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`cmd/simplexcalc/` now holds only `main.go`, whose body is one call, `os.Exit(cli.Main(version))`, as the Go style guide requires. The command tree and the `run` and `version` commands moved unchanged into `internal/cli`, with tests for `version` and for an unknown command. Output streams, exit statuses and the `-X main.version` build flag are as before. Disclosure: the comment in `execute` saying cobra has already printed the error is false, since the root command silences cobra's errors; it moved unchanged and is left for a follow-up. Model: opus-5-5
38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
// Package cli is the simplexcalc command tree: the run and version
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// commands, and the exit status the program ends with.
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package cli
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import (
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"fmt"
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"github.com/spf13/cobra"
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)
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// appname is the name the program reports in its logs and its version.
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const appname = "simplexcalc"
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// Main runs the command named on the command line and returns the exit
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// status for main to pass to os.Exit.
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//
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// It leaves cobra's output streams at their defaults. cobra writes the
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// usage and an unknown help topic to stderr, but SetOut moves them onto
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// the stream it is given.
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func Main(version string) int {
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return execute(rootCmd(version))
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}
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// execute runs root and returns the exit status. It takes the command
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// so that a test can set its arguments and output streams first.
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func execute(root *cobra.Command) int {
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err := root.Execute()
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if err != nil {
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// cobra has already printed the error; this only sets the exit
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// status, which is what a supervisor and a shell script read.
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_, _ = fmt.Fprintln(root.ErrOrStderr(), "exiting: "+err.Error())
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return 1
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}
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return 0
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}
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