[#242] No scan symlinks as md files

CHANGES.md

@@ -44,10 +44,11 @@ Unreleased
 * [#254](https://github.com/serokell/xrefcheck/pull/254)
   + Now the `dump-config` command does not overwrite a file unless explicitly told with a
     `--force` flag. Also, a `--stdout` flag allows to print the config to stdout instead.
-    the configured Markdown flavour.
 * [#250](https://github.com/serokell/xrefcheck/pull/250)
   + Now the redirect behavior for external references can be modified via rules in the
     configuration file with the `externalRefRedirects` parameter.
+* [#261](https://github.com/serokell/xrefcheck/pull/261)
+  + Symlinks are now not processed by the scanner.
 
 0.2.2
 ==========

src/Xrefcheck/Scan.hs

@@ -264,7 +264,10 @@ scanRepo scanMode rw formatsSupport config root = do
     gatherFileStatuses = map (second fst)
 
     processFile :: CanonicalPath -> IO (FileStatus, [ScanError 'Parse])
-    processFile canonicalFile = case mscanner canonicalFile of
+    processFile canonicalFile =
+      ifM (pathIsSymbolicLink canonicalFile)
+      (pure (NotScannable, []))
+      case mscanner canonicalFile of
         Nothing -> pure (NotScannable, [])
         Just scanner -> scanner canonicalFile <&> _1 %~ Scanned
 

src/Xrefcheck/System.hs

@@ -14,6 +14,7 @@ module Xrefcheck.System
   , getPosixRelativeChild
   , getPosixRelativeOrAbsoluteChild
   , hasIndirectionThroughParent
+  , pathIsSymbolicLink
   , takeDirectory
   , takeExtension
   , (</)
@@ -94,6 +95,10 @@ takeDirectory (UnsafeCanonicalPath p) = UnsafeCanonicalPath $ FP.takeDirectory p
 takeExtension :: CanonicalPath -> String
 takeExtension (UnsafeCanonicalPath p) = FP.takeExtension p
 
+-- | 'System.Directory.pathIsSymbolicLink' version for 'CanonicalPath'.
+pathIsSymbolicLink :: CanonicalPath -> IO Bool
+pathIsSymbolicLink (UnsafeCanonicalPath p) = Directory.pathIsSymbolicLink p
+
 -- | Get the list of directories, canonicalized, between two given paths.
 getDirsBetweenRootAndFile :: CanonicalPath -> CanonicalPath -> [CanonicalPath]
 getDirsBetweenRootAndFile (UnsafeCanonicalPath rootPath) file =

tests/golden/check-symlinks/check-symlinks.bats

@@ -0,0 +1,17 @@
+#!/usr/bin/env bats
+
+# SPDX-FileCopyrightText: 2023 Serokell <https://serokell.io>
+#
+# SPDX-License-Identifier: MPL-2.0
+
+load '../helpers/bats-support/load'
+load '../helpers/bats-assert/load'
+load '../helpers/bats-file/load'
+load '../helpers'
+
+
+@test "Checking that symlinks are not processed" {
+  to_temp xrefcheck -v
+
+  assert_diff expected.gold
+}

tests/golden/check-symlinks/dir/b.md

@@ -0,0 +1,11 @@
+<!--
+ - SPDX-FileCopyrightText: 2023 Serokell <https://serokell.io>
+ -
+ - SPDX-License-Identifier: MPL-2.0
+ -->
+
+[Empty file](a)
+
+[Symlink ref](../s.md)
+
+[Symlink ref with anchor](../s.md#a)

tests/golden/check-symlinks/expected.gold

@@ -0,0 +1,20 @@
+=== Repository data ===
+
+  dir/b.md:
+    - references:
+        - reference (relative) at src:7:1-15:
+            - text: "Empty file"
+            - link: a
+            - anchor: -
+        - reference (relative) at src:9:1-22:
+            - text: "Symlink ref"
+            - link: ../s.md
+            - anchor: -
+        - reference (relative) at src:11:1-36:
+            - text: "Symlink ref with anchor"
+            - link: ../s.md
+            - anchor: a
+    - anchors:
+        none
+
+All repository links are valid.

tests/golden/check-symlinks/s.md

@@ -0,0 +1 @@
+dir/b.md