[PATCH v3 17/19] pathspec.c: extract new validate_path() for reuse

[Adam Spiers <git@adamspiers.org>]

This will be reused by a new git check-ignore command.

Signed-off-by: Adam Spiers <git@adamspiers.org>
---
 pathspec.c | 20 ++++++++++++++------
 pathspec.h |  1 +
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/pathspec.c b/pathspec.c
index 8aea0d2..6724121 100644
--- a/pathspec.c
+++ b/pathspec.c
@@ -77,9 +77,20 @@ void treat_gitlinks(const char **pathspec)
 }
 
 /*
+ * Dies if the given path refers to a file inside a symlinked
+ * directory.
+ */
+void validate_path(const char *path, const char *prefix)
+{
+	if (has_symlink_leading_path(path, strlen(path))) {
+		int len = prefix ? strlen(prefix) : 0;
+		die(_("'%s' is beyond a symbolic link"), path + len);
+	}
+}
+
+/*
  * Normalizes argv relative to prefix, via get_pathspec(), and then
- * dies if any path in the normalized list refers to a file inside a
- * symlinked directory.
+ * runs validate_path() on each path in the normalized list.
  */
 const char **validate_pathspec(const char **argv, const char *prefix)
 {
@@ -88,10 +99,7 @@ const char **validate_pathspec(const char **argv, const char *prefix)
 	if (pathspec) {
 		const char **p;
 		for (p = pathspec; *p; p++) {
-			if (has_symlink_leading_path(*p, strlen(*p))) {
-				int len = prefix ? strlen(prefix) : 0;
-				die(_("'%s' is beyond a symbolic link"), *p + len);
-			}
+			validate_path(*p, prefix);
 		}
 	}
 
diff --git a/pathspec.h b/pathspec.h
index 8bb670b..c251441 100644
--- a/pathspec.h
+++ b/pathspec.h
@@ -2,4 +2,5 @@ extern char *find_used_pathspec(const char **pathspec);
 extern void fill_pathspec_matches(const char **pathspec, char *seen, int specs);
 extern const char *treat_gitlink(const char *path);
 extern void treat_gitlinks(const char **pathspec);
+extern void validate_path(const char *path, const char *prefix);
 extern const char **validate_pathspec(const char **argv, const char *prefix);
-- 
1.7.11.2.249.g31c7954