object.h: stop depending on cache.h; make cache.h depend on object.h

Things should be able to depend on object.h without pulling in all of
cache.h.  Move an enum to allow this.

Note that a couple files previously depended on things brought in
through cache.h indirectly (revision.h -> commit.h -> object.h ->
cache.h).  As such, this change requires making existing dependencies
more explicit in half a dozen files.  The inclusion of strbuf.h in
some headers if of particular note: these headers directly embedded a
strbuf in some new structs, meaning they should have been including
strbuf.h all along but were indirectly getting the necessary
definitions.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

alloc.c

@@ -8,7 +8,7 @@
  * up with maximal alignment because it doesn't know what the object alignment
  * for the new allocation is.
  */
-#include "cache.h"
+#include "git-compat-util.h"
 #include "object.h"
 #include "blob.h"
 #include "tree.h"

blame.h

@@ -1,7 +1,6 @@
 #ifndef BLAME_H
 #define BLAME_H
 
-#include "cache.h"
 #include "commit.h"
 #include "xdiff-interface.h"
 #include "revision.h"

blob.c

@@ -1,4 +1,4 @@
-#include "cache.h"
+#include "git-compat-util.h"
 #include "blob.h"
 #include "repository.h"
 #include "alloc.h"

cache-tree.h

@@ -1,7 +1,6 @@
 #ifndef CACHE_TREE_H
 #define CACHE_TREE_H
 
-#include "cache.h"
 #include "tree.h"
 #include "tree-walk.h"
 

cache.h

@@ -14,6 +14,7 @@
 #include "pack-revindex.h"
 #include "hash.h"
 #include "path.h"
+#include "object.h"
 #include "oid-array.h"
 #include "repository.h"
 #include "mem-pool.h"
@@ -453,26 +454,6 @@ void prefetch_cache_entries(const struct index_state *istate,
 extern struct index_state the_index;
 #endif
 
-#define TYPE_BITS 3
-
-/*
- * Values in this enum (except those outside the 3 bit range) are part
- * of pack file format. See gitformat-pack(5) for more information.
- */
-enum object_type {
-	OBJ_BAD = -1,
-	OBJ_NONE = 0,
-	OBJ_COMMIT = 1,
-	OBJ_TREE = 2,
-	OBJ_BLOB = 3,
-	OBJ_TAG = 4,
-	/* 5 for future expansion */
-	OBJ_OFS_DELTA = 6,
-	OBJ_REF_DELTA = 7,
-	OBJ_ANY,
-	OBJ_MAX
-};
-
 static inline enum object_type object_type(unsigned int mode)
 {
 	return S_ISDIR(mode) ? OBJ_TREE :

diff-merges.c

@@ -1,6 +1,7 @@
 #include "git-compat-util.h"
 #include "diff-merges.h"
 
+#include "gettext.h"
 #include "revision.h"
 
 typedef void (*diff_merges_setup_func_t)(struct rev_info *);

diff.h

@@ -8,6 +8,7 @@
 #include "pathspec.h"
 #include "object.h"
 #include "oidset.h"
+#include "strbuf.h"
 
 /**
  * The diff API is for programs that compare two sets of files (e.g. two trees,
@@ -71,7 +72,6 @@ struct oid_array;
 struct option;
 struct repository;
 struct rev_info;
-struct strbuf;
 struct userdiff_driver;
 
 typedef int (*pathchange_fn_t)(struct diff_options *options,

diffcore-delta.c

@@ -1,4 +1,4 @@
-#include "cache.h"
+#include "git-compat-util.h"
 #include "diff.h"
 #include "diffcore.h"
 

fsck.h

@@ -1,6 +1,7 @@
 #ifndef GIT_FSCK_H
 #define GIT_FSCK_H
 
+#include "object.h"
 #include "oidset.h"
 
 enum fsck_msg_type {

help.c

@@ -5,6 +5,7 @@
 #include "exec-cmd.h"
 #include "run-command.h"
 #include "levenshtein.h"
+#include "gettext.h"
 #include "help.h"
 #include "command-list.h"
 #include "string-list.h"

list-objects-filter-options.h

@@ -1,9 +1,10 @@
 #ifndef LIST_OBJECTS_FILTER_OPTIONS_H
 #define LIST_OBJECTS_FILTER_OPTIONS_H
 
-#include "cache.h"
+#include "object.h"
 #include "parse-options.h"
 #include "string-list.h"
+#include "strbuf.h"
 
 /*
  * The list of defined filters for list-objects.

negotiator/noop.c

@@ -1,4 +1,4 @@
-#include "cache.h"
+#include "git-compat-util.h"
 #include "noop.h"
 #include "../commit.h"
 #include "../fetch-negotiator.h"

object.h

@@ -1,7 +1,7 @@
 #ifndef OBJECT_H
 #define OBJECT_H
 
-#include "cache.h"
+#include "hash.h"
 
 struct buffer_slab;
 
@@ -81,6 +81,26 @@ struct object_array {
  */
 #define FLAG_BITS  28
 
+#define TYPE_BITS 3
+
+/*
+ * Values in this enum (except those outside the 3 bit range) are part
+ * of pack file format. See gitformat-pack(5) for more information.
+ */
+enum object_type {
+	OBJ_BAD = -1,
+	OBJ_NONE = 0,
+	OBJ_COMMIT = 1,
+	OBJ_TREE = 2,
+	OBJ_BLOB = 3,
+	OBJ_TAG = 4,
+	/* 5 for future expansion */
+	OBJ_OFS_DELTA = 6,
+	OBJ_REF_DELTA = 7,
+	OBJ_ANY,
+	OBJ_MAX
+};
+
 /*
  * The object type is stored in 3 bits.
  */

shallow.h

@@ -6,6 +6,8 @@
 #include "repository.h"
 #include "strbuf.h"
 
+struct oid_array;
+
 void set_alternate_shallow_file(struct repository *r, const char *path, int override);
 int register_shallow(struct repository *r, const struct object_id *oid);
 int unregister_shallow(const struct object_id *oid);

t/helper/test-bloom.c

@@ -1,4 +1,4 @@
-#include "git-compat-util.h"
+#include "cache.h"
 #include "bloom.h"
 #include "hex.h"
 #include "test-tool.h"

t/helper/test-example-decorate.c

@@ -1,5 +1,5 @@
 #include "test-tool.h"
-#include "cache.h"
+#include "git-compat-util.h"
 #include "object.h"
 #include "decorate.h"
 

worktree.h

@@ -1,7 +1,6 @@
 #ifndef WORKTREE_H
 #define WORKTREE_H
 
-#include "cache.h"
 #include "refs.h"
 
 struct strbuf;