fix(permissions): implicit --allow-import when using --cached-only (#27530)

`--cached-only` cannot communicate with a remote server

Closes https://github.com/denoland/deno/issues/27498

cli/args/flags.rs

@@ -1,6 +1,5 @@
 // Copyright 2018-2025 the Deno authors. MIT license.
 
-use std::borrow::Cow;
 use std::collections::HashSet;
 use std::env;
 use std::ffi::OsString;
@@ -34,7 +33,6 @@ use deno_core::url::Url;
 use deno_graph::GraphKind;
 use deno_path_util::normalize_path;
 use deno_path_util::url_to_file_path;
-use deno_runtime::deno_permissions::PermissionsOptions;
 use deno_runtime::deno_permissions::SysDescriptor;
 use deno_telemetry::OtelConfig;
 use deno_telemetry::OtelConsoleConfig;
@@ -44,8 +42,6 @@ use serde::Deserialize;
 use serde::Serialize;
 
 use super::flags_net;
-use super::jsr_url;
-use crate::args::resolve_no_prompt;
 use crate::util::fs::canonicalize_path;
 
 #[derive(Clone, Debug, Default, Eq, PartialEq)]
@@ -692,97 +688,6 @@ impl PermissionFlags {
       || self.deny_write.is_some()
       || self.allow_import.is_some()
   }
-
-  pub fn to_options(&self, cli_arg_urls: &[Cow<Url>]) -> PermissionsOptions {
-    fn handle_allow<T: Default>(
-      allow_all: bool,
-      value: Option<T>,
-    ) -> Option<T> {
-      if allow_all {
-        assert!(value.is_none());
-        Some(T::default())
-      } else {
-        value
-      }
-    }
-
-    fn handle_imports(
-      cli_arg_urls: &[Cow<Url>],
-      imports: Option<Vec<String>>,
-    ) -> Option<Vec<String>> {
-      if imports.is_some() {
-        return imports;
-      }
-
-      let builtin_allowed_import_hosts = [
-        "jsr.io:443",
-        "deno.land:443",
-        "esm.sh:443",
-        "cdn.jsdelivr.net:443",
-        "raw.githubusercontent.com:443",
-        "gist.githubusercontent.com:443",
-      ];
-
-      let mut imports =
-        Vec::with_capacity(builtin_allowed_import_hosts.len() + 1);
-      imports
-        .extend(builtin_allowed_import_hosts.iter().map(|s| s.to_string()));
-
-      // also add the JSR_URL env var
-      if let Some(jsr_host) = allow_import_host_from_url(jsr_url()) {
-        imports.push(jsr_host);
-      }
-      // include the cli arg urls
-      for url in cli_arg_urls {
-        if let Some(host) = allow_import_host_from_url(url) {
-          imports.push(host);
-        }
-      }
-
-      Some(imports)
-    }
-
-    PermissionsOptions {
-      allow_all: self.allow_all,
-      allow_env: handle_allow(self.allow_all, self.allow_env.clone()),
-      deny_env: self.deny_env.clone(),
-      allow_net: handle_allow(self.allow_all, self.allow_net.clone()),
-      deny_net: self.deny_net.clone(),
-      allow_ffi: handle_allow(self.allow_all, self.allow_ffi.clone()),
-      deny_ffi: self.deny_ffi.clone(),
-      allow_read: handle_allow(self.allow_all, self.allow_read.clone()),
-      deny_read: self.deny_read.clone(),
-      allow_run: handle_allow(self.allow_all, self.allow_run.clone()),
-      deny_run: self.deny_run.clone(),
-      allow_sys: handle_allow(self.allow_all, self.allow_sys.clone()),
-      deny_sys: self.deny_sys.clone(),
-      allow_write: handle_allow(self.allow_all, self.allow_write.clone()),
-      deny_write: self.deny_write.clone(),
-      allow_import: handle_imports(
-        cli_arg_urls,
-        handle_allow(self.allow_all, self.allow_import.clone()),
-      ),
-      prompt: !resolve_no_prompt(self),
-    }
-  }
-}
-
-/// Gets the --allow-import host from the provided url
-fn allow_import_host_from_url(url: &Url) -> Option<String> {
-  let host = url.host()?;
-  if let Some(port) = url.port() {
-    Some(format!("{}:{}", host, port))
-  } else {
-    use deno_core::url::Host::*;
-    match host {
-      Domain(domain) if domain == "jsr.io" && url.scheme() == "https" => None,
-      _ => match url.scheme() {
-        "https" => Some(format!("{}:443", host)),
-        "http" => Some(format!("{}:80", host)),
-        _ => None,
-      },
-    }
-  }
 }
 
 fn join_paths(allowlist: &[String], d: &str) -> String {
@@ -11549,8 +11454,6 @@ mod tests {
         ..Default::default()
       }
     );
-    // just make sure this doesn't panic
-    let _ = flags.permissions.to_options(&[]);
   }
 
   #[test]
@@ -11626,29 +11529,6 @@ Usage: deno repl [OPTIONS] [-- [ARGS]...]\n"
     )
   }
 
-  #[test]
-  fn test_allow_import_host_from_url() {
-    fn parse(text: &str) -> Option<String> {
-      allow_import_host_from_url(&Url::parse(text).unwrap())
-    }
-
-    assert_eq!(parse("https://jsr.io"), None);
-    assert_eq!(
-      parse("http://127.0.0.1:4250"),
-      Some("127.0.0.1:4250".to_string())
-    );
-    assert_eq!(parse("http://jsr.io"), Some("jsr.io:80".to_string()));
-    assert_eq!(
-      parse("https://example.com"),
-      Some("example.com:443".to_string())
-    );
-    assert_eq!(
-      parse("http://example.com"),
-      Some("example.com:80".to_string())
-    );
-    assert_eq!(parse("file:///example.com"), None);
-  }
-
   #[test]
   fn allow_all_conflicts_allow_perms() {
     let flags = [

cli/args/mod.rs

@@ -1526,20 +1526,100 @@ impl CliOptions {
     self.flags.no_npm
   }
 
-  pub fn permission_flags(&self) -> &PermissionFlags {
-    &self.flags.permissions
-  }
-
   pub fn permissions_options(&self) -> PermissionsOptions {
-    fn files_to_urls(files: &[String]) -> Vec<Cow<'_, Url>> {
-      files
-        .iter()
-        .filter_map(|f| Url::parse(f).ok().map(Cow::Owned))
-        .collect()
+    // bury this in here to ensure people use cli_options.permissions_options()
+    fn flags_to_options(flags: &PermissionFlags) -> PermissionsOptions {
+      fn handle_allow<T: Default>(
+        allow_all: bool,
+        value: Option<T>,
+      ) -> Option<T> {
+        if allow_all {
+          assert!(value.is_none());
+          Some(T::default())
+        } else {
+          value
+        }
+      }
+
+      PermissionsOptions {
+        allow_all: flags.allow_all,
+        allow_env: handle_allow(flags.allow_all, flags.allow_env.clone()),
+        deny_env: flags.deny_env.clone(),
+        allow_net: handle_allow(flags.allow_all, flags.allow_net.clone()),
+        deny_net: flags.deny_net.clone(),
+        allow_ffi: handle_allow(flags.allow_all, flags.allow_ffi.clone()),
+        deny_ffi: flags.deny_ffi.clone(),
+        allow_read: handle_allow(flags.allow_all, flags.allow_read.clone()),
+        deny_read: flags.deny_read.clone(),
+        allow_run: handle_allow(flags.allow_all, flags.allow_run.clone()),
+        deny_run: flags.deny_run.clone(),
+        allow_sys: handle_allow(flags.allow_all, flags.allow_sys.clone()),
+        deny_sys: flags.deny_sys.clone(),
+        allow_write: handle_allow(flags.allow_all, flags.allow_write.clone()),
+        deny_write: flags.deny_write.clone(),
+        allow_import: handle_allow(flags.allow_all, flags.allow_import.clone()),
+        prompt: !resolve_no_prompt(flags),
+      }
     }
 
-    // get a list of urls to imply for --allow-import
-    let cli_arg_urls = self
+    let mut permissions_options = flags_to_options(&self.flags.permissions);
+    self.augment_import_permissions(&mut permissions_options);
+    permissions_options
+  }
+
+  fn augment_import_permissions(&self, options: &mut PermissionsOptions) {
+    // do not add if the user specified --allow-all or --allow-import
+    if !options.allow_all && options.allow_import.is_none() {
+      options.allow_import = Some(self.implicit_allow_import());
+    }
+  }
+
+  fn implicit_allow_import(&self) -> Vec<String> {
+    // allow importing from anywhere when using cached only
+    if self.cache_setting() == CacheSetting::Only {
+      vec![] // allow all imports
+    } else {
+      // implicitly allow some trusted hosts and the CLI arg urls
+      let cli_arg_urls = self.get_cli_arg_urls();
+      let builtin_allowed_import_hosts = [
+        "jsr.io:443",
+        "deno.land:443",
+        "esm.sh:443",
+        "cdn.jsdelivr.net:443",
+        "raw.githubusercontent.com:443",
+        "gist.githubusercontent.com:443",
+      ];
+      let mut imports = Vec::with_capacity(
+        builtin_allowed_import_hosts.len() + cli_arg_urls.len() + 1,
+      );
+      imports
+        .extend(builtin_allowed_import_hosts.iter().map(|s| s.to_string()));
+      // also add the JSR_URL env var
+      if let Some(jsr_host) = allow_import_host_from_url(jsr_url()) {
+        if jsr_host != "jsr.io:443" {
+          imports.push(jsr_host);
+        }
+      }
+      // include the cli arg urls
+      for url in cli_arg_urls {
+        if let Some(host) = allow_import_host_from_url(&url) {
+          imports.push(host);
+        }
+      }
+      imports
+    }
+  }
+
+  fn get_cli_arg_urls(&self) -> Vec<Cow<'_, Url>> {
+    fn files_to_urls(files: &[String]) -> Vec<Cow<'_, Url>> {
+      files.iter().filter_map(|f| file_to_url(f)).collect()
+    }
+
+    fn file_to_url(file: &str) -> Option<Cow<'_, Url>> {
+      Url::parse(file).ok().map(Cow::Owned)
+    }
+
+    self
       .resolve_main_module()
       .ok()
       .map(|url| vec![Cow::Borrowed(url)])
@@ -1551,18 +1631,18 @@ impl CliOptions {
           Some(files_to_urls(&check_flags.files))
         }
         DenoSubcommand::Install(InstallFlags::Global(flags)) => {
-          Url::parse(&flags.module_url)
-            .ok()
-            .map(|url| vec![Cow::Owned(url)])
+          file_to_url(&flags.module_url).map(|url| vec![url])
         }
         DenoSubcommand::Doc(DocFlags {
           source_files: DocSourceFileFlag::Paths(paths),
           ..
         }) => Some(files_to_urls(paths)),
+        DenoSubcommand::Info(InfoFlags {
+          file: Some(file), ..
+        }) => file_to_url(file).map(|url| vec![url]),
         _ => None,
       })
-      .unwrap_or_default();
-    self.flags.permissions.to_options(&cli_arg_urls)
+      .unwrap_or_default()
   }
 
   pub fn reload_flag(&self) -> bool {
@@ -1998,6 +2078,20 @@ fn load_env_variables_from_env_file(filename: Option<&Vec<String>>) {
   }
 }
 
+/// Gets the --allow-import host from the provided url
+fn allow_import_host_from_url(url: &Url) -> Option<String> {
+  let host = url.host()?;
+  if let Some(port) = url.port() {
+    Some(format!("{}:{}", host, port))
+  } else {
+    match url.scheme() {
+      "https" => Some(format!("{}:443", host)),
+      "http" => Some(format!("{}:80", host)),
+      _ => None,
+    }
+  }
+}
+
 #[derive(Debug, Clone, Copy)]
 pub enum NpmCachingStrategy {
   Eager,
@@ -2005,7 +2099,7 @@ pub enum NpmCachingStrategy {
   Manual,
 }
 
-pub(crate) fn otel_runtime_config() -> OtelRuntimeConfig {
+pub fn otel_runtime_config() -> OtelRuntimeConfig {
   OtelRuntimeConfig {
     runtime_name: Cow::Borrowed("deno"),
     runtime_version: Cow::Borrowed(crate::version::DENO_VERSION_INFO.deno),
@@ -2102,4 +2196,26 @@ mod test {
     let reg_api_url = jsr_api_url();
     assert!(reg_api_url.as_str().ends_with('/'));
   }
+
+  #[test]
+  fn test_allow_import_host_from_url() {
+    fn parse(text: &str) -> Option<String> {
+      allow_import_host_from_url(&Url::parse(text).unwrap())
+    }
+
+    assert_eq!(
+      parse("http://127.0.0.1:4250"),
+      Some("127.0.0.1:4250".to_string())
+    );
+    assert_eq!(parse("http://jsr.io"), Some("jsr.io:80".to_string()));
+    assert_eq!(
+      parse("https://example.com"),
+      Some("example.com:443".to_string())
+    );
+    assert_eq!(
+      parse("http://example.com"),
+      Some("example.com:80".to_string())
+    );
+    assert_eq!(parse("file:///example.com"), None);
+  }
 }

cli/standalone/binary.rs

@@ -51,6 +51,7 @@ use deno_runtime::deno_fs::FileSystem;
 use deno_runtime::deno_fs::RealFs;
 use deno_runtime::deno_io::fs::FsError;
 use deno_runtime::deno_node::PackageJson;
+use deno_runtime::deno_permissions::PermissionsOptions;
 use deno_semver::npm::NpmVersionReqParseError;
 use deno_semver::package::PackageReq;
 use deno_semver::Version;
@@ -188,7 +189,7 @@ pub struct Metadata {
   pub argv: Vec<String>,
   pub seed: Option<u64>,
   pub code_cache_key: Option<u64>,
-  pub permissions: PermissionFlags,
+  pub permissions: PermissionsOptions,
   pub location: Option<Url>,
   pub v8_flags: Vec<String>,
   pub log_level: Option<Level>,
@@ -793,7 +794,7 @@ impl<'a> DenoCompileBinaryWriter<'a> {
       seed: self.cli_options.seed(),
       code_cache_key,
       location: self.cli_options.location_flag().clone(),
-      permissions: self.cli_options.permission_flags().clone(),
+      permissions: self.cli_options.permissions_options(),
       v8_flags: self.cli_options.v8_flags().clone(),
       unsafely_ignore_certificate_errors: self
         .cli_options

cli/standalone/mod.rs

@@ -920,8 +920,7 @@ pub async fn run(
   };
 
   let permissions = {
-    let mut permissions =
-      metadata.permissions.to_options(/* cli_arg_urls */ &[]);
+    let mut permissions = metadata.permissions;
     // grant read access to the vfs
     match &mut permissions.allow_read {
       Some(vec) if vec.is_empty() => {

tests/specs/info/import_map/__test__.jsonc

@@ -1,9 +1,5 @@
 {
-  "steps": [
-    {
-      "args": "info preact/debug",
-      "output": "with_import_map.out",
-      "exitCode": 0
-    }
-  ]
+  "args": "info preact/debug",
+  "output": "with_import_map.out",
+  "exitCode": 0
 }

tests/specs/permission/allow_import_cached_only/__test__.jsonc

@@ -0,0 +1,22 @@
+{
+  "tempDir": true,
+  "tests": {
+    "no_flag": {
+      // ensure what we're testing will fail without the flags
+      "args": "run main.ts",
+      "output": "fail.out",
+      "exitCode": 1
+    },
+    "with_flags": {
+      "steps": [{
+        "args": "cache --allow-import main.ts",
+        "output": "[WILDLINE]",
+        "exitCode": 0
+      }, {
+        "args": "run --cached-only main.ts",
+        "output": "success.out",
+        "exitCode": 0
+      }]
+    }
+  }
+}

tests/specs/permission/allow_import_cached_only/deno.jsonc

@@ -0,0 +1,3 @@
+{
+  "lock": true
+}

tests/specs/permission/allow_import_cached_only/fail.out

@@ -0,0 +1,2 @@
+error: Requires import access to "localhost:4545", run again with the --allow-import flag
+    at file:///[WILDLINE]/main.ts:1:8

tests/specs/permission/allow_import_cached_only/main.ts

@@ -0,0 +1 @@
+import "http://localhost:4545/welcome.ts";

tests/specs/permission/allow_import_cached_only/success.out

@@ -0,0 +1 @@
+Welcome to Deno!

tests/specs/permission/allow_import_info/__test__.jsonc

@@ -0,0 +1,22 @@
+{
+  "envs": {
+    "JSR_URL": ""
+  },
+  "tests": {
+    "implicit": {
+      "args": "info http://localhost:4545/welcome.ts",
+      "output": "success.out",
+      "exitCode": 0
+    },
+    "via_import_not_allowed": {
+      "args": "info main.ts",
+      "output": "import_not_allowed.out",
+      "exitCode": 0
+    },
+    "via_import_allowed": {
+      "args": "info --allow-import main.ts",
+      "output": "import_allowed.out",
+      "exitCode": 0
+    }
+  }
+}

tests/specs/permission/allow_import_info/import_allowed.out

@@ -0,0 +1,8 @@
+Download http://localhost:4545/welcome.ts
+local: [WILDLINE]
+type: TypeScript
+dependencies: [WILDLINE]
+size: [WILDLINE]
+
+file:///[WILDLINE]/main.ts ([WILDLINE])
+└── http://localhost:4545/welcome.ts ([WILDLINE]B)

tests/specs/permission/allow_import_info/import_not_allowed.out

@@ -0,0 +1,7 @@
+local: [WILDLINE]
+type: TypeScript
+dependencies: [WILDLINE]
+size: [WILDLINE]
+
+file:///[WILDLINE]/allow_import_info/main.ts ([WILDLINE])
+└── http://localhost:4545/welcome.ts (not capable, requires --allow-import)

tests/specs/permission/allow_import_info/main.ts

@@ -0,0 +1 @@
+import "http://localhost:4545/welcome.ts";

tests/specs/permission/allow_import_info/success.out

@@ -0,0 +1,7 @@
+Download http://localhost:4545/welcome.ts
+local: [WILDLINE]
+type: TypeScript
+dependencies: [WILDLINE]
+size: [WILDLINE]
+
+http://localhost:4545/welcome.ts ([WILDLINE]B)