From 1e5c432e1029601a664454388ae366ef69618d62 Mon Sep 17 00:00:00 2001
From: Christopher Speller <crspeller@gmail.com>
Date: Mon, 25 Jun 2018 12:33:13 -0700
Subject: MM-10702 Moving plugins to use hashicorp go-plugin. (#8978)

* Moving plugins to use hashicorp go-plugin.

* Tweaks from feedback.
---
 vendor/github.com/hashicorp/go-hclog/log.go | 157 ++++++++++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 vendor/github.com/hashicorp/go-hclog/log.go

(limited to 'vendor/github.com/hashicorp/go-hclog/log.go')

diff --git a/vendor/github.com/hashicorp/go-hclog/log.go b/vendor/github.com/hashicorp/go-hclog/log.go
new file mode 100644
index 000000000..362924887
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-hclog/log.go
@@ -0,0 +1,157 @@
+package hclog
+
+import (
+	"io"
+	"log"
+	"os"
+	"strings"
+	"sync"
+)
+
+var (
+	DefaultOutput = os.Stderr
+	DefaultLevel  = Info
+)
+
+type Level int
+
+const (
+	// This is a special level used to indicate that no level has been
+	// set and allow for a default to be used.
+	NoLevel Level = 0
+
+	// The most verbose level. Intended to be used for the tracing of actions
+	// in code, such as function enters/exits, etc.
+	Trace Level = 1
+
+	// For programmer lowlevel analysis.
+	Debug Level = 2
+
+	// For information about steady state operations.
+	Info Level = 3
+
+	// For information about rare but handled events.
+	Warn Level = 4
+
+	// For information about unrecoverable events.
+	Error Level = 5
+)
+
+// When processing a value of this type, the logger automatically treats the first
+// argument as a Printf formatting string and passes the rest as the values to be
+// formatted. For example: L.Info(Fmt{"%d beans/day", beans}). This is a simple
+// convience type for when formatting is required.
+type Format []interface{}
+
+// Fmt returns a Format type. This is a convience function for creating a Format
+// type.
+func Fmt(str string, args ...interface{}) Format {
+	return append(Format{str}, args...)
+}
+
+// LevelFromString returns a Level type for the named log level, or "NoLevel" if
+// the level string is invalid. This facilitates setting the log level via
+// config or environment variable by name in a predictable way.
+func LevelFromString(levelStr string) Level {
+	// We don't care about case. Accept "INFO" or "info"
+	levelStr = strings.ToLower(strings.TrimSpace(levelStr))
+	switch levelStr {
+	case "trace":
+		return Trace
+	case "debug":
+		return Debug
+	case "info":
+		return Info
+	case "warn":
+		return Warn
+	case "error":
+		return Error
+	default:
+		return NoLevel
+	}
+}
+
+// The main Logger interface. All code should code against this interface only.
+type Logger interface {
+	// Args are alternating key, val pairs
+	// keys must be strings
+	// vals can be any type, but display is implementation specific
+	// Emit a message and key/value pairs at the TRACE level
+	Trace(msg string, args ...interface{})
+
+	// Emit a message and key/value pairs at the DEBUG level
+	Debug(msg string, args ...interface{})
+
+	// Emit a message and key/value pairs at the INFO level
+	Info(msg string, args ...interface{})
+
+	// Emit a message and key/value pairs at the WARN level
+	Warn(msg string, args ...interface{})
+
+	// Emit a message and key/value pairs at the ERROR level
+	Error(msg string, args ...interface{})
+
+	// Indicate if TRACE logs would be emitted. This and the other Is* guards
+	// are used to elide expensive logging code based on the current level.
+	IsTrace() bool
+
+	// Indicate if DEBUG logs would be emitted. This and the other Is* guards
+	IsDebug() bool
+
+	// Indicate if INFO logs would be emitted. This and the other Is* guards
+	IsInfo() bool
+
+	// Indicate if WARN logs would be emitted. This and the other Is* guards
+	IsWarn() bool
+
+	// Indicate if ERROR logs would be emitted. This and the other Is* guards
+	IsError() bool
+
+	// Creates a sublogger that will always have the given key/value pairs
+	With(args ...interface{}) Logger
+
+	// Create a logger that will prepend the name string on the front of all messages.
+	// If the logger already has a name, the new value will be appended to the current
+	// name. That way, a major subsystem can use this to decorate all it's own logs
+	// without losing context.
+	Named(name string) Logger
+
+	// Create a logger that will prepend the name string on the front of all messages.
+	// This sets the name of the logger to the value directly, unlike Named which honor
+	// the current name as well.
+	ResetNamed(name string) Logger
+
+	// Return a value that conforms to the stdlib log.Logger interface
+	StandardLogger(opts *StandardLoggerOptions) *log.Logger
+}
+
+type StandardLoggerOptions struct {
+	// Indicate that some minimal parsing should be done on strings to try
+	// and detect their level and re-emit them.
+	// This supports the strings like [ERROR], [ERR] [TRACE], [WARN], [INFO],
+	// [DEBUG] and strip it off before reapplying it.
+	InferLevels bool
+}
+
+type LoggerOptions struct {
+	// Name of the subsystem to prefix logs with
+	Name string
+
+	// The threshold for the logger. Anything less severe is supressed
+	Level Level
+
+	// Where to write the logs to. Defaults to os.Stdout if nil
+	Output io.Writer
+
+	// An optional mutex pointer in case Output is shared
+	Mutex *sync.Mutex
+
+	// Control if the output should be in JSON.
+	JSONFormat bool
+
+	// Include file and line information in each log line
+	IncludeLocation bool
+
+	// The time format to use instead of the default
+	TimeFormat string
+}
-- 
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