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38 lines
651 B
Go
38 lines
651 B
Go
package reducer
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import (
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_ "embed"
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"fmt"
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"os/exec"
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)
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func CreateRuby(args []string) *exec.Cmd {
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cmd := exec.Command("ruby", "-e", ruby(args))
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return cmd
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}
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//go:embed ruby.rb
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var templateRuby string
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func ruby(args []string) string {
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rs := "\n"
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for i, a := range args {
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rs += fmt.Sprintf(
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`begin
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x = lambda {|x| %v }.call(x)
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`, a)
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// Generate a beautiful error message.
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rs += "rescue Exception => e\n"
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pre, post, pointer := trace(args, i)
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rs += fmt.Sprintf(
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` STDERR.puts "\n #{%q} #{%q} #{%q}\n %v\n\n#{e}\n"
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exit(1)
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`,
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pre, a, post,
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pointer,
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)
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rs += "end\n"
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}
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return fmt.Sprintf(templateRuby, rs)
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}
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