Add more support for symlinks on Windows

See mksymlink() for details of the symlinks support on Windows.

1 files changed, 71 insertions, 29 deletions

diff --git a/tests/dir-iterator/testscript b/tests/dir-iterator/testscript
index b1444ad..720622f 100644
--- a/tests/dir-iterator/testscript
+++ b/tests/dir-iterator/testscript
@@ -14,42 +14,84 @@ $* a >"reg     b"
 mkdir -p a/b;
 $* a >"dir     b"
 
-# Note that on Windows only directory symlinks are currently supported (see
-# mksymlink() for details).
-#
-: dangling-link
+: symlink
 :
-if ($cxx.target.class != 'windows')
+: If we are not cross-testing let's test dangling and non-dangling symlynks.
+: On Windows that involves mklink command usability test. If we fail to create
+: a trial link (say because we are not in the Developer Mode and are running
+: non-elevated console), then the test group will be silently skipped.
+:
+if ($test.target == $build.host)
 {
-  +mkdir a
-  +touch --no-cleanup a/b
-  +ln -s a/b a/l
-  +rm a/b
+  +if ($cxx.target.class != 'windows')
+    lns = ln -s wd/t wd/l &wd/l
+  else
+    echo 'yes' >=t
+    if cmd /C 'mklink l t' >- 2>- &?l && cat l >'yes'
+      lns = cmd /C 'mklink wd\l t' &wd/l >-
+    end
 
-  +touch a/c
+    jnc = cmd /C 'mklink /J wd\l wd\t' &wd/l >-
+  end
 
-  $* ../a     >! 2>!       != 0 : keep
-  $* -i ../a  >'reg     c'      : skip
-}
-else
-{
-  +mkdir a
-  +mkdir --no-cleanup a/b
-  +ln -s a/b a/bl
-  +rmdir a/b
+  : symlink
+  :
+  if! $empty($lns)
+  {
+    : file
+    :
+    {
+      +mkdir wd
+      +touch --no-cleanup wd/t
+      +touch wd/f
+      +$lns
+      +$* wd >>~%EOO%
+        %(reg     f|reg     t|sym reg l)%{3}
+        EOO
+      +rm wd/t
 
-  +touch a/c
+      $*    ../wd >- 2>! != 0 : keep
+      $* -i ../wd >'reg     f': skip
+    }
 
-  +mkdir a/d
-  +ln -s a/d a/dl
+    : dir
+    :
+    {
+      +mkdir wd
+      +mkdir --no-cleanup wd/t
+      +mkdir wd/d
+      +$lns
 
-  # On Wine dangling symlinks are not visible (see mksymlink() for details).
-  #
-  #$* ../a >! 2>! != 0 : keep
+      # Note that this test may fail on Windows (see symlinks known issues in
+      # libbutl/filesystem.mxx).
+      #
+      +if ($cxx.target.class != 'windows')
+         $* wd >>~%EOO%
+          %(dir     d|dir     t|sym dir l)%{3}
+          EOO
+      end
 
-  : skip
+      +rmdir wd/t
+
+      $*    ../wd >- 2>! != 0 : keep
+      $* -i ../wd >'dir     d': skip
+    }
+  }
+
+  : junction
   :
-  $* -i ../a >>~%EOO%
-    %(reg     c|dir     d|sym dir dl)%{3}
-    EOO
+  if! $empty($jnc)
+  {
+    +mkdir wd
+    +mkdir --no-cleanup wd/t
+    +mkdir wd/d
+    +$jnc
+    +$* wd >>~%EOO%
+      %(dir     d|dir     t|sym dir l)%{3}
+      EOO
+    +rmdir wd/t
+
+    $*    ../wd >- 2>! != 0 : keep
+    $* -i ../wd >'dir     d': skip
+  }
 }