fix(typescript): add the tsBuildInfoFile option to ts_project

Like other options that affect tsc outputs, Bazel needs to know the value from the tsconfig if its set.
Add it to our validator so there's a buildozer command to sync the option value into the BUILD file.

Fixes bazel-contrib#2137

packages/typescript/internal/ts_project.bzl

@@ -116,6 +116,10 @@ def _ts_project_impl(ctx):
 
     outputs = json_outs + ctx.outputs.js_outs + ctx.outputs.map_outs + ctx.outputs.typings_outs + ctx.outputs.typing_maps_outs
     if ctx.outputs.buildinfo_out:
+        arguments.add_all([
+            "--tsBuildInfoFile",
+            ctx.outputs.buildinfo_out.path,
+        ])
         outputs.append(ctx.outputs.buildinfo_out)
     runtime_outputs = json_outs + ctx.outputs.js_outs + ctx.outputs.map_outs
     typings_outputs = ctx.outputs.typings_outs + ctx.outputs.typing_maps_outs + [s for s in ctx.files.srcs if s.path.endswith(".d.ts")]
@@ -184,6 +188,7 @@ def _validate_options_impl(ctx):
         emit_declaration_only = ctx.attr.emit_declaration_only,
         source_map = ctx.attr.source_map,
         incremental = ctx.attr.incremental,
+        ts_build_info_file = ctx.attr.ts_build_info_file,
     ).to_json()])
 
     run_node(
@@ -210,6 +215,7 @@ validate_options = rule(
         "incremental": attr.bool(),
         "source_map": attr.bool(),
         "target": attr.string(),
+        "ts_build_info_file": attr.string(),
         "tsconfig": attr.label(mandatory = True, allow_single_file = [".json"]),
         "validator": attr.label(default = Label("//packages/typescript/bin:ts_project_options_validator"), executable = True, cfg = "host"),
     },
@@ -236,6 +242,7 @@ def ts_project_macro(
         composite = False,
         incremental = False,
         emit_declaration_only = False,
+        ts_build_info_file = None,
         tsc = None,
         validate = True,
         declaration_dir = None,
@@ -394,6 +401,8 @@ def ts_project_macro(
             Instructs Bazel to expect a `.tsbuildinfo` output.
         emit_declaration_only: if the `emitDeclarationOnly` bit is set in the tsconfig.
             Instructs Bazel *not* to expect `.js` or `.js.map` outputs for `.ts` sources.
+        ts_build_info_file: the user-specified value of `tsBuildInfoFile` from the tsconfig.
+            Helps Bazel to predict the path where the .tsbuildinfo output is written.
 
         **kwargs: passed through to underlying rule, allows eg. visibility, tags
     """
@@ -416,12 +425,14 @@ def ts_project_macro(
             composite = composite,
             incremental = incremental,
             emit_declaration_only = emit_declaration_only,
+            ts_build_info_file = ts_build_info_file,
             tsconfig = tsconfig,
             extends = extends,
         )
         extra_deps.append("_validate_%s_options" % name)
 
     typings_out_dir = declaration_dir if declaration_dir else out_dir
+    tsbuildinfo_path = ts_build_info_file if ts_build_info_file else tsconfig[:-5] + ".tsbuildinfo"
 
     ts_project(
         name = name,
@@ -437,7 +448,7 @@ def ts_project_macro(
         map_outs = _out_paths(srcs, out_dir, root_dir, ".js.map") if source_map and not emit_declaration_only else [],
         typings_outs = _out_paths(srcs, typings_out_dir, root_dir, ".d.ts") if declaration or composite else [],
         typing_maps_outs = _out_paths(srcs, typings_out_dir, root_dir, ".d.ts.map") if declaration_map else [],
-        buildinfo_out = tsconfig[:-5] + ".tsbuildinfo" if composite or incremental else None,
+        buildinfo_out = tsbuildinfo_path if composite or incremental else None,
         tsc = tsc,
         **kwargs
     )

packages/typescript/internal/ts_project_options_validator.ts

@@ -1,3 +1,4 @@
+import {relative} from 'path';
 import * as ts from 'typescript';
 
 const diagnosticsHost: ts.FormatDiagnosticsHost = {
@@ -29,14 +30,37 @@ function main([tsconfigPath, output, target, attrsStr]: string[]): 0|1 {
 
   const failures: string[] = [];
   const buildozerCmds: string[] = [];
+
+  function getTsOption(option) {
+    if (typeof (options[option]) === 'string') {
+      // Currently the only string-typed options are filepaths.
+      // TypeScript will resolve these to a project path
+      // so when echoing that back to the user, we need to reverse that resolution.
+      // First turn //path/to/pkg:tsconfig into path/to/pkg
+      const packageDir = target.substr(2, target.indexOf(':') - 2);
+      return relative(packageDir, options[option] as string);
+    }
+    return options[option];
+  }
+
   function check(option: string, attr?: string) {
     attr = attr || option;
     // treat compilerOptions undefined as false
-    const optionVal = options[option] === undefined ? false : options[option];
-    if (optionVal !== attrs[attr]) {
+    const optionVal = getTsOption(option);
+    const match = optionVal === attrs[attr] ||
+        (optionVal === undefined && (attrs[attr] === false || attrs[attr] === ''));
+    if (!match) {
       failures.push(
           `attribute ${attr}=${attrs[attr]} does not match compilerOptions.${option}=${optionVal}`);
-      buildozerCmds.push(`set ${attr} ${optionVal ? 'True' : 'False'}`);
+      if (typeof (optionVal) === 'boolean') {
+        buildozerCmds.push(`set ${attr} ${optionVal ? 'True' : 'False'}`);
+      } else if (typeof (optionVal) === 'string') {
+        buildozerCmds.push(`set ${attr} \"${optionVal}\"`);
+      } else if (optionVal === undefined) {
+        // nothing to sync
+      } else {
+        throw new Error(`cannot check option ${option} of type ${typeof (option)}`);
+      }
     }
   }
 
@@ -46,6 +70,7 @@ function main([tsconfigPath, output, target, attrsStr]: string[]): 0|1 {
   check('composite');
   check('declaration');
   check('incremental');
+  check('tsBuildInfoFile', 'ts_build_info_file');
 
   if (failures.length > 0) {
     console.error(`ERROR: ts_project rule ${
@@ -70,6 +95,7 @@ function main([tsconfigPath, output, target, attrsStr]: string[]): 0|1 {
 // incremental:           ${attrs.incremental}
 // source_map:            ${attrs.source_map}
 // emit_declaration_only: ${attrs.emit_declaration_only}
+// ts_build_info_file:    ${attrs.ts_build_info_file}
 `,
       'utf-8');
   return 0;
@@ -81,4 +107,4 @@ if (require.main === module) {
   } catch (e) {
     console.error(process.argv[1], e);
   }
-}
+}

packages/typescript/test/ts_project/tsbuildinfofile/BUILD.bazel

@@ -0,0 +1,7 @@
+load("//packages/typescript:index.bzl", "ts_project")
+
+ts_project(
+    name = "tsconfig",
+    composite = True,
+    ts_build_info_file = "my.tsbuildinfo",
+)

packages/typescript/test/ts_project/tsbuildinfofile/a.ts

@@ -0,0 +1 @@
+export const a: string = '';

packages/typescript/test/ts_project/tsbuildinfofile/tsconfig.json

@@ -0,0 +1,7 @@
+{
+    "compilerOptions": {
+        "composite": true,
+        "tsBuildInfoFile": "my.tsbuildinfo",
+        "types": []
+    }
+}