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author | Junio C Hamano <gitster@pobox.com> | 2010-07-08 18:55:50 -0700 |
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committer | Junio C Hamano <gitster@pobox.com> | 2010-07-08 18:55:50 -0700 |
commit | 037c43c68e220739e690540de89a6d5835fefe73 (patch) | |
tree | 3e201f833fc63e48db6983e45ce2425d884408db /builtin/read-tree.c | |
parent | b1f47514f207b0601de7b0936cf13b3c0ae70081 (diff) | |
parent | 9918285fb10d81af9021dae99c5f4de88ded497c (diff) | |
download | git-037c43c68e220739e690540de89a6d5835fefe73.tar.gz |
Merge remote branch 'ko/master' into jc/read-tree-cache-tree-fix
* ko/master: (2325 commits)
Git 1.7.2-rc2
backmerge a few more fixes to 1.7.1.X series
fix git branch -m in presence of cross devices
t/t0006: specify timezone as EST5 not EST to comply with POSIX
add missing && to submodule-merge testcase
t/README: document more test helpers
test-date: fix sscanf type conversion
xdiff: optimise for no whitespace difference when ignoring whitespace.
gitweb: Move evaluate_gitweb_config out of run_request
parse_date: fix signedness in timezone calculation
t0006: test timezone parsing
rerere.txt: Document forget subcommand
t/README: proposed rewording...
t/README: Document the do's and don'ts of tests
t/README: Add a section about skipping tests
t/README: Document test_expect_code
t/README: Document test_external*
t/README: Document the prereq functions, and 3-arg test_*
t/README: Typo: paralell -> parallel
t/README: The trash is in 't/trash directory.$name'
...
Conflicts:
builtin-read-tree.c
Diffstat (limited to 'builtin/read-tree.c')
-rw-r--r-- | builtin/read-tree.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/builtin/read-tree.c b/builtin/read-tree.c new file mode 100644 index 0000000000..9ad1e66916 --- /dev/null +++ b/builtin/read-tree.c @@ -0,0 +1,230 @@ +/* + * GIT - The information manager from hell + * + * Copyright (C) Linus Torvalds, 2005 + */ + +#include "cache.h" +#include "object.h" +#include "tree.h" +#include "tree-walk.h" +#include "cache-tree.h" +#include "unpack-trees.h" +#include "dir.h" +#include "builtin.h" +#include "parse-options.h" +#include "resolve-undo.h" + +static int nr_trees; +static struct tree *trees[MAX_UNPACK_TREES]; + +static int list_tree(unsigned char *sha1) +{ + struct tree *tree; + + if (nr_trees >= MAX_UNPACK_TREES) + die("I cannot read more than %d trees", MAX_UNPACK_TREES); + tree = parse_tree_indirect(sha1); + if (!tree) + return -1; + trees[nr_trees++] = tree; + return 0; +} + +static const char * const read_tree_usage[] = { + "git read-tree [[-m [--trivial] [--aggressive] | --reset | --prefix=<prefix>] [-u [--exclude-per-directory=<gitignore>] | -i]] [--no-sparse-checkout] [--index-output=<file>] <tree-ish1> [<tree-ish2> [<tree-ish3>]]", + NULL +}; + +static int index_output_cb(const struct option *opt, const char *arg, + int unset) +{ + set_alternate_index_output(arg); + return 0; +} + +static int exclude_per_directory_cb(const struct option *opt, const char *arg, + int unset) +{ + struct dir_struct *dir; + struct unpack_trees_options *opts; + + opts = (struct unpack_trees_options *)opt->value; + + if (opts->dir) + die("more than one --exclude-per-directory given."); + + dir = xcalloc(1, sizeof(*opts->dir)); + dir->flags |= DIR_SHOW_IGNORED; + dir->exclude_per_dir = arg; + opts->dir = dir; + /* We do not need to nor want to do read-directory + * here; we are merely interested in reusing the + * per directory ignore stack mechanism. + */ + return 0; +} + +static void debug_stage(const char *label, struct cache_entry *ce, + struct unpack_trees_options *o) +{ + printf("%s ", label); + if (!ce) + printf("(missing)\n"); + else if (ce == o->df_conflict_entry) + printf("(conflict)\n"); + else + printf("%06o #%d %s %.8s\n", + ce->ce_mode, ce_stage(ce), ce->name, + sha1_to_hex(ce->sha1)); +} + +static int debug_merge(struct cache_entry **stages, struct unpack_trees_options *o) +{ + int i; + + printf("* %d-way merge\n", o->merge_size); + debug_stage("index", stages[0], o); + for (i = 1; i <= o->merge_size; i++) { + char buf[24]; + sprintf(buf, "ent#%d", i); + debug_stage(buf, stages[i], o); + } + return 0; +} + +static struct lock_file lock_file; + +int cmd_read_tree(int argc, const char **argv, const char *unused_prefix) +{ + int i, newfd, stage = 0; + unsigned char sha1[20]; + struct tree_desc t[MAX_UNPACK_TREES]; + struct unpack_trees_options opts; + int prefix_set = 0; + const struct option read_tree_options[] = { + { OPTION_CALLBACK, 0, "index-output", NULL, "FILE", + "write resulting index to <FILE>", + PARSE_OPT_NONEG, index_output_cb }, + OPT__VERBOSE(&opts.verbose_update), + OPT_GROUP("Merging"), + OPT_SET_INT('m', NULL, &opts.merge, + "perform a merge in addition to a read", 1), + OPT_SET_INT(0, "trivial", &opts.trivial_merges_only, + "3-way merge if no file level merging required", 1), + OPT_SET_INT(0, "aggressive", &opts.aggressive, + "3-way merge in presence of adds and removes", 1), + OPT_SET_INT(0, "reset", &opts.reset, + "same as -m, but discard unmerged entries", 1), + { OPTION_STRING, 0, "prefix", &opts.prefix, "<subdirectory>/", + "read the tree into the index under <subdirectory>/", + PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP }, + OPT_SET_INT('u', NULL, &opts.update, + "update working tree with merge result", 1), + { OPTION_CALLBACK, 0, "exclude-per-directory", &opts, + "gitignore", + "allow explicitly ignored files to be overwritten", + PARSE_OPT_NONEG, exclude_per_directory_cb }, + OPT_SET_INT('i', NULL, &opts.index_only, + "don't check the working tree after merging", 1), + OPT_SET_INT(0, "no-sparse-checkout", &opts.skip_sparse_checkout, + "skip applying sparse checkout filter", 1), + OPT_SET_INT(0, "debug-unpack", &opts.debug_unpack, + "debug unpack-trees", 1), + OPT_END() + }; + + memset(&opts, 0, sizeof(opts)); + opts.head_idx = -1; + opts.src_index = &the_index; + opts.dst_index = &the_index; + + git_config(git_default_config, NULL); + + argc = parse_options(argc, argv, unused_prefix, read_tree_options, + read_tree_usage, 0); + + newfd = hold_locked_index(&lock_file, 1); + + prefix_set = opts.prefix ? 1 : 0; + if (1 < opts.merge + opts.reset + prefix_set) + die("Which one? -m, --reset, or --prefix?"); + + if (opts.reset || opts.merge || opts.prefix) { + if (read_cache_unmerged() && (opts.prefix || opts.merge)) + die("You need to resolve your current index first"); + stage = opts.merge = 1; + } + resolve_undo_clear(); + + for (i = 0; i < argc; i++) { + const char *arg = argv[i]; + + if (get_sha1(arg, sha1)) + die("Not a valid object name %s", arg); + if (list_tree(sha1) < 0) + die("failed to unpack tree object %s", arg); + stage++; + } + if (1 < opts.index_only + opts.update) + die("-u and -i at the same time makes no sense"); + if ((opts.update||opts.index_only) && !opts.merge) + die("%s is meaningless without -m, --reset, or --prefix", + opts.update ? "-u" : "-i"); + if ((opts.dir && !opts.update)) + die("--exclude-per-directory is meaningless unless -u"); + if (opts.merge && !opts.index_only) + setup_work_tree(); + + if (opts.merge) { + if (stage < 2) + die("just how do you expect me to merge %d trees?", stage-1); + switch (stage - 1) { + case 1: + opts.fn = opts.prefix ? bind_merge : oneway_merge; + break; + case 2: + opts.fn = twoway_merge; + opts.initial_checkout = is_cache_unborn(); + break; + case 3: + default: + opts.fn = threeway_merge; + break; + } + + if (stage - 1 >= 3) + opts.head_idx = stage - 2; + else + opts.head_idx = 1; + } + + if (opts.debug_unpack) + opts.fn = debug_merge; + + cache_tree_free(&active_cache_tree); + for (i = 0; i < nr_trees; i++) { + struct tree *tree = trees[i]; + parse_tree(tree); + init_tree_desc(t+i, tree->buffer, tree->size); + } + if (unpack_trees(nr_trees, t, &opts)) + return 128; + + if (opts.debug_unpack) + return 0; /* do not write the index out */ + + /* + * When reading only one tree (either the most basic form, + * "-m ent" or "--reset ent" form), we can obtain a fully + * valid cache-tree because the index must match exactly + * what came from the tree. + */ + if (nr_trees == 1 && !opts.prefix) + prime_cache_tree(&active_cache_tree, trees[0]); + + if (write_cache(newfd, active_cache, active_nr) || + commit_locked_index(&lock_file)) + die("unable to write new index file"); + return 0; +} |