48 lines
1.0 KiB
Go
48 lines
1.0 KiB
Go
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package main
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import (
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"flag"
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"fmt"
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"os"
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"git.netflux.io/rob/envfilesubst/scanner"
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)
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const version = "0.1"
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func main() {
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var (
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path string
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printVersion bool
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)
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flag.StringVar(&path, "f", "", "The envfile to read from")
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flag.BoolVar(&printVersion, "version", false, "Print version and exit")
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flag.Parse()
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if printVersion {
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fmt.Fprintf(os.Stderr, "envfilesubst version %s\n", version)
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os.Exit(0)
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}
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if path == "" {
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fmt.Fprint(os.Stderr, "envfilesubst reads an input from stdin and pipes it to stdout, replacing $ENV_VAR or ${ENV_VAR} occurrences that can be found in the provided envfile.\n\n")
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fmt.Fprint(os.Stderr, "Variables that cannot be found in envfile are left unchanged.\n\n")
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fmt.Fprint(os.Stderr, "Usage:\n")
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flag.PrintDefaults()
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os.Exit(1)
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}
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envfile, err := os.Open(path)
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if err != nil {
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fmt.Fprintf(os.Stderr, "Error: %v", err)
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os.Exit(1)
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}
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scanner := scanner.New(os.Stdout, os.Stdin, envfile)
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if err := scanner.Scan(); err != nil {
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fmt.Fprintf(os.Stderr, "Error: %v", err)
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os.Exit(1)
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}
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}
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