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Fix build for GOARCH=wasm GOOS=js GOOS=wasip1
Fixes the following build failures: GOOS=js GOARCH=wasm go build ./... GOOS=wasip1 GOARCH=wasm go build ./... Depends on: dgraph-io/ristretto#375 Signed-off-by: Christian Stewart <christian@aperture.us>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| //go:build js || wasip1 | ||
| // +build js wasip1 | ||
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| /* | ||
| * Copyright 2017 Dgraph Labs, Inc. and Contributors | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package badger | ||
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| import ( | ||
| "fmt" | ||
| "os" | ||
| "path/filepath" | ||
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| "github.com/dgraph-io/badger/v4/y" | ||
| ) | ||
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| // directoryLockGuard holds a lock on a directory and a pid file inside. The pid file isn't part | ||
| // of the locking mechanism, it's just advisory. | ||
| type directoryLockGuard struct { | ||
| // File handle on the directory, which we've flocked. | ||
| f *os.File | ||
| // The absolute path to our pid file. | ||
| path string | ||
| // Was this a shared lock for a read-only database? | ||
| readOnly bool | ||
| } | ||
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| // acquireDirectoryLock gets a lock on the directory (using flock). If | ||
| // this is not read-only, it will also write our pid to | ||
| // dirPath/pidFileName for convenience. | ||
| func acquireDirectoryLock(dirPath string, pidFileName string, readOnly bool) ( | ||
| *directoryLockGuard, error) { | ||
| // Convert to absolute path so that Release still works even if we do an unbalanced | ||
| // chdir in the meantime. | ||
| absPidFilePath, err := filepath.Abs(filepath.Join(dirPath, pidFileName)) | ||
| if err != nil { | ||
| return nil, y.Wrapf(err, "cannot get absolute path for pid lock file") | ||
| } | ||
| f, err := os.Open(dirPath) | ||
| if err != nil { | ||
| return nil, y.Wrapf(err, "cannot open directory %q", dirPath) | ||
| } | ||
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| // NOTE: Here is where we would normally call flock. | ||
| // This is not supported in js / wasm, so skip it. | ||
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| if !readOnly { | ||
| // Yes, we happily overwrite a pre-existing pid file. We're the | ||
| // only read-write badger process using this directory. | ||
| err = os.WriteFile(absPidFilePath, []byte(fmt.Sprintf("%d\n", os.Getpid())), 0666) | ||
| if err != nil { | ||
| f.Close() | ||
| return nil, y.Wrapf(err, | ||
| "Cannot write pid file %q", absPidFilePath) | ||
| } | ||
| } | ||
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| return &directoryLockGuard{f, absPidFilePath, readOnly}, nil | ||
| } | ||
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| // Release deletes the pid file and releases our lock on the directory. | ||
| func (guard *directoryLockGuard) release() error { | ||
| var err error | ||
| if !guard.readOnly { | ||
| // It's important that we remove the pid file first. | ||
| err = os.Remove(guard.path) | ||
| } | ||
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| if closeErr := guard.f.Close(); err == nil { | ||
| err = closeErr | ||
| } | ||
| guard.path = "" | ||
| guard.f = nil | ||
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| return err | ||
| } | ||
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| // openDir opens a directory for syncing. | ||
| func openDir(path string) (*os.File, error) { return os.Open(path) } | ||
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| // When you create or delete a file, you have to ensure the directory entry for the file is synced | ||
| // in order to guarantee the file is visible (if the system crashes). (See the man page for fsync, | ||
| // or see https://github.com/coreos/etcd/issues/6368 for an example.) | ||
| func syncDir(dir string) error { | ||
| f, err := openDir(dir) | ||
| if err != nil { | ||
| return y.Wrapf(err, "While opening directory: %s.", dir) | ||
| } | ||
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| err = f.Sync() | ||
| closeErr := f.Close() | ||
| if err != nil { | ||
| return y.Wrapf(err, "While syncing directory: %s.", dir) | ||
| } | ||
| return y.Wrapf(closeErr, "While closing directory: %s.", dir) | ||
| } |
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