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-rw-r--r--archive.c259
1 files changed, 249 insertions, 10 deletions
diff --git a/archive.c b/archive.c
index b8b45bad77..d700af3b62 100644
--- a/archive.c
+++ b/archive.c
@@ -1,18 +1,41 @@
#include "cache.h"
#include "commit.h"
+#include "tree-walk.h"
#include "attr.h"
#include "archive.h"
+#include "parse-options.h"
+#include "unpack-trees.h"
+
+static char const * const archive_usage[] = {
+ "git archive [options] <tree-ish> [path...]",
+ "git archive --list",
+ "git archive --remote <repo> [--exec <cmd>] [options] <tree-ish> [path...]",
+ "git archive --remote <repo> [--exec <cmd>] --list",
+ NULL
+};
+
+#define USES_ZLIB_COMPRESSION 1
+
+static const struct archiver {
+ const char *name;
+ write_archive_fn_t write_archive;
+ unsigned int flags;
+} archivers[] = {
+ { "tar", write_tar_archive },
+ { "zip", write_zip_archive, USES_ZLIB_COMPRESSION },
+};
static void format_subst(const struct commit *commit,
const char *src, size_t len,
struct strbuf *buf)
{
char *to_free = NULL;
- struct strbuf fmt;
+ struct strbuf fmt = STRBUF_INIT;
+ struct pretty_print_context ctx = {0};
+ ctx.date_mode = DATE_NORMAL;
if (src == buf->buf)
to_free = strbuf_detach(buf, NULL);
- strbuf_init(&fmt, 0);
for (;;) {
const char *b, *c;
@@ -27,7 +50,7 @@ static void format_subst(const struct commit *commit,
strbuf_add(&fmt, b + 8, c - b - 8);
strbuf_add(buf, src, b - src);
- format_commit_message(commit, fmt.buf, buf);
+ format_commit_message(commit, fmt.buf, buf, &ctx);
len -= c + 1 - src;
src = c + 1;
}
@@ -44,10 +67,9 @@ static void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
buffer = read_sha1_file(sha1, type, sizep);
if (buffer && S_ISREG(mode)) {
- struct strbuf buf;
+ struct strbuf buf = STRBUF_INIT;
size_t size = 0;
- strbuf_init(&buf, 0);
strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
convert_to_working_tree(path, buf.buf, buf.len, &buf);
if (commit)
@@ -65,8 +87,8 @@ static void setup_archive_check(struct git_attr_check *check)
static struct git_attr *attr_export_subst;
if (!attr_export_ignore) {
- attr_export_ignore = git_attr("export-ignore", 13);
- attr_export_subst = git_attr("export-subst", 12);
+ attr_export_ignore = git_attr("export-ignore");
+ attr_export_subst = git_attr("export-subst");
}
check[0].attr = attr_export_ignore;
check[1].attr = attr_export_subst;
@@ -95,6 +117,7 @@ static int write_archive_entry(const unsigned char *sha1, const char *base,
strbuf_reset(&path);
strbuf_grow(&path, PATH_MAX);
+ strbuf_add(&path, args->base, args->baselen);
strbuf_add(&path, base, baselen);
strbuf_addstr(&path, filename);
path_without_prefix = path.buf + args->baselen;
@@ -113,7 +136,7 @@ static int write_archive_entry(const unsigned char *sha1, const char *base,
err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0);
if (err)
return err;
- return READ_TREE_RECURSIVE;
+ return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
}
buffer = sha1_file_to_archive(path_without_prefix, sha1, mode,
@@ -131,6 +154,8 @@ int write_archive_entries(struct archiver_args *args,
write_archive_entry_fn_t write_entry)
{
struct archiver_context context;
+ struct unpack_trees_options opts;
+ struct tree_desc t;
int err;
if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
@@ -149,9 +174,223 @@ int write_archive_entries(struct archiver_args *args,
context.args = args;
context.write_entry = write_entry;
- err = read_tree_recursive(args->tree, args->base, args->baselen, 0,
- args->pathspec, write_archive_entry, &context);
+ /*
+ * Setup index and instruct attr to read index only
+ */
+ if (!args->worktree_attributes) {
+ memset(&opts, 0, sizeof(opts));
+ opts.index_only = 1;
+ opts.head_idx = -1;
+ opts.src_index = &the_index;
+ opts.dst_index = &the_index;
+ opts.fn = oneway_merge;
+ init_tree_desc(&t, args->tree->buffer, args->tree->size);
+ if (unpack_trees(1, &t, &opts))
+ return -1;
+ git_attr_set_direction(GIT_ATTR_INDEX, &the_index);
+ }
+
+ err = read_tree_recursive(args->tree, "", 0, 0, args->pathspec,
+ write_archive_entry, &context);
if (err == READ_TREE_RECURSIVE)
err = 0;
return err;
}
+
+static const struct archiver *lookup_archiver(const char *name)
+{
+ int i;
+
+ if (!name)
+ return NULL;
+
+ for (i = 0; i < ARRAY_SIZE(archivers); i++) {
+ if (!strcmp(name, archivers[i].name))
+ return &archivers[i];
+ }
+ return NULL;
+}
+
+static int reject_entry(const unsigned char *sha1, const char *base,
+ int baselen, const char *filename, unsigned mode,
+ int stage, void *context)
+{
+ return -1;
+}
+
+static int path_exists(struct tree *tree, const char *path)
+{
+ const char *pathspec[] = { path, NULL };
+
+ if (read_tree_recursive(tree, "", 0, 0, pathspec, reject_entry, NULL))
+ return 1;
+ return 0;
+}
+
+static void parse_pathspec_arg(const char **pathspec,
+ struct archiver_args *ar_args)
+{
+ ar_args->pathspec = pathspec = get_pathspec("", pathspec);
+ if (pathspec) {
+ while (*pathspec) {
+ if (!path_exists(ar_args->tree, *pathspec))
+ die("path not found: %s", *pathspec);
+ pathspec++;
+ }
+ }
+}
+
+static void parse_treeish_arg(const char **argv,
+ struct archiver_args *ar_args, const char *prefix)
+{
+ const char *name = argv[0];
+ const unsigned char *commit_sha1;
+ time_t archive_time;
+ struct tree *tree;
+ const struct commit *commit;
+ unsigned char sha1[20];
+
+ if (get_sha1(name, sha1))
+ die("Not a valid object name");
+
+ commit = lookup_commit_reference_gently(sha1, 1);
+ if (commit) {
+ commit_sha1 = commit->object.sha1;
+ archive_time = commit->date;
+ } else {
+ commit_sha1 = NULL;
+ archive_time = time(NULL);
+ }
+
+ tree = parse_tree_indirect(sha1);
+ if (tree == NULL)
+ die("not a tree object");
+
+ if (prefix) {
+ unsigned char tree_sha1[20];
+ unsigned int mode;
+ int err;
+
+ err = get_tree_entry(tree->object.sha1, prefix,
+ tree_sha1, &mode);
+ if (err || !S_ISDIR(mode))
+ die("current working directory is untracked");
+
+ tree = parse_tree_indirect(tree_sha1);
+ }
+ ar_args->tree = tree;
+ ar_args->commit_sha1 = commit_sha1;
+ ar_args->commit = commit;
+ ar_args->time = archive_time;
+}
+
+#define OPT__COMPR(s, v, h, p) \
+ { OPTION_SET_INT, (s), NULL, (v), NULL, (h), \
+ PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) }
+#define OPT__COMPR_HIDDEN(s, v, p) \
+ { OPTION_SET_INT, (s), NULL, (v), NULL, "", \
+ PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN, NULL, (p) }
+
+static int parse_archive_args(int argc, const char **argv,
+ const struct archiver **ar, struct archiver_args *args)
+{
+ const char *format = "tar";
+ const char *base = NULL;
+ const char *remote = NULL;
+ const char *exec = NULL;
+ const char *output = NULL;
+ int compression_level = -1;
+ int verbose = 0;
+ int i;
+ int list = 0;
+ int worktree_attributes = 0;
+ struct option opts[] = {
+ OPT_GROUP(""),
+ OPT_STRING(0, "format", &format, "fmt", "archive format"),
+ OPT_STRING(0, "prefix", &base, "prefix",
+ "prepend prefix to each pathname in the archive"),
+ OPT_STRING('o', "output", &output, "file",
+ "write the archive to this file"),
+ OPT_BOOLEAN(0, "worktree-attributes", &worktree_attributes,
+ "read .gitattributes in working directory"),
+ OPT__VERBOSE(&verbose),
+ OPT__COMPR('0', &compression_level, "store only", 0),
+ OPT__COMPR('1', &compression_level, "compress faster", 1),
+ OPT__COMPR_HIDDEN('2', &compression_level, 2),
+ OPT__COMPR_HIDDEN('3', &compression_level, 3),
+ OPT__COMPR_HIDDEN('4', &compression_level, 4),
+ OPT__COMPR_HIDDEN('5', &compression_level, 5),
+ OPT__COMPR_HIDDEN('6', &compression_level, 6),
+ OPT__COMPR_HIDDEN('7', &compression_level, 7),
+ OPT__COMPR_HIDDEN('8', &compression_level, 8),
+ OPT__COMPR('9', &compression_level, "compress better", 9),
+ OPT_GROUP(""),
+ OPT_BOOLEAN('l', "list", &list,
+ "list supported archive formats"),
+ OPT_GROUP(""),
+ OPT_STRING(0, "remote", &remote, "repo",
+ "retrieve the archive from remote repository <repo>"),
+ OPT_STRING(0, "exec", &exec, "cmd",
+ "path to the remote git-upload-archive command"),
+ OPT_END()
+ };
+
+ argc = parse_options(argc, argv, NULL, opts, archive_usage, 0);
+
+ if (remote)
+ die("Unexpected option --remote");
+ if (exec)
+ die("Option --exec can only be used together with --remote");
+ if (output)
+ die("Unexpected option --output");
+
+ if (!base)
+ base = "";
+
+ if (list) {
+ for (i = 0; i < ARRAY_SIZE(archivers); i++)
+ printf("%s\n", archivers[i].name);
+ exit(0);
+ }
+
+ /* We need at least one parameter -- tree-ish */
+ if (argc < 1)
+ usage_with_options(archive_usage, opts);
+ *ar = lookup_archiver(format);
+ if (!*ar)
+ die("Unknown archive format '%s'", format);
+
+ args->compression_level = Z_DEFAULT_COMPRESSION;
+ if (compression_level != -1) {
+ if ((*ar)->flags & USES_ZLIB_COMPRESSION)
+ args->compression_level = compression_level;
+ else {
+ die("Argument not supported for format '%s': -%d",
+ format, compression_level);
+ }
+ }
+ args->verbose = verbose;
+ args->base = base;
+ args->baselen = strlen(base);
+ args->worktree_attributes = worktree_attributes;
+
+ return argc;
+}
+
+int write_archive(int argc, const char **argv, const char *prefix,
+ int setup_prefix)
+{
+ const struct archiver *ar = NULL;
+ struct archiver_args args;
+
+ argc = parse_archive_args(argc, argv, &ar, &args);
+ if (setup_prefix && prefix == NULL)
+ prefix = setup_git_directory();
+
+ parse_treeish_arg(argv, &args, prefix);
+ parse_pathspec_arg(argv + 1, &args);
+
+ git_config(git_default_config, NULL);
+
+ return ar->write_archive(&args);
+}
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