#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];
return 0;
}
-static const char read_tree_usage[] = "git read-tree (<sha> | [[-m [--trivial] [--aggressive] | --reset | --prefix=<prefix>] [-u | -i]] [--exclude-per-directory=<gitignore>] [--index-output=<file>] <sha1> [<sha2> [<sha3>]])";
+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;
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;
git_config(git_default_config, NULL);
- newfd = hold_locked_index(&lock_file, 1);
-
- for (i = 1; i < argc; i++) {
- const char *arg = argv[i];
+ argc = parse_options(argc, argv, unused_prefix, read_tree_options,
+ read_tree_usage, 0);
- /* "-u" means "update", meaning that a merge will update
- * the working tree.
- */
- if (!strcmp(arg, "-u")) {
- opts.update = 1;
- continue;
- }
-
- if (!strcmp(arg, "-v")) {
- opts.verbose_update = 1;
- continue;
- }
-
- /* "-i" means "index only", meaning that a merge will
- * not even look at the working tree.
- */
- if (!strcmp(arg, "-i")) {
- opts.index_only = 1;
- continue;
- }
-
- if (!prefixcmp(arg, "--index-output=")) {
- set_alternate_index_output(arg + 15);
- continue;
- }
-
- /* "--prefix=<subdirectory>/" means keep the current index
- * entries and put the entries from the tree under the
- * given subdirectory.
- */
- if (!prefixcmp(arg, "--prefix=")) {
- if (stage || opts.merge || opts.prefix)
- usage(read_tree_usage);
- opts.prefix = arg + 9;
- opts.merge = 1;
- stage = 1;
- if (read_cache_unmerged())
- die("you need to resolve your current index first");
- continue;
- }
-
- /* This differs from "-m" in that we'll silently ignore
- * unmerged entries and overwrite working tree files that
- * correspond to them.
- */
- if (!strcmp(arg, "--reset")) {
- if (stage || opts.merge || opts.prefix)
- usage(read_tree_usage);
- opts.reset = 1;
- opts.merge = 1;
- stage = 1;
- read_cache_unmerged();
- continue;
- }
-
- if (!strcmp(arg, "--trivial")) {
- opts.trivial_merges_only = 1;
- continue;
- }
-
- if (!strcmp(arg, "--aggressive")) {
- opts.aggressive = 1;
- continue;
- }
+ newfd = hold_locked_index(&lock_file, 1);
- /* "-m" stands for "merge", meaning we start in stage 1 */
- if (!strcmp(arg, "-m")) {
- if (stage || opts.merge || opts.prefix)
- usage(read_tree_usage);
- if (read_cache_unmerged())
- die("you need to resolve your current index first");
- stage = 1;
- opts.merge = 1;
- continue;
- }
+ prefix_set = opts.prefix ? 1 : 0;
+ if (1 < opts.merge + opts.reset + prefix_set)
+ die("Which one? -m, --reset, or --prefix?");
- if (!prefixcmp(arg, "--exclude-per-directory=")) {
- struct dir_struct *dir;
-
- if (opts.dir)
- die("more than one --exclude-per-directory are given.");
-
- dir = xcalloc(1, sizeof(*opts.dir));
- dir->flags |= DIR_SHOW_IGNORED;
- dir->exclude_per_dir = arg + 24;
- 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.
- */
- continue;
- }
+ 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();
- /* using -u and -i at the same time makes no sense */
- if (1 < opts.index_only + opts.update)
- usage(read_tree_usage);
+ for (i = 0; i < argc; i++) {
+ const char *arg = argv[i];
if (get_sha1(arg, sha1))
die("Not a valid object name %s", arg);
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)
- usage(read_tree_usage);
+ 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)
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];
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