t3600: document failure of rm across symbolic links

diff --git a/refs.c b/refs.c
index 29628253087fb0d54a8f7a45938624527f35d4a8..e2b760d0baffd6db6b49e6014a58efa062f1a119 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -3,6 +3,7 @@
 #include "object.h"
 #include "tag.h"
 #include "dir.h"
+#include "string-list.h"
 
 /*
  * Make sure "ref" is something reasonable to have under ".git/refs/";
@@ -802,11 +803,38 @@ static const char *parse_ref_line(char *line, unsigned char *sha1)
        return line;
 }
 
+/*
+ * Read f, which is a packed-refs file, into dir.
+ *
+ * A comment line of the form "# pack-refs with: " may contain zero or
+ * more traits. We interpret the traits as follows:
+ *
+ *   No traits:
+ *
+ *      Probably no references are peeled. But if the file contains a
+ *      peeled value for a reference, we will use it.
+ *
+ *   peeled:
+ *
+ *      References under "refs/tags/", if they *can* be peeled, *are*
+ *      peeled in this file. References outside of "refs/tags/" are
+ *      probably not peeled even if they could have been, but if we find
+ *      a peeled value for such a reference we will use it.
+ *
+ *   fully-peeled:
+ *
+ *      All references in the file that can be peeled are peeled.
+ *      Inversely (and this is more important), any references in the
+ *      file for which no peeled value is recorded is not peelable. This
+ *      trait should typically be written alongside "peeled" for
+ *      compatibility with older clients, but we do not require it
+ *      (i.e., "peeled" is a no-op if "fully-peeled" is set).
+ */
 static void read_packed_refs(FILE *f, struct ref_dir *dir)
 {
        struct ref_entry *last = NULL;
        char refline[PATH_MAX];
-       int flag = REF_ISPACKED;
+       enum { PEELED_NONE, PEELED_TAGS, PEELED_FULLY } peeled = PEELED_NONE;
 
        while (fgets(refline, sizeof(refline), f)) {
                unsigned char sha1[20];
@@ -815,15 +843,20 @@ static void read_packed_refs(FILE *f, struct ref_dir *dir)
 
                if (!strncmp(refline, header, sizeof(header)-1)) {
                        const char *traits = refline + sizeof(header) - 1;
-                       if (strstr(traits, " peeled "))
-                               flag |= REF_KNOWS_PEELED;
+                       if (strstr(traits, " fully-peeled "))
+                               peeled = PEELED_FULLY;
+                       else if (strstr(traits, " peeled "))
+                               peeled = PEELED_TAGS;
                        /* perhaps other traits later as well */
                        continue;
                }
 
                refname = parse_ref_line(refline, sha1);
                if (refname) {
-                       last = create_ref_entry(refname, sha1, flag, 1);
+                       last = create_ref_entry(refname, sha1, REF_ISPACKED, 1);
+                       if (peeled == PEELED_FULLY ||
+                           (peeled == PEELED_TAGS && !prefixcmp(refname, "refs/tags/")))
+                               last->flag |= REF_KNOWS_PEELED;
                        add_ref(dir, last);
                        continue;
                }
@@ -831,8 +864,15 @@ static void read_packed_refs(FILE *f, struct ref_dir *dir)
                    refline[0] == '^' &&
                    strlen(refline) == 42 &&
                    refline[41] == '\n' &&
-                   !get_sha1_hex(refline + 1, sha1))
+                   !get_sha1_hex(refline + 1, sha1)) {
                        hashcpy(last->u.value.peeled, sha1);
+                       /*
+                        * Regardless of what the file header said,
+                        * we definitely know the value of *this*
+                        * reference:
+                        */
+                       last->flag |= REF_KNOWS_PEELED;
+               }
        }
 }
 
@@ -2554,3 +2594,46 @@ char *shorten_unambiguous_ref(const char *refname, int strict)
        free(short_name);
        return xstrdup(refname);
 }
+
+static struct string_list *hide_refs;
+
+int parse_hide_refs_config(const char *var, const char *value, const char *section)
+{
+       if (!strcmp("transfer.hiderefs", var) ||
+           /* NEEDSWORK: use parse_config_key() once both are merged */
+           (!prefixcmp(var, section) && var[strlen(section)] == '.' &&
+            !strcmp(var + strlen(section), ".hiderefs"))) {
+               char *ref;
+               int len;
+
+               if (!value)
+                       return config_error_nonbool(var);
+               ref = xstrdup(value);
+               len = strlen(ref);
+               while (len && ref[len - 1] == '/')
+                       ref[--len] = '\0';
+               if (!hide_refs) {
+                       hide_refs = xcalloc(1, sizeof(*hide_refs));
+                       hide_refs->strdup_strings = 1;
+               }
+               string_list_append(hide_refs, ref);
+       }
+       return 0;
+}
+
+int ref_is_hidden(const char *refname)
+{
+       struct string_list_item *item;
+
+       if (!hide_refs)
+               return 0;
+       for_each_string_list_item(item, hide_refs) {
+               int len;
+               if (prefixcmp(refname, item->string))
+                       continue;
+               len = strlen(item->string);
+               if (!refname[len] || refname[len] == '/')
+                       return 1;
+       }
+       return 0;
+}