First cut at libifying revlist generation

diff --git a/rev-parse.c b/rev-parse.c
index 507b531dce781133946da04cb27fa2ff6d3832a9..610eacb35a2ebc5b64b48ae02367543fa2fbb67a 100644 (file)
--- a/rev-parse.c
+++ b/rev-parse.c
@@ -20,6 +20,7 @@ static char *def = NULL;
 #define REVERSED 1
 static int show_type = NORMAL;
 static int symbolic = 0;
+static int abbrev = 0;
 static int output_sq = 0;
 
 static int revs_count = 0;
@@ -32,7 +33,9 @@ static int revs_count = 0;
 static int is_rev_argument(const char *arg)
 {
        static const char *rev_args[] = {
+               "--all",
                "--bisect",
+               "--dense",
                "--header",
                "--max-age=",
                "--max-count=",
@@ -40,15 +43,22 @@ static int is_rev_argument(const char *arg)
                "--min-age=",
                "--no-merges",
                "--objects",
+               "--objects-edge",
                "--parents",
                "--pretty",
                "--show-breaks",
+               "--sparse",
                "--topo-order",
+               "--date-order",
                "--unpacked",
                NULL
        };
        const char **p = rev_args;
 
+       /* accept -<digit>, like traditional "head" */
+       if ((*arg == '-') && isdigit(arg[1]))
+               return 1;
+
        for (;;) {
                const char *str = *p++;
                int len;
@@ -92,17 +102,22 @@ static void show_rev(int type, const unsigned char *sha1, const char *name)
                putchar('^');
        if (symbolic && name)
                show(name);
+       else if (abbrev)
+               show(find_unique_abbrev(sha1, abbrev));
        else
                show(sha1_to_hex(sha1));
 }
 
 /* Output a flag, only if filter allows it. */
-static void show_flag(char *arg)
+static int show_flag(char *arg)
 {
        if (!(filter & DO_FLAGS))
-               return;
-       if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV))
+               return 0;
+       if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
                show(arg);
+               return 1;
+       }
+       return 0;
 }
 
 static void show_default(void)
@@ -128,28 +143,25 @@ static int show_reference(const char *refname, const unsigned char *sha1)
 
 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;
+       snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
        show(buffer);
 }
 
+static int show_file(const char *arg)
+{
+       show_default();
+       if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
+               show(arg);
+               return 1;
+       }
+       return 0;
+}
+
 int main(int argc, char **argv)
 {
        int i, as_is = 0, verify = 0;
@@ -157,16 +169,35 @@ int main(int argc, char **argv)
        const char *prefix = setup_git_directory();
        
        for (i = 1; i < argc; i++) {
+               struct stat st;
                char *arg = argv[i];
                char *dotdot;
        
                if (as_is) {
-                       show(arg);
+                       show_file(arg);
+                       continue;
+               }
+               if (!strcmp(arg,"-n")) {
+                       if (++i >= argc)
+                               die("-n requires an argument");
+                       if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
+                               show(arg);
+                               show(argv[i]);
+                       }
+                       continue;
+               }
+               if (!strncmp(arg,"-n",2)) {
+                       if ((filter & DO_FLAGS) && (filter & DO_REVS))
+                               show(arg);
                        continue;
                }
+
                if (*arg == '-') {
                        if (!strcmp(arg, "--")) {
                                as_is = 1;
+                               /* Pass on the "--" if we show anything but files.. */
+                               if (filter & (DO_FLAGS | DO_REVS))
+                                       show_file(arg);
                                continue;
                        }
                        if (!strcmp(arg, "--default")) {
@@ -195,6 +226,19 @@ int main(int argc, char **argv)
                                verify = 1;
                                continue;
                        }
+                       if (!strcmp(arg, "--short") ||
+                           !strncmp(arg, "--short=", 8)) {
+                               filter &= ~(DO_FLAGS|DO_NOREV);
+                               verify = 1;
+                               abbrev = DEFAULT_ABBREV;
+                               if (arg[7] == '=')
+                                       abbrev = strtoul(arg + 8, NULL, 10);
+                               if (abbrev < MINIMUM_ABBREV)
+                                       abbrev = MINIMUM_ABBREV;
+                               else if (40 <= abbrev)
+                                       abbrev = 40;
+                               continue;
+                       }
                        if (!strcmp(arg, "--sq")) {
                                output_sq = 1;
                                continue;
@@ -216,6 +260,18 @@ int main(int argc, char **argv)
                                        puts(prefix);
                                continue;
                        }
+                       if (!strcmp(arg, "--show-cdup")) {
+                               const char *pfx = prefix;
+                               while (pfx) {
+                                       pfx = strchr(pfx, '/');
+                                       if (pfx) {
+                                               pfx++;
+                                               printf("../");
+                                       }
+                               }
+                               putchar('\n');
+                               continue;
+                       }
                        if (!strcmp(arg, "--git-dir")) {
                                const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
                                static char cwd[PATH_MAX];
@@ -248,9 +304,8 @@ int main(int argc, char **argv)
                                show_datestring("--min-age=", arg+8);
                                continue;
                        }
-                       if (verify)
+                       if (show_flag(arg) && verify)
                                die("Needed a single revision");
-                       show_flag(arg);
                        continue;
                }
 
@@ -279,11 +334,13 @@ int main(int argc, char **argv)
                        show_rev(REVERSED, sha1, arg+1);
                        continue;
                }
+               as_is = 1;
+               if (!show_file(arg))
+                       continue;
                if (verify)
                        die("Needed a single revision");
-               if ((filter & (DO_NONFLAGS|DO_NOREV)) ==
-                   (DO_NONFLAGS|DO_NOREV))
-                       show(arg);
+               if (lstat(arg, &st) < 0)
+                       die("'%s': %s", arg, strerror(errno));
        }
        show_default();
        if (verify && revs_count != 1)