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Re-introduce DEBUG env var stack traces

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Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>
This commit is contained in:
Ahmet Alp Balkan 2020-04-12 17:57:27 -07:00
parent 195e6315da
commit 077d8a829d
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GPG Key ID: 441833503E604E2C
4 changed files with 19 additions and 12 deletions
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3
cmd/kubectx/env.go
View File

@ -14,6 +14,9 @@ const (
// EnvForceColor describes the "internal" environment variable to force
// color usage to show current context in a list.
EnvForceColor = `_KUBECTX_FORCE_COLOR`
// EnvDebug describes the internal environment variable for more verbose logging.
EnvDebug = `DEBUG`
)
func useColors() bool {

7
cmd/kubectx/flags.go
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@ -1,11 +1,10 @@
package main
import (
"fmt"
"io"
"os"
"strings"
"github.com/pkg/errors"
)
type Op interface {
@ -50,9 +49,9 @@ func parseArgs(argv []string) Op {
}
if strings.HasPrefix(v, "-") && v != "-" {
return UnsupportedOp{Err: errors.Errorf("unsupported option %s", v)}
return UnsupportedOp{Err: fmt.Errorf("unsupported option '%s'", v)}
}
return SwitchOp{Target: argv[0]}
}
return UnsupportedOp{Err: errors.New("too many arguments")}
return UnsupportedOp{Err: fmt.Errorf("too many arguments")}
}

7
cmd/kubectx/flags_test.go
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@ -1,10 +1,10 @@
package main
import (
"fmt"
"testing"
"github.com/google/go-cmp/cmp"
"github.com/pkg/errors"
)
func Test_parseArgs_new(t *testing.T) {
@ -60,7 +60,10 @@ func Test_parseArgs_new(t *testing.T) {
want: RenameOp{"a", "."}},
{name: "unrecognized flag",
args: []string{"-x"},
want: UnsupportedOp{Err: errors.Errorf("unsupported option \"-x\"")}},
want: UnsupportedOp{Err: fmt.Errorf("unsupported option \"-x\"")}},
{name: "too many args",
args: []string{"a", "b", "c"},
want: UnsupportedOp{Err: fmt.Errorf("too many arguments")}},
// TODO add more UnsupportedOp cases
// TODO consider these cases

14
cmd/kubectx/main.go
View File

@ -9,18 +9,20 @@ import (
)
func main() {
// parse command-line flags
var op Op
op = parseArgs(os.Args[1:])
op := parseArgs(os.Args[1:])
if err := op.Run(os.Stdout, os.Stderr); err != nil {
printError(os.Stderr, err.Error())
os.Exit(1)
if _, ok := os.LookupEnv(EnvDebug); ok {
// print stack trace in verbose mode
fmt.Fprintf(os.Stderr, "[DEBUG] error: %+v\n", err)
}
defer os.Exit(1)
}
}
func printError(w io.Writer, format string, args ...interface{}) {
fmt.Fprintf(os.Stderr, color.RedString("error: ")+format+"\n", args...)
fmt.Fprintf(w, color.RedString("error: ")+format+"\n", args...)
}
func printWarning(w io.Writer, format string, args ...interface{}) {