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author | Christopher Speller <crspeller@gmail.com> | 2018-04-27 14:12:01 -0700 |
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committer | Christopher Speller <crspeller@gmail.com> | 2018-04-27 14:12:01 -0700 |
commit | eb9ff34fcfa51cd8205841a02f3d3d61ec5be8fa (patch) | |
tree | ed01fd9488bd86f6c2daf0b299dff5beb43973db /vendor/go.uber.org/zap/writer.go | |
parent | 2386acb3ddabd8827e21b1862c338a8b13a25de6 (diff) | |
parent | 2e6b3da1d3466db379fef0d61a23e2878d17ee9d (diff) | |
download | chat-eb9ff34fcfa51cd8205841a02f3d3d61ec5be8fa.tar.gz chat-eb9ff34fcfa51cd8205841a02f3d3d61ec5be8fa.tar.bz2 chat-eb9ff34fcfa51cd8205841a02f3d3d61ec5be8fa.zip |
Merge branch 'master' into advanced-permissions-phase-2
Diffstat (limited to 'vendor/go.uber.org/zap/writer.go')
-rw-r--r-- | vendor/go.uber.org/zap/writer.go | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/vendor/go.uber.org/zap/writer.go b/vendor/go.uber.org/zap/writer.go new file mode 100644 index 000000000..16f55ce48 --- /dev/null +++ b/vendor/go.uber.org/zap/writer.go @@ -0,0 +1,96 @@ +// 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 ( + "io/ioutil" + "os" + + "go.uber.org/zap/zapcore" + + "go.uber.org/multierr" +) + +// Open is a high-level wrapper that takes a variadic number of paths, opens or +// creates each of the specified files, and combines them into a locked +// WriteSyncer. It also returns any error encountered and a function to close +// any opened files. +// +// Passing no paths returns a no-op WriteSyncer. The special paths "stdout" and +// "stderr" are interpreted as os.Stdout and os.Stderr, respectively. +func Open(paths ...string) (zapcore.WriteSyncer, func(), error) { + writers, close, err := open(paths) + if err != nil { + return nil, nil, err + } + + writer := CombineWriteSyncers(writers...) + return writer, close, nil +} + +func open(paths []string) ([]zapcore.WriteSyncer, func(), error) { + var openErr error + writers := make([]zapcore.WriteSyncer, 0, len(paths)) + files := make([]*os.File, 0, len(paths)) + close := func() { + for _, f := range files { + f.Close() + } + } + for _, path := range paths { + switch path { + case "stdout": + writers = append(writers, os.Stdout) + // Don't close standard out. + continue + case "stderr": + writers = append(writers, os.Stderr) + // Don't close standard error. + continue + } + f, err := os.OpenFile(path, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0644) + openErr = multierr.Append(openErr, err) + if err == nil { + writers = append(writers, f) + files = append(files, f) + } + } + + if openErr != nil { + close() + return writers, nil, openErr + } + + return writers, close, nil +} + +// CombineWriteSyncers is a utility that combines multiple WriteSyncers into a +// single, locked WriteSyncer. If no inputs are supplied, it returns a no-op +// WriteSyncer. +// +// It's provided purely as a convenience; the result is no different from +// using zapcore.NewMultiWriteSyncer and zapcore.Lock individually. +func CombineWriteSyncers(writers ...zapcore.WriteSyncer) zapcore.WriteSyncer { + if len(writers) == 0 { + return zapcore.AddSync(ioutil.Discard) + } + return zapcore.Lock(zapcore.NewMultiWriteSyncer(writers...)) +} |