cvsserver: checkout faster by sending files in a sensible order

[git.git] / checkout-index.c

diff --git a/checkout-index.c b/checkout-index.c
index 596d320..f54c606 100644 (file)
--- a/checkout-index.c
+++ b/checkout-index.c
@@ -22,6 +22,10 @@
  *
  *     find . -name '*.h' -print0 | xargs -0 git-checkout-index -f --
  *
+ * or:
+ *
+ *     find . -name '*.h' -print0 | git-checkout-index -f -z --stdin
+ *
  * which will force all existing *.h files to be replaced with
  * their cached copies. If an empty command line implied "all",
  * then this would force-refresh everything in the cache, which
@@ -33,6 +37,12 @@
  * but get used to it in scripting!).
  */
 #include "cache.h"
+#include "strbuf.h"
+#include "quote.h"
+
+static const char *prefix;
+static int prefix_length;
+static int checkout_stage; /* default to checkout stage0 */
 
 static struct checkout state = {
        .base_dir = "",
@@ -45,38 +55,63 @@ static struct checkout state = {
 
 static int checkout_file(const char *name)
 {
-       int pos = cache_name_pos(name, strlen(name));
-       if (pos < 0) {
-               if (!state.quiet) {
-                       pos = -pos - 1;
-                       fprintf(stderr,
-                               "git-checkout-index: %s is %s.\n",
-                               name,
-                               (pos < active_nr &&
-                                !strcmp(active_cache[pos]->name, name)) ?
-                               "unmerged" : "not in the cache");
-               }
-               return -1;
+       int namelen = strlen(name);
+       int pos = cache_name_pos(name, namelen);
+       int has_same_name = 0;
+
+       if (pos < 0)
+               pos = -pos - 1;
+
+       while (pos < active_nr) {
+               struct cache_entry *ce = active_cache[pos];
+               if (ce_namelen(ce) != namelen ||
+                   memcmp(ce->name, name, namelen))
+                       break;
+               has_same_name = 1;
+               if (checkout_stage == ce_stage(ce))
+                       return checkout_entry(ce, &state);
+               pos++;
+       }
+
+       if (!state.quiet) {
+               fprintf(stderr, "git-checkout-index: %s ", name);
+               if (!has_same_name)
+                       fprintf(stderr, "is not in the cache");
+               else if (checkout_stage)
+                       fprintf(stderr, "does not exist at stage %d",
+                               checkout_stage);
+               else
+                       fprintf(stderr, "is unmerged");
+               fputc('\n', stderr);
        }
-       return checkout_entry(active_cache[pos], &state);
+       return -1;
 }
 
 static int checkout_all(void)
 {
-       int i;
+       int i, errs = 0;
 
        for (i = 0; i < active_nr ; i++) {
                struct cache_entry *ce = active_cache[i];
-               if (ce_stage(ce))
+               if (ce_stage(ce) != checkout_stage)
+                       continue;
+               if (prefix && *prefix &&
+                   (ce_namelen(ce) <= prefix_length ||
+                    memcmp(prefix, ce->name, prefix_length)))
                        continue;
                if (checkout_entry(ce, &state) < 0)
-                       return -1;
+                       errs++;
        }
+       if (errs)
+               /* we have already done our error reporting.
+                * exit with the same code as die().
+                */
+               exit(128);
        return 0;
 }
 
 static const char checkout_cache_usage[] =
-"git-checkout-index [-u] [-q] [-a] [-f] [-n] [--prefix=<string>] [--] <file>...";
+"git-checkout-index [-u] [-q] [-a] [-f] [-n] [--stage=[123]] [--prefix=<string>] [--] <file>...";
 
 static struct cache_file cache_file;
 
@@ -85,6 +120,12 @@ int main(int argc, char **argv)
        int i;
        int newfd = -1;
        int all = 0;
+       int read_from_stdin = 0;
+       int line_termination = '\n';
+
+       prefix = setup_git_directory();
+       git_config(git_default_config);
+       prefix_length = prefix ? strlen(prefix) : 0;
 
        if (read_cache() < 0) {
                die("invalid cache");
@@ -123,11 +164,30 @@ int main(int argc, char **argv)
                                die("cannot open index.lock file.");
                        continue;
                }
-               if (!memcmp(arg, "--prefix=", 9)) {
+               if (!strcmp(arg, "-z")) {
+                       line_termination = 0;
+                       continue;
+               }
+               if (!strcmp(arg, "--stdin")) {
+                       if (i != argc - 1)
+                               die("--stdin must be at the end");
+                       read_from_stdin = 1;
+                       i++; /* do not consider arg as a file name */
+                       break;
+               }
+               if (!strncmp(arg, "--prefix=", 9)) {
                        state.base_dir = arg+9;
                        state.base_dir_len = strlen(state.base_dir);
                        continue;
                }
+               if (!strncmp(arg, "--stage=", 8)) {
+                       int ch = arg[8];
+                       if ('1' <= ch && ch <= '3')
+                               checkout_stage = arg[8] - '0';
+                       else
+                               die("stage should be between 1 and 3");
+                       continue;
+               }
                if (arg[0] == '-')
                        usage(checkout_cache_usage);
                break;
@@ -150,7 +210,29 @@ int main(int argc, char **argv)
 
                if (all)
                        die("git-checkout-index: don't mix '--all' and explicit filenames");
-               checkout_file(arg);
+               if (read_from_stdin)
+                       die("git-checkout-index: don't mix '--stdin' and explicit filenames");
+               checkout_file(prefix_path(prefix, prefix_length, arg));
+       }
+
+       if (read_from_stdin) {
+               struct strbuf buf;
+               if (all)
+                       die("git-checkout-index: don't mix '--all' and '--stdin'");
+               strbuf_init(&buf);
+               while (1) {
+                       char *path_name;
+                       read_line(&buf, stdin, line_termination);
+                       if (buf.eof)
+                               break;
+                       if (line_termination && buf.buf[0] == '"')
+                               path_name = unquote_c_style(buf.buf, NULL);
+                       else
+                               path_name = buf.buf;
+                       checkout_file(prefix_path(prefix, prefix_length, path_name));
+                       if (path_name != buf.buf)
+                               free(path_name);
+               }
        }
 
        if (all)