format-patch: fix two-argument special case, and make it easier to pick single commits

diff --git a/commit-tree.c b/commit-tree.c
index e81e530fd4d5a118f814754455d36d83649b3124..b60299fed0442edec21f123e92774238d4533bea 100644 (file)
--- a/commit-tree.c
+++ b/commit-tree.c
@@ -5,10 +5,6 @@
  */
 #include "cache.h"
 
-#include <pwd.h>
-#include <time.h>
-#include <ctype.h>
-
 #define BLOCKING (1ul << 14)
 
 /*
@@ -45,39 +41,6 @@ static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
        memcpy(buf + size, one_line, len);
 }
 
-static void remove_special(char *p)
-{
-       char c;
-       char *dst = p, *src = p;
-
-       for (;;) {
-               c = *src;
-               src++;
-               switch(c) {
-               case '\n': case '<': case '>':
-                       continue;
-               }
-               *dst++ = c;
-               if (!c)
-                       break;
-       }
-
-       /*
-        * Go back, and remove crud from the end: some people
-        * have commas etc in their gecos field
-        */
-       dst--;
-       while (--dst >= p) {
-               unsigned char c = *dst;
-               switch (c) {
-               case ',': case ';': case '.':
-                       *dst = 0;
-                       continue;
-               }
-               break;
-       }
-}
-
 static void check_valid(unsigned char *sha1, const char *expect)
 {
        void *buf;
@@ -95,25 +58,36 @@ static void check_valid(unsigned char *sha1, const char *expect)
  * how multi-way merges are represented.
  */
 #define MAXPARENT (16)
+static unsigned char parent_sha1[MAXPARENT][20];
 
-static char *commit_tree_usage = "git-commit-tree <sha1> [-p <sha1>]* < changelog";
+static const char commit_tree_usage[] = "git-commit-tree <sha1> [-p <sha1>]* < changelog";
+
+static int new_parent(int idx)
+{
+       int i;
+       unsigned char *sha1 = parent_sha1[idx];
+       for (i = 0; i < idx; i++) {
+               if (!memcmp(parent_sha1[i], sha1, 20)) {
+                       error("duplicate parent %s ignored", sha1_to_hex(sha1));
+                       return 0;
+               }
+       }
+       return 1;
+}
 
 int main(int argc, char **argv)
 {
-       int i, len;
+       int i;
        int parents = 0;
        unsigned char tree_sha1[20];
-       unsigned char parent_sha1[MAXPARENT][20];
        unsigned char commit_sha1[20];
-       char *gecos, *realgecos, *commitgecos;
-       char *email, *commitemail, realemail[1000];
-       char date[20], realdate[20];
-       char *audate;
        char comment[1000];
-       struct passwd *pw;
        char *buffer;
        unsigned int size;
 
+       setup_ident();
+       git_config(git_default_config);
+
        if (argc < 2 || get_sha1_hex(argv[1], tree_sha1) < 0)
                usage(commit_tree_usage);
 
@@ -124,36 +98,11 @@ int main(int argc, char **argv)
                if (!b || strcmp(a, "-p") || get_sha1(b, parent_sha1[parents]))
                        usage(commit_tree_usage);
                check_valid(parent_sha1[parents], "commit");
-               parents++;
+               if (new_parent(parents))
+                       parents++;
        }
        if (!parents)
                fprintf(stderr, "Committing initial tree %s\n", argv[1]);
-       pw = getpwuid(getuid());
-       if (!pw)
-               die("You don't exist. Go away!");
-       realgecos = pw->pw_gecos;
-       len = strlen(pw->pw_name);
-       memcpy(realemail, pw->pw_name, len);
-       realemail[len] = '@';
-       gethostname(realemail+len+1, sizeof(realemail)-len-1);
-       if (!strchr(realemail+len+1, '.')) {
-               strcat(realemail, ".");
-               getdomainname(realemail+strlen(realemail), sizeof(realemail)-strlen(realemail)-1);
-       }
-
-       datestamp(realdate, sizeof(realdate));
-       strcpy(date, realdate);
-
-       commitgecos = gitenv("GIT_COMMITTER_NAME") ? : realgecos;
-       commitemail = gitenv("GIT_COMMITTER_EMAIL") ? : realemail;
-       gecos = gitenv("GIT_AUTHOR_NAME") ? : realgecos;
-       email = gitenv("GIT_AUTHOR_EMAIL") ? : realemail;
-       audate = gitenv("GIT_AUTHOR_DATE");
-       if (audate)
-               parse_date(audate, date, sizeof(date));
-
-       remove_special(gecos); remove_special(realgecos); remove_special(commitgecos);
-       remove_special(email); remove_special(realemail); remove_special(commitemail);
 
        init_buffer(&buffer, &size);
        add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));
@@ -167,8 +116,8 @@ int main(int argc, char **argv)
                add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));
 
        /* Person/date information */
-       add_buffer(&buffer, &size, "author %s <%s> %s\n", gecos, email, date);
-       add_buffer(&buffer, &size, "committer %s <%s> %s\n\n", commitgecos, commitemail, realdate);
+       add_buffer(&buffer, &size, "author %s\n", git_author_info());
+       add_buffer(&buffer, &size, "committer %s\n\n", git_committer_info());
 
        /* And add the comment */
        while (fgets(comment, sizeof(comment), stdin) != NULL)