feat: add flag to skip env var fetching (#6723)

Author: davbree

src/commands/base-command.ts

@@ -596,7 +596,11 @@ export default class BaseCommand extends Command {
       token,
       ...apiUrlOpts,
     })
-    const { buildDir, config, configPath, env, repositoryRoot, siteInfo } = cachedConfig
+    const { buildDir, config, configPath, repositoryRoot, siteInfo } = cachedConfig
+    let { env } = cachedConfig
+    if (flags.offlineEnv) {
+      env = {}
+    }
     env.NETLIFY_CLI_VERSION = { sources: ['internal'], value: version }
     const normalizedConfig = normalizeConfig(config)
 
@@ -661,7 +665,10 @@ export default class BaseCommand extends Command {
       // Configuration from netlify.[toml/yml]
       config: normalizedConfig,
       // Used to avoid calling @netlify/config again
-      cachedConfig,
+      cachedConfig: {
+        ...cachedConfig,
+        env,
+      },
       // global cli config
       globalConfig,
       // state of current site dir

src/commands/dev/dev.ts

@@ -118,7 +118,7 @@ export const dev = async (options: OptionValues, command: BaseCommand) => {
 
   env[BLOBS_CONTEXT_VARIABLE] = { sources: ['internal'], value: encodeBlobsContext(blobsContext) }
 
-  if (!options.offline) {
+  if (!options.offline && !options.offlineEnv) {
     env = await getEnvelopeEnv({ api, context: options.context, env, siteInfo })
     log(`${NETLIFYDEVLOG} Injecting environment variable values for ${chalk.yellow('all scopes')}`)
   }
@@ -275,6 +275,9 @@ export const createDevCommand = (program: BaseCommand) => {
     .option('-d ,--dir <path>', 'dir with static files')
     .option('-f ,--functions <folder>', 'specify a functions folder to serve')
     .option('-o ,--offline', 'disables any features that require network access')
+    .addOption(
+      new Option('--offline-env', 'disables fetching environment variables from the Netlify API').hideHelp(true),
+    )
     .addOption(
       new Option(
         '--internal-disable-edge-functions',