fix(techdocs): do not copy docs/README.md as docs/index.md

Signed-off-by: Phil Kuang <pkuang@factset.com>

packages/techdocs-cli/src/commands/generate/generate.ts

@@ -42,6 +42,7 @@ export default async function generate(cmd: Command) {
   const omitTechdocsCorePlugin = cmd.omitTechdocsCoreMkdocsPlugin;
   const dockerImage = cmd.dockerImage;
   const pullImage = cmd.pull;
+  const legacyCopyReadmeMdToIndexMd = cmd.legacyCopyReadmeMdToIndexMd;
 
   logger.info(`Using source dir ${sourceDir}`);
   logger.info(`Will output generated files in ${outputDir}`);
@@ -56,6 +57,7 @@ export default async function generate(cmd: Command) {
         runIn: cmd.docker ? 'docker' : 'local',
         dockerImage,
         pullImage,
+        legacyCopyReadmeMdToIndexMd,
         mkdocs: {
           omitTechdocsCorePlugin,
         },

packages/techdocs-cli/src/commands/index.ts

@@ -59,6 +59,11 @@ export function registerCommands(program: CommanderStatic) {
       "Don't patch MkDocs file automatically with techdocs-core plugin.",
       false,
     )
+    .option(
+      '--legacyCopyReadmeMdToIndexMd',
+      'Attempt to ensure an index.md exists falling back to using <docs-dir>/README.md or README.md in case a default <docs-dir>/index.md is not provided.',
+      false,
+    )
     .alias('build')
     .action(lazy(() => import('./generate/generate').then(m => m.default)));