Struct wasmer_wasix::WasiEnvBuilder

pub struct WasiEnvBuilder { /* private fields */ }

Builder API for configuring a WasiEnv environment needed to run WASI modules.

Usage:

let mut state_builder = WasiEnv::builder("wasi-prog-name");
state_builder
   .env("ENV_VAR", "ENV_VAL")
   .arg("--verbose")
   .preopen_dir("src")?
   .map_dir("name_wasi_sees", "path/on/host/fs")?
   .build_init()?;

Implementations

impl WasiEnvBuilder

pub fn new(program_name: impl Into<String>) -> Self

Creates an empty WasiEnvBuilder.

pub fn env<Key, Value>(self, key: Key, value: Value) -> Selfwhere Key: AsRef<[u8]>, Value: AsRef<[u8]>,

Add an environment variable pair.

Both the key and value of an environment variable must not contain a nul byte (0x0), and the key must not contain the = byte (0x3d).

pub fn add_env<Key, Value>(&mut self, key: Key, value: Value)where Key: AsRef<[u8]>, Value: AsRef<[u8]>,

Add an environment variable pair.

Both the key and value of an environment variable must not contain a nul byte (0x0), and the key must not contain the = byte (0x3d).

pub fn envs<I, Key, Value>(self, env_pairs: I) -> Selfwhere I: IntoIterator<Item = (Key, Value)>, Key: AsRef<[u8]>, Value: AsRef<[u8]>,

Add multiple environment variable pairs.

Both the key and value of the environment variables must not contain a nul byte (0x0), and the key must not contain the = byte (0x3d).

pub fn add_envs<I, Key, Value>(&mut self, env_pairs: I)where I: IntoIterator<Item = (Key, Value)>, Key: AsRef<[u8]>, Value: AsRef<[u8]>,

Add multiple environment variable pairs.

Both the key and value of the environment variables must not contain a nul byte (0x0), and the key must not contain the = byte (0x3d).

pub fn get_env(&self) -> &[(String, Vec<u8>)]

Get a reference to the configured environment variables.

pub fn get_env_mut(&mut self) -> &mut Vec<(String, Vec<u8>)>

Get a mutable reference to the configured environment variables.

pub fn arg<V>(self, arg: V) -> Selfwhere V: AsRef<[u8]>,

Add an argument.

Arguments must not contain the nul (0x0) byte

pub fn add_arg<V>(&mut self, arg: V)where V: AsRef<[u8]>,

Add an argument.

Arguments must not contain the nul (0x0) byte.

pub fn args<I, Arg>(self, args: I) -> Selfwhere I: IntoIterator<Item = Arg>, Arg: AsRef<[u8]>,

Add multiple arguments.

Arguments must not contain the nul (0x0) byte

pub fn add_args<I, Arg>(&mut self, args: I)where I: IntoIterator<Item = Arg>, Arg: AsRef<[u8]>,

Add multiple arguments.

Arguments must not contain the nul (0x0) byte

pub fn get_args(&self) -> &[String]

Get a reference to the configured arguments.

pub fn get_args_mut(&mut self) -> &mut Vec<String>

Get a mutable reference to the configured arguments.

pub fn use_webc(self, pkg: BinaryPackage) -> Self

Adds a container this module inherits from.

This will make all of the container’s files and commands available to the resulting WASI instance.

pub fn add_webc(&mut self, pkg: BinaryPackage) -> &mut Self

Adds a container this module inherits from.

This will make all of the container’s files and commands available to the resulting WASI instance.

pub fn uses<I>(self, uses: I) -> Selfwhere I: IntoIterator<Item = BinaryPackage>,

Adds a list of other containers this module inherits from.

This will make all of the container’s files and commands available to the resulting WASI instance.

pub fn map_command<Name, Target>(self, name: Name, target: Target) -> Selfwhere Name: AsRef<str>, Target: AsRef<str>,

Map an atom to a local binary

pub fn map_commands<I, Name, Target>(self, map_commands: I) -> Selfwhere I: IntoIterator<Item = (Name, Target)>, Name: AsRef<str>, Target: AsRef<str>,

Maps a series of atoms to the local binaries

pub fn preopen_dir<P>(self, po_dir: P) -> Result<Self, WasiStateCreationError>where P: AsRef<Path>,

Preopen a directory

This opens the given directory at the virtual root, /, and allows the WASI module to read and write to the given directory.

pub fn add_preopen_dir<P>( &mut self, po_dir: P ) -> Result<(), WasiStateCreationError>where P: AsRef<Path>,

Adds a preopen a directory

This opens the given directory at the virtual root, /, and allows the WASI module to read and write to the given directory.

pub fn preopen_dirs<I, P>(self, dirs: I) -> Result<Self, WasiStateCreationError>where I: IntoIterator<Item = P>, P: AsRef<Path>,

Preopen multiple directories.

This opens the given directories at the virtual root, /, and allows the WASI module to read and write to the given directory.

pub fn preopen_build<F>(self, inner: F) -> Result<Self, WasiStateCreationError>where F: Fn(&mut PreopenDirBuilder) -> &mut PreopenDirBuilder,

Preopen a directory and configure it.

Usage:

WasiEnv::builder("program_name")
   .preopen_build(|p| p.directory("src").read(true).write(true).create(true))?
   .preopen_build(|p| p.directory(".").alias("dot").read(true))?
   .build_init()?;

pub fn add_preopen_build<F>( &mut self, inner: F ) -> Result<(), WasiStateCreationError>where F: Fn(&mut PreopenDirBuilder) -> &mut PreopenDirBuilder,

Preopen a directory and configure it.

Usage:

WasiEnv::builder("program_name")
   .preopen_build(|p| p.directory("src").read(true).write(true).create(true))?
   .preopen_build(|p| p.directory(".").alias("dot").read(true))?
   .build_init()?;

pub fn preopen_vfs_dirs<I>( &mut self, po_dirs: I ) -> Result<&mut Self, WasiStateCreationError>where I: IntoIterator<Item = String>,

Preopen the given directories from the Virtual FS.

pub fn map_dir<P>( self, alias: &str, po_dir: P ) -> Result<Self, WasiStateCreationError>where P: AsRef<Path>,

Preopen a directory with a different name exposed to the WASI.

pub fn add_map_dir<P>( &mut self, alias: &str, po_dir: P ) -> Result<(), WasiStateCreationError>where P: AsRef<Path>,

Preopen a directory with a different name exposed to the WASI.

pub fn map_dirs<I, P>( self, mapped_dirs: I ) -> Result<Self, WasiStateCreationError>where I: IntoIterator<Item = (String, P)>, P: AsRef<Path>,

Preopen directorys with a different names exposed to the WASI.

pub fn stdout( self, new_file: Box<dyn VirtualFile + Send + Sync + 'static> ) -> Self

Overwrite the default WASI stdout, if you want to hold on to the original stdout use WasiFs::swap_file after building.

pub fn set_stdout( &mut self, new_file: Box<dyn VirtualFile + Send + Sync + 'static> )

Overwrite the default WASI stdout, if you want to hold on to the original stdout use WasiFs::swap_file after building.

pub fn stderr( self, new_file: Box<dyn VirtualFile + Send + Sync + 'static> ) -> Self

Overwrite the default WASI stderr, if you want to hold on to the original stderr use WasiFs::swap_file after building.

pub fn set_stderr( &mut self, new_file: Box<dyn VirtualFile + Send + Sync + 'static> )

Overwrite the default WASI stderr, if you want to hold on to the original stderr use WasiFs::swap_file after building.

pub fn stdin( self, new_file: Box<dyn VirtualFile + Send + Sync + 'static> ) -> Self

Overwrite the default WASI stdin, if you want to hold on to the original stdin use WasiFs::swap_file after building.

pub fn set_stdin( &mut self, new_file: Box<dyn VirtualFile + Send + Sync + 'static> )

Overwrite the default WASI stdin, if you want to hold on to the original stdin use WasiFs::swap_file after building.

pub fn fs(self, fs: Box<dyn FileSystem + Send + Sync>) -> Self

Sets the FileSystem to be used with this WASI instance.

This is usually used in case a custom virtual_fs::FileSystem is needed.

pub fn set_fs(&mut self, fs: Box<dyn FileSystem + Send + Sync>)

pub fn sandbox_fs(self, fs: TmpFileSystem) -> Self

Sets a new sandbox FileSystem to be used with this WASI instance.

This is usually used in case a custom virtual_fs::FileSystem is needed.

pub fn setup_fs( self, setup_fs_fn: Box<dyn Fn(&WasiInodes, &mut WasiFs) -> Result<(), String> + Send> ) -> Self

Configure the WASI filesystem before running.

pub fn runtime(self, runtime: Arc<dyn Runtime + Send + Sync>) -> Self

Sets the WASI runtime implementation and overrides the default implementation

pub fn set_runtime(&mut self, runtime: Arc<dyn Runtime + Send + Sync>)

pub fn capabilities(self, capabilities: Capabilities) -> Self

pub fn capabilities_mut(&mut self) -> &mut Capabilities

pub fn set_capabilities(&mut self, capabilities: Capabilities)

pub fn build_init(self) -> Result<WasiEnvInit, WasiStateCreationError>

Consumes the WasiEnvBuilder and produces a WasiEnvInit, which can be used to construct a new WasiEnv.

Returns the error from WasiFs::new if there’s an error

NOTE: You should prefer to not work directly with WasiEnvInit. Use WasiEnvBuilder::run or WasiEnvBuilder::run_with_store instead to ensure proper invokation of WASI modules.

pub fn build(self) -> Result<WasiEnv, WasiRuntimeError>

pub fn instantiate( self, module: Module, store: &mut impl AsStoreMut ) -> Result<(Instance, WasiFunctionEnv), WasiRuntimeError>

Consumes the WasiEnvBuilder and produces a WasiEnvInit, which can be used to construct a new WasiEnv.

Returns the error from WasiFs::new if there’s an error

pub fn run(self, module: Module) -> Result<(), WasiRuntimeError>

pub fn run_with_store( self, module: Module, store: &mut Store ) -> Result<(), WasiRuntimeError>

pub fn run_with_store_async( self, module: Module, store: Store ) -> Result<(), WasiRuntimeError>

Start the WASI executable with async threads enabled.

Trait Implementations

impl Debug for WasiEnvBuilder

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

Formats the value using the given formatter.

impl Default for WasiEnvBuilder

fn default() -> WasiEnvBuilder

Returns the “default value” for a type.