1 files changed, 14 insertions, 0 deletions
diff --git a/bin/undot-paths b/bin/undot-paths
new file mode 100755
index 000000000..2ed86bdec
--- /dev/null
+++ b/bin/undot-paths
@@ -0,0 +1,14 @@
+#! /bin/sh
+# undot_paths : lines path |> lines path
+# Remove all dots (. and ..) from input paths.
+set -euf
+
+sed '
+  :0
+  s://\+:/:g
+  s:/\.\(/\|$\):\1:g
+  s:/[^/]\+/\.\.\(/\|$\):\1:g
+  s:^/\(\.\./\)\+:/:
+  t0
+  s:^$:/:
+'