Feature: Impl opt-out options (#510)

Fixed #136

* Impl opt-out optioins in binstalk
* Replace field `Options::{gh_crate, quickinstall}_fetcher` with `resolver`
  which can determine order of resolver used.
* Add new field `Args::{disable_}strategies`
* Add new variant `BinstallError::InvalidStrategies`
* Add variant `BinstallError::NoFallbackToCargoInstall`
* Add code for supporting strategies in mod entry
* Test `--disable-strategies` in `tests.sh`
* Test for `--strategies` in `tests.sh`

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

crates/binstalk/src/errors.rs

@@ -310,6 +310,22 @@ pub enum BinstallError {
     #[diagnostic(severity(error), code(binstall::SourceFilePath))]
     EmptySourceFilePath,
 
+    /// Invalid strategies configured.
+    ///
+    /// - Code: `binstall::strategies`
+    /// - Exit: 93
+    #[error("Invalid strategies configured: {0}")]
+    #[diagnostic(severity(error), code(binstall::strategies))]
+    InvalidStrategies(&'static &'static str),
+
+    /// Fallback to `cargo-install` is disabled.
+    ///
+    /// - Code: `binstall::no_fallback_to_cargo_install`
+    /// - Exit: 94
+    #[error("Fallback to cargo-install is disabled")]
+    #[diagnostic(severity(error), code(binstall::no_fallback_to_cargo_install))]
+    NoFallbackToCargoInstall,
+
     /// A wrapped error providing the context of which crate the error is about.
     #[error("for crate {crate_name}")]
     CrateContext {
@@ -348,6 +364,8 @@ impl BinstallError {
             DuplicateSourceFilePath { .. } => 90,
             InvalidSourceFilePath { .. } => 91,
             EmptySourceFilePath => 92,
+            InvalidStrategies(..) => 93,
+            NoFallbackToCargoInstall => 94,
             CrateContext { error, .. } => error.exit_number(),
         };
 

crates/binstalk/src/ops.rs

@@ -1,14 +1,21 @@
 //! Concrete Binstall operations.
 
-use std::path::PathBuf;
+use std::{path::PathBuf, sync::Arc};
 
 use semver::VersionReq;
 
-use crate::{manifests::cargo_toml_binstall::PkgOverride, DesiredTargets};
+use crate::{
+    fetchers::{Data, Fetcher},
+    helpers::remote::Client,
+    manifests::cargo_toml_binstall::PkgOverride,
+    DesiredTargets,
+};
 
 pub mod install;
 pub mod resolve;
 
+pub type Resolver = fn(&Client, &Arc<Data>) -> Arc<dyn Fetcher>;
+
 pub struct Options {
     pub no_symlinks: bool,
     pub dry_run: bool,
@@ -18,4 +25,5 @@ pub struct Options {
     pub cli_overrides: PkgOverride,
     pub desired_targets: DesiredTargets,
     pub quiet: bool,
+    pub resolver: Vec<Resolver>,
 }

crates/binstalk/src/ops/resolve.rs

@@ -18,7 +18,7 @@ use crate::{
     bins,
     drivers::fetch_crate_cratesio,
     errors::BinstallError,
-    fetchers::{Data, Fetcher, GhCrateMeta, QuickInstall},
+    fetchers::{Data, Fetcher},
     helpers::{remote::Client, tasks::AutoAbortJoinHandle},
     manifests::cargo_toml_binstall::{Meta, PkgMeta},
 };
@@ -211,7 +211,7 @@ async fn resolve_inner(
                     meta: target_meta,
                 })
             })
-            .cartesian_product([GhCrateMeta::new, QuickInstall::new])
+            .cartesian_product(&opts.resolver)
             .map(|(fetcher_data, f)| {
                 let fetcher = f(&client, &fetcher_data);
                 (