Adapt tutorial to cygwin and add test case

diff --git a/rev-parse.c b/rev-parse.c
index 6d723f902aaff806431d5e47916dadba7af18a37..41b9dae429d2b423f57af4f4e091accfd9697022 100644 (file)
--- a/rev-parse.c
+++ b/rev-parse.c
@@ -6,6 +6,7 @@
 #include "cache.h"
 #include "commit.h"
 #include "refs.h"
+#include "quote.h"
 
 #define DO_REVS                1
 #define DO_NOREV       2
@@ -31,6 +32,7 @@ static int revs_count = 0;
 static int is_rev_argument(const char *arg)
 {
        static const char *rev_args[] = {
+               "--all",
                "--bisect",
                "--header",
                "--max-age=",
@@ -125,6 +127,30 @@ static int show_reference(const char *refname, const unsigned char *sha1)
        return 0;
 }
 
+static void show_datestring(const char *flag, const char *datestr)
+{
+       FILE *date;
+       static char buffer[100];
+       static char cmd[1000];
+       int len;
+
+       /* date handling requires both flags and revs */
+       if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
+               return;
+       len = strlen(flag);
+       memcpy(buffer, flag, len);
+
+       snprintf(cmd, sizeof(cmd), "date --date=%s +%%s", sq_quote(datestr));
+       date = popen(cmd, "r");
+       if (!date || !fgets(buffer + len, sizeof(buffer) - len, date))
+               die("git-rev-list: bad date string");
+       pclose(date);
+       len = strlen(buffer);
+       if (buffer[len-1] == '\n')
+               buffer[--len] = 0;
+       show(buffer);
+}
+
 int main(int argc, char **argv)
 {
        int i, as_is = 0, verify = 0;
@@ -191,6 +217,38 @@ int main(int argc, char **argv)
                                        puts(prefix);
                                continue;
                        }
+                       if (!strcmp(arg, "--git-dir")) {
+                               const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
+                               static char cwd[PATH_MAX];
+                               if (gitdir) {
+                                       puts(gitdir);
+                                       continue;
+                               }
+                               if (!prefix) {
+                                       puts(".git");
+                                       continue;
+                               }
+                               if (!getcwd(cwd, PATH_MAX))
+                                       die("unable to get current working directory");
+                               printf("%s/.git\n", cwd);
+                               continue;
+                       }
+                       if (!strncmp(arg, "--since=", 8)) {
+                               show_datestring("--max-age=", arg+8);
+                               continue;
+                       }
+                       if (!strncmp(arg, "--after=", 8)) {
+                               show_datestring("--max-age=", arg+8);
+                               continue;
+                       }
+                       if (!strncmp(arg, "--before=", 9)) {
+                               show_datestring("--min-age=", arg+9);
+                               continue;
+                       }
+                       if (!strncmp(arg, "--until=", 8)) {
+                               show_datestring("--min-age=", arg+8);
+                               continue;
+                       }
                        if (verify)
                                die("Needed a single revision");
                        show_flag(arg);