fix: stream command output to stdout and stderr

Author: pvdlg

index.js

@@ -18,7 +18,7 @@ async function analyzeCommits(pluginConfig, context) {
   verifyConfig(pluginConfig);
 
   const stdout = await execScript(pluginConfig, context);
-  return stdout.trim() ? stdout : undefined;
+  return stdout || undefined;
 }
 
 async function verifyRelease(pluginConfig, context) {
@@ -49,7 +49,7 @@ async function publish(pluginConfig, context) {
   const stdout = await execScript(pluginConfig, context);
 
   try {
-    return stdout.trim() ? parseJson(stdout) : undefined;
+    return stdout ? parseJson(stdout) : undefined;
   } catch (err) {
     debug(stdout);
     debug(err);

lib/exec-script.js

@@ -6,9 +6,16 @@ module.exports = async ({cmd, ...config}, {cwd, env, stdout, stderr, logger, ...
 
   logger.log('Call script %s', script);
 
-  const {stdout: cmdStdout, stderr: cmdStderr} = await execa.shell(script, {cwd, env});
-  stdout.write(cmdStdout);
-  stderr.write(cmdStderr);
+  const result = execa.shell(script, {cwd, env});
 
-  return cmdStdout.trim();
+  result.stdout.pipe(
+    stdout,
+    {end: false}
+  );
+  result.stderr.pipe(
+    stderr,
+    {end: false}
+  );
+
+  return (await result).stdout.trim();
 };