Add CI test for escaping

Test both escaping variables passed into debos and the new escaping
template function

Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>

.github/workflows/ci.yaml

@@ -125,6 +125,7 @@ jobs:
           - { name: "uml", backend: "--fakemachine-backend=uml" }
         test:
           - { name: "recipes", case: "recipes" }
+          - { name: "escaping", case: "escaping", variables: " -t escaped:\\$ba\\'d\\$gers\\ snakes" }
           - { name: "debian (amd64)", case: "debian", variables: "-t architecture:amd64" }
           - { name: "debian (arm64)", case: "debian", variables: "-t architecture:arm64" }
           - { name: "debian (armhf)", case: "debian", variables: "-t architecture:armhf" }

tests/escaping/test.yaml

@@ -0,0 +1,20 @@
+# expected to be run with -t escaled:\$bad\'ge\$rs or similar to verify passing
+# variables onwards
+{{ $escaped := or .escaped "$mu'room$" }}
+architecture: amd64
+
+actions:
+ - action: run
+   description: test escaping
+   chroot: false
+   command: echo {{ escape $escaped }} > test.a
+ - action: run
+   description: test escaping
+   chroot: false
+   command: |-
+     cat << 'EOF' > test.b
+     {{ $escaped }}
+     EOF
+ - action: run
+   chroot: false
+   command: diff -u test.a test.b