* 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
If instance has a different DNS/search domain then "metadata" alone won't work. The FQDN of "metadata.google.internal" is included in hosts file, and will work regardless of DNS configuration. Alternatively the IP 169.254.169.254 can be used.
Because of deficiencies in the encrypted-PEM format, it's not always possible to detect an incorrect
password. In these cases no error will be returned but the decrypted DER bytes will be random noise.
this closes#3337
Mason, Elliot
Megan Marsh
Pratyush singhal
krisko
Adrien Delorme
Murcurio
Arnaud Dezandee
Mikhail Ushanov
Matthew Aynalem