9f82b75e57
* removed packer.Cache and references since packer.Cache is never used except in the download step. The download step now uses the new func packer.CachePath(targetPath) for this, the behavior is the same. * removed download code from packer that was reimplemented into the go-getter library: progress bar, http download restart, checksuming from file, skip already downloaded files, symlinking, make a download cancellable by context. * on windows if packer is running without symlinking rights and we are getting a local file, the file will be copied instead to avoid errors. * added unit tests for step_download that are now CI tested on windows, mac & linux. * files are now downloaded under cache dir `sha1(filename + "?checksum=" + checksum) + file_extension` * since the output dir is based on the source url and the checksum, when the checksum fails, the file is auto deleted. * a download file is protected and locked by a file lock, * updated docs * updated go modules and vendors |
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| .. | ||
| .gitignore | ||
| .travis.yml | ||
| LICENSE | ||
| README.md | ||
| appveyor.yml | ||
| flock.go | ||
| flock_unix.go | ||
| flock_winapi.go | ||
| flock_windows.go | ||
README.md
flock
flock implements a thread-safe sync.Locker interface for file locking. It also
includes a non-blocking TryLock() function to allow locking without blocking execution.
License
flock is released under the BSD 3-Clause License. See the LICENSE file for more details.
Go Compatibility
This package makes use of the context package that was introduced in Go 1.7. As such, this
package has an implicit dependency on Go 1.7+.
Installation
go get -u github.com/gofrs/flock
Usage
import "github.com/gofrs/flock"
fileLock := flock.New("/var/lock/go-lock.lock")
locked, err := fileLock.TryLock()
if err != nil {
// handle locking error
}
if locked {
// do work
fileLock.Unlock()
}
For more detailed usage information take a look at the package API docs on GoDoc.