Use caddy's certmagic library for extensible/robust ACME handling (#14177)

* use certmagic for more extensible/robust ACME cert handling

* accept TOS based on config option

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lauris BH <lauris@nix.lv>

1 files changed, 132 insertions, 0 deletions

diff --git a/vendor/go.uber.org/zap/level.go b/vendor/go.uber.org/zap/level.go
new file mode 100644
index 0000000000..3567a9a1e6
--- /dev/null
+++ b/vendor/go.uber.org/zap/level.go
@@ -0,0 +1,132 @@
+// Copyright (c) 2016 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package zap
+
+import (
+	"go.uber.org/atomic"
+	"go.uber.org/zap/zapcore"
+)
+
+const (
+	// DebugLevel logs are typically voluminous, and are usually disabled in
+	// production.
+	DebugLevel = zapcore.DebugLevel
+	// InfoLevel is the default logging priority.
+	InfoLevel = zapcore.InfoLevel
+	// WarnLevel logs are more important than Info, but don't need individual
+	// human review.
+	WarnLevel = zapcore.WarnLevel
+	// ErrorLevel logs are high-priority. If an application is running smoothly,
+	// it shouldn't generate any error-level logs.
+	ErrorLevel = zapcore.ErrorLevel
+	// DPanicLevel logs are particularly important errors. In development the
+	// logger panics after writing the message.
+	DPanicLevel = zapcore.DPanicLevel
+	// PanicLevel logs a message, then panics.
+	PanicLevel = zapcore.PanicLevel
+	// FatalLevel logs a message, then calls os.Exit(1).
+	FatalLevel = zapcore.FatalLevel
+)
+
+// LevelEnablerFunc is a convenient way to implement zapcore.LevelEnabler with
+// an anonymous function.
+//
+// It's particularly useful when splitting log output between different
+// outputs (e.g., standard error and standard out). For sample code, see the
+// package-level AdvancedConfiguration example.
+type LevelEnablerFunc func(zapcore.Level) bool
+
+// Enabled calls the wrapped function.
+func (f LevelEnablerFunc) Enabled(lvl zapcore.Level) bool { return f(lvl) }
+
+// An AtomicLevel is an atomically changeable, dynamic logging level. It lets
+// you safely change the log level of a tree of loggers (the root logger and
+// any children created by adding context) at runtime.
+//
+// The AtomicLevel itself is an http.Handler that serves a JSON endpoint to
+// alter its level.
+//
+// AtomicLevels must be created with the NewAtomicLevel constructor to allocate
+// their internal atomic pointer.
+type AtomicLevel struct {
+	l *atomic.Int32
+}
+
+// NewAtomicLevel creates an AtomicLevel with InfoLevel and above logging
+// enabled.
+func NewAtomicLevel() AtomicLevel {
+	return AtomicLevel{
+		l: atomic.NewInt32(int32(InfoLevel)),
+	}
+}
+
+// NewAtomicLevelAt is a convenience function that creates an AtomicLevel
+// and then calls SetLevel with the given level.
+func NewAtomicLevelAt(l zapcore.Level) AtomicLevel {
+	a := NewAtomicLevel()
+	a.SetLevel(l)
+	return a
+}
+
+// Enabled implements the zapcore.LevelEnabler interface, which allows the
+// AtomicLevel to be used in place of traditional static levels.
+func (lvl AtomicLevel) Enabled(l zapcore.Level) bool {
+	return lvl.Level().Enabled(l)
+}
+
+// Level returns the minimum enabled log level.
+func (lvl AtomicLevel) Level() zapcore.Level {
+	return zapcore.Level(int8(lvl.l.Load()))
+}
+
+// SetLevel alters the logging level.
+func (lvl AtomicLevel) SetLevel(l zapcore.Level) {
+	lvl.l.Store(int32(l))
+}
+
+// String returns the string representation of the underlying Level.
+func (lvl AtomicLevel) String() string {
+	return lvl.Level().String()
+}
+
+// UnmarshalText unmarshals the text to an AtomicLevel. It uses the same text
+// representations as the static zapcore.Levels ("debug", "info", "warn",
+// "error", "dpanic", "panic", and "fatal").
+func (lvl *AtomicLevel) UnmarshalText(text []byte) error {
+	if lvl.l == nil {
+		lvl.l = &atomic.Int32{}
+	}
+
+	var l zapcore.Level
+	if err := l.UnmarshalText(text); err != nil {
+		return err
+	}
+
+	lvl.SetLevel(l)
+	return nil
+}
+
+// MarshalText marshals the AtomicLevel to a byte slice. It uses the same
+// text representation as the static zapcore.Levels ("debug", "info", "warn",
+// "error", "dpanic", "panic", and "fatal").
+func (lvl AtomicLevel) MarshalText() (text []byte, err error) {
+	return lvl.Level().MarshalText()
+}