Re-implement 'git remote update' using 'git fetch'

diff --git a/archive.c b/archive.c
index 45d242b884c2796b67329aaabfea62cd1e7bbecb..0cc79d2a240ac260fec66e6c30e28b438bcb5948 100644 (file)
--- a/archive.c
+++ b/archive.c
@@ -4,6 +4,7 @@
 #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...]",
@@ -15,7 +16,7 @@ static char const * const archive_usage[] = {
 
 #define USES_ZLIB_COMPRESSION 1
 
-const struct archiver {
+static const struct archiver {
        const char *name;
        write_archive_fn_t write_archive;
        unsigned int flags;
@@ -29,11 +30,10 @@ static void format_subst(const struct commit *commit,
                          struct strbuf *buf)
 {
        char *to_free = NULL;
-       struct strbuf fmt;
+       struct strbuf fmt = STRBUF_INIT;
 
        if (src == buf->buf)
                to_free = strbuf_detach(buf, NULL);
-       strbuf_init(&fmt, 0);
        for (;;) {
                const char *b, *c;
 
@@ -65,10 +65,9 @@ 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)
@@ -116,6 +115,7 @@ 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;
@@ -134,7 +134,7 @@ 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,
@@ -152,6 +152,8 @@ 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] == '/') {
@@ -170,8 +172,24 @@ 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;
@@ -194,7 +212,7 @@ static const struct archiver *lookup_archiver(const char *name)
 static void parse_pathspec_arg(const char **pathspec,
                struct archiver_args *ar_args)
 {
-       ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
+       ar_args->pathspec = get_pathspec("", pathspec);
 }
 
 static void parse_treeish_arg(const char **argv,
@@ -255,15 +273,21 @@ static int parse_archive_args(int argc, const char **argv,
        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),
@@ -286,12 +310,14 @@ static int parse_archive_args(int argc, const char **argv,
                OPT_END()
        };
 
-       argc = parse_options(argc, argv, opts, archive_usage, 0);
+       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 = "";
@@ -321,6 +347,7 @@ static int parse_archive_args(int argc, const char **argv,
        args->verbose = verbose;
        args->base = base;
        args->baselen = strlen(base);
+       args->worktree_attributes = worktree_attributes;
 
        return argc;
 }