#6636 inadvertently changed the minimum Go version
requirement to 1.16 since ReadFile was moved in that
version. Switch back to ioutil.ReadFile to avoid forcing
an upgrade at this time.
Some YAML parsers don't correctly handle Byte-order marks,
so automatically strip it off during load.
Related to #423
Co-authored-by: Justin Van Patten <jvp@justinvp.com>
* [sdk/go] Cache loaded configuration files
Previously, the CLI did not cache configuration files, which
required a read from disk + unmarshalling + validation each
time a consumer needed to read one of these configurations.
This change introduces global caches for each type of Pulumi
configuration file (Project, ProjectStack, PolicyPackProject, and
PluginProject). The configuration is cached after the first request
and the cached value will be used for any subsequent operations.
Important note: The global configurations are not concurrency safe,
but this same problem exists using the previous method of
reading/writing config files on disk. Synchronization
will be added in a follow up change to allow for concurrency safe config
operations.
