Commit Graph

16 Commits

Author SHA1 Message Date
James Bardin 54998933f5 load Meta.PluginOverrides in dicovery
Make sure the override paths from the legacy rc file are loaded for
discovery.
2017-08-09 11:14:33 -04:00
James Bardin 4893fcc24f improve plugin error formatting
Remove "checksum" from the error, and only indicate that the plugin has
changed.

Always show requested versions even if it's "any", and found versions of
plugins.
2017-06-22 15:31:36 -04:00
James Bardin 103ab20b00 add required and found versions to error output
Provide the user with feedback showing the version requirements and the
versions found when there's is a plugin error
2017-06-22 14:20:50 -04:00
James Bardin 7a955f990c make display plugin checksum error to user
The error follows a generic message, so can be ignored by users who may
not understand the implications.
2017-06-22 13:38:55 -04:00
James Bardin be2069ac81 add -plugin-dir option
The -plugin-dir option lets the user specify custom search paths for
plugins. This overrides all other plugin search paths, and prevents the
auto-installation of plugins.

We also make sure that the availability of plugins is always checked
during init, even if -get-plugins=false or -plugin-dir is set.
2017-06-15 15:23:16 -04:00
James Bardin 000e860706 Add plugin dir scaffolding
add pluginDir to command.Meta, the flag to initialize it, and the
methods to save and restore it.
2017-06-15 14:26:12 -04:00
James Bardin f723270e3e search the vendor directory for plugins
The default location for users to manually add plugins will be
./terraform.d/plugins/
2017-06-15 10:12:00 -04:00
Martin Atkins f753974bb3 plugin/discovery: Installer interface, and provider implementation
Previously we had a "getProvider" function type used to implement plugin
fetching. Here we replace that with an interface type, initially with
just a "Get" function.

For now this just simplifies the interface by allowing the target
directory and protocol version to be members of the struct rather than
passed as arguments.

A later change will extend this interface to also include a method to
purge unused plugins, so that upgrading frequently doesn't leave behind
a trail of unused executable files.
2017-06-13 12:28:07 -07:00
James Bardin fdbfc17fae missing constraints passed erroniously
ConstrainVersions was documented as returning nil, but it was instead
returning an empty set. Use the Count() method to check for nil or
empty. Add test to verify failed constraints will show up as missing.
2017-06-09 14:03:59 -07:00
Martin Atkins 032f71f1ff command: produce provider lock file during "terraform init"
Once we've installed the necessary plugins, we'll do one more walk of
the available plugins and record the SHA256 hashes of all of the plugins
we select in the provider lock file.

The file we write here gets read when we're building ContextOpts to
initialize the main terraform context, so any command that works with
the context will then fail if any of the provider binaries change.
2017-06-09 14:03:59 -07:00
Martin Atkins 7d0a98af46 command: provider resolver to also check SHA256 constraints when set
In addition to looking for matching versions, the caller can also
optionally require a specific executable by its SHA256 digest.
2017-06-09 14:03:59 -07:00
James Bardin 66ebff90cd move some more plugin search path logic to command
Make less to change when we remove the old search path
2017-06-09 14:03:59 -07:00
James Bardin 2749946f5c basic plugin getter
Add discovery.GetProviders to fetch plugins from the relases site.

This is an early version, with no tests, that only (probably) fetches
plugins from the default location. The URLs are still subject to change,
and since there are no plugin releases, it doesn't work at all yet.
2017-06-09 14:03:59 -07:00
Martin Atkins 7ca592ac06 core: use ResourceProviderResolver to resolve providers
Previously the set of providers was fixed early on in the command package
processing. In order to be version-aware we need to defer this work until
later, so this interface exists so we can hold on to the possibly-many
versions of plugins we have available and then later, once we've finished
determining the provider dependencies, select the appropriate version of
each provider to produce the final set of providers to use.

This commit establishes the use of this new mechanism, and thus populates
the provider factory map with only the providers that result from the
dependency resolution process.

This disables support for internal provider plugins, though the
mechanisms for building and launching these are still here vestigially,
to be cleaned up in a subsequent commit.

This also adds a new awkward quirk to the "terraform import" workflow
where one can't import a resource from a provider that isn't already
mentioned (implicitly or explicitly) in config. We will do some UX work
in subsequent commits to make this behavior better.

This breaks many tests due to the change in interface, but to keep this
particular diff reasonably easy to read the test fixes are split into
a separate commit.
2017-06-09 14:03:59 -07:00
Martin Atkins 9b4f15c261 plugin: move Client function into plugin, from plugin/discovery
Having this as a method of PluginMeta felt most natural, but unfortunately
that means that discovery must depend on plugin and plugin in turn
depends on core Terraform, thus making the discovery package hard to use
without creating dependency cycles.

To resolve this, we invert the dependency and make the plugin package be
responsible for instantiating clients given a meta, using a top-level
function.
2017-06-09 14:03:59 -07:00
Martin Atkins 8364383c35 Push plugin discovery down into command package
Previously we did plugin discovery in the main package, but as we move
towards versioned plugins we need more information available in order to
resolve plugins, so we move this responsibility into the command package
itself.

For the moment this is just preserving the existing behavior as long as
there are only internal and unversioned plugins present. This is the
final state for provisioners in 0.10, since we don't want to support
versioned provisioners yet. For providers this is just a checkpoint along
the way, since further work is required to apply version constraints from
configuration and support additional plugin search directories.

The automatic plugin discovery behavior is not desirable for tests because
we want to mock the plugins there, so we add a new backdoor for the tests
to use to skip the plugin discovery and just provide their own mock
implementations. Most of this diff is thus noisy rework of the tests to
use this new mechanism.
2017-06-09 14:03:59 -07:00