pass extra options to httpsnippet (pass through to the target) (#222)

Co-authored-by: Eric Reynolds <eric.reynolds@konghq.com>

Author: mahenzon

README.md

@@ -23,7 +23,7 @@ npm install --save httpsnippet
 
 ```
 
-  Usage: httpsnippet [options] <file>
+  Usage: httpsnippet [options] <files ...>
 
   Options:
 
@@ -32,6 +32,7 @@ npm install --save httpsnippet
     -t, --target <target>     target output
     -c, --client [client]     target client library
     -o, --output <directory>  write output to directory
+    -x, --extra [{"optionKey": "optionValue"}]  provide extra options for the target/client
 
 ```
 
@@ -63,6 +64,13 @@ snippets/
 └── endpoint-3.js
 ```
 
+provide extra options:
+
+```shell
+httpsnippet example.json --target http --output ./snippets -x '{"autoHost": false, "autoContentLength": false}'
+```
+
+
 ## API
 
 ### HTTPSnippet(source)

bin/httpsnippet

@@ -17,12 +17,23 @@ cmd
   .option('-t, --target <target>', 'target output')
   .option('-c, --client [client]', 'target client library')
   .option('-o, --output <directory>', 'write output to directory')
+  .option('-x, --extra [{"optionKey": "optionValue"}]', 'provide extra options for the target/client')
   .parse(process.argv)
 
 if (!cmd.args.length || !cmd.target) {
   cmd.help()
 }
 
+let extraOptions
+if (cmd.extra) {
+  try {
+    extraOptions = JSON.parse(cmd.extra)
+  } catch (e) {
+    console.error('%s failed to parse options %s (should be JSON)', chalk.red('✖'), chalk.cyan.bold(cmd.extra))
+    process.exit()
+  }
+}
+
 let dir
 if (cmd.output) {
   dir = path.resolve(cmd.output)
@@ -53,7 +64,7 @@ cmd.args.forEach(function (fileName) {
     })
 
     .then(function (snippet) {
-      return snippet.convert(cmd.target, cmd.client)
+      return snippet.convert(cmd.target, cmd.client, extraOptions)
     })
 
     .then(function (output) {