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Fix stderr printing functions #894

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merged 6 commits into from Oct 1, 2020
Merged

Fix stderr printing functions #894

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59bb8be
Fix stderr printing functions
alessio Jun 24, 2019
0da6ddb
Errors go to stderr as per POSIX
alessio Jun 26, 2019
d7b65d7
use PrintErrf() instead of extra call to Sprintf()
alessio Apr 12, 2020
bf23a83
Error messages should always be printed to os.Stderr.
alessio Apr 12, 2020
4950fa3
Merge remote-tracking branch 'upstream/master' into fix-stderr-redire…
Aug 17, 2020
b23cee0
add test case for Print* redirection
Sep 8, 2020
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14 changes: 7 additions & 7 deletions command.go
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Expand Up @@ -348,7 +348,7 @@ func (c *Command) UsageFunc() (f func(*Command) error) {
c.mergePersistentFlags()
err := tmpl(c.OutOrStderr(), c.UsageTemplate(), c)
if err != nil {
c.Println(err)
c.PrintErrln(err)
}
return err
}
Expand All @@ -374,7 +374,7 @@ func (c *Command) HelpFunc() func(*Command, []string) {
c.mergePersistentFlags()
err := tmpl(c.OutOrStderr(), c.HelpTemplate(), c)
if err != nil {
c.Println(err)
c.PrintErrln(err)
}
}
}
Expand Down Expand Up @@ -903,8 +903,8 @@ func (c *Command) ExecuteC() (cmd *Command, err error) {
c = cmd
}
if !c.SilenceErrors {
c.Println("Error:", err.Error())
c.Printf("Run '%v --help' for usage.\n", c.CommandPath())
c.PrintErrln("Error:", err.Error())
c.PrintErr(fmt.Sprintf("Run '%v --help' for usage.\n", c.CommandPath()))
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}
return c, err
}
Expand Down Expand Up @@ -934,7 +934,7 @@ func (c *Command) ExecuteC() (cmd *Command, err error) {
// If root command has SilentErrors flagged,
// all subcommands should respect it
if !cmd.SilenceErrors && !c.SilenceErrors {
c.Println("Error:", err.Error())
c.PrintErrln("Error:", err.Error())
}

// If root command has SilentUsage flagged,
Expand Down Expand Up @@ -1150,12 +1150,12 @@ func (c *Command) PrintErr(i ...interface{}) {

// PrintErrln is a convenience method to Println to the defined Err output, fallback to Stderr if not set.
func (c *Command) PrintErrln(i ...interface{}) {
c.Print(fmt.Sprintln(i...))
c.PrintErr(fmt.Sprintln(i...))
}

// PrintErrf is a convenience method to Printf to the defined Err output, fallback to Stderr if not set.
func (c *Command) PrintErrf(format string, i ...interface{}) {
c.Print(fmt.Sprintf(format, i...))
c.PrintErr(fmt.Sprintf(format, i...))
}

// CommandPath returns the full path to this command.
Expand Down