1 files changed, 35 insertions, 0 deletions
diff --git a/cli/args/import_map.rs b/cli/args/import_map.rs
new file mode 100644
index 000000000..200336c43
--- /dev/null
+++ b/cli/args/import_map.rs
@@ -0,0 +1,35 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+use deno_core::error::AnyError;
+use deno_core::serde_json;
+use deno_core::url::Url;
+use import_map::ImportMap;
+use import_map::ImportMapDiagnostic;
+use log::warn;
+
+pub fn import_map_from_value(
+  specifier: &Url,
+  json_value: serde_json::Value,
+) -> Result<ImportMap, AnyError> {
+  debug_assert!(
+    !specifier.as_str().contains("../"),
+    "Import map specifier incorrectly contained ../: {}",
+    specifier.as_str()
+  );
+  let result = import_map::parse_from_value(specifier, json_value)?;
+  print_import_map_diagnostics(&result.diagnostics);
+  Ok(result.import_map)
+}
+
+fn print_import_map_diagnostics(diagnostics: &[ImportMapDiagnostic]) {
+  if !diagnostics.is_empty() {
+    warn!(
+      "Import map diagnostics:\n{}",
+      diagnostics
+        .iter()
+        .map(|d| format!("  - {}", d))
+        .collect::<Vec<_>>()
+        .join("\n")
+    );
+  }
+}