cocci: apply "pending" index-compatibility to some "builtin/*.c"

Apply "index-compatibility.pending.cocci" rule to "builtin/*", but
exclude those where we conflict with in-flight changes.

As a result some of them end up using only "the_index", so let's have
them use the more narrow "USE_THE_INDEX_VARIABLE" rather than
"USE_THE_INDEX_COMPATIBILITY_MACROS".

Manual changes not made by coccinelle, that were squashed in:

* Whitespace-wrap argument lists for repo_hold_locked_index(),
  repo_read_index_preload() and repo_refresh_and_write_index(), in cases
  where the line became too long after the transformation.
* Change "refresh_cache()" to "refresh_index()" in a comment in
  "builtin/update-index.c".
* For those whose call was followed by perror("<macro-name>"), change
  it to perror("<function-name>"), referring to the new function.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/coccinelle/index-compatibility.cocci

@@ -26,11 +26,27 @@ identifier f != prepare_to_commit;
 (
 - read_cache_unmerged
 + repo_read_index_unmerged
+|
+- hold_locked_index
++ repo_hold_locked_index
 )
   (
 + the_repository,
   ...)
 
+// "the_repository" special-cases
+@@
+@@
+(
+- read_cache_preload
++ repo_read_index_preload
+)
+  (
++ the_repository,
+  ...
++ , 0
+  )
+
 // "the_index" simple cases
 @@
 @@
@@ -80,3 +96,40 @@ identifier f != prepare_to_commit;
   (
 + &the_index,
   ...)
+
+@@
+@@
+(
+- refresh_and_write_cache
++ repo_refresh_and_write_index
+)
+  (
++ the_repository,
+  ...
++ , NULL, NULL, NULL
+  )
+
+// "the_index" special-cases
+@@
+@@
+(
+- read_cache_from
++ read_index_from
+)
+  (
++ &the_index,
+  ...
++ , get_git_dir()
+  )
+
+@@
+@@
+(
+- refresh_cache
++ refresh_index
+)
+  (
++ &the_index,
+  ...
++ , NULL, NULL, NULL
+  )

contrib/coccinelle/index-compatibility.pending.cocci

@@ -4,9 +4,6 @@
 (
 - read_cache
 + repo_read_index
-|
-- hold_locked_index
-+ repo_hold_locked_index
 )
   (
 + the_repository,
@@ -25,54 +22,3 @@
   (
 + &the_index,
   ...)
-
-// "the_repository" special-cases
-@@
-@@
-(
-- read_cache_preload
-+ repo_read_index_preload
-)
-  (
-+ the_repository,
-  ...
-+ , 0
-  )
-
-@@
-@@
-(
-- refresh_and_write_cache
-+ repo_refresh_and_write_index
-)
-  (
-+ the_repository,
-  ...
-+ , NULL, NULL, NULL
-  )
-
-
-// "the_index" special-cases
-@@
-@@
-(
-- read_cache_from
-+ read_index_from
-)
-  (
-+ &the_index,
-  ...
-+ , get_git_dir()
-  )
-
-@@
-@@
-(
-- refresh_cache
-+ refresh_index
-)
-  (
-+ &the_index,
-  ...
-+ , NULL, NULL, NULL
-  )