Adds a new starlark builtin 'help' that prints the list of available
builtins when called without arguments and help for the specified
builtin when passed an argument.
The help is autogenerated from godoc comments so it isn't always
exactly accurate for starlark (in particular we sometimes refer to the
In structs), but it's better than nothing.
This patch makes the time library available to Starlark scripts. This
library is one of the very few few that are built into starlark-go (the
others are json, math, proto).
I've played around with Starlark scripting today, and immediately I
wanted to measure how long certain computations take.
Adds a transcript command that appends all command output to a file.
This command is equivalent to gdb's 'set logging'.
As part of this refactor the pkg/terminal commands to always write to a
io.Writer instead of using os.Stdout directly (through
fmt.Printf/fmt.Println).
Fixes#2237
If the argument of 'source' ends in '.star' it will be interpreted as a
starlark script.
If the argument of 'source' is '-' an interactive starlark repl will be
started.
For documentation on how the starlark execution environment works see
Documentation/cli/starlark.md.
The starlark API is autogenerated from the JSON-RPC API by
script/gen-starlark-bindings.go.
In general for each JSON-RPC API a single global starlark function is
created.
When one of those functions is called (through a starlark script) the
arguments are converted to go structs using reflection. See
unmarshalStarlarkValue in pkg/terminal/starbind/conv.go.
If there are no type conversion errors the JSON-RPC call is executed.
The return value of the JSON-RPC call is converted back into a starlark
value by interfaceToStarlarkValue (same file):
* primitive types (such as integers, floats or strings) are converted
by creating the corresponding starlark value.
* compound types (such as structs and slices) are converted by wrapping
their reflect.Value object into a type that implements the relevant
starlark interfaces.
* api.Variables are treated specially so that their Value field can be
of the proper type instead of always being a string.
Implements #1415, #1443
