Add support for cpio (#590)

Author: dcfreire

core.d.ts

@@ -147,6 +147,7 @@ export type FileExtension =
 	| 'parquet'
 	| 'class'
 	| 'arj'
+	| 'cpio'
 	; // eslint-disable-line semi-style
 
 export type MimeType =
@@ -290,6 +291,7 @@ export type MimeType =
 	| 'application/x-parquet'
 	| 'application/java-vm'
 	| 'application/x-arj'
+	| 'application/x-cpio'
 	; // eslint-disable-line semi-style
 
 export type FileTypeResult = {

core.js

@@ -149,6 +149,13 @@ class FileTypeParser {
 			};
 		}
 
+		if (this.check([0xC7, 0x71])) {
+			return {
+				ext: 'cpio',
+				mime: 'application/x-cpio',
+			};
+		}
+
 		if (this.check([0x60, 0xEA])) {
 			return {
 				ext: 'arj',
@@ -981,6 +988,13 @@ class FileTypeParser {
 			}
 		}
 
+		if (this.checkString('070707')) {
+			return {
+				ext: 'cpio',
+				mime: 'application/x-cpio',
+			};
+		}
+
 		// -- 7-byte signatures --
 
 		if (this.checkString('BLENDER')) {

fixture/fixture-ascii.cpio

@@ -199,7 +199,8 @@
 		"dwg",
 		"parquet",
 		"class",
-		"arj"
+		"arj",
+		"cpio"
 	],
 	"dependencies": {
 		"readable-web-to-node-stream": "^3.0.2",

fixture/fixture-bin.cpio

@@ -366,6 +366,7 @@ Returns a `Set<string>` of supported MIME types.
 - [`cfb`](https://en.wikipedia.org/wiki/Compound_File_Binary_Format) - Compount File Binary Format
 - [`chm`](https://en.wikipedia.org/wiki/Microsoft_Compiled_HTML_Help) - Microsoft Compiled HTML Help
 - [`class`](https://en.wikipedia.org/wiki/Java_class_file) - Java class file
+- [`cpio`](https://en.wikipedia.org/wiki/Cpio) - Cpio archive
 - [`cr2`](https://fileinfo.com/extension/cr2) - Canon Raw image file (v2)
 - [`cr3`](https://fileinfo.com/extension/cr3) - Canon Raw image file (v3)
 - [`crx`](https://developer.chrome.com/extensions/crx) - Google Chrome extension

package.json

@@ -144,6 +144,7 @@ export const extensions = [
 	'parquet',
 	'class',
 	'arj',
+	'cpio',
 ];
 
 export const mimeTypes = [
@@ -287,4 +288,5 @@ export const mimeTypes = [
 	'application/x-parquet',
 	'application/java-vm',
 	'application/x-arj',
+	'application/x-cpio',
 ];

readme.md

@@ -243,6 +243,10 @@ const names = {
 	dwg: [
 		'fixture-line-weights',
 	],
+	cpio: [
+		'fixture-bin',
+		'fixture-ascii',
+	],
 };
 
 // Define an entry here only if the file type has potential