Release WASI 0.2.1 (#612)

* rename `preview2/` to `wasip2/`

* Update to v0.2.1

wasip2/cli/command.wit

@@ -0,0 +1,10 @@
+package wasi:cli@0.2.1;
+
+@since(version = 0.2.0)
+world command {
+  @since(version = 0.2.0)
+  include imports;
+
+  @since(version = 0.2.0)
+  export run;
+}

preview2/cli/environment.wit → wasip2/cli/environment.wit

@@ -1,3 +1,4 @@
+@since(version = 0.2.0)
 interface environment {
   /// Get the POSIX-style environment variables.
   ///
@@ -7,12 +8,15 @@ interface environment {
   /// Morally, these are a value import, but until value imports are available
   /// in the component model, this import function should return the same
   /// values each time it is called.
+  @since(version = 0.2.0)
   get-environment: func() -> list<tuple<string, string>>;
 
   /// Get the POSIX-style arguments to the program.
+  @since(version = 0.2.0)
   get-arguments: func() -> list<string>;
 
   /// Return a path that programs should use as their initial current working
   /// directory, interpreting `.` as shorthand for this.
+  @since(version = 0.2.0)
   initial-cwd: func() -> option<string>;
 }

wasip2/cli/exit.wit

@@ -0,0 +1,17 @@
+@since(version = 0.2.0)
+interface exit {
+  /// Exit the current instance and any linked instances.
+  @since(version = 0.2.0)
+  exit: func(status: result);
+
+  /// Exit the current instance and any linked instances, reporting the
+  /// specified status code to the host.
+  ///
+  /// The meaning of the code depends on the context, with 0 usually meaning
+  /// "success", and other values indicating various types of failure.
+  ///
+  /// This function does not return; the effect is analogous to a trap, but
+  /// without the connotation that something bad has happened.
+  @unstable(feature = cli-exit-with-code)
+  exit-with-code: func(status-code: u8);
+}

wasip2/cli/imports.wit

@@ -0,0 +1,36 @@
+package wasi:cli@0.2.1;
+
+@since(version = 0.2.0)
+world imports {
+  @since(version = 0.2.0)
+  include wasi:clocks/imports@0.2.1;
+  @since(version = 0.2.0)
+  include wasi:filesystem/imports@0.2.1;
+  @since(version = 0.2.0)
+  include wasi:sockets/imports@0.2.1;
+  @since(version = 0.2.0)
+  include wasi:random/imports@0.2.1;
+  @since(version = 0.2.0)
+  include wasi:io/imports@0.2.1;
+
+  @since(version = 0.2.0)
+  import environment;
+  @since(version = 0.2.0)
+  import exit;
+  @since(version = 0.2.0)
+  import stdin;
+  @since(version = 0.2.0)
+  import stdout;
+  @since(version = 0.2.0)
+  import stderr;
+  @since(version = 0.2.0)
+  import terminal-input;
+  @since(version = 0.2.0)
+  import terminal-output;
+  @since(version = 0.2.0)
+  import terminal-stdin;
+  @since(version = 0.2.0)
+  import terminal-stdout;
+  @since(version = 0.2.0)
+  import terminal-stderr;
+}

preview2/cli/run.wit → wasip2/cli/run.wit

@@ -1,4 +1,6 @@
+@since(version = 0.2.0)
 interface run {
   /// Run the program.
+  @since(version = 0.2.0)
   run: func() -> result;
 }

wasip2/cli/stdio.wit

@@ -0,0 +1,26 @@
+@since(version = 0.2.0)
+interface stdin {
+  @since(version = 0.2.0)
+  use wasi:io/streams@0.2.1.{input-stream};
+
+  @since(version = 0.2.0)
+  get-stdin: func() -> input-stream;
+}
+
+@since(version = 0.2.0)
+interface stdout {
+  @since(version = 0.2.0)
+  use wasi:io/streams@0.2.1.{output-stream};
+
+  @since(version = 0.2.0)
+  get-stdout: func() -> output-stream;
+}
+
+@since(version = 0.2.0)
+interface stderr {
+  @since(version = 0.2.0)
+  use wasi:io/streams@0.2.1.{output-stream};
+
+  @since(version = 0.2.0)
+  get-stderr: func() -> output-stream;
+}

preview2/cli/terminal.wit → wasip2/cli/terminal.wit

@@ -3,8 +3,10 @@
 /// In the future, this may include functions for disabling echoing,
 /// disabling input buffering so that keyboard events are sent through
 /// immediately, querying supported features, and so on.
+@since(version = 0.2.0)
 interface terminal-input {
     /// The input side of a terminal.
+    @since(version = 0.2.0)
     resource terminal-input;
 }
 
@@ -13,37 +15,48 @@ interface terminal-input {
 /// In the future, this may include functions for querying the terminal
 /// size, being notified of terminal size changes, querying supported
 /// features, and so on.
+@since(version = 0.2.0)
 interface terminal-output {
     /// The output side of a terminal.
+    @since(version = 0.2.0)
     resource terminal-output;
 }
 
 /// An interface providing an optional `terminal-input` for stdin as a
 /// link-time authority.
+@since(version = 0.2.0)
 interface terminal-stdin {
+    @since(version = 0.2.0)
     use terminal-input.{terminal-input};
 
     /// If stdin is connected to a terminal, return a `terminal-input` handle
     /// allowing further interaction with it.
+    @since(version = 0.2.0)
     get-terminal-stdin: func() -> option<terminal-input>;
 }
 
 /// An interface providing an optional `terminal-output` for stdout as a
 /// link-time authority.
+@since(version = 0.2.0)
 interface terminal-stdout {
+    @since(version = 0.2.0)
     use terminal-output.{terminal-output};
 
     /// If stdout is connected to a terminal, return a `terminal-output` handle
     /// allowing further interaction with it.
+    @since(version = 0.2.0)
     get-terminal-stdout: func() -> option<terminal-output>;
 }
 
 /// An interface providing an optional `terminal-output` for stderr as a
 /// link-time authority.
+@since(version = 0.2.0)
 interface terminal-stderr {
+    @since(version = 0.2.0)
     use terminal-output.{terminal-output};
 
     /// If stderr is connected to a terminal, return a `terminal-output` handle
     /// allowing further interaction with it.
+    @since(version = 0.2.0)
     get-terminal-stderr: func() -> option<terminal-output>;
 }

preview2/clocks/monotonic-clock.wit → wasip2/clocks/monotonic-clock.wit

@@ -7,38 +7,43 @@ package wasi:clocks@0.2.0;
 ///
 /// A monotonic clock is a clock which has an unspecified initial value, and
 /// successive reads of the clock will produce non-decreasing values.
-///
-/// It is intended for measuring elapsed time.
+@since(version = 0.2.0)
 interface monotonic-clock {
+    @since(version = 0.2.0)
     use wasi:io/poll@0.2.0.{pollable};
 
     /// An instant in time, in nanoseconds. An instant is relative to an
     /// unspecified initial value, and can only be compared to instances from
     /// the same monotonic-clock.
+    @since(version = 0.2.0)
     type instant = u64;
 
     /// A duration of time, in nanoseconds.
+    @since(version = 0.2.0)
     type duration = u64;
 
     /// Read the current value of the clock.
     ///
     /// The clock is monotonic, therefore calling this function repeatedly will
     /// produce a sequence of non-decreasing values.
+    @since(version = 0.2.0)
     now: func() -> instant;
 
     /// Query the resolution of the clock. Returns the duration of time
     /// corresponding to a clock tick.
+    @since(version = 0.2.0)
     resolution: func() -> duration;
 
     /// Create a `pollable` which will resolve once the specified instant
-    /// occured.
+    /// has occured.
+    @since(version = 0.2.0)
     subscribe-instant: func(
         when: instant,
     ) -> pollable;
 
-    /// Create a `pollable` which will resolve once the given duration has
-    /// elapsed, starting at the time at which this function was called.
-    /// occured.
+    /// Create a `pollable` that will resolve after the specified duration has
+    /// elapsed from the time this function is invoked.
+    @since(version = 0.2.0)
     subscribe-duration: func(
         when: duration,
     ) -> pollable;

wasip2/clocks/timezone.wit

@@ -0,0 +1,55 @@
+package wasi:clocks@0.2.0;
+
+@unstable(feature = clocks-timezone)
+interface timezone {
+    @unstable(feature = clocks-timezone)
+    use wall-clock.{datetime};
+
+    /// Return information needed to display the given `datetime`. This includes
+    /// the UTC offset, the time zone name, and a flag indicating whether
+    /// daylight saving time is active.
+    ///
+    /// If the timezone cannot be determined for the given `datetime`, return a
+    /// `timezone-display` for `UTC` with a `utc-offset` of 0 and no daylight
+    /// saving time.
+    @unstable(feature = clocks-timezone)
+    display: func(when: datetime) -> timezone-display;
+
+    /// The same as `display`, but only return the UTC offset.
+    @unstable(feature = clocks-timezone)
+    utc-offset: func(when: datetime) -> s32;
+
+    /// Information useful for displaying the timezone of a specific `datetime`.
+    ///
+    /// This information may vary within a single `timezone` to reflect daylight
+    /// saving time adjustments.
+    @unstable(feature = clocks-timezone)
+    record timezone-display {
+        /// The number of seconds difference between UTC time and the local
+        /// time of the timezone.
+        ///
+        /// The returned value will always be less than 86400 which is the
+        /// number of seconds in a day (24*60*60).
+        ///
+        /// In implementations that do not expose an actual time zone, this
+        /// should return 0.
+        utc-offset: s32,
+
+        /// The abbreviated name of the timezone to display to a user. The name
+        /// `UTC` indicates Coordinated Universal Time. Otherwise, this should
+        /// reference local standards for the name of the time zone.
+        ///
+        /// In implementations that do not expose an actual time zone, this
+        /// should be the string `UTC`.
+        ///
+        /// In time zones that do not have an applicable name, a formatted
+        /// representation of the UTC offset may be returned, such as `-04:00`.
+        name: string,
+
+        /// Whether daylight saving time is active.
+        ///
+        /// In implementations that do not expose an actual time zone, this
+        /// should return false.
+        in-daylight-saving-time: bool,
+    }
+}

preview2/clocks/wall-clock.wit → wasip2/clocks/wall-clock.wit

@@ -13,8 +13,10 @@ package wasi:clocks@0.2.0;
 /// monotonic, making it unsuitable for measuring elapsed time.
 ///
 /// It is intended for reporting the current date and time for humans.
+@since(version = 0.2.0)
 interface wall-clock {
     /// A time and date in seconds plus nanoseconds.
+    @since(version = 0.2.0)
     record datetime {
         seconds: u64,
         nanoseconds: u32,
@@ -33,10 +35,12 @@ interface wall-clock {
     ///
     /// [POSIX's Seconds Since the Epoch]: https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_xbd_chap04.html#tag_21_04_16
     /// [Unix Time]: https://en.wikipedia.org/wiki/Unix_time
+    @since(version = 0.2.0)
     now: func() -> datetime;
 
     /// Query the resolution of the clock.
     ///
     /// The nanoseconds field of the output is always less than 1000000000.
+    @since(version = 0.2.0)
     resolution: func() -> datetime;
 }