feat(content): added a new command to extract content from a file

README.md

@@ -27,6 +27,14 @@ markdown verb *.markdown
 markdowny version
 ```
 
+### content
+
+> Extract the content from one or more files.
+
+```sh
+markdowny content *.markdown
+```
+
 ### count
 
 > Counts the number of words excluding the YAML header and displays it.

src/tools/content.ts

@@ -0,0 +1,40 @@
+import * as _ from "lodash";
+import * as fs from "fs";
+import * as scanner from "../scanner";
+import * as yargs from "yargs";
+
+export var command = "content";
+export var describe = "Extracts the content of the file without metadata";
+
+export function builder(yargs: yargs.Arguments)
+{
+    return yargs
+        .help("help")
+
+        .option(
+            "output",
+            {
+                alias: "o",
+                default: "-",
+                describe: "Write output to a file or `-` for standard out",
+            }
+        )
+
+        .demand(1);
+}
+
+export function handler(argv: any)
+{
+    // Parse through the files and retrieve the metadata.
+    var files = argv._.splice(1);
+    var data: any = scanner.scanFiles(argv, files);
+    var output = data.map(x => x.__content).join("\n");
+
+    // Figure out where to write.
+    if (argv.output === "-")
+    {
+        console.log(output);
+    } else {
+        fs.writeFileSync(argv.output, Buffer.from(output, "utf-8"));
+    }
+}