feat(repl): add "--eval-file" flag to execute a script file on startup (#14247)

This commit adds support for "--eval-file" in "deno repl" subcommand.

This flag can be used to pass paths or URLs to files, that will be executed
on REPL startup. All files will be executed in the same context as the REPL
(ie. as "plain old scripts", not ES modules), sharing the global scope.

This feature allows to implement custom REPLs on top of Deno's REPL.

1 files changed, 52 insertions, 0 deletions

diff --git a/cli/tests/integration/repl_tests.rs b/cli/tests/integration/repl_tests.rs
index 59acc7dfb..a63be3ece 100644
--- a/cli/tests/integration/repl_tests.rs
+++ b/cli/tests/integration/repl_tests.rs
@@ -709,3 +709,55 @@ fn eval_flag_runtime_error() {
   assert!(out.contains("2500")); // should not prevent input
   assert!(err.is_empty());
 }
+
+#[test]
+fn eval_file_flag_valid_input() {
+  let (out, err) = util::run_and_collect_output_with_args(
+    true,
+    vec!["repl", "--eval-file=./001_hello.js"],
+    None,
+    None,
+    false,
+  );
+  assert!(out.contains("Hello World"));
+  assert!(err.is_empty());
+}
+
+#[test]
+fn eval_file_flag_call_defined_function() {
+  let (out, err) = util::run_and_collect_output_with_args(
+    true,
+    vec!["repl", "--eval-file=./tsc/d.ts"],
+    Some(vec!["v4()"]),
+    None,
+    false,
+  );
+  assert!(out.contains("hello"));
+  assert!(err.is_empty());
+}
+
+#[test]
+fn eval_file_flag_http_input() {
+  let (out, err) = util::run_and_collect_output_with_args(
+    true,
+    vec!["repl", "--eval-file=http://127.0.0.1:4545/tsc/d.ts"],
+    Some(vec!["v4()"]),
+    None,
+    true,
+  );
+  assert!(out.contains("hello"));
+  assert!(err.contains("Download"));
+}
+
+#[test]
+fn eval_file_flag_multiple_files() {
+  let (out, err) = util::run_and_collect_output_with_args(
+    true,
+    vec!["repl", "--eval-file=http://127.0.0.1:4545/import_type.ts,./tsc/d.ts,http://127.0.0.1:4545/type_definitions/foo.js"],
+    Some(vec!["b.method1=v4", "b.method1()+foo.toUpperCase()"]),
+    None,
+    true,
+  );
+  assert!(out.contains("helloFOO"));
+  assert!(err.contains("Download"));
+}