1 files changed, 66 insertions, 0 deletions
diff --git a/testing/mozbase/rust/mozdevice/src/shell.rs b/testing/mozbase/rust/mozdevice/src/shell.rs
new file mode 100644
index 0000000000..55a71c41d5
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+++ b/testing/mozbase/rust/mozdevice/src/shell.rs
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+// Copyright (c) 2017 Jimmy Cuadra
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+use regex::Regex;
+
+/// Escapes a string so it will be interpreted as a single word by the UNIX Bourne shell.
+///
+/// If the input string is empty, this function returns an empty quoted string.
+pub fn escape(input: &str) -> String {
+    // Stolen from
+    // https://docs.rs/shellwords/1.0.0/src/shellwords/lib.rs.html#24-37.
+    // Added space to the pattern to exclude spaces from being escaped
+    // which can cause problems when combining strings to form a full
+    // command.
+    let escape_pattern: Regex = Regex::new(r"([^A-Za-z0-9_\-.,:/@ \n])").unwrap();
+
+    if input.is_empty() {
+        return "''".to_owned();
+    }
+
+    let output = &escape_pattern.replace_all(input, "\\$1");
+
+    output.replace("'\n'", r"\n")
+}
+
+#[cfg(test)]
+mod tests {
+    use super::escape;
+
+    #[test]
+    fn empty_escape() {
+        assert_eq!(escape(""), "''");
+    }
+
+    #[test]
+    fn full_escape() {
+        assert_eq!(escape("foo '\"' bar"), "foo \\'\\\"\\' bar");
+    }
+
+    #[test]
+    fn escape_multibyte() {
+        assert_eq!(escape("あい"), "\\あ\\い");
+    }
+
+    #[test]
+    fn escape_newline() {
+        assert_eq!(escape(r"'\n'"), "\\\'\\\\n\\\'");
+    }
+}