fix(http): enhance fetch_versions to to fallback to config for tool options

e2e/backend/test_http_version_list

@@ -20,3 +20,15 @@ if [[ ! $LATEST =~ ^[0-9]+\.[0-9]+\.[0-9]+ ]]; then
 	fail "upstream claude-code /latest returned unexpected value: '$LATEST'"
 fi
 assert "mise latest claude" "$LATEST"
+
+# Test that ls-remote works without registry or installed tool
+cat <<EOF >mise.toml
+[tools."http:zmx"]
+version = "0.2.0"
+version_list_url = "https://api.github.com/repos/neurosnap/zmx/tags"
+version_json_path = ".[].name"
+url = "https://zmx.sh/a/zmx-{{version}}-{{os()}}-{% if arch() == 'arm64' %}aarch64{% else %}x86_64{% endif %}.tar.gz"
+EOF
+
+mise cache clear
+assert_contains "mise ls-remote http:zmx" "0.2.0"

src/backend/http.rs

@@ -544,8 +544,12 @@ impl HttpBackend {
     // -------------------------------------------------------------------------
 
     /// Fetch versions from version_list_url if configured
-    async fn fetch_versions(&self) -> Result<Vec<String>> {
-        let opts = self.ba.opts();
+    async fn fetch_versions(&self, config: &Arc<Config>) -> Result<Vec<String>> {
+        let opts = if !self.ba.opts().contains_key("version_list_url") {
+            config.get_tool_opts(&self.ba).await?.unwrap_or_default()
+        } else {
+            self.ba.opts()
+        };
 
         let url = match opts.get("version_list_url") {
             Some(url) => url.clone(),
@@ -581,8 +585,8 @@ impl Backend for HttpBackend {
         &self.ba
     }
 
-    async fn _list_remote_versions(&self, _config: &Arc<Config>) -> Result<Vec<VersionInfo>> {
-        let versions = self.fetch_versions().await?;
+    async fn _list_remote_versions(&self, config: &Arc<Config>) -> Result<Vec<VersionInfo>> {
+        let versions = self.fetch_versions(config).await?;
         Ok(versions
             .into_iter()
             .map(|v| VersionInfo {

src/config/mod.rs

@@ -15,6 +15,7 @@ use tokio::{sync::OnceCell, task::JoinSet};
 use walkdir::WalkDir;
 
 use crate::backend::ABackend;
+use crate::cli::args::BackendArg;
 use crate::cli::version;
 use crate::config::config_file::idiomatic_version::IdiomaticVersionFile;
 use crate::config::config_file::min_version::MinVersionSpec;
@@ -27,7 +28,9 @@ use crate::file::display_path;
 use crate::shorthands::{Shorthands, get_shorthands};
 use crate::task::Task;
 use crate::task::task_file_providers::TaskFileProvidersBuilder;
-use crate::toolset::{ToolRequestSet, ToolRequestSetBuilder, ToolVersion, Toolset, install_state};
+use crate::toolset::{
+    ToolRequestSet, ToolRequestSetBuilder, ToolVersion, ToolVersionOptions, Toolset, install_state,
+};
 use crate::ui::style;
 use crate::{backend, dirs, env, file, lockfile, registry, runtime_symlinks, shims, timeout};
 
@@ -327,6 +330,15 @@ impl Config {
             .await
     }
 
+    pub async fn get_tool_opts(
+        self: &Arc<Self>,
+        backend_arg: &Arc<BackendArg>,
+    ) -> Result<Option<ToolVersionOptions>> {
+        let trs = self.get_tool_request_set().await?;
+        let tool_request = trs.iter().find(|tr| tr.0.short == backend_arg.short);
+        Ok(tool_request.and_then(|tr| tr.1.first().map(|req| req.options())))
+    }
+
     pub fn get_repo_url(&self, plugin_name: &str) -> Option<String> {
         let plugin_name = self
             .all_aliases