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![Paul Tan](/assets/img/avatar_default.png)
Since 271440e
(git-am: make it easier after fixing up an unapplicable
patch., 2005-10-25), when "git am" is run again after being paused, the
current mail message will not be re-parsed, but instead the contents of
the state directory's patch, msg and author-script files will be used
as-is instead.
Re-implement this in builtin/am.c.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
982 lines
23 KiB
C
982 lines
23 KiB
C
/*
|
|
* Builtin "git am"
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*
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* Based on git-am.sh by Junio C Hamano.
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*/
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#include "cache.h"
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#include "builtin.h"
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#include "exec_cmd.h"
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#include "parse-options.h"
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#include "dir.h"
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#include "run-command.h"
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#include "quote.h"
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#include "lockfile.h"
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#include "cache-tree.h"
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#include "refs.h"
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#include "commit.h"
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#include "diff.h"
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#include "diffcore.h"
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/**
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* Returns 1 if the file is empty or does not exist, 0 otherwise.
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*/
|
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static int is_empty_file(const char *filename)
|
|
{
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struct stat st;
|
|
|
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if (stat(filename, &st) < 0) {
|
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if (errno == ENOENT)
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return 1;
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die_errno(_("could not stat %s"), filename);
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|
}
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return !st.st_size;
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}
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/**
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* Like strbuf_getline(), but treats both '\n' and "\r\n" as line terminators.
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*/
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static int strbuf_getline_crlf(struct strbuf *sb, FILE *fp)
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|
{
|
|
if (strbuf_getwholeline(sb, fp, '\n'))
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return EOF;
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if (sb->buf[sb->len - 1] == '\n') {
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strbuf_setlen(sb, sb->len - 1);
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if (sb->len > 0 && sb->buf[sb->len - 1] == '\r')
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strbuf_setlen(sb, sb->len - 1);
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}
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return 0;
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}
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/**
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* Returns the length of the first line of msg.
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*/
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static int linelen(const char *msg)
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{
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return strchrnul(msg, '\n') - msg;
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}
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enum patch_format {
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PATCH_FORMAT_UNKNOWN = 0,
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PATCH_FORMAT_MBOX
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};
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struct am_state {
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/* state directory path */
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char *dir;
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/* current and last patch numbers, 1-indexed */
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int cur;
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int last;
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/* commit metadata and message */
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char *author_name;
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char *author_email;
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char *author_date;
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char *msg;
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size_t msg_len;
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/* number of digits in patch filename */
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int prec;
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};
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/**
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* Initializes am_state with the default values. The state directory is set to
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* dir.
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*/
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static void am_state_init(struct am_state *state, const char *dir)
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{
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memset(state, 0, sizeof(*state));
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assert(dir);
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state->dir = xstrdup(dir);
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state->prec = 4;
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}
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/**
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* Releases memory allocated by an am_state.
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*/
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static void am_state_release(struct am_state *state)
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{
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free(state->dir);
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free(state->author_name);
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free(state->author_email);
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free(state->author_date);
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free(state->msg);
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}
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/**
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* Returns path relative to the am_state directory.
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*/
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static inline const char *am_path(const struct am_state *state, const char *path)
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{
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return mkpath("%s/%s", state->dir, path);
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}
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/**
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* Returns 1 if there is an am session in progress, 0 otherwise.
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*/
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static int am_in_progress(const struct am_state *state)
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{
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struct stat st;
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if (lstat(state->dir, &st) < 0 || !S_ISDIR(st.st_mode))
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return 0;
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if (lstat(am_path(state, "last"), &st) || !S_ISREG(st.st_mode))
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return 0;
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if (lstat(am_path(state, "next"), &st) || !S_ISREG(st.st_mode))
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return 0;
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return 1;
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}
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/**
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* Reads the contents of `file` in the `state` directory into `sb`. Returns the
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* number of bytes read on success, -1 if the file does not exist. If `trim` is
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* set, trailing whitespace will be removed.
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*/
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static int read_state_file(struct strbuf *sb, const struct am_state *state,
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const char *file, int trim)
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{
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strbuf_reset(sb);
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if (strbuf_read_file(sb, am_path(state, file), 0) >= 0) {
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if (trim)
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strbuf_trim(sb);
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return sb->len;
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}
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if (errno == ENOENT)
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return -1;
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die_errno(_("could not read '%s'"), am_path(state, file));
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}
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/**
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* Reads a KEY=VALUE shell variable assignment from `fp`, returning the VALUE
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* as a newly-allocated string. VALUE must be a quoted string, and the KEY must
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* match `key`. Returns NULL on failure.
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*
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* This is used by read_author_script() to read the GIT_AUTHOR_* variables from
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* the author-script.
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*/
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static char *read_shell_var(FILE *fp, const char *key)
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{
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struct strbuf sb = STRBUF_INIT;
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const char *str;
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if (strbuf_getline(&sb, fp, '\n'))
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goto fail;
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if (!skip_prefix(sb.buf, key, &str))
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goto fail;
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if (!skip_prefix(str, "=", &str))
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goto fail;
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strbuf_remove(&sb, 0, str - sb.buf);
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str = sq_dequote(sb.buf);
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if (!str)
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goto fail;
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return strbuf_detach(&sb, NULL);
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|
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fail:
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strbuf_release(&sb);
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return NULL;
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}
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/**
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* Reads and parses the state directory's "author-script" file, and sets
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* state->author_name, state->author_email and state->author_date accordingly.
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* Returns 0 on success, -1 if the file could not be parsed.
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*
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* The author script is of the format:
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*
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* GIT_AUTHOR_NAME='$author_name'
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* GIT_AUTHOR_EMAIL='$author_email'
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* GIT_AUTHOR_DATE='$author_date'
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*
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* where $author_name, $author_email and $author_date are quoted. We are strict
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* with our parsing, as the file was meant to be eval'd in the old git-am.sh
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* script, and thus if the file differs from what this function expects, it is
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* better to bail out than to do something that the user does not expect.
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*/
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static int read_author_script(struct am_state *state)
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{
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const char *filename = am_path(state, "author-script");
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FILE *fp;
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assert(!state->author_name);
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assert(!state->author_email);
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assert(!state->author_date);
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fp = fopen(filename, "r");
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if (!fp) {
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if (errno == ENOENT)
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return 0;
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die_errno(_("could not open '%s' for reading"), filename);
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}
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state->author_name = read_shell_var(fp, "GIT_AUTHOR_NAME");
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if (!state->author_name) {
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fclose(fp);
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return -1;
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}
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state->author_email = read_shell_var(fp, "GIT_AUTHOR_EMAIL");
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if (!state->author_email) {
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fclose(fp);
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return -1;
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}
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state->author_date = read_shell_var(fp, "GIT_AUTHOR_DATE");
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if (!state->author_date) {
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fclose(fp);
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return -1;
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}
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if (fgetc(fp) != EOF) {
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fclose(fp);
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return -1;
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}
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fclose(fp);
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return 0;
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}
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/**
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* Saves state->author_name, state->author_email and state->author_date in the
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* state directory's "author-script" file.
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*/
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static void write_author_script(const struct am_state *state)
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{
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struct strbuf sb = STRBUF_INIT;
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strbuf_addstr(&sb, "GIT_AUTHOR_NAME=");
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sq_quote_buf(&sb, state->author_name);
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strbuf_addch(&sb, '\n');
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strbuf_addstr(&sb, "GIT_AUTHOR_EMAIL=");
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sq_quote_buf(&sb, state->author_email);
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strbuf_addch(&sb, '\n');
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strbuf_addstr(&sb, "GIT_AUTHOR_DATE=");
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sq_quote_buf(&sb, state->author_date);
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strbuf_addch(&sb, '\n');
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write_file(am_path(state, "author-script"), 1, "%s", sb.buf);
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strbuf_release(&sb);
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}
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/**
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* Reads the commit message from the state directory's "final-commit" file,
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* setting state->msg to its contents and state->msg_len to the length of its
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* contents in bytes.
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*
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* Returns 0 on success, -1 if the file does not exist.
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*/
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static int read_commit_msg(struct am_state *state)
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{
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struct strbuf sb = STRBUF_INIT;
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assert(!state->msg);
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if (read_state_file(&sb, state, "final-commit", 0) < 0) {
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strbuf_release(&sb);
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return -1;
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}
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state->msg = strbuf_detach(&sb, &state->msg_len);
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return 0;
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}
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/**
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* Saves state->msg in the state directory's "final-commit" file.
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*/
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static void write_commit_msg(const struct am_state *state)
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{
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int fd;
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const char *filename = am_path(state, "final-commit");
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fd = xopen(filename, O_WRONLY | O_CREAT, 0666);
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if (write_in_full(fd, state->msg, state->msg_len) < 0)
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die_errno(_("could not write to %s"), filename);
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close(fd);
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}
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/**
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* Loads state from disk.
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*/
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static void am_load(struct am_state *state)
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{
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struct strbuf sb = STRBUF_INIT;
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if (read_state_file(&sb, state, "next", 1) < 0)
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die("BUG: state file 'next' does not exist");
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state->cur = strtol(sb.buf, NULL, 10);
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if (read_state_file(&sb, state, "last", 1) < 0)
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die("BUG: state file 'last' does not exist");
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state->last = strtol(sb.buf, NULL, 10);
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if (read_author_script(state) < 0)
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die(_("could not parse author script"));
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read_commit_msg(state);
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strbuf_release(&sb);
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}
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/**
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* Removes the am_state directory, forcefully terminating the current am
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* session.
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*/
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static void am_destroy(const struct am_state *state)
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{
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struct strbuf sb = STRBUF_INIT;
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strbuf_addstr(&sb, state->dir);
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remove_dir_recursively(&sb, 0);
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strbuf_release(&sb);
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}
|
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/**
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* Determines if the file looks like a piece of RFC2822 mail by grabbing all
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|
* non-indented lines and checking if they look like they begin with valid
|
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* header field names.
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*
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* Returns 1 if the file looks like a piece of mail, 0 otherwise.
|
|
*/
|
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static int is_mail(FILE *fp)
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{
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|
const char *header_regex = "^[!-9;-~]+:";
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|
struct strbuf sb = STRBUF_INIT;
|
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regex_t regex;
|
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int ret = 1;
|
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|
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if (fseek(fp, 0L, SEEK_SET))
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die_errno(_("fseek failed"));
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|
|
if (regcomp(®ex, header_regex, REG_NOSUB | REG_EXTENDED))
|
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die("invalid pattern: %s", header_regex);
|
|
|
|
while (!strbuf_getline_crlf(&sb, fp)) {
|
|
if (!sb.len)
|
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break; /* End of header */
|
|
|
|
/* Ignore indented folded lines */
|
|
if (*sb.buf == '\t' || *sb.buf == ' ')
|
|
continue;
|
|
|
|
/* It's a header if it matches header_regex */
|
|
if (regexec(®ex, sb.buf, 0, NULL, 0)) {
|
|
ret = 0;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
done:
|
|
regfree(®ex);
|
|
strbuf_release(&sb);
|
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return ret;
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}
|
|
|
|
/**
|
|
* Attempts to detect the patch_format of the patches contained in `paths`,
|
|
* returning the PATCH_FORMAT_* enum value. Returns PATCH_FORMAT_UNKNOWN if
|
|
* detection fails.
|
|
*/
|
|
static int detect_patch_format(const char **paths)
|
|
{
|
|
enum patch_format ret = PATCH_FORMAT_UNKNOWN;
|
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struct strbuf l1 = STRBUF_INIT;
|
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FILE *fp;
|
|
|
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/*
|
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* We default to mbox format if input is from stdin and for directories
|
|
*/
|
|
if (!*paths || !strcmp(*paths, "-") || is_directory(*paths))
|
|
return PATCH_FORMAT_MBOX;
|
|
|
|
/*
|
|
* Otherwise, check the first few lines of the first patch, starting
|
|
* from the first non-blank line, to try to detect its format.
|
|
*/
|
|
|
|
fp = xfopen(*paths, "r");
|
|
|
|
while (!strbuf_getline_crlf(&l1, fp)) {
|
|
if (l1.len)
|
|
break;
|
|
}
|
|
|
|
if (starts_with(l1.buf, "From ") || starts_with(l1.buf, "From: ")) {
|
|
ret = PATCH_FORMAT_MBOX;
|
|
goto done;
|
|
}
|
|
|
|
if (l1.len && is_mail(fp)) {
|
|
ret = PATCH_FORMAT_MBOX;
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
fclose(fp);
|
|
strbuf_release(&l1);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Splits out individual email patches from `paths`, where each path is either
|
|
* a mbox file or a Maildir. Returns 0 on success, -1 on failure.
|
|
*/
|
|
static int split_mail_mbox(struct am_state *state, const char **paths)
|
|
{
|
|
struct child_process cp = CHILD_PROCESS_INIT;
|
|
struct strbuf last = STRBUF_INIT;
|
|
|
|
cp.git_cmd = 1;
|
|
argv_array_push(&cp.args, "mailsplit");
|
|
argv_array_pushf(&cp.args, "-d%d", state->prec);
|
|
argv_array_pushf(&cp.args, "-o%s", state->dir);
|
|
argv_array_push(&cp.args, "-b");
|
|
argv_array_push(&cp.args, "--");
|
|
argv_array_pushv(&cp.args, paths);
|
|
|
|
if (capture_command(&cp, &last, 8))
|
|
return -1;
|
|
|
|
state->cur = 1;
|
|
state->last = strtol(last.buf, NULL, 10);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Splits a list of files/directories into individual email patches. Each path
|
|
* in `paths` must be a file/directory that is formatted according to
|
|
* `patch_format`.
|
|
*
|
|
* Once split out, the individual email patches will be stored in the state
|
|
* directory, with each patch's filename being its index, padded to state->prec
|
|
* digits.
|
|
*
|
|
* state->cur will be set to the index of the first mail, and state->last will
|
|
* be set to the index of the last mail.
|
|
*
|
|
* Returns 0 on success, -1 on failure.
|
|
*/
|
|
static int split_mail(struct am_state *state, enum patch_format patch_format,
|
|
const char **paths)
|
|
{
|
|
switch (patch_format) {
|
|
case PATCH_FORMAT_MBOX:
|
|
return split_mail_mbox(state, paths);
|
|
default:
|
|
die("BUG: invalid patch_format");
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Setup a new am session for applying patches
|
|
*/
|
|
static void am_setup(struct am_state *state, enum patch_format patch_format,
|
|
const char **paths)
|
|
{
|
|
if (!patch_format)
|
|
patch_format = detect_patch_format(paths);
|
|
|
|
if (!patch_format) {
|
|
fprintf_ln(stderr, _("Patch format detection failed."));
|
|
exit(128);
|
|
}
|
|
|
|
if (mkdir(state->dir, 0777) < 0 && errno != EEXIST)
|
|
die_errno(_("failed to create directory '%s'"), state->dir);
|
|
|
|
if (split_mail(state, patch_format, paths) < 0) {
|
|
am_destroy(state);
|
|
die(_("Failed to split patches."));
|
|
}
|
|
|
|
/*
|
|
* NOTE: Since the "next" and "last" files determine if an am_state
|
|
* session is in progress, they should be written last.
|
|
*/
|
|
|
|
write_file(am_path(state, "next"), 1, "%d", state->cur);
|
|
|
|
write_file(am_path(state, "last"), 1, "%d", state->last);
|
|
}
|
|
|
|
/**
|
|
* Increments the patch pointer, and cleans am_state for the application of the
|
|
* next patch.
|
|
*/
|
|
static void am_next(struct am_state *state)
|
|
{
|
|
free(state->author_name);
|
|
state->author_name = NULL;
|
|
|
|
free(state->author_email);
|
|
state->author_email = NULL;
|
|
|
|
free(state->author_date);
|
|
state->author_date = NULL;
|
|
|
|
free(state->msg);
|
|
state->msg = NULL;
|
|
state->msg_len = 0;
|
|
|
|
unlink(am_path(state, "author-script"));
|
|
unlink(am_path(state, "final-commit"));
|
|
|
|
state->cur++;
|
|
write_file(am_path(state, "next"), 1, "%d", state->cur);
|
|
}
|
|
|
|
/**
|
|
* Returns the filename of the current patch email.
|
|
*/
|
|
static const char *msgnum(const struct am_state *state)
|
|
{
|
|
static struct strbuf sb = STRBUF_INIT;
|
|
|
|
strbuf_reset(&sb);
|
|
strbuf_addf(&sb, "%0*d", state->prec, state->cur);
|
|
|
|
return sb.buf;
|
|
}
|
|
|
|
/**
|
|
* Refresh and write index.
|
|
*/
|
|
static void refresh_and_write_cache(void)
|
|
{
|
|
struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
|
|
|
|
hold_locked_index(lock_file, 1);
|
|
refresh_cache(REFRESH_QUIET);
|
|
if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
|
|
die(_("unable to write index file"));
|
|
}
|
|
|
|
/**
|
|
* Returns 1 if the index differs from HEAD, 0 otherwise. When on an unborn
|
|
* branch, returns 1 if there are entries in the index, 0 otherwise. If an
|
|
* strbuf is provided, the space-separated list of files that differ will be
|
|
* appended to it.
|
|
*/
|
|
static int index_has_changes(struct strbuf *sb)
|
|
{
|
|
unsigned char head[GIT_SHA1_RAWSZ];
|
|
int i;
|
|
|
|
if (!get_sha1_tree("HEAD", head)) {
|
|
struct diff_options opt;
|
|
|
|
diff_setup(&opt);
|
|
DIFF_OPT_SET(&opt, EXIT_WITH_STATUS);
|
|
if (!sb)
|
|
DIFF_OPT_SET(&opt, QUICK);
|
|
do_diff_cache(head, &opt);
|
|
diffcore_std(&opt);
|
|
for (i = 0; sb && i < diff_queued_diff.nr; i++) {
|
|
if (i)
|
|
strbuf_addch(sb, ' ');
|
|
strbuf_addstr(sb, diff_queued_diff.queue[i]->two->path);
|
|
}
|
|
diff_flush(&opt);
|
|
return DIFF_OPT_TST(&opt, HAS_CHANGES) != 0;
|
|
} else {
|
|
for (i = 0; sb && i < active_nr; i++) {
|
|
if (i)
|
|
strbuf_addch(sb, ' ');
|
|
strbuf_addstr(sb, active_cache[i]->name);
|
|
}
|
|
return !!active_nr;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parses `mail` using git-mailinfo, extracting its patch and authorship info.
|
|
* state->msg will be set to the patch message. state->author_name,
|
|
* state->author_email and state->author_date will be set to the patch author's
|
|
* name, email and date respectively. The patch body will be written to the
|
|
* state directory's "patch" file.
|
|
*
|
|
* Returns 1 if the patch should be skipped, 0 otherwise.
|
|
*/
|
|
static int parse_mail(struct am_state *state, const char *mail)
|
|
{
|
|
FILE *fp;
|
|
struct child_process cp = CHILD_PROCESS_INIT;
|
|
struct strbuf sb = STRBUF_INIT;
|
|
struct strbuf msg = STRBUF_INIT;
|
|
struct strbuf author_name = STRBUF_INIT;
|
|
struct strbuf author_date = STRBUF_INIT;
|
|
struct strbuf author_email = STRBUF_INIT;
|
|
int ret = 0;
|
|
|
|
cp.git_cmd = 1;
|
|
cp.in = xopen(mail, O_RDONLY, 0);
|
|
cp.out = xopen(am_path(state, "info"), O_WRONLY | O_CREAT, 0777);
|
|
|
|
argv_array_push(&cp.args, "mailinfo");
|
|
argv_array_push(&cp.args, am_path(state, "msg"));
|
|
argv_array_push(&cp.args, am_path(state, "patch"));
|
|
|
|
if (run_command(&cp) < 0)
|
|
die("could not parse patch");
|
|
|
|
close(cp.in);
|
|
close(cp.out);
|
|
|
|
/* Extract message and author information */
|
|
fp = xfopen(am_path(state, "info"), "r");
|
|
while (!strbuf_getline(&sb, fp, '\n')) {
|
|
const char *x;
|
|
|
|
if (skip_prefix(sb.buf, "Subject: ", &x)) {
|
|
if (msg.len)
|
|
strbuf_addch(&msg, '\n');
|
|
strbuf_addstr(&msg, x);
|
|
} else if (skip_prefix(sb.buf, "Author: ", &x))
|
|
strbuf_addstr(&author_name, x);
|
|
else if (skip_prefix(sb.buf, "Email: ", &x))
|
|
strbuf_addstr(&author_email, x);
|
|
else if (skip_prefix(sb.buf, "Date: ", &x))
|
|
strbuf_addstr(&author_date, x);
|
|
}
|
|
fclose(fp);
|
|
|
|
/* Skip pine's internal folder data */
|
|
if (!strcmp(author_name.buf, "Mail System Internal Data")) {
|
|
ret = 1;
|
|
goto finish;
|
|
}
|
|
|
|
if (is_empty_file(am_path(state, "patch"))) {
|
|
printf_ln(_("Patch is empty. Was it split wrong?"));
|
|
exit(128);
|
|
}
|
|
|
|
strbuf_addstr(&msg, "\n\n");
|
|
if (strbuf_read_file(&msg, am_path(state, "msg"), 0) < 0)
|
|
die_errno(_("could not read '%s'"), am_path(state, "msg"));
|
|
stripspace(&msg, 0);
|
|
|
|
assert(!state->author_name);
|
|
state->author_name = strbuf_detach(&author_name, NULL);
|
|
|
|
assert(!state->author_email);
|
|
state->author_email = strbuf_detach(&author_email, NULL);
|
|
|
|
assert(!state->author_date);
|
|
state->author_date = strbuf_detach(&author_date, NULL);
|
|
|
|
assert(!state->msg);
|
|
state->msg = strbuf_detach(&msg, &state->msg_len);
|
|
|
|
finish:
|
|
strbuf_release(&msg);
|
|
strbuf_release(&author_date);
|
|
strbuf_release(&author_email);
|
|
strbuf_release(&author_name);
|
|
strbuf_release(&sb);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Applies current patch with git-apply. Returns 0 on success, -1 otherwise.
|
|
*/
|
|
static int run_apply(const struct am_state *state)
|
|
{
|
|
struct child_process cp = CHILD_PROCESS_INIT;
|
|
|
|
cp.git_cmd = 1;
|
|
|
|
argv_array_push(&cp.args, "apply");
|
|
argv_array_push(&cp.args, "--index");
|
|
argv_array_push(&cp.args, am_path(state, "patch"));
|
|
|
|
if (run_command(&cp))
|
|
return -1;
|
|
|
|
/* Reload index as git-apply will have modified it. */
|
|
discard_cache();
|
|
read_cache();
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Commits the current index with state->msg as the commit message and
|
|
* state->author_name, state->author_email and state->author_date as the author
|
|
* information.
|
|
*/
|
|
static void do_commit(const struct am_state *state)
|
|
{
|
|
unsigned char tree[GIT_SHA1_RAWSZ], parent[GIT_SHA1_RAWSZ],
|
|
commit[GIT_SHA1_RAWSZ];
|
|
unsigned char *ptr;
|
|
struct commit_list *parents = NULL;
|
|
const char *reflog_msg, *author;
|
|
struct strbuf sb = STRBUF_INIT;
|
|
|
|
if (write_cache_as_tree(tree, 0, NULL))
|
|
die(_("git write-tree failed to write a tree"));
|
|
|
|
if (!get_sha1_commit("HEAD", parent)) {
|
|
ptr = parent;
|
|
commit_list_insert(lookup_commit(parent), &parents);
|
|
} else {
|
|
ptr = NULL;
|
|
fprintf_ln(stderr, _("applying to an empty history"));
|
|
}
|
|
|
|
author = fmt_ident(state->author_name, state->author_email,
|
|
state->author_date, IDENT_STRICT);
|
|
|
|
if (commit_tree(state->msg, state->msg_len, tree, parents, commit,
|
|
author, NULL))
|
|
die(_("failed to write commit object"));
|
|
|
|
reflog_msg = getenv("GIT_REFLOG_ACTION");
|
|
if (!reflog_msg)
|
|
reflog_msg = "am";
|
|
|
|
strbuf_addf(&sb, "%s: %.*s", reflog_msg, linelen(state->msg),
|
|
state->msg);
|
|
|
|
update_ref(sb.buf, "HEAD", commit, ptr, 0, UPDATE_REFS_DIE_ON_ERR);
|
|
|
|
strbuf_release(&sb);
|
|
}
|
|
|
|
/**
|
|
* Validates the am_state for resuming -- the "msg" and authorship fields must
|
|
* be filled up.
|
|
*/
|
|
static void validate_resume_state(const struct am_state *state)
|
|
{
|
|
if (!state->msg)
|
|
die(_("cannot resume: %s does not exist."),
|
|
am_path(state, "final-commit"));
|
|
|
|
if (!state->author_name || !state->author_email || !state->author_date)
|
|
die(_("cannot resume: %s does not exist."),
|
|
am_path(state, "author-script"));
|
|
}
|
|
|
|
/**
|
|
* Applies all queued mail.
|
|
*
|
|
* If `resume` is true, we are "resuming". The "msg" and authorship fields, as
|
|
* well as the state directory's "patch" file is used as-is for applying the
|
|
* patch and committing it.
|
|
*/
|
|
static void am_run(struct am_state *state, int resume)
|
|
{
|
|
const char *argv_gc_auto[] = {"gc", "--auto", NULL};
|
|
struct strbuf sb = STRBUF_INIT;
|
|
|
|
refresh_and_write_cache();
|
|
|
|
if (index_has_changes(&sb))
|
|
die(_("Dirty index: cannot apply patches (dirty: %s)"), sb.buf);
|
|
|
|
strbuf_release(&sb);
|
|
|
|
while (state->cur <= state->last) {
|
|
const char *mail = am_path(state, msgnum(state));
|
|
|
|
if (!file_exists(mail))
|
|
goto next;
|
|
|
|
if (resume) {
|
|
validate_resume_state(state);
|
|
resume = 0;
|
|
} else {
|
|
if (parse_mail(state, mail))
|
|
goto next; /* mail should be skipped */
|
|
|
|
write_author_script(state);
|
|
write_commit_msg(state);
|
|
}
|
|
|
|
printf_ln(_("Applying: %.*s"), linelen(state->msg), state->msg);
|
|
|
|
if (run_apply(state) < 0) {
|
|
int advice_amworkdir = 1;
|
|
|
|
printf_ln(_("Patch failed at %s %.*s"), msgnum(state),
|
|
linelen(state->msg), state->msg);
|
|
|
|
git_config_get_bool("advice.amworkdir", &advice_amworkdir);
|
|
|
|
if (advice_amworkdir)
|
|
printf_ln(_("The copy of the patch that failed is found in: %s"),
|
|
am_path(state, "patch"));
|
|
|
|
exit(128);
|
|
}
|
|
|
|
do_commit(state);
|
|
|
|
next:
|
|
am_next(state);
|
|
}
|
|
|
|
am_destroy(state);
|
|
run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
|
|
}
|
|
|
|
/**
|
|
* Resume the current am session after patch application failure. The user did
|
|
* all the hard work, and we do not have to do any patch application. Just
|
|
* trust and commit what the user has in the index and working tree.
|
|
*/
|
|
static void am_resolve(struct am_state *state)
|
|
{
|
|
validate_resume_state(state);
|
|
|
|
printf_ln(_("Applying: %.*s"), linelen(state->msg), state->msg);
|
|
|
|
if (!index_has_changes(NULL)) {
|
|
printf_ln(_("No changes - did you forget to use 'git add'?\n"
|
|
"If there is nothing left to stage, chances are that something else\n"
|
|
"already introduced the same changes; you might want to skip this patch."));
|
|
exit(128);
|
|
}
|
|
|
|
if (unmerged_cache()) {
|
|
printf_ln(_("You still have unmerged paths in your index.\n"
|
|
"Did you forget to use 'git add'?"));
|
|
exit(128);
|
|
}
|
|
|
|
do_commit(state);
|
|
|
|
am_next(state);
|
|
am_run(state, 0);
|
|
}
|
|
|
|
/**
|
|
* parse_options() callback that validates and sets opt->value to the
|
|
* PATCH_FORMAT_* enum value corresponding to `arg`.
|
|
*/
|
|
static int parse_opt_patchformat(const struct option *opt, const char *arg, int unset)
|
|
{
|
|
int *opt_value = opt->value;
|
|
|
|
if (!strcmp(arg, "mbox"))
|
|
*opt_value = PATCH_FORMAT_MBOX;
|
|
else
|
|
return error(_("Invalid value for --patch-format: %s"), arg);
|
|
return 0;
|
|
}
|
|
|
|
enum resume_mode {
|
|
RESUME_FALSE = 0,
|
|
RESUME_APPLY,
|
|
RESUME_RESOLVED
|
|
};
|
|
|
|
int cmd_am(int argc, const char **argv, const char *prefix)
|
|
{
|
|
struct am_state state;
|
|
int patch_format = PATCH_FORMAT_UNKNOWN;
|
|
enum resume_mode resume = RESUME_FALSE;
|
|
|
|
const char * const usage[] = {
|
|
N_("git am [options] [(<mbox>|<Maildir>)...]"),
|
|
N_("git am [options] --continue"),
|
|
NULL
|
|
};
|
|
|
|
struct option options[] = {
|
|
OPT_CALLBACK(0, "patch-format", &patch_format, N_("format"),
|
|
N_("format the patch(es) are in"),
|
|
parse_opt_patchformat),
|
|
OPT_CMDMODE(0, "continue", &resume,
|
|
N_("continue applying patches after resolving a conflict"),
|
|
RESUME_RESOLVED),
|
|
OPT_CMDMODE('r', "resolved", &resume,
|
|
N_("synonyms for --continue"),
|
|
RESUME_RESOLVED),
|
|
OPT_END()
|
|
};
|
|
|
|
/*
|
|
* NEEDSWORK: Once all the features of git-am.sh have been
|
|
* re-implemented in builtin/am.c, this preamble can be removed.
|
|
*/
|
|
if (!getenv("_GIT_USE_BUILTIN_AM")) {
|
|
const char *path = mkpath("%s/git-am", git_exec_path());
|
|
|
|
if (sane_execvp(path, (char **)argv) < 0)
|
|
die_errno("could not exec %s", path);
|
|
} else {
|
|
prefix = setup_git_directory();
|
|
trace_repo_setup(prefix);
|
|
setup_work_tree();
|
|
}
|
|
|
|
git_config(git_default_config, NULL);
|
|
|
|
am_state_init(&state, git_path("rebase-apply"));
|
|
|
|
argc = parse_options(argc, argv, prefix, options, usage, 0);
|
|
|
|
if (read_index_preload(&the_index, NULL) < 0)
|
|
die(_("failed to read the index"));
|
|
|
|
if (am_in_progress(&state)) {
|
|
if (resume == RESUME_FALSE)
|
|
resume = RESUME_APPLY;
|
|
|
|
am_load(&state);
|
|
} else {
|
|
struct argv_array paths = ARGV_ARRAY_INIT;
|
|
int i;
|
|
|
|
if (resume)
|
|
die(_("Resolve operation not in progress, we are not resuming."));
|
|
|
|
for (i = 0; i < argc; i++) {
|
|
if (is_absolute_path(argv[i]) || !prefix)
|
|
argv_array_push(&paths, argv[i]);
|
|
else
|
|
argv_array_push(&paths, mkpath("%s/%s", prefix, argv[i]));
|
|
}
|
|
|
|
am_setup(&state, patch_format, paths.argv);
|
|
|
|
argv_array_clear(&paths);
|
|
}
|
|
|
|
switch (resume) {
|
|
case RESUME_FALSE:
|
|
am_run(&state, 0);
|
|
break;
|
|
case RESUME_APPLY:
|
|
am_run(&state, 1);
|
|
break;
|
|
case RESUME_RESOLVED:
|
|
am_resolve(&state);
|
|
break;
|
|
default:
|
|
die("BUG: invalid resume value");
|
|
}
|
|
|
|
am_state_release(&state);
|
|
|
|
return 0;
|
|
}
|