feat: add startingwith to jinja whitelist (#1679)

Author: pavelzw

docs/reference/jinja.md

@@ -199,6 +199,28 @@ You can also check for the existence of an environment variable:
 - `${{ env.exists("MY_ENV_VAR") }}` will return `true` if the environment
   variable `MY_ENV_VAR` is set and `false` otherwise.
 
+## Tests
+
+You can write tests using minijinja to check whether objects have certain properties.
+The syntax for a filter is `{{ variable is test_name }}`.
+
+- `undefined`: Check whether a variable is undefined.
+- `defined`: Check whether a variable is defined.
+- `none`: Check whether a variable is none.
+- `safe`: Check whether a variable is safe.
+- `escaped`: Check whether a variable is escaped. Same as `is safe`.
+- `odd`: Check whether a number is odd.
+- `even`: Check whether a number is even.
+- `number`: Check whether a variable is a number.
+- `integer`: Check whether a variable is an integer.
+- `int`: Check whether a variable is an integer. Same as `is integer`.
+- `float`: Check whether a variable is a float.
+- `string`: Check whether a variable is a string.
+- `sequence`: Check whether a variable is a sequence.
+- `boolean`: Check whether a variable is a boolean.
+- `startingwith`: Check whether a variable is starting with another string: `{{ python is startingwith('3.12') }}`
+- `endingwith`: Check whether a variable is starting with another string: `{{ python is endingwith('.*') }}`
+
 ## Filters
 
 A feature of `jinja` is called "filters". Filters are functions that can be

src/recipe/jinja.rs

@@ -309,6 +309,8 @@ fn default_tests(env: &mut Environment) {
     env.add_test("string", minijinja::tests::is_string);
     env.add_test("sequence", minijinja::tests::is_sequence);
     env.add_test("boolean", minijinja::tests::is_boolean);
+    env.add_test("startingwith", minijinja::tests::is_startingwith);
+    env.add_test("endingwith", minijinja::tests::is_endingwith);
 
     // operators
     env.add_test("eq", minijinja::tests::is_eq);

test-data/recipes/jinja-types/recipe.yaml

@@ -32,6 +32,10 @@ context:
   # quoted bool is quoted in variants.yaml and thus should be a string
   is_quoted_true_var: ${{ quoted_bool is string }}
   is_quoted_int_var: ${{ quoted_int is string }}
+  starting_with: ${{ xstring is startingwith('blah') }}
+  not_starting_with: ${{ xstring is startingwith('foo') }}
+  ending_with: ${{ xstring is startingwith('blah') }}
+  not_ending_with: ${{ xstring is startingwith('foo') }}
 
 package:
   name: testtypes

test/end-to-end/__snapshots__/test_simple/test_jinja_types.json

@@ -7,6 +7,7 @@
   "cquoted": "5",
   "cquoted_bool": "true",
   "cstring": "blah",
+  "ending_with": true,
   "float": "1.23",
   "inline_list": [
     "a",
@@ -35,5 +36,8 @@
     "b",
     "c"
   ],
+  "not_ending_with": false,
+  "not_starting_with": false,
+  "starting_with": true,
   "string": "blah"
 }