Merge branch 'mg/rebase-i-onto-reflog-in-full'

diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index c27268ff30ab0e818b56f3e0a3ab56028083c6c1..0eca2d7bd0e6d620edc70b4f643a8911efbbc8ae 100644 (file)
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -11,6 +11,7 @@
 #include "parse-options.h"
 #include "diff.h"
 #include "userdiff.h"
+#include "streaming.h"
 
 #define BATCH 1
 #define BATCH_CHECK 2
@@ -127,6 +128,8 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
                        return cmd_ls_tree(2, ls_args, NULL);
                }
 
+               if (type == OBJ_BLOB)
+                       return stream_blob_to_fd(1, sha1, NULL, 0);
                buf = read_sha1_file(sha1, &type, &size);
                if (!buf)
                        die("Cannot read object %s", obj_name);
@@ -143,12 +146,34 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
                        die("git cat-file --textconv %s: <object> must be <sha1:path>",
                            obj_name);
 
-               if (!textconv_object(obj_context.path, obj_context.mode, sha1, &buf, &size))
+               if (!textconv_object(obj_context.path, obj_context.mode, sha1, 1, &buf, &size))
                        die("git cat-file --textconv: unable to run textconv on %s",
                            obj_name);
                break;
 
        case 0:
+               if (type_from_string(exp_type) == OBJ_BLOB) {
+                       unsigned char blob_sha1[20];
+                       if (sha1_object_info(sha1, NULL) == OBJ_TAG) {
+                               enum object_type type;
+                               unsigned long size;
+                               char *buffer = read_sha1_file(sha1, &type, &size);
+                               if (memcmp(buffer, "object ", 7) ||
+                                   get_sha1_hex(buffer + 7, blob_sha1))
+                                       die("%s not a valid tag", sha1_to_hex(sha1));
+                               free(buffer);
+                       } else
+                               hashcpy(blob_sha1, sha1);
+
+                       if (sha1_object_info(blob_sha1, NULL) == OBJ_BLOB)
+                               return stream_blob_to_fd(1, blob_sha1, NULL, 0);
+                       /*
+                        * we attempted to dereference a tag to a blob
+                        * and failed; there may be new dereference
+                        * mechanisms this code is not aware of.
+                        * fall-back to the usual case.
+                        */
+               }
                buf = read_object_with_reference(sha1, exp_type, &size, NULL);
                break;
 
@@ -226,14 +251,8 @@ static const char * const cat_file_usage[] = {
 
 static int git_cat_file_config(const char *var, const char *value, void *cb)
 {
-       switch (userdiff_config(var, value)) {
-       case 0:
-               break;
-       case -1:
+       if (userdiff_config(var, value) < 0)
                return -1;
-       default:
-               return 0;
-       }
 
        return git_default_config(var, value, cb);
 }