This change will vendor the new version of the exoscale-import
post-processor component, but remove all of its code from Packer. After
the v1.8.0 release this change should be removed entirely.
This vendor process is being used as a workaround for decoupling the
exoscale-import component without causing a breaking change in Packer.
Users of Exoscale are encouraged to leverage `packer init` for
installing the latest version of packer-plugin-exoscale.
* 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
Wilken Rivera
Gennady Lipenkov
Adrien Delorme
Guillaume J. Charmes
Megan Marsh