grep: micro-optimize hit collection for AND nodes

[git.git] / archive.c

diff --git a/archive.c b/archive.c
index e6de0397cc82ae97018cbf4fc82d5697ec4d915d..c6aea8358f5b632ee11cb102c1ec1b6c2b317835 100644 (file)
--- a/archive.c
+++ b/archive.c
@@ -239,6 +239,19 @@ static void parse_treeish_arg(const char **argv,
        ar_args->time = archive_time;
 }
 
+static void create_output_file(const char *output_file)
+{
+       int output_fd = open(output_file, O_CREAT | O_WRONLY | O_TRUNC, 0666);
+       if (output_fd < 0)
+               die("could not create archive file: %s ", output_file);
+       if (output_fd != 1) {
+               if (dup2(output_fd, 1) < 0)
+                       die("could not redirect output");
+               else
+                       close(output_fd);
+       }
+}
+
 #define OPT__COMPR(s, v, h, p) \
        { OPTION_SET_INT, (s), NULL, (v), NULL, (h), \
          PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) }
@@ -253,6 +266,7 @@ 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;
@@ -262,6 +276,8 @@ static int parse_archive_args(int argc, const char **argv,
                OPT_STRING(0, "format", &format, "fmt", "archive format"),
                OPT_STRING(0, "prefix", &base, "prefix",
                        "prepend prefix to each pathname in the archive"),
+               OPT_STRING(0, "output", &output, "file",
+                       "write the archive to this file"),
                OPT__VERBOSE(&verbose),
                OPT__COMPR('0', &compression_level, "store only", 0),
                OPT__COMPR('1', &compression_level, "compress faster", 1),
@@ -294,6 +310,9 @@ static int parse_archive_args(int argc, const char **argv,
        if (!base)
                base = "";
 
+       if (output)
+               create_output_file(output);
+
        if (list) {
                for (i = 0; i < ARRAY_SIZE(archivers); i++)
                        printf("%s\n", archivers[i].name);