From bae9f6d2fd5eb5bc80929bd393932b23f14d7c93 Mon Sep 17 00:00:00 2001
From: Jake Champlin <jake.champlin.27@gmail.com>
Date: Tue, 6 Jun 2017 12:40:07 -0400
Subject: Initial transfer of provider code

---
 .../hashicorp/terraform/helper/logging/logging.go  | 100 +++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 vendor/github.com/hashicorp/terraform/helper/logging/logging.go

(limited to 'vendor/github.com/hashicorp/terraform/helper/logging/logging.go')

diff --git a/vendor/github.com/hashicorp/terraform/helper/logging/logging.go b/vendor/github.com/hashicorp/terraform/helper/logging/logging.go
new file mode 100644
index 0000000..433cd77
--- /dev/null
+++ b/vendor/github.com/hashicorp/terraform/helper/logging/logging.go
@@ -0,0 +1,100 @@
+package logging
+
+import (
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"strings"
+	"syscall"
+
+	"github.com/hashicorp/logutils"
+)
+
+// These are the environmental variables that determine if we log, and if
+// we log whether or not the log should go to a file.
+const (
+	EnvLog     = "TF_LOG"      // Set to True
+	EnvLogFile = "TF_LOG_PATH" // Set to a file
+)
+
+var validLevels = []logutils.LogLevel{"TRACE", "DEBUG", "INFO", "WARN", "ERROR"}
+
+// LogOutput determines where we should send logs (if anywhere) and the log level.
+func LogOutput() (logOutput io.Writer, err error) {
+	logOutput = ioutil.Discard
+
+	logLevel := LogLevel()
+	if logLevel == "" {
+		return
+	}
+
+	logOutput = os.Stderr
+	if logPath := os.Getenv(EnvLogFile); logPath != "" {
+		var err error
+		logOutput, err = os.OpenFile(logPath, syscall.O_CREAT|syscall.O_RDWR|syscall.O_APPEND, 0666)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	// This was the default since the beginning
+	logOutput = &logutils.LevelFilter{
+		Levels:   validLevels,
+		MinLevel: logutils.LogLevel(logLevel),
+		Writer:   logOutput,
+	}
+
+	return
+}
+
+// SetOutput checks for a log destination with LogOutput, and calls
+// log.SetOutput with the result. If LogOutput returns nil, SetOutput uses
+// ioutil.Discard. Any error from LogOutout is fatal.
+func SetOutput() {
+	out, err := LogOutput()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if out == nil {
+		out = ioutil.Discard
+	}
+
+	log.SetOutput(out)
+}
+
+// LogLevel returns the current log level string based the environment vars
+func LogLevel() string {
+	envLevel := os.Getenv(EnvLog)
+	if envLevel == "" {
+		return ""
+	}
+
+	logLevel := "TRACE"
+	if isValidLogLevel(envLevel) {
+		// allow following for better ux: info, Info or INFO
+		logLevel = strings.ToUpper(envLevel)
+	} else {
+		log.Printf("[WARN] Invalid log level: %q. Defaulting to level: TRACE. Valid levels are: %+v",
+			envLevel, validLevels)
+	}
+
+	return logLevel
+}
+
+// IsDebugOrHigher returns whether or not the current log level is debug or trace
+func IsDebugOrHigher() bool {
+	level := string(LogLevel())
+	return level == "DEBUG" || level == "TRACE"
+}
+
+func isValidLogLevel(level string) bool {
+	for _, l := range validLevels {
+		if strings.ToUpper(level) == string(l) {
+			return true
+		}
+	}
+
+	return false
+}
-- 
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