add os.sh & fix a couple of bugs

1 files changed, 33 insertions, 0 deletions

diff --git a/src/os.sh b/src/os.sh
new file mode 100644
index 0000000..2a532cd
--- /dev/null
+++ b/src/os.sh
@@ -0,0 +1,33 @@
+# Copyright (c) 2016 Egor Tensin <Egor.Tensin@gmail.com>
+# This file is part of the "Configuration file sharing" project.
+# For details, see https://github.com/egor-tensin/config-links.
+# Distributed under the MIT License.
+
+# Mostly Cygwin-related stuff
+
+os="$( uname -o )"
+readonly os
+
+is_cygwin() {
+    test "$os" == 'Cygwin'
+}
+
+check_symlinks_enabled_cygwin() {
+    case "${CYGWIN-}" in
+        *winsymlinks:native*)       ;;
+        *winsymlinks:nativestrict*) ;;
+
+        *)
+            dump "native Windows symlinks aren't enabled in Cygwin" >&2
+            return 1
+            ;;
+    esac
+}
+
+check_symlinks_enabled() {
+    if is_cygwin; then
+        check_symlinks_enabled_cygwin
+    else
+        return 0
+    fi
+}