begone, proc_macro! removes a bunch of dependencies that came through darling.

Cargo.lock

@@ -6,15 +6,6 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
 
-[[package]]
-name = "async-mutex"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "479db852db25d9dbf6204e6cb6253698f175c15726470f78af0d918e99d6156e"
-dependencies = [
- "event-listener",
-]
-
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -44,32 +35,10 @@ version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5e2afe73808fbaac302e39c9754bfc3c4b4d0f99c9c240b9f4e4efc841ad1b74"
 dependencies = [
- "async-mutex",
- "cached_proc_macro",
- "cached_proc_macro_types",
  "hashbrown",
  "once_cell",
 ]
 
-[[package]]
-name = "cached_proc_macro"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf857ae42d910aede5c5186e62684b0d7a597ce2fe3bd14448ab8f7ef439848c"
-dependencies = [
- "async-mutex",
- "cached_proc_macro_types",
- "darling",
- "quote",
- "syn",
-]
-
-[[package]]
-name = "cached_proc_macro_types"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3a4f925191b4367301851c6d99b09890311d74b0d43f274c0b34c86d308a3663"
-
 [[package]]
 name = "cfg-if"
 version = "0.1.10"
@@ -166,41 +135,6 @@ dependencies = [
  "lazy_static",
 ]
 
-[[package]]
-name = "darling"
-version = "0.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d706e75d87e35569db781a9b5e2416cff1236a47ed380831f959382ccd5f858"
-dependencies = [
- "darling_core",
- "darling_macro",
-]
-
-[[package]]
-name = "darling_core"
-version = "0.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0c960ae2da4de88a91b2d920c2a7233b400bc33cb28453a2987822d8392519b"
-dependencies = [
- "fnv",
- "ident_case",
- "proc-macro2",
- "quote",
- "strsim",
- "syn",
-]
-
-[[package]]
-name = "darling_macro"
-version = "0.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9b5a2f4ac4969822c62224815d069952656cadc7084fdca9751e6d959189b72"
-dependencies = [
- "darling_core",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "dirs-next"
 version = "2.0.0"
@@ -239,12 +173,6 @@ dependencies = [
  "termcolor",
 ]
 
-[[package]]
-name = "event-listener"
-version = "2.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7531096570974c3a9dcf9e4b8e1cede1ec26cf5046219fb3b9d897503b9be59"
-
 [[package]]
 name = "fif"
 version = "0.1.0"
@@ -261,12 +189,6 @@ dependencies = [
  "xdg-mime",
 ]
 
-[[package]]
-name = "fnv"
-version = "1.0.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
-
 [[package]]
 name = "getrandom"
 version = "0.2.2"
@@ -308,12 +230,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "ident_case"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
-
 [[package]]
 name = "indexmap"
 version = "1.6.1"
@@ -554,12 +470,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
-[[package]]
-name = "strsim"
-version = "0.9.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6446ced80d6c486436db5c078dde11a9f73d42b57fb273121e160b84f63d894c"
-
 [[package]]
 name = "syn"
 version = "1.0.60"

Cargo.toml

@@ -34,7 +34,6 @@ features = ["termcolor", "atty"]
 [dependencies.cached]
 version = "0.23.0"
 default-features = false
-features = ["proc_macro"]
 
 [profile.release]
 lto = "thin"

src/inspectors.rs

@@ -1,11 +1,13 @@
-use xdg_mime::SharedMimeInfo;
-use std::path::Path;
-use std::io;
-use mime_guess::Mime;
 use std::fs::File;
+use std::io;
 use std::io::{Read, Seek, SeekFrom};
+use std::path::Path;
+
+use cached::cached;
+use mime_guess::Mime;
 use smartstring::alias::String;
-use cached::proc_macro::cached;
+use xdg_mime::SharedMimeInfo;
+
 // use log::{debug, warn};
 
 // from looking at the files in https://github.com/bojand/infer/tree/master/src/matchers, the format with the largest
@@ -41,17 +43,20 @@ pub fn mime_type(db: &SharedMimeInfo, path: &Path) -> io::Result<Option<Mime>, >
 	Ok(db.get_mime_type_for_data(&buffer).map(|m| m.0))
 }
 
-#[cached]
 // TODO: avoid cloning mime if possible, although i don't really see how it would be - maybe instead of passing the mime
 // object, pass a hash of it?
-pub fn mime_extension_lookup(mime: Mime) -> Option<Vec<String>> {
+cached! {
-	if mime == mime_guess::mime::IMAGE_JPEG {
+	MIMEXT;
-		// jpeg files are given the primary extension "jpe", due to the extension list being stored in alphabetical order.
+	fn mime_extension_lookup(mime: Mime) -> Option<Vec<String>> = {
-		// to handle this particular case, return a custom vector consisting of just "jpg" and "jpeg".
+		if mime == mime_guess::mime::IMAGE_JPEG {
-		return Some(vec![String::from("jpg"), String::from("jpeg")]);
+			// jpeg files are given the primary extension "jpe", due to the extension list being stored in alphabetical order.
-	}
+			// to handle this particular case, return a custom vector consisting of just "jpg" and "jpeg".
-	match mime_guess::get_mime_extensions(&mime) { // get a list of possible extensions for this mime type
+			return Some(vec![String::from("jpg"), String::from("jpeg")]);
-		Some(exts) => Some(exts.iter().map(|e| String::from(*e)).collect()),
+		}
-		None => None
+		match mime_guess::get_mime_extensions(&mime) { // get a list of possible extensions for this mime type
+			Some(exts) => Some(exts.iter().map(|e| String::from(*e)).collect()),
+			None => None
+		}
 	}
 }
+