Add quickinstall support

src/fetchers.rs

@@ -1,17 +1,17 @@
 use std::path::Path;
 
 pub use gh_release::*;
+pub use quickinstall::*;
 
 use crate::PkgMeta;
 
 mod gh_release;
+mod quickinstall;
 
 #[async_trait::async_trait]
 pub trait Fetcher {
     /// Create a new fetcher from some data
-    async fn new(data: &Data) -> Result<Self, anyhow::Error>
-    where
-        Self: std::marker::Sized;
+    async fn new(data: &Data) -> Result<Box<Self>, anyhow::Error> where Self: Sized;
 
     /// Fetch a package
     async fn fetch(&self, dst: &Path) -> Result<(), anyhow::Error>;
@@ -21,10 +21,32 @@ pub trait Fetcher {
 }
 
 /// Data required to fetch a package
+#[derive(Debug)]
 pub struct Data {
     pub name: String,
     pub target: String,
     pub version: String,
     pub repo: Option<String>,
     pub meta: PkgMeta,
+}
+
+#[derive(Default)]
+pub struct MultiFetcher {
+    fetchers: Vec<Box<dyn Fetcher>>,
+}
+
+impl MultiFetcher {
+    pub fn add(&mut self, fetcher: Box<dyn Fetcher>) {
+        self.fetchers.push(fetcher);
+    }
+
+    pub async fn first_available(&self) -> Option<&dyn Fetcher> {
+        for fetcher in &self.fetchers {
+            if fetcher.check().await.unwrap_or(false) {
+                return Some(&**fetcher);
+            }
+        }
+        
+        None
+    }
 }