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Use an exit code of 1 on non-fatal errors and 2 on fatal errors.

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This commit is contained in:
Kevin Atkinson
2017-08-15 17:23:44 -04:00
parent 68abb41a9b
commit db11d7248a
1 changed files with 24 additions and 12 deletions
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36
cid-fmt/main.go
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@@ -15,7 +15,7 @@ import (
func usage() {
fmt.Fprintf(os.Stderr, "usage: %s [-b multibase-code] [-v cid-version] <fmt-str> <cid> ...\n\n", os.Args[0])
fmt.Fprintf(os.Stderr, "<fmt-str> is either 'prefix' or a printf style format string:\n%s", fmtRef)
os.Exit(1)
os.Exit(2)
}
const fmtRef = `
@@ -57,7 +57,7 @@ outer:
}
if len(args[1]) != 1 {
fmt.Fprintf(os.Stderr, "Error: Invalid multibase code: %s\n", args[1])
os.Exit(1)
os.Exit(2)
}
newBase = mb.Encoding(args[1][0])
args = args[2:]
@@ -72,7 +72,7 @@ outer:
verConv = toCidV1
default:
fmt.Fprintf(os.Stderr, "Error: Invalid cid version: %s\n", args[1])
os.Exit(1)
os.Exit(2)
}
args = args[2:]
default:
@@ -89,13 +89,14 @@ outer:
default:
if strings.IndexByte(fmtStr, '%') == -1 {
fmt.Fprintf(os.Stderr, "Error: Invalid format string: %s\n", fmtStr)
os.Exit(2)
}
}
for _, cidStr := range args[1:] {
base, cid, err := decode(cidStr)
if err != nil {
fmt.Fprintf(os.Stderr, "Error: %s: %v\n", cidStr, err)
fmt.Fprintf(os.Stdout, "!INVALID_CID!\n")
errorMsg("%s: %v", cidStr, err)
// Don't abort on a bad cid
continue
}
@@ -105,8 +106,8 @@ outer:
if verConv != nil {
cid, err = verConv(cid)
if err != nil {
fmt.Fprintf(os.Stderr, "Error: %s: %v\n", cidStr, err)
fmt.Fprintf(os.Stdout, "!CONVERSION_ERROR!\n")
fmt.Fprintf(os.Stdout, "!ERROR!\n")
errorMsg("%s: %v", cidStr, err)
// Don't abort on a bad conversion
continue
}
@@ -115,10 +116,20 @@ outer:
if err != nil {
fmt.Fprintf(os.Stderr, "Error: %v\n", err)
// An error here means a bad format string, no point in continuing
os.Exit(1)
os.Exit(2)
}
fmt.Fprintf(os.Stdout, "%s\n", str)
}
os.Exit(exitCode)
}
var exitCode = 0
func errorMsg(fmtStr string, a ...interface{}) {
fmt.Fprintf(os.Stderr, "Error: ")
fmt.Fprintf(os.Stderr, fmtStr, a...)
fmt.Fprintf(os.Stderr, "\n")
exitCode = 1
}
func decode(v string) (mb.Encoding, *c.Cid, error) {
@@ -150,6 +161,7 @@ const ERR_STR = "!ERROR!"
func fmtCid(fmtStr string, base mb.Encoding, cid *c.Cid) (string, error) {
p := cid.Prefix()
out := new(bytes.Buffer)
var err error
for i := 0; i < len(fmtStr); i++ {
if fmtStr[i] != '%' {
out.WriteByte(fmtStr[i])
@@ -186,7 +198,7 @@ func fmtCid(fmtStr string, base mb.Encoding, cid *c.Cid) (string, error) {
dec, err := mh.Decode(cid.Hash())
if err != nil {
out.WriteString(ERR_STR)
fmt.Fprintf(os.Stderr, "Error: %v\n", err)
errorMsg("%v", err)
continue
}
out.WriteString(encode(base, dec.Digest, fmtStr[i] == 'D'))
@@ -194,7 +206,7 @@ func fmtCid(fmtStr string, base mb.Encoding, cid *c.Cid) (string, error) {
str, err := cid.StringOfBase(base)
if err != nil {
out.WriteString(ERR_STR)
fmt.Fprintf(os.Stderr, "Error: %v\n", err)
errorMsg("%v", err)
continue
}
out.WriteString(str)
@@ -208,11 +220,11 @@ func fmtCid(fmtStr string, base mb.Encoding, cid *c.Cid) (string, error) {
p.MhLength,
)
default:
return "", fmt.Errorf("unrecognized specifier in format string: %c\n", fmtStr[i])
return "", fmt.Errorf("unrecognized specifier in format string: %c", fmtStr[i])
}
}
return out.String(), nil
return out.String(), err
}
func baseToString(base mb.Encoding) string {
@@ -244,7 +256,7 @@ func hashToString(num uint64) string {
func encode(base mb.Encoding, data []byte, strip bool) string {
str, err := mb.Encode(base, data)
if err != nil {
fmt.Fprintf(os.Stderr, "Error: %v\n", err)
errorMsg("%v", err)
return ERR_STR
}
if strip {