Along with all of the other information we previously reported in the
"terraform version" output, we'll now include the name of the current
platform as our provider mechanisms represent it.
This is addressing a long-standing minor annoyance where we often can't
tell from an incomplete bug report which platform Terraform was running
on, and incomplete bug reporters do tend to at least include the
"terraform version" output even if they don't also include the requested
full trace log.
However, what motivated doing it _now_ is that anyone building a provider
registry or mirror needs to have some awareness of these platform
identifiers which have been, until v0.13, mostly an implementation detail.
This additional information is a small thing we can do to help registry
builders find out what the platform identifier ought to be for each of
the platforms they aim to support, even if some of them are platforms
which the Go compiler allows but which HashiCorp doesn't officially
support.
The new information is on a line of its own in the output as a pragmatic
way to avoid breaking anyone who might be using something like
$(terraform version | head -n1) to print a brief Terraform version
identifier into some logs. That's not an interface we officially support
for machine consumption, but it's easy to avoid breaking it here and so we
won't do so.
This changes the approach used by the provider installer to remember
between runs which selections it has previously made, using the lock file
format implemented in internal/depsfile.
This means that version constraints in the configuration are considered
only for providers we've not seen before or when -upgrade mode is active.
helper/copy CopyDir was used heavily in tests. It differes from
internal/copydir in a few ways, the main one being that it creates the
dst directory while the internal version expected the dst to exist
(there are other differences, which is why I did not just switch tests
to using internal's CopyDir).
I moved the CopyDir func from helper/copy into command_test.go; I could
also have moved it into internal/copy and named it something like
CreateDirAndCopy so if that seems like a better option please let me
know.
helper/copy/CopyFile was used in a couple of spots so I moved it into
internal, at which point I thought it made more sense to rename the
package copy (instead of copydir).
There's also a `go mod tidy` included.
We globally support a -v/-version/--version flag, which triggers the
version subcommand. The recent introduction of JSON output support meant
we started parsing the flags for the first time, but we didn't add flags
for these global version arguments.
This commit adds those flags (but doesn't check them, since they have no
effect on the version command itself). Also adds usage information for
terraform version.
