Move fetch_remote_source, fetch_local_source

They do not depend on DenoDir, so should not be methods of it.

cli/deno_dir.rs

@@ -157,95 +157,6 @@ impl DenoDir {
     }
   }
 
-  // Prototype https://github.com/denoland/deno/blob/golang/deno_dir.go#L37-L73
-  /// Fetch remote source code.
-  fn fetch_remote_source(
-    self: &Self,
-    module_name: &str,
-    filename: &str,
-  ) -> DenoResult<Option<ModuleMetaData>> {
-    let p = Path::new(&filename);
-    // We write a special ".mime" file into the `.deno/deps` directory along side the
-    // cached file, containing just the media type.
-    let media_type_filename = [&filename, ".mime"].concat();
-    let mt = Path::new(&media_type_filename);
-    eprint!("Downloading {}...", &module_name); // no newline
-    let maybe_source = http_util::fetch_sync_string(&module_name);
-    if let Ok((source, content_type)) = maybe_source {
-      eprintln!(""); // next line
-      match p.parent() {
-        Some(ref parent) => fs::create_dir_all(parent),
-        None => Ok(()),
-      }?;
-      deno_fs::write_file(&p, &source, 0o666)?;
-      // Remove possibly existing stale .mime file
-      // may not exist. DON'T unwrap
-      let _ = std::fs::remove_file(&media_type_filename);
-      // Create .mime file only when content type different from extension
-      let resolved_content_type = map_content_type(&p, Some(&content_type));
-      let ext = p
-        .extension()
-        .map(|x| x.to_str().unwrap_or(""))
-        .unwrap_or("");
-      let media_type = extmap(&ext);
-      if media_type == msg::MediaType::Unknown
-        || media_type != resolved_content_type
-      {
-        deno_fs::write_file(&mt, content_type.as_bytes(), 0o666)?
-      }
-      return Ok(Some(ModuleMetaData {
-        module_name: module_name.to_string(),
-        filename: filename.to_string(),
-        media_type: map_content_type(&p, Some(&content_type)),
-        source_code: source.as_bytes().to_owned(),
-        maybe_output_code_filename: None,
-        maybe_output_code: None,
-        maybe_source_map_filename: None,
-        maybe_source_map: None,
-      }));
-    } else {
-      eprintln!(" NOT FOUND");
-    }
-    Ok(None)
-  }
-
-  /// Fetch local or cached source code.
-  fn fetch_local_source(
-    self: &Self,
-    module_name: &str,
-    filename: &str,
-  ) -> DenoResult<Option<ModuleMetaData>> {
-    let p = Path::new(&filename);
-    let media_type_filename = [&filename, ".mime"].concat();
-    let mt = Path::new(&media_type_filename);
-    let source_code = match fs::read(p) {
-      Err(e) => {
-        if e.kind() == std::io::ErrorKind::NotFound {
-          return Ok(None);
-        } else {
-          return Err(e.into());
-        }
-      }
-      Ok(c) => c,
-    };
-    // .mime file might not exists
-    // this is okay for local source: maybe_content_type_str will be None
-    let maybe_content_type_string = fs::read_to_string(&mt).ok();
-    // Option<String> -> Option<&str>
-    let maybe_content_type_str =
-      maybe_content_type_string.as_ref().map(String::as_str);
-    Ok(Some(ModuleMetaData {
-      module_name: module_name.to_string(),
-      filename: filename.to_string(),
-      media_type: map_content_type(&p, maybe_content_type_str),
-      source_code,
-      maybe_output_code_filename: None,
-      maybe_output_code: None,
-      maybe_source_map_filename: None,
-      maybe_source_map: None,
-    }))
-  }
-
   // Prototype: https://github.com/denoland/deno/blob/golang/os.go#L122-L138
   fn get_source_code(
     self: &Self,
@@ -261,7 +172,7 @@ impl DenoDir {
         "fetch local or reload {} is_module_remote {}",
         module_name, is_module_remote
       );
-      match self.fetch_local_source(&module_name, &filename)? {
+      match fetch_local_source(&module_name, &filename)? {
         Some(output) => {
           debug!("found local source ");
           return Ok(output);
@@ -284,8 +195,7 @@ impl DenoDir {
     debug!("is remote but didn't find module");
 
     // not cached/local, try remote
-    let maybe_remote_source =
-      self.fetch_remote_source(&module_name, &filename)?;
+    let maybe_remote_source = fetch_remote_source(&module_name, &filename)?;
     if let Some(output) = maybe_remote_source {
       return Ok(output);
     }
@@ -582,6 +492,93 @@ fn filter_shebang(bytes: Vec<u8>) -> Vec<u8> {
   }
 }
 
+// Prototype https://github.com/denoland/deno/blob/golang/deno_dir.go#L37-L73
+/// Fetch remote source code.
+fn fetch_remote_source(
+  module_name: &str,
+  filename: &str,
+) -> DenoResult<Option<ModuleMetaData>> {
+  let p = Path::new(&filename);
+  // We write a special ".mime" file into the `.deno/deps` directory along side the
+  // cached file, containing just the media type.
+  let media_type_filename = [&filename, ".mime"].concat();
+  let mt = Path::new(&media_type_filename);
+  eprint!("Downloading {}...", &module_name); // no newline
+  let maybe_source = http_util::fetch_sync_string(&module_name);
+  if let Ok((source, content_type)) = maybe_source {
+    eprintln!(""); // next line
+    match p.parent() {
+      Some(ref parent) => fs::create_dir_all(parent),
+      None => Ok(()),
+    }?;
+    deno_fs::write_file(&p, &source, 0o666)?;
+    // Remove possibly existing stale .mime file
+    // may not exist. DON'T unwrap
+    let _ = std::fs::remove_file(&media_type_filename);
+    // Create .mime file only when content type different from extension
+    let resolved_content_type = map_content_type(&p, Some(&content_type));
+    let ext = p
+      .extension()
+      .map(|x| x.to_str().unwrap_or(""))
+      .unwrap_or("");
+    let media_type = extmap(&ext);
+    if media_type == msg::MediaType::Unknown
+      || media_type != resolved_content_type
+    {
+      deno_fs::write_file(&mt, content_type.as_bytes(), 0o666)?
+    }
+    return Ok(Some(ModuleMetaData {
+      module_name: module_name.to_string(),
+      filename: filename.to_string(),
+      media_type: map_content_type(&p, Some(&content_type)),
+      source_code: source.as_bytes().to_owned(),
+      maybe_output_code_filename: None,
+      maybe_output_code: None,
+      maybe_source_map_filename: None,
+      maybe_source_map: None,
+    }));
+  } else {
+    eprintln!(" NOT FOUND");
+  }
+  Ok(None)
+}
+
+/// Fetch local or cached source code.
+fn fetch_local_source(
+  module_name: &str,
+  filename: &str,
+) -> DenoResult<Option<ModuleMetaData>> {
+  let p = Path::new(&filename);
+  let media_type_filename = [&filename, ".mime"].concat();
+  let mt = Path::new(&media_type_filename);
+  let source_code = match fs::read(p) {
+    Err(e) => {
+      if e.kind() == std::io::ErrorKind::NotFound {
+        return Ok(None);
+      } else {
+        return Err(e.into());
+      }
+    }
+    Ok(c) => c,
+  };
+  // .mime file might not exists
+  // this is okay for local source: maybe_content_type_str will be None
+  let maybe_content_type_string = fs::read_to_string(&mt).ok();
+  // Option<String> -> Option<&str>
+  let maybe_content_type_str =
+    maybe_content_type_string.as_ref().map(String::as_str);
+  Ok(Some(ModuleMetaData {
+    module_name: module_name.to_string(),
+    filename: filename.to_string(),
+    media_type: map_content_type(&p, maybe_content_type_str),
+    source_code,
+    maybe_output_code_filename: None,
+    maybe_output_code: None,
+    maybe_source_map_filename: None,
+    maybe_source_map: None,
+  }))
+}
+
 #[cfg(test)]
 mod tests {
   use super::*;
@@ -835,7 +832,7 @@ mod tests {
       );
       let mime_file_name = format!("{}.mime", &filename);
 
-      let result = deno_dir.fetch_remote_source(module_name, &filename);
+      let result = fetch_remote_source(module_name, &filename);
       assert!(result.is_ok());
       let r = result.unwrap().unwrap();
       assert_eq!(r.source_code, "export const loaded = true;\n".as_bytes());
@@ -845,7 +842,7 @@ mod tests {
 
       // Modify .mime, make sure read from local
       let _ = fs::write(&mime_file_name, "text/javascript");
-      let result2 = deno_dir.fetch_local_source(module_name, &filename);
+      let result2 = fetch_local_source(module_name, &filename);
       assert!(result2.is_ok());
       let r2 = result2.unwrap().unwrap();
       assert_eq!(r2.source_code, "export const loaded = true;\n".as_bytes());
@@ -868,7 +865,7 @@ mod tests {
           .as_ref(),
       );
       let mime_file_name = format!("{}.mime", &filename);
-      let result = deno_dir.fetch_remote_source(module_name, &filename);
+      let result = fetch_remote_source(module_name, &filename);
       assert!(result.is_ok());
       let r = result.unwrap().unwrap();
       assert_eq!(r.source_code, "export const loaded = true;\n".as_bytes());
@@ -887,7 +884,7 @@ mod tests {
           .as_ref(),
       );
       let mime_file_name_2 = format!("{}.mime", &filename_2);
-      let result_2 = deno_dir.fetch_remote_source(module_name_2, &filename_2);
+      let result_2 = fetch_remote_source(module_name_2, &filename_2);
       assert!(result_2.is_ok());
       let r2 = result_2.unwrap().unwrap();
       assert_eq!(r2.source_code, "export const loaded = true;\n".as_bytes());
@@ -907,7 +904,7 @@ mod tests {
           .as_ref(),
       );
       let mime_file_name_3 = format!("{}.mime", &filename_3);
-      let result_3 = deno_dir.fetch_remote_source(module_name_3, &filename_3);
+      let result_3 = fetch_remote_source(module_name_3, &filename_3);
       assert!(result_3.is_ok());
       let r3 = result_3.unwrap().unwrap();
       assert_eq!(r3.source_code, "export const loaded = true;\n".as_bytes());
@@ -923,14 +920,14 @@ mod tests {
   #[test]
   fn test_fetch_source_3() {
     // only local, no http_util::fetch_sync_string called
-    let (_temp_dir, deno_dir) = test_setup(false, false);
+    let (_temp_dir, _deno_dir) = test_setup(false, false);
     let cwd = std::env::current_dir().unwrap();
     let cwd_string = cwd.to_str().unwrap();
     let module_name = "http://example.com/mt_text_typescript.t1.ts"; // not used
     let filename =
       format!("{}/tests/subdir/mt_text_typescript.t1.ts", &cwd_string);
 
-    let result = deno_dir.fetch_local_source(module_name, &filename);
+    let result = fetch_local_source(module_name, &filename);
     assert!(result.is_ok());
     let r = result.unwrap().unwrap();
     assert_eq!(r.source_code, "export const loaded = true;\n".as_bytes());