fix: Directory hidden files in write_source_file. (#860)

* Fix #667: Dir hidden files in write_source_file.

Copy and manage hidden files starting with "." in write_source_files.

Previously these files were not supported if they were in the top level
of the directory to copy.

* Add test and fix error messages from cp, chmod.

* Also fix executable dir case.

* Fix issue with copying directory rather than contents.

lib/private/write_source_file.bzl

@@ -201,7 +201,7 @@ fi"""]
 
     if ctx.attr.executable:
         executable_file = "chmod +x \"$out\""
-        executable_dir = "chmod -R +x \"$out\"/*"
+        executable_dir = "chmod -R +x \"$out\""
     else:
         executable_file = "chmod -x \"$out\""
         if is_macos:
@@ -209,7 +209,7 @@ fi"""]
             executable_dir = "find \"$out\" -type f | xargs chmod -x"
         else:
             # Remove execute/search bit recursively from files bit not directories: https://superuser.com/a/434418
-            executable_dir = "chmod -R -x+X \"$out\"/*"
+            executable_dir = "chmod -R -x+X \"$out\""
 
     for in_path, out_path in paths:
         contents.append("""
@@ -231,10 +231,10 @@ else
     echo "Copying directory $in to $out in $PWD"
     # in case `cp` from previous command was terminated midway which can result in read-only files/dirs
     chmod -R ug+w "$out" > /dev/null 2>&1 || true
-    rm -Rf "$out"/*
+    rm -Rf "$out"/{{*,.[!.]*}}
     mkdir -p "$out"
-    cp -fRL "$in"/* "$out"
-    chmod -R ug+w "$out"/*
+    cp -fRL "$in"/. "$out"
+    chmod -R ug+w "$out"
     {executable_dir}
 fi
 """.format(

lib/tests/write_source_files/BUILD.bazel

@@ -101,6 +101,19 @@ output_files(
     target = ":g_h-desired",
 )
 
+genrule(
+    name = "hidden-contained",
+    outs = [".hidden"],
+    cmd = "echo 'hidden file test' > $@",
+)
+
+copy_to_directory(
+    name = "hidden_dir-desired",
+    srcs = [
+        ":hidden-contained",
+    ],
+)
+
 write_source_file_test(
     name = "a_test",
     in_file = ":a-desired",
@@ -137,6 +150,12 @@ write_source_file_test(
     out_file = "g.js",
 )
 
+write_source_file(
+    name = "hidden_dir_test",
+    in_file = ":hidden_dir-desired",
+    out_file = "hidden_dir",
+)
+
 write_source_files(
     name = "macro_smoke_test",
     additional_update_targets = [

lib/tests/write_source_files/hidden_dir/.hidden

@@ -0,0 +1 @@
+hidden file test