* 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
Location is required by default because you must specify where to create
the resource group containing the packer resources.
When using build_resource_group_name you are specifying that packer
should use an existing resource group and so the location that resources
are in can be determined by fetching the information from the existing
group.
It is forbidden to pass both variables as it is easier and more
intuitive that the location comes from the group rather than ignore a
parameter.
Closes: #5655
* Created a new parameter for using existing resource groups
* Implemented logic to ensure temp_ and build_ can't both be used
* Implemented logic to ensure they can only be used in correct context
* Implemented tests for this logic
* Updated where required to ensure the process works
* More unit testing to assert customer's configuration.
* Further reduce the options that are needed to power an Azure build.
This seems like a much more manageable level.
* Update all of the examples to use a more current VM sku.
* Add an example for RHEL.
* Move from OpenSuSE to SuSE.
* Update the docs.