From f5eb177f50a0bf37bc6bd9d87b447c73a53b6ea5 Mon Sep 17 00:00:00 2001
From: Kitson Kelly <me@kitsonkelly.com>
Date: Tue, 9 Nov 2021 12:26:39 +1100
Subject: feat(cli): support React 17 JSX transforms (#12631)

Closes #8440
---
 cli/config_file.rs | 55 ++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 49 insertions(+), 6 deletions(-)

(limited to 'cli/config_file.rs')

diff --git a/cli/config_file.rs b/cli/config_file.rs
index 3a71d41a9..20e254dd0 100644
--- a/cli/config_file.rs
+++ b/cli/config_file.rs
@@ -1,7 +1,9 @@
 // Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
 
 use crate::fs_util::canonicalize_path;
+
 use deno_core::error::anyhow;
+use deno_core::error::custom_error;
 use deno_core::error::AnyError;
 use deno_core::error::Context;
 use deno_core::serde::Deserialize;
@@ -17,6 +19,9 @@ use std::fmt;
 use std::path::Path;
 use std::path::PathBuf;
 
+pub(crate) type MaybeImportsResult =
+  Result<Option<Vec<(ModuleSpecifier, Vec<String>)>>, AnyError>;
+
 /// The transpile options that are significant out of a user provided tsconfig
 /// file, that we want to deserialize out of the final config for a transpile.
 #[derive(Debug, Deserialize)]
@@ -31,6 +36,7 @@ pub struct EmitConfigOptions {
   pub jsx: String,
   pub jsx_factory: String,
   pub jsx_fragment_factory: String,
+  pub jsx_import_source: Option<String>,
 }
 
 /// There are certain compiler options that can impact what modules are part of
@@ -38,6 +44,8 @@ pub struct EmitConfigOptions {
 #[derive(Debug, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct CompilerOptions {
+  pub jsx: Option<String>,
+  pub jsx_import_source: Option<String>,
   pub types: Option<Vec<String>>,
 }
 
@@ -404,15 +412,50 @@ impl ConfigFile {
 
   /// If the configuration file contains "extra" modules (like TypeScript
   /// `"types"`) options, return them as imports to be added to a module graph.
-  pub fn to_maybe_imports(
-    &self,
-  ) -> Option<Vec<(ModuleSpecifier, Vec<String>)>> {
+  pub fn to_maybe_imports(&self) -> MaybeImportsResult {
+    let mut imports = Vec::new();
+    let compiler_options_value =
+      if let Some(value) = self.json.compiler_options.as_ref() {
+        value
+      } else {
+        return Ok(None);
+      };
+    let compiler_options: CompilerOptions =
+      serde_json::from_value(compiler_options_value.clone())?;
+    let referrer = ModuleSpecifier::from_file_path(&self.path)
+      .map_err(|_| custom_error("TypeError", "bad config file specifier"))?;
+    if let Some(types) = compiler_options.types {
+      imports.extend(types);
+    }
+    if compiler_options.jsx == Some("react-jsx".to_string()) {
+      imports.push(format!(
+        "{}/jsx-runtime",
+        compiler_options.jsx_import_source.ok_or_else(|| custom_error("TypeError", "Compiler option 'jsx' set to 'react-jsx', but no 'jsxImportSource' defined."))?
+      ));
+    } else if compiler_options.jsx == Some("react-jsxdev".to_string()) {
+      imports.push(format!(
+        "{}/jsx-dev-runtime",
+        compiler_options.jsx_import_source.ok_or_else(|| custom_error("TypeError", "Compiler option 'jsx' set to 'react-jsxdev', but no 'jsxImportSource' defined."))?
+      ));
+    }
+    if !imports.is_empty() {
+      Ok(Some(vec![(referrer, imports)]))
+    } else {
+      Ok(None)
+    }
+  }
+
+  /// Based on the compiler options in the configuration file, return the
+  /// implied JSX import source module.
+  pub fn to_maybe_jsx_import_source_module(&self) -> Option<String> {
     let compiler_options_value = self.json.compiler_options.as_ref()?;
     let compiler_options: CompilerOptions =
       serde_json::from_value(compiler_options_value.clone()).ok()?;
-    let referrer = ModuleSpecifier::from_file_path(&self.path).ok()?;
-    let types = compiler_options.types?;
-    Some(vec![(referrer, types)])
+    match compiler_options.jsx.as_deref() {
+      Some("react-jsx") => Some("jsx-runtime".to_string()),
+      Some("react-jsxdev") => Some("jsx-dev-runtime".to_string()),
+      _ => None,
+    }
   }
 
   pub fn to_fmt_config(&self) -> Result<Option<FmtConfig>, AnyError> {
-- 
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