From d7c3b5e5d04f2949bb42982fe3a2bdbda60909dc Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Tue, 14 May 2019 16:32:46 -0700
Subject: [PATCH] Add getParsedCommandLine as optional method on
 SolutionBuilderHost

---
 src/compiler/tsbuild.ts                       | 20 +++++++++++++++----
 .../reference/api/tsserverlibrary.d.ts        |  1 +
 tests/baselines/reference/api/typescript.d.ts |  1 +
 3 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/src/compiler/tsbuild.ts b/src/compiler/tsbuild.ts
index f30800c100..99bb27aba2 100644
--- a/src/compiler/tsbuild.ts
+++ b/src/compiler/tsbuild.ts
@@ -245,6 +245,7 @@ namespace ts {
         getModifiedTime(fileName: string): Date | undefined;
         setModifiedTime(fileName: string, date: Date): void;
         deleteFile(fileName: string): void;
+        getParsedCommandLine?(fileName: string): ParsedCommandLine | undefined;
 
         reportDiagnostic: DiagnosticReporter; // Technically we want to move it out and allow steps of actions on Solution, but for now just merge stuff in build host here
         reportSolutionBuilderStatus: DiagnosticReporter;
@@ -493,10 +494,17 @@ namespace ts {
         }
 
         let diagnostic: Diagnostic | undefined;
-        const { parseConfigFileHost, baseCompilerOptions, extendedConfigCache } = state;
-        parseConfigFileHost.onUnRecoverableConfigFileDiagnostic = d => diagnostic = d;
-        const parsed = getParsedCommandLineOfConfigFile(configFileName, baseCompilerOptions, parseConfigFileHost, extendedConfigCache);
-        parseConfigFileHost.onUnRecoverableConfigFileDiagnostic = noop;
+        const { parseConfigFileHost, baseCompilerOptions, extendedConfigCache, host } = state;
+        let parsed: ParsedCommandLine | undefined;
+        if (host.getParsedCommandLine) {
+            parsed = host.getParsedCommandLine(configFileName);
+            if (!parsed) diagnostic = createCompilerDiagnostic(Diagnostics.File_0_not_found, configFileName);
+        }
+        else {
+            parseConfigFileHost.onUnRecoverableConfigFileDiagnostic = d => diagnostic = d;
+            parsed = getParsedCommandLineOfConfigFile(configFileName, baseCompilerOptions, parseConfigFileHost, extendedConfigCache);
+            parseConfigFileHost.onUnRecoverableConfigFileDiagnostic = noop;
+        }
         configFileCache.set(configFilePath, parsed || diagnostic!);
         return parsed;
     }
@@ -1730,6 +1738,10 @@ namespace ts {
     }
 
     function invalidateProject(state: SolutionBuilderState, resolved: ResolvedConfigFilePath, reloadLevel: ConfigFileProgramReloadLevel) {
+        // If host implements getParsedCommandLine, we cant get list of files from parseConfigFileHost
+        if (state.host.getParsedCommandLine && reloadLevel === ConfigFileProgramReloadLevel.Partial) {
+            reloadLevel = ConfigFileProgramReloadLevel.Full;
+        }
         if (reloadLevel === ConfigFileProgramReloadLevel.Full) {
             state.configFileCache.delete(resolved);
             state.buildOrder = undefined;
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index b9d1f1ffab..01cef9552d 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -4591,6 +4591,7 @@ declare namespace ts {
         getModifiedTime(fileName: string): Date | undefined;
         setModifiedTime(fileName: string, date: Date): void;
         deleteFile(fileName: string): void;
+        getParsedCommandLine?(fileName: string): ParsedCommandLine | undefined;
         reportDiagnostic: DiagnosticReporter;
         reportSolutionBuilderStatus: DiagnosticReporter;
         afterProgramEmitAndDiagnostics?(program: T): void;
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index a140501c41..ce0e7b81c8 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -4591,6 +4591,7 @@ declare namespace ts {
         getModifiedTime(fileName: string): Date | undefined;
         setModifiedTime(fileName: string, date: Date): void;
         deleteFile(fileName: string): void;
+        getParsedCommandLine?(fileName: string): ParsedCommandLine | undefined;
         reportDiagnostic: DiagnosticReporter;
         reportSolutionBuilderStatus: DiagnosticReporter;
         afterProgramEmitAndDiagnostics?(program: T): void;