--- /dev/null
+#include "cache.h"
+#include "builtin.h"
+#include "object.h"
+#include "commit.h"
+#include "tag.h"
+#include "wt-status.h"
+#include "run-command.h"
+#include "exec_cmd.h"
+#include "utf8.h"
+
+/*
+ * This implements the builtins revert and cherry-pick.
+ *
+ * Copyright (c) 2007 Johannes E. Schindelin
+ *
+ * Based on git-revert.sh, which is
+ *
+ * Copyright (c) 2005 Linus Torvalds
+ * Copyright (c) 2005 Junio C Hamano
+ */
+
+static const char *revert_usage = "git-revert [--edit | --no-edit] [-n] <commit-ish>";
+
+static const char *cherry_pick_usage = "git-cherry-pick [--edit] [-n] [-r] [-x] <commit-ish>";
+
+static int edit;
+static int replay;
+enum { REVERT, CHERRY_PICK } action;
+static int no_commit;
+static struct commit *commit;
+static int needed_deref;
+
+static const char *me;
+
+#define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
+
+static void parse_options(int argc, const char **argv)
+{
+ const char *usage_str = action == REVERT ?
+ revert_usage : cherry_pick_usage;
+ unsigned char sha1[20];
+ const char *arg;
+ int i;
+
+ if (argc < 2)
+ usage(usage_str);
+
+ for (i = 1; i < argc - 1; i++) {
+ arg = argv[i];
+ if (!strcmp(arg, "-n") || !strcmp(arg, "--no-commit"))
+ no_commit = 1;
+ else if (!strcmp(arg, "-e") || !strcmp(arg, "--edit"))
+ edit = 1;
+ else if (!strcmp(arg, "--no-edit"))
+ edit = 0;
+ else if (!strcmp(arg, "-x") || !strcmp(arg, "--i-really-want-"
+ "to-expose-my-private-commit-object-name"))
+ replay = 0;
+ else if (strcmp(arg, "-r"))
+ usage(usage_str);
+ }
+
+ arg = argv[argc - 1];
+ if (get_sha1(arg, sha1))
+ die ("Cannot find '%s'", arg);
+ commit = (struct commit *)parse_object(sha1);
+ if (!commit)
+ die ("Could not find %s", sha1_to_hex(sha1));
+ if (commit->object.type == OBJ_TAG) {
+ commit = (struct commit *)
+ deref_tag((struct object *)commit, arg, strlen(arg));
+ needed_deref = 1;
+ }
+ if (commit->object.type != OBJ_COMMIT)
+ die ("'%s' does not point to a commit", arg);
+}
+
+static char *get_oneline(const char *message)
+{
+ char *result;
+ const char *p = message, *abbrev, *eol;
+ int abbrev_len, oneline_len;
+
+ if (!p)
+ die ("Could not read commit message of %s",
+ sha1_to_hex(commit->object.sha1));
+ while (*p && (*p != '\n' || p[1] != '\n'))
+ p++;
+
+ if (*p) {
+ p += 2;
+ for (eol = p + 1; *eol && *eol != '\n'; eol++)
+ ; /* do nothing */
+ } else
+ eol = p;
+ abbrev = find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV);
+ abbrev_len = strlen(abbrev);
+ oneline_len = eol - p;
+ result = xmalloc(abbrev_len + 5 + oneline_len);
+ memcpy(result, abbrev, abbrev_len);
+ memcpy(result + abbrev_len, "... ", 4);
+ memcpy(result + abbrev_len + 4, p, oneline_len);
+ result[abbrev_len + 4 + oneline_len] = '\0';
+ return result;
+}
+
+char *get_encoding(const char *message)
+{
+ const char *p = message, *eol;
+
+ if (!p)
+ die ("Could not read commit message of %s",
+ sha1_to_hex(commit->object.sha1));
+ while (*p && *p != '\n') {
+ for (eol = p + 1; *eol && *eol != '\n'; eol++)
+ ; /* do nothing */
+ if (!prefixcmp(p, "encoding ")) {
+ char *result = xmalloc(eol - 8 - p);
+ strlcpy(result, p + 9, eol - 8 - p);
+ return result;
+ }
+ p = eol;
+ if (*p == '\n')
+ p++;
+ }
+ return NULL;
+}
+
+struct lock_file msg_file;
+static int msg_fd;
+
+static void add_to_msg(const char *string)
+{
+ int len = strlen(string);
+ if (write_in_full(msg_fd, string, len) < 0)
+ die ("Could not write to .msg");
+}
+
+static void add_message_to_msg(const char *message)
+{
+ const char *p = message;
+ while (*p && (*p != '\n' || p[1] != '\n'))
+ p++;
+
+ if (!*p)
+ add_to_msg(sha1_to_hex(commit->object.sha1));
+
+ p += 2;
+ add_to_msg(p);
+ return;
+}
+
+static void set_author_ident_env(const char *message)
+{
+ const char *p = message;
+ if (!p)
+ die ("Could not read commit message of %s",
+ sha1_to_hex(commit->object.sha1));
+ while (*p && *p != '\n') {
+ const char *eol;
+
+ for (eol = p; *eol && *eol != '\n'; eol++)
+ ; /* do nothing */
+ if (!prefixcmp(p, "author ")) {
+ char *line, *pend, *email, *timestamp;
+
+ p += 7;
+ line = xmalloc(eol + 1 - p);
+ memcpy(line, p, eol - p);
+ line[eol - p] = '\0';
+ email = strchr(line, '<');
+ if (!email)
+ die ("Could not extract author email from %s",
+ sha1_to_hex(commit->object.sha1));
+ if (email == line)
+ pend = line;
+ else
+ for (pend = email; pend != line + 1 &&
+ isspace(pend[-1]); pend--);
+ ; /* do nothing */
+ *pend = '\0';
+ email++;
+ timestamp = strchr(email, '>');
+ if (!timestamp)
+ die ("Could not extract author email from %s",
+ sha1_to_hex(commit->object.sha1));
+ *timestamp = '\0';
+ for (timestamp++; *timestamp && isspace(*timestamp);
+ timestamp++)
+ ; /* do nothing */
+ setenv("GIT_AUTHOR_NAME", line, 1);
+ setenv("GIT_AUTHOR_EMAIL", email, 1);
+ setenv("GIT_AUTHOR_DATE", timestamp, 1);
+ free(line);
+ return;
+ }
+ p = eol;
+ if (*p == '\n')
+ p++;
+ }
+ die ("No author information found in %s",
+ sha1_to_hex(commit->object.sha1));
+}
+
+static int merge_recursive(const char *base_sha1,
+ const char *head_sha1, const char *head_name,
+ const char *next_sha1, const char *next_name)
+{
+ char buffer[256];
+
+ sprintf(buffer, "GITHEAD_%s", head_sha1);
+ setenv(buffer, head_name, 1);
+ sprintf(buffer, "GITHEAD_%s", next_sha1);
+ setenv(buffer, next_name, 1);
+
+ /*
+ * This three way merge is an interesting one. We are at
+ * $head, and would want to apply the change between $commit
+ * and $prev on top of us (when reverting), or the change between
+ * $prev and $commit on top of us (when cherry-picking or replaying).
+ */
+
+ return run_command_opt(RUN_COMMAND_NO_STDIN | RUN_GIT_CMD,
+ "merge-recursive", base_sha1, "--",
+ head_sha1, next_sha1, NULL);
+}
+
+static int revert_or_cherry_pick(int argc, const char **argv)
+{
+ unsigned char head[20];
+ struct commit *base, *next;
+ int i;
+ char *oneline, *encoding, *reencoded_message = NULL;
+ const char *message;
+
+ git_config(git_default_config);
+ me = action == REVERT ? "revert" : "cherry-pick";
+ setenv(GIT_REFLOG_ACTION, me, 0);
+ parse_options(argc, argv);
+
+ /* this is copied from the shell script, but it's never triggered... */
+ if (action == REVERT && replay)
+ die("revert is incompatible with replay");
+
+ if (no_commit) {
+ /*
+ * We do not intend to commit immediately. We just want to
+ * merge the differences in.
+ */
+ if (write_tree(head, 0, NULL))
+ die ("Your index file is unmerged.");
+ } else {
+ struct wt_status s;
+
+ if (get_sha1("HEAD", head))
+ die ("You do not have a valid HEAD");
+ wt_status_prepare(&s);
+ if (s.commitable || s.workdir_dirty)
+ die ("Dirty index: cannot %s", me);
+ discard_cache();
+ }
+
+ if (!commit->parents)
+ die ("Cannot %s a root commit", me);
+ if (commit->parents->next)
+ die ("Cannot %s a multi-parent commit.", me);
+ if (!(message = commit->buffer))
+ die ("Cannot get commit message for %s",
+ sha1_to_hex(commit->object.sha1));
+
+ /*
+ * "commit" is an existing commit. We would want to apply
+ * the difference it introduces since its first parent "prev"
+ * on top of the current HEAD if we are cherry-pick. Or the
+ * reverse of it if we are revert.
+ */
+
+ msg_fd = hold_lock_file_for_update(&msg_file, ".msg", 1);
+
+ encoding = get_encoding(message);
+ if (!encoding)
+ encoding = "utf-8";
+ if (!git_commit_encoding)
+ git_commit_encoding = "utf-8";
+ if ((reencoded_message = reencode_string(message,
+ git_commit_encoding, encoding)))
+ message = reencoded_message;
+
+ oneline = get_oneline(message);
+
+ if (action == REVERT) {
+ base = commit;
+ next = commit->parents->item;
+ add_to_msg("Revert ");
+ add_to_msg(find_unique_abbrev(commit->object.sha1,
+ DEFAULT_ABBREV));
+ add_to_msg(oneline);
+ add_to_msg("\nThis reverts commit ");
+ add_to_msg(sha1_to_hex(commit->object.sha1));
+ add_to_msg(".\n");
+ } else {
+ base = commit->parents->item;
+ next = commit;
+ set_author_ident_env(message);
+ add_message_to_msg(message);
+ if (replay) {
+ add_to_msg("\n(cherry picked from commit ");
+ add_to_msg(sha1_to_hex(commit->object.sha1));
+ add_to_msg(")\n");
+ }
+ }
+ if (needed_deref) {
+ add_to_msg("(original 'git ");
+ add_to_msg(me);
+ add_to_msg("' arguments: ");
+ for (i = 0; i < argc; i++) {
+ if (i)
+ add_to_msg(" ");
+ add_to_msg(argv[i]);
+ }
+ add_to_msg(")\n");
+ }
+
+ if (merge_recursive(sha1_to_hex(base->object.sha1),
+ sha1_to_hex(head), "HEAD",
+ sha1_to_hex(next->object.sha1), oneline))
+ exit(1);
+ if (write_tree(head, 0, NULL)) {
+ const char *target = git_path("MERGE_MSG");
+ add_to_msg("\nConflicts:\n\n");
+ read_cache();
+ for (i = 0; i < active_nr;) {
+ struct cache_entry *ce = active_cache[i++];
+ if (ce_stage(ce)) {
+ add_to_msg("\t");
+ add_to_msg(ce->name);
+ add_to_msg("\n");
+ while (i < active_nr && !strcmp(ce->name,
+ active_cache[i]->name))
+ i++;
+ }
+ }
+ if (close(msg_fd) || commit_lock_file(&msg_file) < 0)
+ die ("Error wrapping up .msg");
+ unlink(target);
+ if (rename(".msg", target))
+ die ("Could not move .msg to %s", target);
+ fprintf(stderr, "Automatic %s failed. "
+ "After resolving the conflicts,\n"
+ "mark the corrected paths with 'git-add <paths>'\n"
+ "and commit the result.\n", me);
+ if (action == CHERRY_PICK) {
+ fprintf(stderr, "You may choose to use the following "
+ "when making the commit:\n"
+ "GIT_AUTHOR_NAME=\"%s\"\n",
+ getenv("GIT_AUTHOR_NAME"));
+ fprintf(stderr, "GIT_AUTHOR_EMAIL=\"%s\"\n",
+ getenv("GIT_AUTHOR_EMAIL"));
+ fprintf(stderr, "GIT_AUTHOR_DATE=\"%s\"\n"
+ "export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL "
+ "GIT_AUTHOR_DATE\n",
+ getenv("GIT_AUTHOR_DATE"));
+ }
+ exit(1);
+ }
+ if (close(msg_fd) || commit_lock_file(&msg_file) < 0)
+ die ("Error wrapping up .msg");
+ fprintf(stderr, "Finished one %s.\n", me);
+
+ /*
+ *
+ * If we are cherry-pick, and if the merge did not result in
+ * hand-editing, we will hit this commit and inherit the original
+ * author date and name.
+ * If we are revert, or if our cherry-pick results in a hand merge,
+ * we had better say that the current user is responsible for that.
+ */
+
+ if (!no_commit) {
+ if (edit)
+ return execl_git_cmd("commit", "-n", "-F", ".msg",
+ "-e", NULL);
+ else
+ return execl_git_cmd("commit", "-n", "-F", ".msg",
+ NULL);
+ }
+ if (reencoded_message)
+ free(reencoded_message);
+
+ return 0;
+}
+
+int cmd_revert(int argc, const char **argv, const char *prefix)
+{
+ if (isatty(0))
+ edit = 1;
+ action = REVERT;
+ return revert_or_cherry_pick(argc, argv);
+}
+
+int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
+{
+ replay = 1;
+ action = CHERRY_PICK;
+ return revert_or_cherry_pick(argc, argv);
+}
+++ /dev/null
-#!/bin/sh
-#
-# Copyright (c) 2005 Linus Torvalds
-# Copyright (c) 2005 Junio C Hamano
-#
-
-case "$0" in
-*-revert* )
- test -t 0 && edit=-e
- replay=
- me=revert
- USAGE='[--edit | --no-edit] [-n] <commit-ish>' ;;
-*-cherry-pick* )
- replay=t
- edit=
- me=cherry-pick
- USAGE='[--edit] [-n] [-r] [-x] <commit-ish>' ;;
-* )
- echo >&2 "What are you talking about?"
- exit 1 ;;
-esac
-
-SUBDIRECTORY_OK=Yes ;# we will cd up
-. git-sh-setup
-require_work_tree
-cd_to_toplevel
-
-no_commit=
-while case "$#" in 0) break ;; esac
-do
- case "$1" in
- -n|--n|--no|--no-|--no-c|--no-co|--no-com|--no-comm|\
- --no-commi|--no-commit)
- no_commit=t
- ;;
- -e|--e|--ed|--edi|--edit)
- edit=-e
- ;;
- --n|--no|--no-|--no-e|--no-ed|--no-edi|--no-edit)
- edit=
- ;;
- -r)
- : no-op ;;
- -x|--i-really-want-to-expose-my-private-commit-object-name)
- replay=
- ;;
- -*)
- usage
- ;;
- *)
- break
- ;;
- esac
- shift
-done
-
-set_reflog_action "$me"
-
-test "$me,$replay" = "revert,t" && usage
-
-case "$no_commit" in
-t)
- # We do not intend to commit immediately. We just want to
- # merge the differences in.
- head=$(git-write-tree) ||
- die "Your index file is unmerged."
- ;;
-*)
- head=$(git-rev-parse --verify HEAD) ||
- die "You do not have a valid HEAD"
- files=$(git-diff-index --cached --name-only $head) || exit
- if [ "$files" ]; then
- die "Dirty index: cannot $me (dirty: $files)"
- fi
- ;;
-esac
-
-rev=$(git-rev-parse --verify "$@") &&
-commit=$(git-rev-parse --verify "$rev^0") ||
- die "Not a single commit $@"
-prev=$(git-rev-parse --verify "$commit^1" 2>/dev/null) ||
- die "Cannot run $me a root commit"
-git-rev-parse --verify "$commit^2" >/dev/null 2>&1 &&
- die "Cannot run $me a multi-parent commit."
-
-encoding=$(git config i18n.commitencoding || echo UTF-8)
-
-# "commit" is an existing commit. We would want to apply
-# the difference it introduces since its first parent "prev"
-# on top of the current HEAD if we are cherry-pick. Or the
-# reverse of it if we are revert.
-
-case "$me" in
-revert)
- git show -s --pretty=oneline --encoding="$encoding" $commit |
- sed -e '
- s/^[^ ]* /Revert "/
- s/$/"/
- '
- echo
- echo "This reverts commit $commit."
- test "$rev" = "$commit" ||
- echo "(original 'git revert' arguments: $@)"
- base=$commit next=$prev
- ;;
-
-cherry-pick)
- pick_author_script='
- /^author /{
- s/'\''/'\''\\'\'\''/g
- h
- s/^author \([^<]*\) <[^>]*> .*$/\1/
- s/'\''/'\''\'\'\''/g
- s/.*/GIT_AUTHOR_NAME='\''&'\''/p
-
- g
- s/^author [^<]* <\([^>]*\)> .*$/\1/
- s/'\''/'\''\'\'\''/g
- s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
-
- g
- s/^author [^<]* <[^>]*> \(.*\)$/\1/
- s/'\''/'\''\'\'\''/g
- s/.*/GIT_AUTHOR_DATE='\''&'\''/p
-
- q
- }'
-
- logmsg=`git show -s --pretty=raw --encoding="$encoding" "$commit"`
- set_author_env=`echo "$logmsg" |
- LANG=C LC_ALL=C sed -ne "$pick_author_script"`
- eval "$set_author_env"
- export GIT_AUTHOR_NAME
- export GIT_AUTHOR_EMAIL
- export GIT_AUTHOR_DATE
-
- echo "$logmsg" |
- sed -e '1,/^$/d' -e 's/^ //'
- case "$replay" in
- '')
- echo "(cherry picked from commit $commit)"
- test "$rev" = "$commit" ||
- echo "(original 'git cherry-pick' arguments: $@)"
- ;;
- esac
- base=$prev next=$commit
- ;;
-
-esac >.msg
-
-eval GITHEAD_$head=HEAD
-eval GITHEAD_$next='`git show -s \
- --pretty=oneline --encoding="$encoding" "$commit" |
- sed -e "s/^[^ ]* //"`'
-export GITHEAD_$head GITHEAD_$next
-
-# This three way merge is an interesting one. We are at
-# $head, and would want to apply the change between $commit
-# and $prev on top of us (when reverting), or the change between
-# $prev and $commit on top of us (when cherry-picking or replaying).
-
-git-merge-recursive $base -- $head $next &&
-result=$(git-write-tree 2>/dev/null) || {
- mv -f .msg "$GIT_DIR/MERGE_MSG"
- {
- echo '
-Conflicts:
-'
- git ls-files --unmerged |
- sed -e 's/^[^ ]* / /' |
- uniq
- } >>"$GIT_DIR/MERGE_MSG"
- echo >&2 "Automatic $me failed. After resolving the conflicts,"
- echo >&2 "mark the corrected paths with 'git-add <paths>'"
- echo >&2 "and commit the result."
- case "$me" in
- cherry-pick)
- echo >&2 "You may choose to use the following when making"
- echo >&2 "the commit:"
- echo >&2 "$set_author_env"
- esac
- exit 1
-}
-echo >&2 "Finished one $me."
-
-# If we are cherry-pick, and if the merge did not result in
-# hand-editing, we will hit this commit and inherit the original
-# author date and name.
-# If we are revert, or if our cherry-pick results in a hand merge,
-# we had better say that the current user is responsible for that.
-
-case "$no_commit" in
-'')
- git-commit -n -F .msg $edit
- rm -f .msg
- ;;
-esac
projects / ~andy / git / commitdiff