#include "cache.h"
#include "string-list.h"
+#include "run-command.h"
+#include "string-list.h"
+#include "trailer.h"
/*
* Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org>
*/
static char *separators = ":";
+#define TRAILER_ARG_STRING "$ARG"
+
static int after_or_end(enum action_where where)
{
return (where == WHERE_AFTER) || (where == WHERE_END);
return same_token(a, b) && same_value(a, b);
}
+static inline int contains_only_spaces(const char *str)
+{
+ const char *s = str;
+ while (*s && isspace(*s))
+ s++;
+ return !*s;
+}
+
+static inline void strbuf_replace(struct strbuf *sb, const char *a, const char *b)
+{
+ const char *ptr = strstr(sb->buf, a);
+ if (ptr)
+ strbuf_splice(sb, ptr - sb->buf, strlen(a), b, strlen(b));
+}
+
static void free_trailer_item(struct trailer_item *item)
{
free(item->conf.name);
free(item);
}
+static char last_non_space_char(const char *s)
+{
+ int i;
+ for (i = strlen(s) - 1; i >= 0; i--)
+ if (!isspace(s[i]))
+ return s[i];
+ return '\0';
+}
+
+static void print_tok_val(const char *tok, const char *val)
+{
+ char c = last_non_space_char(tok);
+ if (!c)
+ return;
+ if (strchr(separators, c))
+ printf("%s%s\n", tok, val);
+ else
+ printf("%s%c %s\n", tok, separators[0], val);
+}
+
+static void print_all(struct trailer_item *first, int trim_empty)
+{
+ struct trailer_item *item;
+ for (item = first; item; item = item->next) {
+ if (!trim_empty || strlen(item->value) > 0)
+ print_tok_val(item->token, item->value);
+ }
+}
+
static void update_last(struct trailer_item **last)
{
if (*last)
return item;
}
+static int read_from_command(struct child_process *cp, struct strbuf *buf)
+{
+ if (run_command(cp))
+ return error("running trailer command '%s' failed", cp->argv[0]);
+ if (strbuf_read(buf, cp->out, 1024) < 1)
+ return error("reading from trailer command '%s' failed", cp->argv[0]);
+ strbuf_trim(buf);
+ return 0;
+}
+
+static const char *apply_command(const char *command, const char *arg)
+{
+ struct strbuf cmd = STRBUF_INIT;
+ struct strbuf buf = STRBUF_INIT;
+ struct child_process cp = CHILD_PROCESS_INIT;
+ const char *argv[] = {NULL, NULL};
+ const char *result;
+
+ strbuf_addstr(&cmd, command);
+ if (arg)
+ strbuf_replace(&cmd, TRAILER_ARG_STRING, arg);
+
+ argv[0] = cmd.buf;
+ cp.argv = argv;
+ cp.env = local_repo_env;
+ cp.no_stdin = 1;
+ cp.out = -1;
+ cp.use_shell = 1;
+
+ if (read_from_command(&cp, &buf)) {
+ strbuf_release(&buf);
+ result = xstrdup("");
+ } else
+ result = strbuf_detach(&buf, NULL);
+
+ strbuf_release(&cmd);
+ return result;
+}
+
+static void apply_item_command(struct trailer_item *in_tok, struct trailer_item *arg_tok)
+{
+ if (arg_tok->conf.command) {
+ const char *arg;
+ if (arg_tok->value && arg_tok->value[0]) {
+ arg = arg_tok->value;
+ } else {
+ if (in_tok && in_tok->value)
+ arg = xstrdup(in_tok->value);
+ else
+ arg = xstrdup("");
+ }
+ arg_tok->value = apply_command(arg_tok->conf.command, arg);
+ free((char *)arg);
+ }
+}
+
static void apply_arg_if_exists(struct trailer_item *in_tok,
struct trailer_item *arg_tok,
struct trailer_item *on_tok,
free_trailer_item(arg_tok);
break;
case EXISTS_REPLACE:
+ apply_item_command(in_tok, arg_tok);
add_arg_to_input_list(on_tok, arg_tok,
in_tok_first, in_tok_last);
remove_from_list(in_tok, in_tok_first, in_tok_last);
free_trailer_item(in_tok);
break;
case EXISTS_ADD:
+ apply_item_command(in_tok, arg_tok);
add_arg_to_input_list(on_tok, arg_tok,
in_tok_first, in_tok_last);
break;
case EXISTS_ADD_IF_DIFFERENT:
+ apply_item_command(in_tok, arg_tok);
if (check_if_different(in_tok, arg_tok, 1))
add_arg_to_input_list(on_tok, arg_tok,
in_tok_first, in_tok_last);
free_trailer_item(arg_tok);
break;
case EXISTS_ADD_IF_DIFFERENT_NEIGHBOR:
+ apply_item_command(in_tok, arg_tok);
if (check_if_different(on_tok, arg_tok, 0))
add_arg_to_input_list(on_tok, arg_tok,
in_tok_first, in_tok_last);
case MISSING_ADD:
where = arg_tok->conf.where;
in_tok = after_or_end(where) ? in_tok_last : in_tok_first;
+ apply_item_command(NULL, arg_tok);
if (*in_tok) {
add_arg_to_input_list(*in_tok, arg_tok,
in_tok_first, in_tok_last);
strbuf_addch(&seps, '=');
len = strcspn(trailer, seps.buf);
strbuf_release(&seps);
- if (len == 0)
- return error(_("empty trailer token in trailer '%s'"), trailer);
+ 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);
strbuf_trim(tok);
char *tok, char *val)
{
struct trailer_item *new = xcalloc(sizeof(*new), 1);
- new->value = val;
+ new->value = val ? val : xstrdup("");
if (conf_item) {
duplicate_conf(&new->conf, &conf_item->conf);
struct trailer_item *arg_tok_first = NULL;
struct trailer_item *arg_tok_last = NULL;
struct string_list_item *tr;
+ struct trailer_item *item;
+
+ /* Add a trailer item for each configured trailer with a command */
+ for (item = first_conf_item; item; item = item->next) {
+ if (item->conf.command) {
+ struct trailer_item *new = new_trailer_item(item, NULL, NULL);
+ add_trailer_item(&arg_tok_first, &arg_tok_last, new);
+ }
+ }
+ /* Add a trailer item for each trailer on the command line */
for_each_string_list_item(tr, trailers) {
struct trailer_item *new = create_trailer_item(tr->string);
add_trailer_item(&arg_tok_first, &arg_tok_last, new);
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 separator.
+ */
+ 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 (strcspn(lines[start]->buf, separators) < lines[start]->len) {
+ 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++) {
+ if (lines[i]->buf[0] != comment_line_char) {
+ struct trailer_item *new = create_trailer_item(lines[i]->buf);
+ add_trailer_item(in_tok_first, in_tok_last, new);
+ }
+ }
+
+ return patch_start;
+}
+
+static void free_all(struct trailer_item **first)
+{
+ while (*first) {
+ struct trailer_item *item = remove_first(first);
+ free_trailer_item(item);
+ }
+}
+
+void process_trailers(const char *file, int trim_empty, struct string_list *trailers)
+{
+ struct trailer_item *in_tok_first = NULL;
+ struct trailer_item *in_tok_last = NULL;
+ struct trailer_item *arg_tok_first;
+ struct strbuf **lines;
+ int patch_start;
+
+ /* Default config must be setup first */
+ git_config(git_trailer_default_config, NULL);
+ git_config(git_trailer_config, NULL);
+
+ lines = read_input_file(file);
+
+ /* Print the lines before the trailers */
+ patch_start = process_input_file(lines, &in_tok_first, &in_tok_last);
+
+ arg_tok_first = process_command_line_args(trailers);
+
+ process_trailers_lists(&in_tok_first, &in_tok_last, &arg_tok_first);
+
+ print_all(in_tok_first, trim_empty);
+
+ free_all(&in_tok_first);
+
+ /* Print the lines after the trailers as is */
+ print_lines(lines, patch_start, INT_MAX);
+
+ strbuf_list_free(lines);
+}