Struct HttpBackend 

pub struct HttpBackend { /* private fields */ }

Implementations

impl HttpBackend

pub fn from_id(id: &str) -> Option<Self>

pub fn install_locator_for( dirs: &Dirs, platform: Platform, backend_id: &str, tv: &ToolVersion, ) -> Result<InstallLocator>

Derive an exact fingerprinted locator from public and lock-replay options without performing DNS or I/O.

pub fn install_candidate_is_valid( dirs: &Dirs, install_root: &Path, identity: &InstallIdentity, ) -> Result<bool>

Validate an inventory candidate without network access. Lifecycle and lockfile callers use this narrow HTTP-specific boundary.

Trait Implementations

impl Backend for HttpBackend

fn id(&self) -> &str

Canonical id, e.g. “node”, “go”, “python”.

fn default_sources(&self) -> Vec<Source>

The default source list for this backend (official + mirrors).

fn probe_url(&self, _ctx: &Ctx, _source: &Source) -> Option<String>

A representative small URL used to speed-probe a source. Given a source’s download base, return a URL to fetch for measuring throughput.

fn list_remote_versions<'life0, 'life1, 'async_trait>( &'life0 self, _ctx: &'life1 Ctx, ) -> Pin<Box<dyn Future<Output = Result<Vec<VersionInfo>>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

List installable versions (typically parsed from a remote index).

fn resolve_version<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, _ctx: &'life1 Ctx, req: &'life2 ToolRequest, ) -> Pin<Box<dyn Future<Output = Result<ToolVersion>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Resolve a request (e.g. 20, lts) to a concrete version.

fn install<'life0, 'life1, 'life2, 'life3, 'async_trait>( &'life0 self, ictx: &'life1 InstallCtx<'life2>, tv: &'life3 ToolVersion, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait,

Install a concrete version.

fn uninstall<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, ctx: &'life1 Ctx, tv: &'life2 ToolVersion, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Remove an installed version. Default removes the install dir.

fn list_installed(&self, ctx: &Ctx) -> Result<Vec<String>>

List locally installed versions (dirs with a complete marker).

fn ensure_post_install(&self, ctx: &Ctx, tv: &ToolVersion) -> Result<()>

Apply idempotent post-install actions to an already installed version.

fn bin_paths(&self, ctx: &Ctx, tv: &ToolVersion) -> Result<Vec<PathBuf>>

Directories to add to PATH for an installed version (its bin/ dirs).

fn bin_names(&self, ctx: &Ctx, tv: &ToolVersion) -> Result<Vec<String>>

Executable names this version exposes (used to generate shims).

fn dynamic_install_identity( &self, ctx: &Ctx, tv: &ToolVersion, ) -> Result<Option<InstallIdentity>>

Exact identity selected for a dynamic install. None retains inventory discovery for backends whose artifact identity is learned at install.

fn validate_dynamic_install( &self, ctx: &Ctx, _tv: &ToolVersion, install_root: &Path, identity: &InstallIdentity, ) -> Result<bool>

Validate provider-specific evidence after shared inventory validation.

fn aliases(&self) -> &[&str]

Alternate names accepted on the CLI (e.g. “nodejs” -> “node”).

fn exec_env( &self, _ctx: &Ctx, _tv: &ToolVersion, ) -> Result<BTreeMap<String, String>>

Environment variables to export when this version is active (e.g. GOROOT, JAVA_HOME).

fn idiomatic_files(&self) -> &[&str]

Idiomatic version files this backend understands (e.g. .nvmrc).

impl Debug for HttpBackend

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.