preload-index.h: move declarations for preload-index.c from elsewhere

We already have a preload-index.c file; move the declarations for the
functions in that file into a new preload-index.h.  These were
previously split between cache.h and repository.h.

Signed-off-by: Elijah Newren <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: newren

add-interactive.c

@@ -5,6 +5,7 @@
 #include "diffcore.h"
 #include "gettext.h"
 #include "hex.h"
+#include "preload-index.h"
 #include "revision.h"
 #include "refs.h"
 #include "string-list.h"

builtin/add.c

@@ -17,6 +17,7 @@
 #include "cache-tree.h"
 #include "run-command.h"
 #include "parse-options.h"
+#include "preload-index.h"
 #include "diff.h"
 #include "diffcore.h"
 #include "revision.h"

builtin/am.c

@@ -29,6 +29,7 @@
 #include "unpack-trees.h"
 #include "branch.h"
 #include "object-name.h"
+#include "preload-index.h"
 #include "sequencer.h"
 #include "revision.h"
 #include "merge-recursive.h"

builtin/checkout.c

@@ -20,6 +20,7 @@
 #include "object-name.h"
 #include "object-store.h"
 #include "parse-options.h"
+#include "preload-index.h"
 #include "refs.h"
 #include "remote.h"
 #include "resolve-undo.h"

builtin/commit.c

@@ -30,6 +30,7 @@
 #include "utf8.h"
 #include "object-name.h"
 #include "parse-options.h"
+#include "preload-index.h"
 #include "string-list.h"
 #include "rerere.h"
 #include "unpack-trees.h"

builtin/diff-files.c

@@ -8,6 +8,7 @@
 #include "diff.h"
 #include "diff-merges.h"
 #include "commit.h"
+#include "preload-index.h"
 #include "revision.h"
 #include "builtin.h"
 #include "submodule.h"

builtin/diff-index.c

@@ -3,6 +3,7 @@
 #include "diff.h"
 #include "diff-merges.h"
 #include "commit.h"
+#include "preload-index.h"
 #include "revision.h"
 #include "builtin.h"
 #include "setup.h"

builtin/diff.c

@@ -16,6 +16,7 @@
 #include "diff.h"
 #include "diff-merges.h"
 #include "diffcore.h"
+#include "preload-index.h"
 #include "revision.h"
 #include "log-tree.h"
 #include "builtin.h"

builtin/stash.c

@@ -17,6 +17,7 @@
 #include "run-command.h"
 #include "dir.h"
 #include "entry.h"
+#include "preload-index.h"
 #include "rerere.h"
 #include "revision.h"
 #include "setup.h"

builtin/submodule--helper.c

@@ -11,6 +11,7 @@
 #include "parse-options.h"
 #include "quote.h"
 #include "pathspec.h"
+#include "preload-index.h"
 #include "dir.h"
 #include "setup.h"
 #include "sparse-index.h"