value

Documentation

Overview

Helper functions for doing value conversions.

Index

• func AsString(x starlark.Value) (string, bool)
• func AsStringOrStringList(x starlark.Value) ([]string, bool)
• func SequenceToStringSlice(seq starlark.Sequence) ([]string, error)
• func StringSliceToList(slice []string) *starlark.List
• func ValueGroupToCmdHelper(cmdVal, cmdBatVal starlark.Value) (model.Cmd, error)
• func ValueOrSequenceToSlice(v starlark.Value) []starlark.Value
• func ValueToAbsPath(thread *starlark.Thread, v starlark.Value) (string, error)
• func ValueToBatCmd(v starlark.Value) (model.Cmd, error)
• func ValueToHostCmd(v starlark.Value) (model.Cmd, error)
• func ValueToStringMap(v starlark.Value) (map[string]string, error)
• func ValueToUnixCmd(v starlark.Value) (model.Cmd, error)
• type ImplicitStringer
• type PathMaker

Functions

func AsString

func AsString(x starlark.Value) (string, bool)

Wrapper around starlark.AsString

func AsStringOrStringList

func AsStringOrStringList(x starlark.Value) ([]string, bool)

Unpack an argument that can either be expressed as a string or as a list of strings.

func SequenceToStringSlice

func SequenceToStringSlice(seq starlark.Sequence) ([]string, error)

func StringSliceToList

func StringSliceToList(slice []string) *starlark.List

func ValueGroupToCmdHelper

func ValueGroupToCmdHelper(cmdVal, cmdBatVal starlark.Value) (model.Cmd, error)

In other similar build systems (Buck and Bazel), there's a "main" command, and then various per-platform overrides. https://docs.bazel.build/versions/master/be/general.html#genrule.cmd_bat This helper function abstracts out the precedence rules.

func ValueOrSequenceToSlice

func ValueOrSequenceToSlice(v starlark.Value) []starlark.Value

If `v` is a `starlark.Sequence`, return a slice of its elements Otherwise, return it as a single-element slice For functions that take `Union[List[T], T]`

func ValueToAbsPath

func ValueToAbsPath(thread *starlark.Thread, v starlark.Value) (string, error)

func ValueToBatCmd

func ValueToBatCmd(v starlark.Value) (model.Cmd, error)

func ValueToHostCmd

func ValueToHostCmd(v starlark.Value) (model.Cmd, error)

provides dockerfile-style behavior of: a string gets interpreted as a shell command (like, sh -c 'foo bar $X') an array of strings gets interpreted as a raw argv to exec

func ValueToStringMap

func ValueToStringMap(v starlark.Value) (map[string]string, error)

func ValueToUnixCmd

func ValueToUnixCmd(v starlark.Value) (model.Cmd, error)

Types

type ImplicitStringer

type ImplicitStringer interface {
	ImplicitString() string
}

type PathMaker

type PathMaker interface {
	MakeLocalPath(relPath string) string
}