rev-list: allow -<n> as shorthand for --max-count=<n>

This builds on top of the previous one.

Traditionally, head(1) and tail(1) allow their line limits to be
parsed this way.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/rev-list.c b/rev-list.c
index 4565755..1bc1887 100644 (file)
--- a/rev-list.c
+++ b/rev-list.c
@@ -749,6 +749,11 @@ int main(int argc, const char **argv)
                struct commit *commit;
                unsigned char sha1[20];
 
+               /* accept -<digit>, like traditilnal "head" */
+               if ((*arg == '-') && isdigit(arg[1])) {
+                       max_count = atoi(arg + 1);
+                       continue;
+               }
                if (!strcmp(arg, "-n")) {
                        if (++i >= argc)
                                die("-n requires an argument");

diff --git a/rev-parse.c b/rev-parse.c
index 3c99a79..6bf205a 100644 (file)
--- a/rev-parse.c
+++ b/rev-parse.c
@@ -53,6 +53,10 @@ static int is_rev_argument(const char *arg)
        };
        const char **p = rev_args;
 
+       /* accept -<digit>, like traditional "head" */
+       if ((*arg == '-') && isdigit(arg[1]))
+               return 1;
+
        for (;;) {
                const char *str = *p++;
                int len;