(trailer)) {
- strbuf_add(tok, trailer, len);
+ if (separator_pos != -1) {
+ strbuf_add(tok, trailer, separator_pos);
strbuf_trim(tok);
- strbuf_addstr(val, trailer + len + 1);
+ strbuf_addstr(val, trailer + separator_pos + 1);
strbuf_trim(val);
} else {
strbuf_addstr(tok, trailer);
break;
}
}
-
- return 0;
}
-static void add_trailer_item(struct list_head *head, char *tok, char *val)
+static struct trailer_item *add_trailer_item(struct list_head *head, char *tok,
+ char *val)
{
struct trailer_item *new = xcalloc(sizeof(*new), 1);
new->token = tok;
new->value = val;
list_add_tail(&new->list, head);
+ return new;
}
static void add_arg_item(struct list_head *arg_head, char *tok, char *val,
const struct conf_info *conf;
struct list_head *pos;
+ /*
+ * In command-line arguments, '=' is accepted (in addition to the
+ * separators that are defined).
+ */
+ char *cl_separators = xstrfmt("=%s", separators);
+
/* Add an arg item for each configured trailer with a command */
list_for_each(pos, &conf_head) {
item = list_entry(pos, struct arg_item, list);
/* Add an arg item for each trailer on the command line */
for_each_string_list_item(tr, trailers) {
- if (!parse_trailer(&tok, &val, &conf, tr->string))
+ int separator_pos = find_separator(tr->string, cl_separators);
+ if (separator_pos == 0) {
+ struct strbuf sb = STRBUF_INIT;
+ strbuf_addstr(&sb, tr->string);
+ strbuf_trim(&sb);
+ error(_("empty trailer token in trailer '%.*s'"),
+ (int) sb.len, sb.buf);
+ strbuf_release(&sb);
+ } else {
+ parse_trailer(&tok, &val, &conf, tr->string,
+ separator_pos);
add_arg_item(arg_head,
strbuf_detach(&tok, NULL),
strbuf_detach(&val, NULL),
conf);
+ }
}
+
+ free(cl_separators);
}
static struct strbuf **read_input_file(const char *file)
static int find_trailer_start(struct strbuf **lines, int count)
{
int start, end_of_title, only_spaces = 1;
+ int recognized_prefix = 0, trailer_lines = 0, non_trailer_lines = 0;
+ /*
+ * Number of possible continuation lines encountered. This will be
+ * reset to 0 if we encounter a trailer (since those lines are to be
+ * considered continuations of that trailer), and added to
+ * non_trailer_lines if we encounter a non-trailer (since those lines
+ * are to be considered non-trailers).
+ */
+ int possible_continuation_lines = 0;
/* The first paragraph is the title and cannot be trailers */
for (start = 0; start < count; start++) {
end_of_title = start;
/*
- * Get the start of the trailers by looking starting from the end
- * for a line with only spaces before lines with one separator.
+ * Get the start of the trailers by looking starting from the end for a
+ * blank line before a set of non-blank lines that (i) are all
+ * trailers, or (ii) contains at least one Git-generated trailer and
+ * consists of at least 25% trailers.
*/
for (start = count - 1; start >= end_of_title; start--) {
- if (lines[start]->buf[0] == comment_line_char)
+ const char **p;
+ int separator_pos;
+
+ if (lines[start]->buf[0] == comment_line_char) {
+ non_trailer_lines += possible_continuation_lines;
+ possible_continuation_lines = 0;
continue;
+ }
if (contains_only_spaces(lines[start]->buf)) {
if (only_spaces)
continue;
- return start + 1;
+ non_trailer_lines += possible_continuation_lines;
+ if (recognized_prefix &&
+ trailer_lines * 3 >= non_trailer_lines)
+ return start + 1;
+ if (trailer_lines && !non_trailer_lines)
+ return start + 1;
+ return count;
}
- if (strcspn(lines[start]->buf, separators) < lines[start]->len) {
- if (only_spaces)
- only_spaces = 0;
- continue;
+ only_spaces = 0;
+
+ for (p = git_generated_prefixes; *p; p++) {
+ if (starts_with(lines[start]->buf, *p)) {
+ trailer_lines++;
+ possible_continuation_lines = 0;
+ recognized_prefix = 1;
+ goto continue_outer_loop;
+ }
+ }
+
+ separator_pos = find_separator(lines[start]->buf, separators);
+ if (separator_pos >= 1 && !isspace(lines[start]->buf[0])) {
+ struct list_head *pos;
+
+ trailer_lines++;
+ possible_continuation_lines = 0;
+ if (recognized_prefix)
+ continue;
+ list_for_each(pos, &conf_head) {
+ struct arg_item *item;
+ item = list_entry(pos, struct arg_item, list);
+ if (token_matches_item(lines[start]->buf, item,
+ separator_pos)) {
+ recognized_prefix = 1;
+ break;
+ }
+ }
+ } else if (isspace(lines[start]->buf[0]))
+ possible_continuation_lines++;
+ else {
+ non_trailer_lines++;
+ non_trailer_lines += possible_continuation_lines;
+ possible_continuation_lines = 0;
}
- return count;
+continue_outer_loop:
+ ;
}
- return only_spaces ? count : 0;
+ return count;
}
/* Get the index of the end of the trailers */
int patch_start, trailer_start, trailer_end, i;
struct strbuf tok = STRBUF_INIT;
struct strbuf val = STRBUF_INIT;
+ struct trailer_item *last = NULL;
/* Get the line count */
while (lines[count])
/* Parse trailer lines */
for (i = trailer_start; i < trailer_end; i++) {
- if (lines[i]->buf[0] != comment_line_char &&
- !parse_trailer(&tok, &val, NULL, lines[i]->buf))
+ int separator_pos;
+ if (lines[i]->buf[0] == comment_line_char)
+ continue;
+ if (last && isspace(lines[i]->buf[0])) {
+ struct strbuf sb = STRBUF_INIT;
+ strbuf_addf(&sb, "%s\n%s", last->value, lines[i]->buf);
+ strbuf_strip_suffix(&sb, "\n");
+ free(last->value);
+ last->value = strbuf_detach(&sb, NULL);
+ continue;
+ }
+ separator_pos = find_separator(lines[i]->buf, separators);
+ if (separator_pos >= 1) {
+ parse_trailer(&tok, &val, NULL, lines[i]->buf,
+ separator_pos);
+ last = add_trailer_item(head,
+ strbuf_detach(&tok, NULL),
+ strbuf_detach(&val, NULL));
+ } else {
+ strbuf_addbuf(&val, lines[i]);
+ strbuf_strip_suffix(&val, "\n");
add_trailer_item(head,
- strbuf_detach(&tok, NULL),
+ NULL,
strbuf_detach(&val, NULL));
+ last = NULL;
+ }
}
return trailer_end;