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cmd: Allow caddy fmt to read from stdin (#3680)

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* Allow 'caddy fmt' to read from stdin

* fmt: use '-' as the file name for reading from stdin

* Minor adjustments

Co-authored-by: Matthew Holt <mholt@users.noreply.github.com>
This commit is contained in:
Matthew Penner 2020-09-14 12:30:12 -06:00 committed by GitHub
parent 4217217bad
commit b88e2b6a49
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 19 additions and 6 deletions
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17
cmd/commandfuncs.go
View file

@ -533,7 +533,17 @@ func cmdFmt(fl Flags) (int, error) {
if formatCmdConfigFile == "" {
formatCmdConfigFile = "Caddyfile"
}
overwrite := fl.Bool("overwrite")
// as a special case, read from stdin if the file name is "-"
if formatCmdConfigFile == "-" {
input, err := ioutil.ReadAll(os.Stdin)
if err != nil {
return caddy.ExitCodeFailedStartup,
fmt.Errorf("reading stdin: %v", err)
}
fmt.Print(string(caddyfile.Format(input)))
return caddy.ExitCodeSuccess, nil
}
input, err := ioutil.ReadFile(formatCmdConfigFile)
if err != nil {
@ -543,9 +553,8 @@ func cmdFmt(fl Flags) (int, error) {
output := caddyfile.Format(input)
if overwrite {
err = ioutil.WriteFile(formatCmdConfigFile, output, 0644)
if err != nil {
if fl.Bool("overwrite") {
if err := ioutil.WriteFile(formatCmdConfigFile, output, 0600); err != nil {
return caddy.ExitCodeFailedStartup, nil
}
} else {

8
cmd/commands.go
View file

@ -263,8 +263,12 @@ provisioning stages.`,
Formats the Caddyfile by adding proper indentation and spaces to improve
human readability. It prints the result to stdout.
If --write is specified, the output will be written to the config file
directly instead of printing it.`,
If --overwrite is specified, the output will be written to the config file
directly instead of printing it.
If you wish you use stdin instead of a regular file, use - as the path.
When reading from stdin, the --overwrite flag has no effect: the result
is always printed to stdout.`,
Flags: func() *flag.FlagSet {
fs := flag.NewFlagSet("format", flag.ExitOnError)
fs.Bool("overwrite", false, "Overwrite the input file with the results")