Merge branch 'sparse-index-stuff'

This is random stuff that probably all got upstream in the meantime.

Author: dscho

Documentation/config/index.adoc

@@ -1,3 +1,9 @@
+index.deleteSparseDirectories::
+	When enabled, the cone mode sparse-checkout feature will delete
+	directories that are outside of the sparse-checkout cone, unless
+	such a directory contains an untracked, non-ignored file. Defaults
+	to true.
+
 index.recordEndOfIndexEntries::
 	Specifies whether the index file should include an "End Of Index
 	Entry" section. This reduces index load time on multiprocessor

builtin/add.c

@@ -1,10 +1,13 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 /*
  * "git add" builtin command
  *
  * Copyright (C) 2006 Linus Torvalds
  */
 
 #include "builtin.h"
+#include "environment.h"
 #include "advice.h"
 #include "config.h"
 #include "environment.h"
@@ -49,6 +52,7 @@ static int chmod_pathspec(struct repository *repo,
 		int err;
 
 		if (!include_sparse &&
+		    !core_virtualfilesystem &&
 		    (ce_skip_worktree(ce) ||
 		     !path_in_sparse_checkout(ce->name, repo->index)))
 			continue;
@@ -134,8 +138,9 @@ static int refresh(struct repository *repo, int verbose, const struct pathspec *
 		if (!seen[i]) {
 			const char *path = pathspec->items[i].original;
 
-			if (matches_skip_worktree(pathspec, i, &skip_worktree_seen) ||
-			    !path_in_sparse_checkout(path, repo->index)) {
+			if (!core_virtualfilesystem &&
+			    (matches_skip_worktree(pathspec, i, &skip_worktree_seen) ||
+			     !path_in_sparse_checkout(path, repo->index))) {
 				string_list_append(&only_match_skip_worktree,
 						   pathspec->items[i].original);
 			} else {
@@ -145,7 +150,11 @@ static int refresh(struct repository *repo, int verbose, const struct pathspec *
 		}
 	}
 
-	if (only_match_skip_worktree.nr) {
+	/*
+	 * When using a virtual filesystem, we might re-add a path
+	 * that is currently virtual and we want that to succeed.
+	 */
+	if (!core_virtualfilesystem && only_match_skip_worktree.nr) {
 		advise_on_updating_sparse_paths(&only_match_skip_worktree);
 		ret = 1;
 	}
@@ -543,7 +552,11 @@ int cmd_add(int argc,
 			if (seen[i])
 				continue;
 
-			if (!include_sparse &&
+			/*
+			 * When using a virtual filesystem, we might re-add a path
+			 * that is currently virtual and we want that to succeed.
+			 */
+			if (!include_sparse && !core_virtualfilesystem &&
 			    matches_skip_worktree(&pathspec, i, &skip_worktree_seen)) {
 				string_list_append(&only_match_skip_worktree,
 						   pathspec.items[i].original);
@@ -567,7 +580,6 @@ int cmd_add(int argc,
 			}
 		}
 
-
 		if (only_match_skip_worktree.nr) {
 			advise_on_updating_sparse_paths(&only_match_skip_worktree);
 			exit_status = 1;

builtin/reset.c

@@ -40,6 +40,8 @@
 #include "add-interactive.h"
 #include "strbuf.h"
 #include "quote.h"
+#include "dir.h"
+#include "entry.h"
 
 #define REFRESH_INDEX_DELAY_WARNING_IN_MS (2 * 1000)
 
@@ -160,9 +162,48 @@ static void update_index_from_diff(struct diff_queue_struct *q,
 
 	for (i = 0; i < q->nr; i++) {
 		int pos;
+		int respect_skip_worktree = 1;
 		struct diff_filespec *one = q->queue[i]->one;
+		struct diff_filespec *two = q->queue[i]->two;
 		int is_in_reset_tree = one->mode && !is_null_oid(&one->oid);
+		int is_missing = !(one->mode && !is_null_oid(&one->oid));
+		int was_missing = !two->mode && is_null_oid(&two->oid);
 		struct cache_entry *ce;
+		struct cache_entry *ceBefore;
+		struct checkout state = CHECKOUT_INIT;
+
+		/*
+		 * When using the virtual filesystem feature, the cache entries that are
+		 * added here will not have the skip-worktree bit set.
+		 *
+		 * Without this code there is data that is lost because the files that
+		 * would normally be in the working directory are not there and show as
+		 * deleted for the next status or in the case of added files just disappear.
+		 * We need to create the previous version of the files in the working
+		 * directory so that they will have the right content and the next
+		 * status call will show modified or untracked files correctly.
+		 */
+		if (core_virtualfilesystem && !file_exists(two->path))
+		{
+			respect_skip_worktree = 0;
+			pos = index_name_pos(the_repository->index, two->path, strlen(two->path));
+
+			if ((pos >= 0 && ce_skip_worktree(the_repository->index->cache[pos])) &&
+			    (is_missing || !was_missing))
+			{
+				state.force = 1;
+				state.refresh_cache = 1;
+				state.istate = the_repository->index;
+				ceBefore = make_cache_entry(the_repository->index, two->mode,
+							    &two->oid, two->path,
+							    0, 0);
+				if (!ceBefore)
+					die(_("make_cache_entry failed for path '%s'"),
+						two->path);
+
+				checkout_entry(ceBefore, &state, NULL, NULL);
+			}
+		}
 
 		if (!is_in_reset_tree && !intent_to_add) {
 			remove_file_from_index(the_repository->index, one->path);
@@ -181,8 +222,14 @@ static void update_index_from_diff(struct diff_queue_struct *q,
 		 * to properly construct the reset sparse directory.
 		 */
 		pos = index_name_pos(the_repository->index, one->path, strlen(one->path));
-		if ((pos >= 0 && ce_skip_worktree(the_repository->index->cache[pos])) ||
-		    (pos < 0 && !path_in_sparse_checkout(one->path, the_repository->index)))
+
+		/*
+		 * Do not add the SKIP_WORKTREE bit back if we populated the
+		 * file on purpose in a virtual filesystem scenario.
+		 */
+		if (respect_skip_worktree &&
+		    ((pos >= 0 && ce_skip_worktree(the_repository->index->cache[pos])) ||
+		     (pos < 0 && !path_in_sparse_checkout(one->path, the_repository->index))))
 			ce->ce_flags |= CE_SKIP_WORKTREE;
 
 		if (!ce)

builtin/rm.c

@@ -7,6 +7,7 @@
 #define USE_THE_REPOSITORY_VARIABLE
 
 #include "builtin.h"
+#include "environment.h"
 #include "advice.h"
 #include "config.h"
 #include "environment.h"
@@ -315,7 +316,7 @@ int cmd_rm(int argc,
 	for (unsigned int i = 0; i < the_repository->index->cache_nr; i++) {
 		const struct cache_entry *ce = the_repository->index->cache[i];
 
-		if (!include_sparse &&
+		if (!include_sparse && !core_virtualfilesystem &&
 		    (ce_skip_worktree(ce) ||
 		     !path_in_sparse_checkout(ce->name, the_repository->index)))
 			continue;
@@ -352,7 +353,11 @@ int cmd_rm(int argc,
 				    *original ? original : ".");
 		}
 
-		if (only_match_skip_worktree.nr) {
+		/*
+		 * When using a virtual filesystem, we might re-add a path
+		 * that is currently virtual and we want that to succeed.
+		 */
+		if (!core_virtualfilesystem && only_match_skip_worktree.nr) {
 			advise_on_updating_sparse_paths(&only_match_skip_worktree);
 			ret = 1;
 		}

builtin/sparse-checkout.c

@@ -112,7 +112,7 @@ static int sparse_checkout_list(int argc, const char **argv, const char *prefix,
 
 static void clean_tracked_sparse_directories(struct repository *r)
 {
-	int i, was_full = 0;
+	int i, value, was_full = 0;
 	struct strbuf path = STRBUF_INIT;
 	size_t pathlen;
 	struct string_list_item *item;
@@ -128,6 +128,13 @@ static void clean_tracked_sparse_directories(struct repository *r)
 	    !r->index->sparse_checkout_patterns->use_cone_patterns)
 		return;
 
+	/*
+	 * Users can disable this behavior.
+	 */
+	if (!repo_config_get_bool(r, "index.deletesparsedirectories", &value) &&
+	    !value)
+		return;
+
 	/*
 	 * Use the sparse index as a data structure to assist finding
 	 * directories that are safe to delete. This conversion to a

diff.c

@@ -4046,6 +4046,13 @@ static int reuse_worktree_file(struct index_state *istate,
 	    has_object_pack(istate->repo, oid))
 		return 0;
 
+	/*
+	 * If this path does not match our sparse-checkout definition,
+	 * then the file will not be in the working directory.
+	 */
+	if (!path_in_sparse_checkout(name, istate))
+		return 0;
+
 	/*
 	 * Similarly, if we'd have to convert the file contents anyway, that
 	 * makes the optimization not worthwhile.

dir.c

@@ -1601,6 +1601,13 @@ static int path_in_sparse_checkout_1(const char *path,
 	enum pattern_match_result match = UNDECIDED;
 	const char *end, *slash;
 
+	/*
+	 * When using a virtual filesystem, there aren't really patterns
+	 * to follow, but be extra careful to skip this check.
+	 */
+	if (core_virtualfilesystem)
+		return 1;
+
 	/*
 	 * We default to accepting a path if the path is empty, there are no
 	 * patterns, or the patterns are of the wrong type.

read-cache.c

@@ -3954,7 +3954,7 @@ static void update_callback(struct diff_queue_struct *q,
 		struct diff_filepair *p = q->queue[i];
 		const char *path = p->one->path;
 
-		if (!data->include_sparse &&
+		if (!data->include_sparse && !core_virtualfilesystem &&
 		    !path_in_sparse_checkout(path, data->index))
 			continue;
 

repo-settings.c

@@ -78,7 +78,7 @@ void prepare_repo_settings(struct repository *r)
 	repo_cfg_bool(r, "pack.usesparse", &r->settings.pack_use_sparse, 1);
 	repo_cfg_bool(r, "pack.usepathwalk", &r->settings.pack_use_path_walk, 0);
 	repo_cfg_bool(r, "core.multipackindex", &r->settings.core_multi_pack_index, 1);
-	repo_cfg_bool(r, "index.sparse", &r->settings.sparse_index, 0);
+	repo_cfg_bool(r, "index.sparse", &r->settings.sparse_index, 1);
 	repo_cfg_bool(r, "index.skiphash", &r->settings.index_skip_hash, r->settings.index_skip_hash);
 	repo_cfg_bool(r, "pack.readreverseindex", &r->settings.pack_read_reverse_index, 1);
 	repo_cfg_bool(r, "pack.usebitmapboundarytraversal",

sequencer.c

@@ -765,7 +765,7 @@ static int do_recursive_merge(struct repository *r,
 	o.branch2 = next ? next_label : "(empty tree)";
 	if (is_rebase_i(opts))
 		o.buffer_output = 2;
-	o.show_rename_progress = 1;
+	o.show_rename_progress = isatty(2);
 
 	head_tree = parse_tree_indirect(head);
 	if (!head_tree)