Bug 1880764 - Initial TypeScript tooling r=mossop,Standard8

* Initial tools/ts setup.
* Mach commands for buidling xpcom related typelibs.
* Mach command for updating the typelib references.
* Mach command for type-checking js projects.

Also included the dom typelib for reference.

Differential Revision: https://phabricator.services.mozilla.com/D197620

.gitignore

@@ -83,6 +83,7 @@ browser/components/asrouter/node_modules/
 browser/components/newtab/node_modules/
 browser/components/aboutwelcome/node_modules/
 tools/esmify/node_modules/
+tools/ts/node_modules/
 
 # Ignore newtab component build assets
 browser/components/newtab/logs/
@@ -333,6 +334,9 @@ tools/esmify/jscodeshift.cmd
 tools/esmify/jscodeshift.ps1
 tools/esmify/package-lock.json
 
+# Ignore TypeScript declarations reference file updated by tooling.
+tools/@types/index.d.ts
+
 # Ignore support files for en-US dictionary updates
 extensions/spellcheck/locales/en-US/hunspell/dictionary-sources/scowl
 extensions/spellcheck/locales/en-US/hunspell/dictionary-sources/support_files/

.hgignore

@@ -75,6 +75,7 @@
 ^browser/components/newtab/node_modules/
 ^browser/components/aboutwelcome/node_modules/
 ^tools/esmify/node_modules/
+^tools/ts/node_modules/
 
 # Ignore newtab component build assets
 ^browser/components/newtab/logs/
@@ -325,6 +326,9 @@ tps_result\.json$
 ^tools/esmify/jscodeshift\.ps1
 ^tools/esmify/package-lock\.json
 
+# Ignore TypeScript declarations reference file updated by tooling.
+^tools/@types/index.d.ts
+
 # Ignore support files for en-US dictionary updates
 ^extensions/spellcheck/locales/en-US/hunspell/dictionary-sources/scowl
 ^extensions/spellcheck/locales/en-US/hunspell/dictionary-sources/support_files/

.prettierignore

@@ -1488,5 +1488,6 @@ toolkit/components/uniffi-js/UniFFIFixtureScaffolding.cpp
 toolkit/components/uniffi-bindgen-gecko-js/fixtures/generated
 tools/browsertime/package.json
 tools/browsertime/package-lock.json
+tools/ts/error_list.json
 try_task_config.json
 xpcom/idl-parser/xpidl/fixtures/xpctest.d.json

package.json

@@ -5,6 +5,7 @@
   "license": "MPL-2.0",
   "devDependencies": {
     "@microsoft/eslint-plugin-sdl": "0.2.2",
+    "@types/gecko": "file:tools/@types",
     "eslint": "8.57.0",
     "eslint-config-prettier": "8.8.0",
     "eslint-plugin-eslint-plugin": "5.4.0",

python/mach/mach/command_util.py

@@ -204,6 +204,7 @@ def __init__(
     ),
     "tps-build": MachCommandReference("testing/tps/mach_commands.py"),
     "try": MachCommandReference("tools/tryselect/mach_commands.py"),
+    "ts": MachCommandReference("tools/ts/mach_commands.py"),
     "uniffi": MachCommandReference(
         "toolkit/components/uniffi-bindgen-gecko-js/mach_commands.py"
     ),