Merge branch 'ps/use-the-repository'

A CPP macro USE_THE_REPOSITORY_VARIABLE is introduced to help
transition the codebase to rely less on the availability of the
singleton the_repository instance.

* ps/use-the-repository:
  hex: guard declarations with `USE_THE_REPOSITORY_VARIABLE`
  t/helper: remove dependency on `the_repository` in "proc-receive"
  t/helper: fix segfault in "oid-array" command without repository
  t/helper: use correct object hash in partial-clone helper
  compat/fsmonitor: fix socket path in networked SHA256 repos
  replace-object: use hash algorithm from passed-in repository
  protocol-caps: use hash algorithm from passed-in repository
  oidset: pass hash algorithm when parsing file
  http-fetch: don't crash when parsing packfile without a repo
  hash-ll: merge with "hash.h"
  refs: avoid include cycle with "repository.h"
  global: introduce `USE_THE_REPOSITORY_VARIABLE` macro
  hash: require hash algorithm in `empty_tree_oid_hex()`
  hash: require hash algorithm in `is_empty_{blob,tree}_oid()`
  hash: make `is_null_oid()` independent of `the_repository`
  hash: convert `oidcmp()` and `oideq()` to compare whole hash
  global: ensure that object IDs are always padded
  hash: require hash algorithm in `oidread()` and `oidclr()`
  hash: require hash algorithm in `hasheq()`, `hashcmp()` and `hashclr()`
  hash: drop (mostly) unused `is_empty_{blob,tree}_sha1()` functions

Author: gitster

add-interactive.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "add-interactive.h"
 #include "color.h"
@@ -557,7 +559,7 @@ static int get_modified_files(struct repository *r,
 		s.skip_unseen = filter && i;
 
 		opt.def = is_initial ?
-			empty_tree_oid_hex() : oid_to_hex(&head_oid);
+			empty_tree_oid_hex(the_repository->hash_algo) : oid_to_hex(&head_oid);
 
 		repo_init_revisions(r, &rev, NULL);
 		setup_revisions(0, NULL, &rev, &opt);

add-patch.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "add-interactive.h"
 #include "advice.h"
@@ -421,7 +423,7 @@ static int parse_diff(struct add_p_state *s, const struct pathspec *ps)
 			    /* could be on an unborn branch */
 			    !strcmp("HEAD", s->revision) &&
 			    repo_get_oid(the_repository, "HEAD", &oid) ?
-			    empty_tree_oid_hex() : s->revision);
+			    empty_tree_oid_hex(the_repository->hash_algo) : s->revision);
 	}
 	color_arg_index = args.nr;
 	/* Use `--no-color` explicitly, just in case `diff.color = always`. */

apply.c

@@ -7,6 +7,8 @@
  *
  */
 
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "abspath.h"
 #include "base85.h"
@@ -3680,7 +3682,7 @@ static int try_threeway(struct apply_state *state,
 	if (status) {
 		patch->conflicted_threeway = 1;
 		if (patch->is_new)
-			oidclr(&patch->threeway_stage[0]);
+			oidclr(&patch->threeway_stage[0], the_repository->hash_algo);
 		else
 			oidcpy(&patch->threeway_stage[0], &pre_oid);
 		oidcpy(&patch->threeway_stage[1], &our_oid);

apply.h

@@ -1,7 +1,7 @@
 #ifndef APPLY_H
 #define APPLY_H
 
-#include "hash-ll.h"
+#include "hash.h"
 #include "lockfile.h"
 #include "string-list.h"
 #include "strmap.h"

archive-tar.c

@@ -1,6 +1,9 @@
 /*
  * Copyright (c) 2005, 2006 Rene Scharfe
  */
+
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "config.h"
 #include "gettext.h"

archive-zip.c

@@ -1,6 +1,9 @@
 /*
  * Copyright (c) 2006 Rene Scharfe
  */
+
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "config.h"
 #include "archive.h"

archive.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "abspath.h"
 #include "config.h"

attr.c

@@ -6,6 +6,8 @@
  * an insanely large number of attributes.
  */
 
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "config.h"
 #include "environment.h"

bisect.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "config.h"
 #include "commit.h"

blame.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "refs.h"
 #include "object-store-ll.h"
@@ -1246,7 +1248,7 @@ static int fill_blob_sha1_and_mode(struct repository *r,
 		goto error_out;
 	return 0;
  error_out:
-	oidclr(&origin->blob_oid);
+	oidclr(&origin->blob_oid, the_repository->hash_algo);
 	origin->mode = S_IFINVALID;
 	return -1;
 }