Add a ParseLevel funtion for loglevel string conversion

go.mod

@@ -3,8 +3,13 @@ module github.com/Masterminds/log-go
 go 1.15
 
 require (
-	github.com/fatih/color v1.10.0
-	github.com/sirupsen/logrus v1.7.0
+	github.com/fatih/color v1.13.0
+	github.com/mattn/go-colorable v0.1.12 // indirect
+	github.com/sirupsen/logrus v1.9.0
 	github.com/stretchr/testify v1.7.0
-	go.uber.org/zap v1.16.0
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.8.0 // indirect
+	go.uber.org/tools v0.0.0-20190618225709-2cfd321de3ee // indirect
+	go.uber.org/zap v1.21.0
+	honnef.co/go/tools v0.0.1-2019.2.3 // indirect
 )

go.sum

@@ -1,65 +1,111 @@
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fatih/color v1.10.0 h1:s36xzo75JdqLaaWoiEHk767eHiwo0598uUxyfiPkDsg=
 github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
+github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
+github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
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 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
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+github.com/sirupsen/logrus v1.9.0 h1:trlNQbNUG3OdDrDil03MCb1H2o9nJ1x4/5LYw7byDE0=
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-github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
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+go.uber.org/goleak v1.1.11/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
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 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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log.go

@@ -1,5 +1,10 @@
 package log
 
+import (
+	"fmt"
+	"strings"
+)
+
 // Fields represents a map of key-value pairs where the value can be any Go
 // type. The value must be able to be converted to a string.
 type Fields map[string]interface{}
@@ -84,6 +89,35 @@ type Logger interface {
 	Fatalw(msg string, fields Fields)
 }
 
+// Level represents the numerical equivilence to the string loglevel
+type Level int
+
+// ParseLevel returns the loglevel integer associated with a common loglevel
+// string representation.
+func ParseLevel(loglevelStr string) (level Level, err error) {
+	switch strings.ToLower(loglevelStr) {
+	case "trace":
+		level = TraceLevel
+	case "debug":
+		level = DebugLevel
+	case "info":
+		level = InfoLevel
+	case "warn":
+		level = WarnLevel
+	case "warning":
+		level = WarnLevel
+	case "error":
+		level = ErrorLevel
+	case "panic":
+		level = PanicLevel
+	case "fatal":
+		level = FatalLevel
+	default:
+		err = fmt.Errorf("unknown loglevel: %s", loglevelStr)
+	}
+	return
+}
+
 // Current contains the logger used for the package level logging functions
 var Current Logger
 

log_test.go

@@ -154,6 +154,29 @@ func TestInterface(t *testing.T) {
 	buf.Reset()
 }
 
+func TestParseLevel(t *testing.T) {
+	names := []string{"Trace", "Debug", "Info", "Warn", "Warning", "Error", "Panic", "Fatal"}
+	levels := []Level{TraceLevel, DebugLevel, InfoLevel, WarnLevel, WarnLevel, ErrorLevel, PanicLevel, FatalLevel}
+	if len(names) != len(levels) {
+		t.Fatal("inconsistent number of elements in test")
+	}
+	for n := range names {
+		name := names[n]
+		level := levels[n]
+		testLevel, err := ParseLevel(name)
+		if err != nil {
+			t.Errorf("name to level translation returned: %v", err)
+		}
+		if testLevel != level {
+			t.Errorf("incorrect loglevel (%d) set by name \"%s\"", level, name)
+		}
+	}
+	_, err := ParseLevel("fakeName")
+	if err == nil {
+		t.Error("fake loglevel name failed to return an error")
+	}
+}
+
 type testLogger struct {
 	logger *bytes.Buffer
 }