feat(library): Add constants for plugin paths

Cargo.lock

@@ -22,9 +22,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.42"
+version = "1.0.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "595d3cfa7a60d4555cb5067b99f07142a08ea778de5cf993f7b75c7d8fabc486"
+checksum = "28ae2b3dec75a406790005a200b1bd89785afc02517a00ca99ecfe093ee9e6cf"
 
 [[package]]
 name = "async-channel"
@@ -245,6 +245,26 @@ dependencies = [
  "cache-padded",
 ]
 
+[[package]]
+name = "const_format"
+version = "0.2.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49aad96768495418a04c9349327f32f2cd7e9bf8ac6b142534466048721c8ff5"
+dependencies = [
+ "const_format_proc_macros",
+]
+
+[[package]]
+name = "const_format_proc_macros"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29c36c619c422113552db4eb28cddba8faa757e33f758cc3415bd2885977b591"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
 [[package]]
 name = "darling"
 version = "0.13.0"
@@ -762,6 +782,7 @@ name = "pop-launcher"
 version = "1.0.0"
 dependencies = [
  "blocking",
+ "const_format",
  "futures-lite",
  "futures_codec",
  "serde",

Cargo.toml

@@ -11,9 +11,10 @@ resolver = "2"
 members = ["bin", "plugins", "service"]
 
 [dependencies]
+blocking = "1"
+const_format = "0.2"
+futures_codec = "0.4"
+futures-lite = "1"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 serde_with = "1"
-futures-lite = "1"
-futures_codec = "0.4"
-blocking = "1"

src/codec.rs

@@ -1,7 +1,7 @@
+use blocking::Unblock;
 use futures_codec::{FramedRead, LinesCodec};
 use futures_lite::{AsyncRead, Stream, StreamExt};
 use serde::Deserialize;
-use blocking::Unblock;
 use std::io;
 
 /// stdin with AsyncRead support

src/lib.rs

@@ -2,8 +2,35 @@ mod codec;
 
 pub use self::codec::*;
 
+use const_format::concatcp;
 use serde::{Deserialize, Serialize};
-use std::{borrow::Cow, path::PathBuf};
+use std::{borrow::Cow, path::{Path, PathBuf}};
+
+pub const LOCAL: &str = "~/.local/share/pop-launcher";
+pub const LOCAL_PLUGINS: &str = concatcp!(LOCAL, "/plugins");
+
+pub const SYSTEM: &str = "/etc/pop-launcher";
+pub const SYSTEM_PLUGINS: &str = concatcp!(SYSTEM, "/plugins");
+
+pub const DISTRIBUTION: &str = "/usr/lib/pop-launcher";
+pub const DISTRIBUTION_PLUGINS: &str = concatcp!(DISTRIBUTION, "/plugins");
+
+pub const PLUGIN_PATHS: &[&str] = &[LOCAL_PLUGINS, SYSTEM_PLUGINS, DISTRIBUTION_PLUGINS];
+
+pub fn plugin_paths() -> impl Iterator<Item = Cow<'static, Path>> {
+    PLUGIN_PATHS.iter()
+        .map(|path| {
+            #[allow(deprecated)]
+            if let Some(path) = path.strip_prefix("~/") {
+                let path = std::env::home_dir()
+                    .expect("user does not have home dir")
+                    .join(path);
+                Cow::Owned(path)
+            } else {
+                Cow::Borrowed(Path::new(path))
+            }
+        })
+}
 
 /// u32 value defining the generation of an indice.
 pub type Generation = u32;
@@ -57,7 +84,6 @@ pub struct PluginSearchResult {
     pub window: Option<(Generation, Indice)>,
 }
 
-
 // Sent to the input pipe of the launcher service, and disseminated to its plugins.
 #[derive(Debug, Deserialize, Serialize)]
 pub enum Request {