diff-files: -1/-2/-3 to diff against unmerged stage.
[gitweb.git] / ls-files.c
index c76e30e990c929bc381e5d022675f068a7650210..f3f1a6a6633881bf43887731fdcbe08af9ad2f4a 100644 (file)
@@ -9,6 +9,7 @@
 #include <fnmatch.h>
 
 #include "cache.h"
+#include "quote.h"
 
 static int show_deleted = 0;
 static int show_cached = 0;
@@ -16,20 +17,22 @@ static int show_others = 0;
 static int show_ignored = 0;
 static int show_stage = 0;
 static int show_unmerged = 0;
+static int show_modified = 0;
 static int show_killed = 0;
 static int line_terminator = '\n';
 
 static int prefix_len = 0, prefix_offset = 0;
 static const char *prefix = NULL;
-static const char *glob = NULL;
+static const char **pathspec = NULL;
 
 static const char *tag_cached = "";
 static const char *tag_unmerged = "";
 static const char *tag_removed = "";
 static const char *tag_other = "";
 static const char *tag_killed = "";
+static const char *tag_modified = "";
 
-static char *exclude_per_dir = NULL;
+static const char *exclude_per_dir = NULL;
 
 /* We maintain three exclude pattern lists:
  * EXC_CMDL lists patterns explicitly given on the command line.
@@ -94,7 +97,7 @@ static int add_excludes_from_file_1(const char *fname,
        for (i = 0; i < size; i++) {
                if (buf[i] == '\n') {
                        if (entry != buf + i && entry[0] != '#') {
-                               buf[i] = 0;
+                               buf[i - (i && buf[i-1] == '\r')] = 0;
                                add_exclude(entry, base, baselen, which);
                        }
                        entry = buf + i + 1;
@@ -302,6 +305,33 @@ static int cmp_name(const void *p1, const void *p2)
                                  e2->name, e2->len);
 }
 
+/*
+ * Match a pathspec against a filename. The first "len" characters
+ * are the common prefix
+ */
+static int match(const char **spec, const char *filename, int len)
+{
+       const char *m;
+
+       while ((m = *spec++) != NULL) {
+               int matchlen = strlen(m + len);
+
+               if (!matchlen)
+                       return 1;
+               if (!strncmp(m + len, filename + len, matchlen)) {
+                       if (m[len + matchlen - 1] == '/')
+                               return 1;
+                       switch (filename[len + matchlen]) {
+                       case '/': case '\0':
+                               return 1;
+                       }
+               }
+               if (!fnmatch(m + len, filename + len, 0))
+                       return 1;
+       }
+       return 0;
+}
+
 static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
 {
        int len = prefix_len;
@@ -310,10 +340,35 @@ static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
        if (len >= ent->len)
                die("git-ls-files: internal error - directory entry not superset of prefix");
 
-       if (glob && fnmatch(glob, ent->name + len, 0))
+       if (pathspec && !match(pathspec, ent->name, len))
                return;
 
-       printf("%s%s%c", tag, ent->name + offset, line_terminator);
+       fputs(tag, stdout);
+       write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
+       putchar(line_terminator);
+}
+
+static void show_other_files(void)
+{
+       int i;
+       for (i = 0; i < nr_dir; i++) {
+               /* We should not have a matching entry, but we
+                * may have an unmerged entry for this path.
+                */
+               struct nond_on_fs *ent = dir[i];
+               int pos = cache_name_pos(ent->name, ent->len);
+               struct cache_entry *ce;
+               if (0 <= pos)
+                       die("bug in show-other-files");
+               pos = -pos - 1;
+               if (pos < active_nr) { 
+                       ce = active_cache[pos];
+                       if (ce_namelen(ce) == ent->len &&
+                           !memcmp(ce->name, ent->name, ent->len))
+                               continue; /* Yup, this one exists unmerged */
+               }
+               show_dir_entry(tag_other, ent);
+       }
 }
 
 static void show_killed_files(void)
@@ -373,18 +428,25 @@ static void show_ce_entry(const char *tag, struct cache_entry *ce)
        if (len >= ce_namelen(ce))
                die("git-ls-files: internal error - cache entry not superset of prefix");
 
-       if (glob && fnmatch(glob, ce->name + len, 0))
+       if (pathspec && !match(pathspec, ce->name, len))
                return;
 
-       if (!show_stage)
-               printf("%s%s%c", tag, ce->name + offset, line_terminator);
-       else
-               printf("%s%06o %s %d\t%s%c",
+       if (!show_stage) {
+               fputs(tag, stdout);
+               write_name_quoted("", 0, ce->name + offset,
+                                 line_terminator, stdout);
+               putchar(line_terminator);
+       }
+       else {
+               printf("%s%06o %s %d\t",
                       tag,
                       ntohl(ce->ce_mode),
                       sha1_to_hex(ce->sha1),
-                      ce_stage(ce),
-                      ce->name + offset, line_terminator); 
+                      ce_stage(ce));
+               write_name_quoted("", 0, ce->name + offset,
+                                 line_terminator, stdout);
+               putchar(line_terminator);
+       }
 }
 
 static void show_files(void)
@@ -401,8 +463,7 @@ static void show_files(void)
                read_directory(path, base, baselen);
                qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
                if (show_others)
-                       for (i = 0; i < nr_dir; i++)
-                               show_dir_entry(tag_other, dir[i]);
+                       show_other_files();
                if (show_killed)
                        show_killed_files();
        }
@@ -416,15 +477,18 @@ static void show_files(void)
                        show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
                }
        }
-       if (show_deleted) {
+       if (show_deleted | show_modified) {
                for (i = 0; i < active_nr; i++) {
                        struct cache_entry *ce = active_cache[i];
                        struct stat st;
+                       int err;
                        if (excluded(ce->name) != show_ignored)
                                continue;
-                       if (!lstat(ce->name, &st))
-                               continue;
-                       show_ce_entry(tag_removed, ce);
+                       err = lstat(ce->name, &st);
+                       if (show_deleted && err)
+                               show_ce_entry(tag_removed, ce);
+                       if (show_modified && ce_modified(ce, &st))
+                               show_ce_entry(tag_modified, ce);
                }
        }
 }
@@ -455,55 +519,68 @@ static void prune_cache(void)
        active_nr = last;
 }
 
-/*
- * If the glob starts with a subdirectory, append it to
- * the prefix instead, for more efficient operation.
- *
- * But we do not update the "prefix_offset", which tells
- * how much of the name to ignore at printout.
- */
-static void extend_prefix(void)
+static void verify_pathspec(void)
 {
-       const char *p, *slash;
-       char c;
-
-       p = glob;
-       slash = NULL;
-       while ((c = *p++) != '\0') {
-               if (c == '*')
-                       break;
-               if (c == '/')
-                       slash = p;
+       const char **p, *n, *prev;
+       char *real_prefix;
+       unsigned long max;
+
+       prev = NULL;
+       max = PATH_MAX;
+       for (p = pathspec; (n = *p) != NULL; p++) {
+               int i, len = 0;
+               for (i = 0; i < max; i++) {
+                       char c = n[i];
+                       if (prev && prev[i] != c)
+                               break;
+                       if (!c || c == '*' || c == '?')
+                               break;
+                       if (c == '/')
+                               len = i+1;
+               }
+               prev = n;
+               if (len < max) {
+                       max = len;
+                       if (!max)
+                               break;
+               }
        }
-       if (slash) {
-               int len = slash - glob;
-               char *newprefix = xmalloc(len + prefix_len + 1);
-               memcpy(newprefix, prefix, prefix_len);
-               memcpy(newprefix + prefix_len, glob, len);
-               prefix_len += len;
-               newprefix[prefix_len] = 0;
-               prefix = newprefix;
-               glob = *slash ? slash : NULL;
+
+       if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
+               die("git-ls-files: cannot generate relative filenames containing '..'");
+
+       real_prefix = NULL;
+       prefix_len = max;
+       if (max) {
+               real_prefix = xmalloc(max + 1);
+               memcpy(real_prefix, prev, max);
+               real_prefix[max] = 0;
        }
+       prefix = real_prefix;
 }
 
 static const char ls_files_usage[] =
-       "git-ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged|killed])* "
+       "git-ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
        "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
-       "[ --exclude-per-directory=<filename> ]";
+       "[ --exclude-per-directory=<filename> ] [--] [<file>]*";
 
-int main(int argc, char **argv)
+int main(int argc, const char **argv)
 {
        int i;
        int exc_given = 0;
 
        prefix = setup_git_directory();
        if (prefix)
-               prefix_offset = prefix_len = strlen(prefix);
+               prefix_offset = strlen(prefix);
+       git_config(git_default_config);
 
        for (i = 1; i < argc; i++) {
-               char *arg = argv[i];
+               const char *arg = argv[i];
 
+               if (!strcmp(arg, "--")) {
+                       i++;
+                       break;
+               }
                if (!strcmp(arg, "-z")) {
                        line_terminator = 0;
                        continue;
@@ -512,6 +589,7 @@ int main(int argc, char **argv)
                        tag_cached = "H ";
                        tag_unmerged = "M ";
                        tag_removed = "R ";
+                       tag_modified = "C ";
                        tag_other = "? ";
                        tag_killed = "K ";
                        continue;
@@ -524,6 +602,10 @@ int main(int argc, char **argv)
                        show_deleted = 1;
                        continue;
                }
+               if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
+                       show_modified = 1;
+                       continue;
+               }
                if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
                        show_others = 1;
                        continue;
@@ -577,13 +659,16 @@ int main(int argc, char **argv)
                        prefix_offset = 0;
                        continue;
                }
-               if (glob || *arg == '-')
+               if (*arg == '-')
                        usage(ls_files_usage);
-               glob = arg;
+               break;
        }
 
-       if (glob)
-               extend_prefix();
+       pathspec = get_pathspec(prefix, argv + i);
+
+       /* Verify that the pathspec matches the prefix */
+       if (pathspec)
+               verify_pathspec();
 
        if (show_ignored && !exc_given) {
                fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
@@ -592,7 +677,8 @@ int main(int argc, char **argv)
        }
 
        /* With no flags, we default to showing the cached files */
-       if (!(show_stage | show_deleted | show_others | show_unmerged | show_killed))
+       if (!(show_stage | show_deleted | show_others | show_unmerged |
+             show_killed | show_modified))
                show_cached = 1;
 
        read_cache();