AIFF support w/ infer backend

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
+### Added
+- AIFF (Audio Interchange File Format, a PCM audio format like WAV) detection to [`infer`]
 ### Other
 - Refactoring - split fif into main.rs and lib.rs, moved file-related functionality (directory scanning, etc.) into
 files module, removed string module, etc.

src/mime_db.rs

@@ -43,9 +43,23 @@ cfg_if! {
 					buf.len() >= 34 && buf.starts_with(b"RPA-") && buf[7] == b' ' && buf[24] ==b' '
 				});
 
+				info.add("audio/x-aiff", "aiff", |buf| {
+					// as added by https://github.com/bojand/infer/pull/48/files
+					// this should be removed when (if) that PR is accepted
+					buf.len() > 11
+          && buf[0] == 0x46
+          && buf[1] == 0x4F
+          && buf[2] == 0x52
+          && buf[3] == 0x4D
+          && buf[8] == 0x41
+          && buf[9] == 0x49
+          && buf[10] == 0x46
+          && buf[11] == 0x46
+				});
+
 				info.add("image/svg+xml", "svg", |buf| {
-					// before doing the moderately expensive SVG check, we should make sure that the input is actually SGML-ish
+					// before doing the moderately expensive SVG check, we should make sure that the input is actually SGML-ish,
-					// by "SGML-ish", i mean starts with anywhere from zero to ∞-1 whitespace characters, and then a less than sign,
+					// by which i mean, starts with anywhere from zero to ∞-1 whitespace characters, and then a less than sign,
 					// and then there's some other stuff we don't care about right now
 
 					// so, here comes our fancy pants """""SGML-ish validator"""""
@@ -72,9 +86,6 @@ cfg_if! {
 						.any(|buf| identifiers.iter().any(|id| buf.starts_with(id)))
 				});
 
-				// unmut
-				let info = info;
-
 				Self { db: info }
 			}
 

src/parameters.rs

@@ -30,8 +30,6 @@ pub enum OutputFormat {
 	Json,
 }
 
-// TODO: convert this to macro style?: https://docs.rs/clap/3.0.0-beta.2/clap/index.html#using-macros
-
 #[derive(Clap, Debug)]
 #[allow(clippy::struct_excessive_bools)]
 #[clap(