add --mkdocs-config-file-name cli argument to the techdocs-cli serve command

Signed-off-by: Morgan Bentell <mbentell@spotify.com>

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

@@ -285,6 +285,10 @@ export function registerCommands(program: Command) {
       'Port for the preview app to be served on',
       defaultPreviewAppPort,
     )
+    .option(
+      '-c, --mkdocs-config-file-name <FILENAME>',
+      'Mkdocs config file name',
+    )
     .hook('preAction', command => {
       if (
         command.opts().previewAppPort !== defaultPreviewAppPort &&

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

@@ -65,11 +65,13 @@ export default async function serve(opts: OptionValues) {
   const mkdocsExpectedDevAddr = opts.docker
     ? mkdocsDockerAddr
     : mkdocsLocalAddr;
+  const mkdocsConfigFileName = opts.mkdocsConfigFileName;
+  const siteName = opts.siteName;
 
-  const { path: mkdocsYmlPath, configIsTemporary } = await getMkdocsYml(
-    './',
-    opts.siteName,
-  );
+  const { path: mkdocsYmlPath, configIsTemporary } = await getMkdocsYml('./', {
+    name: siteName,
+    mkdocsConfigFileName,
+  });
 
   let mkdocsServerHasStarted = false;
   const mkdocsLogFunc: LogFunc = data => {
@@ -104,6 +106,7 @@ export default async function serve(opts: OptionValues) {
     useDocker: opts.docker,
     stdoutLogFunc: mkdocsLogFunc,
     stderrLogFunc: mkdocsLogFunc,
+    mkdocsConfigFileName: mkdocsYmlPath,
   });
 
   // Wait until mkdocs server has started so that Backstage starts with docs loaded

packages/techdocs-cli/src/lib/mkdocsServer.ts

@@ -25,6 +25,7 @@ export const runMkdocsServer = async (options: {
   dockerOptions?: string[];
   stdoutLogFunc?: LogFunc;
   stderrLogFunc?: LogFunc;
+  mkdocsConfigFileName?: string;
 }): Promise<ChildProcess> => {
   const port = options.port ?? '8000';
   const useDocker = options.useDocker ?? true;
@@ -51,6 +52,9 @@ export const runMkdocsServer = async (options: {
         'serve',
         '--dev-addr',
         `0.0.0.0:${port}`,
+        ...(options.mkdocsConfigFileName
+          ? ['--config-file', options.mkdocsConfigFileName]
+          : []),
       ],
       {
         stdoutLogFunc: options.stdoutLogFunc,
@@ -59,8 +63,19 @@ export const runMkdocsServer = async (options: {
     );
   }
 
-  return await run('mkdocs', ['serve', '--dev-addr', `127.0.0.1:${port}`], {
-    stdoutLogFunc: options.stdoutLogFunc,
-    stderrLogFunc: options.stderrLogFunc,
-  });
+  return await run(
+    'mkdocs',
+    [
+      'serve',
+      '--dev-addr',
+      `127.0.0.1:${port}`,
+      ...(options.mkdocsConfigFileName
+        ? ['--config-file', options.mkdocsConfigFileName]
+        : []),
+    ],
+    {
+      stdoutLogFunc: options.stdoutLogFunc,
+      stderrLogFunc: options.stderrLogFunc,
+    },
+  );
 };