added `-X` for excluding sets of extensions. `-X` is to `-E` as `-x` is to `-e`.

CHANGELOG.md

@@ -4,10 +4,11 @@ Dates are given in YYYY-MM-DD format.
 ## v0.2
 ### v0.2.14 (2021-xx-yy)
 #### Features
-- Added `-x`/`--exclude` flag for excluding file extensions (overrides `-e` or `-E`)
-
+- Added `-x`/`--exclude` flag for excluding file extensions (overrides `-e` or `-E` - `-E images -x jpg` scans all image
+  files, except ".jpg" files)
+- Added `-X`/`--exclude-set` flag for excluding sets of files (like `-E`)
 #### Other
-- Publish my fork of ['mime_guess'] as ['new_mime_guess'], allowing it to be used properly with
+- Published my fork of ['mime_guess'] as ['new_mime_guess'], allowing it to be used properly with
   [crates.io](https://crates.io)
 
 ### v0.2.13 (2021-04-26)
@@ -152,5 +153,5 @@ Initial commit!
 [`clap`]: https://crates.io/crates/clap
 [`infer`]: https://crates.io/crates/infer
 [`mime_guess`]: https://crates.io/crates/mime_guess
-[`new_mime_guess`]: https://crates.io/crates/mime_guess
-[`snailquote`]: https://crates.io/crates/snailquote
+[`new_mime_guess`]: https://crates.io/crates/new_mime_guess
+[`snailquote`]: https://crates.io/crates/snailquote

src/parameters.rs

@@ -55,7 +55,9 @@ pub struct Parameters {
 	#[clap(short = 'x', long, use_delimiter = true, require_delimiter = true)]
 	pub exclude: Option<Vec<StringType>>,
 
-	// TODO: -X/--exclude-set - allows you to exclude all extensions in a set, e.g. "-X documents"
+	/// Exclude files using a preset list of extensions.
+	#[clap(short = 'X', long, arg_enum)]
+	pub exclude_set: Option<ExtensionSet>,
 
 	/// Don't skip hidden files and directories.
 	/// Even if this flag is not present, fif will still recurse into a hidden root directory - for example, `fif
@@ -133,10 +135,26 @@ impl Parameters {
 	}
 
 	pub fn excluded_extensions(&self) -> Option<Vec<&str>> {
-		self
-			.exclude
-			.as_ref()
-			.map(|exclude| exclude.iter().map(|ext| ext.as_str()).collect())
+		// start with an empty vec
+		let mut excluded = vec![];
+		if let Some(exclude) = self.exclude.as_ref() {
+			// add extensions excluded by `-x`
+			excluded.append(&mut exclude.iter().map(|ext| ext.as_str()).collect());
+		}
+
+		if let Some(exclude_set) = &self.exclude_set {
+			// add extensions excluded by `-X`
+			excluded.append(&mut exclude_set.extensions());
+		}
+
+		if excluded.is_empty() {
+			// no extensions to exclude - return none
+			None
+		} else {
+			// excluded doesn't sound like a word anymore
+			// tongue twister: enter X-options' excellent extension exclusion
+			Some(excluded)
+		}
 	}
 
 	pub const fn get_scan_opts(&self) -> ScanOpts {

src/tests/mod.rs

@@ -7,10 +7,13 @@ use crate::{extension_from_path, scan_directory, scan_from_walkdir};
 
 use mime_guess::mime::{APPLICATION_OCTET_STREAM, APPLICATION_PDF, IMAGE_JPEG, IMAGE_PNG};
 use mime_guess::Mime;
+use crate::parameters::Parameters;
+use clap::Clap;
 
 use std::collections::HashMap;
 use std::ffi::OsStr;
 use std::path::Path;
+use crate::parameters::ExtensionSet;
 
 const JPEG_BYTES: &[u8] = b"\xFF\xD8\xFF";
 const PNG_BYTES: &[u8] = b"\x89\x50\x4E\x47\x0D\x0A\x1A\x0A";
@@ -167,8 +170,7 @@ fn simple_directory() {
 #[test]
 /// Ensure that command line argument parsing works correctly - flags are interpreted, booleans are set, and so on.
 fn argument_parsing() {
-	use crate::parameters::{Parameters, ScanOpts};
-	use clap::Clap;
+	use crate::parameters::ScanOpts;
 
 	// pass `-f`, which enables following symlinks, and `-E images`, which scans files with image extensions
 	let args: Parameters = Parameters::parse_from(vec!["fif", "-f", "-E", "images"]);
@@ -204,11 +206,8 @@ fn argument_parsing() {
 }
 
 #[test]
-/// Ensure exclude overrides `-e` and `-E`.
+/// Ensure the `exclude` flag (`-x`) overrides `-e` and `-E`.
 fn exclude_overrides() {
-	use crate::parameters::Parameters;
-	use clap::Clap;
-
 	// pass `-E images`, which includes many image extensions, and `-x jpg,png`, which should remove "jpg" and "png" from
 	// the extensions list
 	let args: Parameters = Parameters::parse_from(vec!["fif", "-x", "jpg,png", "-E", "images"]);
@@ -232,12 +231,42 @@ fn exclude_overrides() {
 	assert!(extensions.contains(&"jkl"));
 }
 
+#[test]
+/// Ensure the `exclude_set` flag (`-X`) overrides `-e`.
+fn exclude_set_overrides_includes() {
+	// pass `-e jpg,flac` and `-X images` -- which should produce the equivalent of `-e flag`
+	let args: Parameters = Parameters::parse_from(vec!["fif", "-e", "jpg,flac", "-X", "images"]);
+	let extensions = args.extensions();
+	assert!(extensions.is_some(), "Extensions should be set!");
+	let mut extensions = extensions.unwrap().into_iter();
+
+	assert_eq!(extensions.next(), Some("flac"), "Extensions should contain flac!");
+	assert_eq!(extensions.next(), None, "Too many extensions!");
+}
+
+#[test]
+/// Ensure the `exclude_set` flag (`-X`) overrides `-E`.
+fn exclude_set_overrides_include_set() {
+	// pass `-E media` and `-X images` -- which should produce the equivalent of `-E audio,videos`
+	let args: Parameters = Parameters::parse_from(vec!["fif", "-E", "media", "-X", "images"]);
+	let extensions = args.extensions();
+	assert!(extensions.is_some(), "Extensions should be set!");
+	let extensions = extensions.unwrap();
+
+	// ensure all of audio and video's extensions are here
+	for &ext in ExtensionSet::Audio.extensions().iter().chain(ExtensionSet::Videos.extensions().iter()) {
+		assert!(extensions.contains(&ext), "Extensions should contain {}!", ext)
+	}
+
+	// ensure all of images' extensions are excluded
+	for ext in ExtensionSet::Images.extensions() {
+		assert!(!extensions.contains(&ext), "Extensions should not contain {}!", ext)
+	}
+}
+
 #[test]
 /// Ensure that badly formed command line arguments are rejected.
 fn rejects_bad_args() {
-	use crate::parameters::Parameters;
-
-	use clap::Clap;
 	let tests = [
 		// Non-existent flags:
 		vec!["fif", "-abcdefghijklmnopqrstuvwxyz"],