diff options
| -rw-r--r-- | Makefile | 11 | ||||
| -rw-r--r-- | builtin-revert.c | 406 | ||||
| -rw-r--r-- | builtin.h | 2 | ||||
| -rwxr-xr-x | git-revert.sh | 197 | ||||
| -rw-r--r-- | git.c | 2 |
5 files changed, 414 insertions, 204 deletions
@@ -180,7 +180,7 @@ SCRIPT_SH = \ git-merge-one-file.sh git-parse-remote.sh \ git-pull.sh git-rebase.sh \ git-repack.sh git-request-pull.sh git-reset.sh \ - git-revert.sh git-sh-setup.sh \ + git-sh-setup.sh \ git-tag.sh git-verify-tag.sh \ git-applymbox.sh git-applypatch.sh git-am.sh \ git-merge.sh git-merge-stupid.sh git-merge-octopus.sh \ @@ -196,7 +196,7 @@ SCRIPT_PERL = \ SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH)) \ $(patsubst %.perl,%,$(SCRIPT_PERL)) \ - git-cherry-pick git-status git-instaweb + git-status git-instaweb # ... and all the rest that could be moved out of bindir to gitexecdir PROGRAMS = \ @@ -223,7 +223,7 @@ EXTRA_PROGRAMS = BUILT_INS = \ git-format-patch$X git-show$X git-whatchanged$X git-cherry$X \ git-get-tar-commit-id$X git-init$X git-repo-config$X \ - git-fsck-objects$X \ + git-fsck-objects$X git-cherry-pick$X \ $(patsubst builtin-%.o,git-%$X,$(BUILTIN_OBJS)) # what 'all' will build and 'install' will install, in gitexecdir @@ -315,6 +315,7 @@ BUILTIN_OBJS = \ builtin-rerere.o \ builtin-rev-list.o \ builtin-rev-parse.o \ + builtin-revert.o \ builtin-rm.o \ builtin-runstatus.o \ builtin-shortlog.o \ @@ -689,10 +690,6 @@ $(patsubst %.perl,%,$(SCRIPT_PERL)): % : %.perl chmod +x $@+ mv $@+ $@ -git-cherry-pick: git-revert - cp $< $@+ - mv $@+ $@ - git-status: git-commit cp $< $@+ mv $@+ $@ diff --git a/builtin-revert.c b/builtin-revert.c new file mode 100644 index 000000000..bc3cfcba0 --- /dev/null +++ b/builtin-revert.c @@ -0,0 +1,406 @@ +#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); +} @@ -24,6 +24,7 @@ extern int cmd_cat_file(int argc, const char **argv, const char *prefix); extern int cmd_checkout_index(int argc, const char **argv, const char *prefix); extern int cmd_check_ref_format(int argc, const char **argv, const char *prefix); extern int cmd_cherry(int argc, const char **argv, const char *prefix); +extern int cmd_cherry_pick(int argc, const char **argv, const char *prefix); extern int cmd_commit_tree(int argc, const char **argv, const char *prefix); extern int cmd_count_objects(int argc, const char **argv, const char *prefix); extern int cmd_describe(int argc, const char **argv, const char *prefix); @@ -60,6 +61,7 @@ extern int cmd_config(int argc, const char **argv, const char *prefix); extern int cmd_rerere(int argc, const char **argv, const char *prefix); extern int cmd_rev_list(int argc, const char **argv, const char *prefix); extern int cmd_rev_parse(int argc, const char **argv, const char *prefix); +extern int cmd_revert(int argc, const char **argv, const char *prefix); extern int cmd_rm(int argc, const char **argv, const char *prefix); extern int cmd_runstatus(int argc, const char **argv, const char *prefix); extern int cmd_shortlog(int argc, const char **argv, const char *prefix); diff --git a/git-revert.sh b/git-revert.sh deleted file mode 100755 index 49f00321b..000000000 --- a/git-revert.sh +++ /dev/null @@ -1,197 +0,0 @@ -#!/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 @@ -234,6 +234,7 @@ static void handle_internal_command(int argc, const char **argv, char **envp) { "checkout-index", cmd_checkout_index, RUN_SETUP }, { "check-ref-format", cmd_check_ref_format }, { "cherry", cmd_cherry, RUN_SETUP }, + { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NOT_BARE }, { "commit-tree", cmd_commit_tree, RUN_SETUP }, { "config", cmd_config }, { "count-objects", cmd_count_objects, RUN_SETUP }, @@ -272,6 +273,7 @@ static void handle_internal_command(int argc, const char **argv, char **envp) { "rerere", cmd_rerere, RUN_SETUP }, { "rev-list", cmd_rev_list, RUN_SETUP }, { "rev-parse", cmd_rev_parse, RUN_SETUP }, + { "revert", cmd_revert, RUN_SETUP | NOT_BARE }, { "rm", cmd_rm, RUN_SETUP | NOT_BARE }, { "runstatus", cmd_runstatus, RUN_SETUP | NOT_BARE }, { "shortlog", cmd_shortlog, RUN_SETUP | USE_PAGER }, |