X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=builtin-checkout.c;h=06904c3bd3595b4c8cbc6c66d3a1b9c364381bd6;hb=4deca329f5da1552c8d087975dd5107519cabef7;hp=1deda927cdfcbcdcb751aca3338ac77ef0aad836;hpb=581000a4196d196d221bb6164a49a8a52ce30730;p=git.git diff --git a/builtin-checkout.c b/builtin-checkout.c index 1deda927c..06904c3bd 100644 --- a/builtin-checkout.c +++ b/builtin-checkout.c @@ -13,6 +13,9 @@ #include "diff.h" #include "revision.h" #include "remote.h" +#include "blob.h" +#include "xdiff-interface.h" +#include "ll-merge.h" static const char * const checkout_usage[] = { "git checkout [options] ", @@ -20,6 +23,18 @@ static const char * const checkout_usage[] = { NULL, }; +struct checkout_opts { + int quiet; + int merge; + int force; + int writeout_stage; + int writeout_error; + + const char *new_branch; + int new_branch_log; + enum branch_track track; +}; + static int post_checkout_hook(struct commit *old, struct commit *new, int changed) { @@ -32,7 +47,7 @@ static int post_checkout_hook(struct commit *old, struct commit *new, memset(&proc, 0, sizeof(proc)); argv[0] = name; - argv[1] = xstrdup(sha1_to_hex(old->object.sha1)); + argv[1] = xstrdup(sha1_to_hex(old ? old->object.sha1 : null_sha1)); argv[2] = xstrdup(sha1_to_hex(new->object.sha1)); argv[3] = changed ? "1" : "0"; argv[4] = NULL; @@ -84,8 +99,121 @@ static int skip_same_name(struct cache_entry *ce, int pos) return pos; } +static int check_stage(int stage, struct cache_entry *ce, int pos) +{ + while (pos < active_nr && + !strcmp(active_cache[pos]->name, ce->name)) { + if (ce_stage(active_cache[pos]) == stage) + return 0; + pos++; + } + return error("path '%s' does not have %s version", + ce->name, + (stage == 2) ? "our" : "their"); +} + +static int check_all_stages(struct cache_entry *ce, int pos) +{ + if (ce_stage(ce) != 1 || + active_nr <= pos + 2 || + strcmp(active_cache[pos+1]->name, ce->name) || + ce_stage(active_cache[pos+1]) != 2 || + strcmp(active_cache[pos+2]->name, ce->name) || + ce_stage(active_cache[pos+2]) != 3) + return error("path '%s' does not have all three versions", + ce->name); + return 0; +} + +static int checkout_stage(int stage, struct cache_entry *ce, int pos, + struct checkout *state) +{ + while (pos < active_nr && + !strcmp(active_cache[pos]->name, ce->name)) { + if (ce_stage(active_cache[pos]) == stage) + return checkout_entry(active_cache[pos], state, NULL); + pos++; + } + return error("path '%s' does not have %s version", + ce->name, + (stage == 2) ? "our" : "their"); +} + +/* NEEDSWORK: share with merge-recursive */ +static void fill_mm(const unsigned char *sha1, mmfile_t *mm) +{ + unsigned long size; + enum object_type type; + + if (!hashcmp(sha1, null_sha1)) { + mm->ptr = xstrdup(""); + mm->size = 0; + return; + } + + mm->ptr = read_sha1_file(sha1, &type, &size); + if (!mm->ptr || type != OBJ_BLOB) + die("unable to read blob object %s", sha1_to_hex(sha1)); + mm->size = size; +} + +static int checkout_merged(int pos, struct checkout *state) +{ + struct cache_entry *ce = active_cache[pos]; + const char *path = ce->name; + mmfile_t ancestor, ours, theirs; + int status; + unsigned char sha1[20]; + mmbuffer_t result_buf; + + if (ce_stage(ce) != 1 || + active_nr <= pos + 2 || + strcmp(active_cache[pos+1]->name, path) || + ce_stage(active_cache[pos+1]) != 2 || + strcmp(active_cache[pos+2]->name, path) || + ce_stage(active_cache[pos+2]) != 3) + return error("path '%s' does not have all 3 versions", path); + + fill_mm(active_cache[pos]->sha1, &ancestor); + fill_mm(active_cache[pos+1]->sha1, &ours); + fill_mm(active_cache[pos+2]->sha1, &theirs); + + status = ll_merge(&result_buf, path, &ancestor, + &ours, "ours", &theirs, "theirs", 1); + free(ancestor.ptr); + free(ours.ptr); + free(theirs.ptr); + if (status < 0 || !result_buf.ptr) { + free(result_buf.ptr); + return error("path '%s': cannot merge", path); + } + + /* + * NEEDSWORK: + * There is absolutely no reason to write this as a blob object + * and create a phoney cache entry just to leak. This hack is + * primarily to get to the write_entry() machinery that massages + * the contents to work-tree format and writes out which only + * allows it for a cache entry. The code in write_entry() needs + * to be refactored to allow us to feed a + * instead of a cache entry. Such a refactoring would help + * merge_recursive as well (it also writes the merge result to the + * object database even when it may contain conflicts). + */ + if (write_sha1_file(result_buf.ptr, result_buf.size, + blob_type, sha1)) + die("Unable to add merge result for '%s'", path); + ce = make_cache_entry(create_ce_mode(active_cache[pos+1]->ce_mode), + sha1, + path, 2, 0); + if (!ce) + die("make_cache_entry failed for path '%s'", path); + status = checkout_entry(ce, state, NULL); + return status; +} -static int checkout_paths(struct tree *source_tree, const char **pathspec) +static int checkout_paths(struct tree *source_tree, const char **pathspec, + struct checkout_opts *opts) { int pos; struct checkout state; @@ -94,7 +222,8 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec) int flag; struct commit *head; int errs = 0; - + int stage = opts->writeout_stage; + int merge = opts->merge; int newfd; struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file)); @@ -122,8 +251,16 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec) if (pathspec_match(pathspec, NULL, ce->name, 0)) { if (!ce_stage(ce)) continue; - errs = 1; - error("path '%s' is unmerged", ce->name); + if (opts->force) { + warning("path '%s' is unmerged", ce->name); + } else if (stage) { + errs |= check_stage(stage, ce, pos); + } else if (opts->merge) { + errs |= check_all_stages(ce, pos); + } else { + errs = 1; + error("path '%s' is unmerged", ce->name); + } pos = skip_same_name(ce, pos) - 1; } } @@ -141,6 +278,10 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec) errs |= checkout_entry(ce, &state, NULL); continue; } + if (stage) + errs |= checkout_stage(stage, ce, pos, &state); + else if (merge) + errs |= checkout_merged(pos, &state); pos = skip_same_name(ce, pos) - 1; } } @@ -169,8 +310,7 @@ static void show_local_changes(struct object *head) static void describe_detached_head(char *msg, struct commit *commit) { - struct strbuf sb; - strbuf_init(&sb, 0); + struct strbuf sb = STRBUF_INIT; parse_commit(commit); pretty_print_commit(CMIT_FMT_ONELINE, commit, &sb, 0, NULL, NULL, 0, 0); fprintf(stderr, "%s %s... %s\n", msg, @@ -178,17 +318,6 @@ static void describe_detached_head(char *msg, struct commit *commit) strbuf_release(&sb); } -struct checkout_opts { - int quiet; - int merge; - int force; - int writeout_error; - - char *new_branch; - int new_branch_log; - enum branch_track track; -}; - static int reset_tree(struct tree *tree, struct checkout_opts *o, int worktree) { struct unpack_trees_options opts; @@ -230,8 +359,7 @@ struct branch_info { static void setup_branch_path(struct branch_info *branch) { - struct strbuf buf; - strbuf_init(&buf, 0); + struct strbuf buf = STRBUF_INIT; strbuf_addstr(&buf, "refs/heads/"); strbuf_addstr(&buf, branch->name); branch->path = strbuf_detach(&buf, NULL); @@ -293,6 +421,7 @@ static int merge_working_tree(struct checkout_opts *opts, */ struct tree *result; struct tree *work; + struct merge_options o; if (!opts->merge) return 1; parse_commit(old->commit); @@ -311,13 +440,17 @@ static int merge_working_tree(struct checkout_opts *opts, */ add_files_to_cache(NULL, NULL, 0); - work = write_tree_from_memory(); + init_merge_options(&o); + o.verbosity = 0; + work = write_tree_from_memory(&o); ret = reset_tree(new->commit->tree, opts, 1); if (ret) return ret; - merge_trees(new->commit->tree, work, old->commit->tree, - new->name, "local", &result); + o.branch1 = new->name; + o.branch2 = "local"; + merge_trees(&o, new->commit->tree, work, + old->commit->tree, &result); ret = reset_tree(new->commit->tree, opts, 0); if (ret) return ret; @@ -349,7 +482,7 @@ static void update_refs_for_switch(struct checkout_opts *opts, struct branch_info *old, struct branch_info *new) { - struct strbuf msg; + struct strbuf msg = STRBUF_INIT; const char *old_desc; if (opts->new_branch) { create_branch(old->name, opts->new_branch, new->name, 0, @@ -358,12 +491,11 @@ static void update_refs_for_switch(struct checkout_opts *opts, setup_branch_path(new); } - strbuf_init(&msg, 0); old_desc = old->name; - if (!old_desc) + if (!old_desc && old->commit) old_desc = sha1_to_hex(old->commit->object.sha1); strbuf_addf(&msg, "checkout: moving from %s to %s", - old_desc, new->name); + old_desc ? old_desc : "(invalid)", new->name); if (new->path) { create_symref("HEAD", new->path, msg.buf); @@ -419,7 +551,7 @@ static int switch_branches(struct checkout_opts *opts, struct branch_info *new) * a new commit, we want to mention the old commit once more * to remind the user that it might be lost. */ - if (!opts->quiet && !old.path && new->commit != old.commit) + if (!opts->quiet && !old.path && old.commit && new->commit != old.commit) describe_detached_head("Previous HEAD position was", old.commit); if (!old.commit) { @@ -440,6 +572,11 @@ static int switch_branches(struct checkout_opts *opts, struct branch_info *new) return ret || opts->writeout_error; } +static int git_checkout_config(const char *var, const char *value, void *cb) +{ + return git_xmerge_config(var, value, cb); +} + int cmd_checkout(int argc, const char **argv, const char *prefix) { struct checkout_opts opts; @@ -447,14 +584,21 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) const char *arg; struct branch_info new; struct tree *source_tree = NULL; + char *conflict_style = NULL; struct option options[] = { OPT__QUIET(&opts.quiet), OPT_STRING('b', NULL, &opts.new_branch, "new branch", "branch"), OPT_BOOLEAN('l', NULL, &opts.new_branch_log, "log for new branch"), OPT_SET_INT('t', "track", &opts.track, "track", BRANCH_TRACK_EXPLICIT), + OPT_SET_INT('2', "ours", &opts.writeout_stage, "stage", + 2), + OPT_SET_INT('3', "theirs", &opts.writeout_stage, "stage", + 3), OPT_BOOLEAN('f', NULL, &opts.force, "force"), - OPT_BOOLEAN('m', NULL, &opts.merge, "merge"), + OPT_BOOLEAN('m', "merge", &opts.merge, "merge"), + OPT_STRING(0, "conflict", &conflict_style, "style", + "conflict style (merge or diff3)"), OPT_END(), }; int has_dash_dash; @@ -462,15 +606,34 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) memset(&opts, 0, sizeof(opts)); memset(&new, 0, sizeof(new)); - git_config(git_default_config, NULL); + git_config(git_checkout_config, NULL); - opts.track = git_branch_track; + opts.track = BRANCH_TRACK_UNSPECIFIED; argc = parse_options(argc, argv, options, checkout_usage, PARSE_OPT_KEEP_DASHDASH); - if (!opts.new_branch && (opts.track != git_branch_track)) - die("git checkout: --track and --no-track require -b"); + /* --track without -b should DWIM */ + if (0 < opts.track && !opts.new_branch) { + const char *argv0 = argv[0]; + if (!argc || !strcmp(argv0, "--")) + die ("--track needs a branch name"); + if (!prefixcmp(argv0, "refs/")) + argv0 += 5; + if (!prefixcmp(argv0, "remotes/")) + argv0 += 8; + argv0 = strchr(argv0, '/'); + if (!argv0 || !argv0[1]) + die ("Missing branch name; try -b"); + opts.new_branch = argv0 + 1; + } + + if (opts.track == BRANCH_TRACK_UNSPECIFIED) + opts.track = git_branch_track; + if (conflict_style) { + opts.merge = 1; /* implied */ + git_xmerge_config("merge.conflictstyle", conflict_style, NULL); + } if (opts.force && opts.merge) die("git checkout: -f and -m are incompatible"); @@ -554,20 +717,22 @@ no_reference: die("invalid path specification"); /* Checkout paths */ - if (opts.new_branch || opts.force || opts.merge) { + if (opts.new_branch) { if (argc == 1) { - die("git checkout: updating paths is incompatible with switching branches/forcing\nDid you intend to checkout '%s' which can not be resolved as commit?", argv[0]); + die("git checkout: updating paths is incompatible with switching branches.\nDid you intend to checkout '%s' which can not be resolved as commit?", argv[0]); } else { - die("git checkout: updating paths is incompatible with switching branches/forcing"); + die("git checkout: updating paths is incompatible with switching branches."); } } - return checkout_paths(source_tree, pathspec); + if (1 < !!opts.writeout_stage + !!opts.force + !!opts.merge) + die("git checkout: --ours/--theirs, --force and --merge are incompatible when\nchecking out of the index."); + + return checkout_paths(source_tree, pathspec, &opts); } if (opts.new_branch) { - struct strbuf buf; - strbuf_init(&buf, 0); + struct strbuf buf = STRBUF_INIT; strbuf_addstr(&buf, "refs/heads/"); strbuf_addstr(&buf, opts.new_branch); if (!get_sha1(buf.buf, rev)) @@ -580,6 +745,8 @@ no_reference: if (new.name && !new.commit) { die("Cannot switch branch to a non-commit."); } + if (opts.writeout_stage) + die("--ours/--theirs is incompatible with switching branches."); return switch_branches(&opts, &new); }