refactor(tvix/nix-compat): absorb //tvix/derivation r/5791

Put this in its src/derivation.

Change-Id: Ic047ab1c2da555a833ee454e10ef60c77537b617
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7967
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>

1 files changed, 17 insertions, 0 deletions

diff --git a/tvix/nix-compat/src/derivation/string_escape.rs b/tvix/nix-compat/src/derivation/string_escape.rs
new file mode 100644
index 000000000000..0e1dbe516f73
--- /dev/null
+++ b/tvix/nix-compat/src/derivation/string_escape.rs
@@ -0,0 +1,17 @@
+const STRING_ESCAPER: [(char, &str); 5] = [
+    ('\\', "\\\\"),
+    ('\n', "\\n"),
+    ('\r', "\\r"),
+    ('\t', "\\t"),
+    ('\"', "\\\""),
+];
+
+pub fn escape_string(s: &str) -> String {
+    let mut s_replaced = s.to_string();
+
+    for escape_sequence in STRING_ESCAPER {
+        s_replaced = s_replaced.replace(escape_sequence.0, escape_sequence.1);
+    }
+
+    format!("\"{}\"", s_replaced)
+}