[LavaMoat] improve policy generation performance in dev workflow (#16338)

* npm scripts - rename lavamoat:background to lavamoat:webapp

* lavamoat - generate webapp policy - add devMode flag to run in node for speed

* lavamoat - generate webapp policy - dont lint fences

* lint fix

Author: kumavis

development/generate-lavamoat-policies.js

@@ -11,7 +11,7 @@ start().catch((error) => {
 
 async function start() {
   const {
-    argv: { buildTypes, parallel },
+    argv: { buildTypes, parallel, devMode },
   } = yargs(hideBin(process.argv)).usage(
     '$0 [options]',
     'Generate the LavaMoat policy file for one more more build types.',
@@ -31,13 +31,22 @@ async function start() {
           description: 'Whether to generate policies in parallel.',
           type: 'boolean',
         })
+        .option('devMode', {
+          alias: ['d'],
+          default: false,
+          demandOption: true,
+          description:
+            'Whether to run the process under lavamoat (devMode=false) or node (devMode=true)',
+          type: 'boolean',
+        })
         .strict(),
   );
 
+  const buildCommand = devMode ? 'build:dev' : 'build';
   await concurrently(
     (Array.isArray(buildTypes) ? buildTypes : [buildTypes]).map(
       (buildType) => ({
-        command: `yarn build scripts:dist --policy-only --build-type=${buildType}`,
+        command: `yarn ${buildCommand} scripts:dist --policy-only --lint-fence-files=false --build-type=${buildType}`,
         env: {
           WRITE_AUTO_POLICY: 1,
         },

package.json

@@ -73,10 +73,10 @@
     "lavamoat:build": "lavamoat development/build/index.js --policy lavamoat/build-system/policy.json --policyOverride lavamoat/build-system/policy-override.json",
     "lavamoat:build:auto": "yarn lavamoat:build --writeAutoPolicy",
     "lavamoat:debug:build": "yarn lavamoat:build --writeAutoPolicyDebug --policydebug lavamoat/build-system/policy-debug.json",
-    "lavamoat:background:auto": "node ./development/generate-lavamoat-policies.js",
-    "lavamoat:background:auto:ci": "node ./development/generate-lavamoat-policies.js --parallel=false",
-    "lavamoat:auto": "yarn lavamoat:build:auto && yarn lavamoat:background:auto",
-    "lavamoat:auto:ci": "yarn lavamoat:build:auto && yarn lavamoat:background:auto:ci",
+    "lavamoat:webapp:auto": "node ./development/generate-lavamoat-policies.js --devMode=true",
+    "lavamoat:webapp:auto:ci": "node ./development/generate-lavamoat-policies.js --parallel=false",
+    "lavamoat:auto": "yarn lavamoat:build:auto && yarn lavamoat:webapp:auto",
+    "lavamoat:auto:ci": "yarn lavamoat:build:auto && yarn lavamoat:webapp:auto:ci",
     "ts-migration:enumerate": "ts-node development/ts-migration-dashboard/scripts/write-list-of-files-to-convert.ts",
     "ts-migration:dashboard:watch": "ts-node development/ts-migration-dashboard/scripts/build.ts --watch",
     "ts-migration:dashboard:build": "ts-node development/ts-migration-dashboard/scripts/build.ts",