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main.go
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main.go
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package main
import (
"bufio"
"log"
"os"
"mvdan.cc/sh/v3/syntax"
)
func main() {
input := os.Stdin
if len(os.Args) > 1 {
f, err := os.Open(os.Args[1])
if err != nil {
log.Fatal(err)
}
defer f.Close()
input = f
}
parser := syntax.NewParser()
file, err := parser.Parse(input, "")
if err != nil {
log.Fatal(err)
}
printer := syntax.NewPrinter()
output := bufio.NewWriter(os.Stdout)
syntax.Walk(file, func(node syntax.Node) bool {
if decl, ok := node.(*syntax.DeclClause); ok && decl.Variant.Value == "export" {
if len(decl.Args) != 1 {
log.Fatalf("expected export to have 1 argument, got %d", len(decl.Args))
}
for _, assign := range decl.Args {
output.WriteString(assign.Name.Value)
output.WriteByte('=')
printer.Print(output, decl.Args[0].Value)
output.WriteByte('\n')
}
}
return true
})
if err := output.Flush(); err != nil {
log.Fatal(err)
}
}