1 files changed, 100 insertions, 0 deletions

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
+}