actionlint-interpreter

Simple expression interpreter for GitHub Actions Expressions operating on the AST produced by https://github.com/rhysd/actionlint.

Usage

expression := "input.foo <= input.bar"

// Lex & Parse
lexer := actionlint.NewExprLexer(expression + "}}")
parser := actionlint.NewExprParser()
n, perr := parser.Parse(lexer)
if perr != nil {
  panic(perr)
}

// Evaluate expressions
result, err := Evaluate(n, ContextData{
  "input": ContextData{
    "foo": float64(1),
    "bar": float64(2),
  },
})
if err != nil {
  panic(err)
}

fmt.Println(result.Value)
// Output: true

TODO

Not everything is implemented yet:

Context access

• Finish object & array access
• Wildcard access (inputs.*.foo)

Functions

• contains
• startsWith
• endsWith
• format
• join
• toJSON
• fromJSON
• hashFiles

Status check functions:

• success
• always
• cancelled
• failure