git-pack-objects: add "--stdout" flag to write the pack file to stdout

This also suppresses creation of the index file.

diff --git a/pack-objects.c b/pack-objects.c
index 90b27c60c3a889d7534e17af51b3e8b79b1d2b24..e9764604f6f17f4eb018b4fd7247550e90583f8c 100644 (file)
--- a/pack-objects.c
+++ b/pack-objects.c
@@ -4,7 +4,7 @@
 #include "delta.h"
 #include "csum-file.h"
 
-static const char pack_usage[] = "git-pack-objects [--window=N] [--depth=N] base-name < object-list";
+static const char pack_usage[] = "git-pack-objects [--window=N] [--depth=N] {--stdout | base-name} < object-list";
 
 /*
  * The object type is a single-character shorthand:
@@ -87,10 +87,14 @@ static unsigned long write_object(struct sha1file *f, struct object_entry *entry
 static void write_pack_file(void)
 {
        int i;
-       struct sha1file *f = sha1create("%s.%s", base_name, "pack");
+       struct sha1file *f;
        unsigned long offset = 0;
        unsigned long mb;
 
+       if (!base_name)
+               f = sha1fd(1, "<stdout>");
+       else
+               f = sha1create("%s.%s", base_name, "pack");
        for (i = 0; i < nr_objects; i++) {
                struct object_entry *entry = objects + i;
                entry->offset = offset;
@@ -334,7 +338,7 @@ static void find_deltas(struct object_entry **list, int window, int depth)
 int main(int argc, char **argv)
 {
        char line[PATH_MAX + 20];
-       int window = 10, depth = 10;
+       int window = 10, depth = 10, pack_to_stdout = 0;
        int i;
 
        for (i = 1; i < argc; i++) {
@@ -355,6 +359,10 @@ int main(int argc, char **argv)
                                        usage(pack_usage);
                                continue;
                        }
+                       if (!strcmp("--stdout", arg)) {
+                               pack_to_stdout = 1;
+                               continue;
+                       }
                        usage(pack_usage);
                }
                if (base_name)
@@ -362,7 +370,7 @@ int main(int argc, char **argv)
                base_name = arg;
        }
 
-       if (!base_name)
+       if (pack_to_stdout != !base_name)
                usage(pack_usage);
 
        while (fgets(line, sizeof(line), stdin) != NULL) {
@@ -384,7 +392,7 @@ int main(int argc, char **argv)
        }
        get_object_details();
 
-       printf("Packing %d objects\n", nr_objects);
+       fprintf(stderr, "Packing %d objects\n", nr_objects);
 
        sorted_by_sha = create_sorted_list(sha1_sort);
        sorted_by_type = create_sorted_list(type_size_sort);
@@ -392,6 +400,7 @@ int main(int argc, char **argv)
                find_deltas(sorted_by_type, window+1, depth);
 
        write_pack_file();
-       write_index_file();
+       if (!pack_to_stdout)
+               write_index_file();
        return 0;
 }