dir: fix confusion based on variable tense

Despite having contributed several fixes in this area, I have for months
(years?) assumed that the "exclude" variable was a directive; this
caused me to think of it as a different mode we operate in and left me
confused as I tried to build up a mental model around why we'd need such
a directive.  I mostly tried to ignore it while focusing on the pieces I
was trying to understand.

Then I finally traced this variable all back to a call to is_excluded(),
meaning it was actually functioning as an adjective.  In particular, it
was a checked property ("Does this path match a rule in .gitignore?"),
rather than a mode passed in from the caller.  Change the variable name
to match the part of speech used by the function called to define it,
which will hopefully make these bits of code slightly clearer to the
next reader.

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

Author: newren

dir.c

@@ -1656,7 +1656,7 @@ static enum exist_status directory_exists_in_index(struct index_state *istate,
 static enum path_treatment treat_directory(struct dir_struct *dir,
 	struct index_state *istate,
 	struct untracked_cache_dir *untracked,
-	const char *dirname, int len, int baselen, int exclude,
+	const char *dirname, int len, int baselen, int excluded,
 	const struct pathspec *pathspec)
 {
 	int nested_repo = 0;
@@ -1679,13 +1679,13 @@ static enum path_treatment treat_directory(struct dir_struct *dir,
 		}
 		if (nested_repo)
 			return ((dir->flags & DIR_SKIP_NESTED_GIT) ? path_none :
-				(exclude ? path_excluded : path_untracked));
+				(excluded ? path_excluded : path_untracked));
 
 		if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
 			break;
-		if (exclude &&
-			(dir->flags & DIR_SHOW_IGNORED_TOO) &&
-			(dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING)) {
+		if (excluded &&
+		    (dir->flags & DIR_SHOW_IGNORED_TOO) &&
+		    (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING)) {
 
 			/*
 			 * This is an excluded directory and we are
@@ -1713,7 +1713,7 @@ static enum path_treatment treat_directory(struct dir_struct *dir,
 	/* This is the "show_other_directories" case */
 
 	if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
-		return exclude ? path_excluded : path_untracked;
+		return excluded ? path_excluded : path_untracked;
 
 	untracked = lookup_untracked(dir->untracked, untracked,
 				     dirname + baselen, len - baselen);
@@ -1723,7 +1723,7 @@ static enum path_treatment treat_directory(struct dir_struct *dir,
 	 * the directory contains any files.
 	 */
 	return read_directory_recursive(dir, istate, dirname, len,
-					untracked, 1, exclude, pathspec);
+					untracked, 1, excluded, pathspec);
 }
 
 /*
@@ -1904,7 +1904,7 @@ static enum path_treatment treat_path(struct dir_struct *dir,
 				      int baselen,
 				      const struct pathspec *pathspec)
 {
-	int has_path_in_index, dtype, exclude;
+	int has_path_in_index, dtype, excluded;
 	enum path_treatment path_treatment;
 
 	if (!cdir->d_name)
@@ -1949,13 +1949,13 @@ static enum path_treatment treat_path(struct dir_struct *dir,
 	    (directory_exists_in_index(istate, path->buf, path->len) == index_nonexistent))
 		return path_none;
 
-	exclude = is_excluded(dir, istate, path->buf, &dtype);
+	excluded = is_excluded(dir, istate, path->buf, &dtype);
 
 	/*
 	 * Excluded? If we don't explicitly want to show
 	 * ignored files, ignore it
 	 */
-	if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
+	if (excluded && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
 		return path_excluded;
 
 	switch (dtype) {
@@ -1965,7 +1965,7 @@ static enum path_treatment treat_path(struct dir_struct *dir,
 		strbuf_addch(path, '/');
 		path_treatment = treat_directory(dir, istate, untracked,
 						 path->buf, path->len,
-						 baselen, exclude, pathspec);
+						 baselen, excluded, pathspec);
 		/*
 		 * If 1) we only want to return directories that
 		 * match an exclude pattern and 2) this directory does
@@ -1974,15 +1974,15 @@ static enum path_treatment treat_path(struct dir_struct *dir,
 		 * recurse into this directory (instead of marking the
 		 * directory itself as an ignored path).
 		 */
-		if (!exclude &&
+		if (!excluded &&
 		    path_treatment == path_excluded &&
 		    (dir->flags & DIR_SHOW_IGNORED_TOO) &&
 		    (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING))
 			return path_recurse;
 		return path_treatment;
 	case DT_REG:
 	case DT_LNK:
-		return exclude ? path_excluded : path_untracked;
+		return excluded ? path_excluded : path_untracked;
 	}
 }