Instead of using a hardcoded version prerelease string, which makes release automation difficult, set the version prerelease string from an environment variable via the go linker tool during compile time.
The environment variable `TF_RELEASE` should only be set via the `make bin` target, and thus leaves the version prerelease string unset. Otherwise, when running a local compile of terraform via the `make dev` makefile target, the version prerelease string is set to `"dev"`, as usual.
This also requires some changes to both the circonus and postgresql providers, as they directly used the `VersionPrerelease` constant. We now simply call the `VersionString()` function, which returns the proper interpolated version string with the prerelease string populated correctly.
`TF_RELEASE` is unset:
```sh
$ make dev
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/05/22 10:38:19 Generated command/internal_plugin_list.go
==> Removing old directory...
==> Building...
Number of parallel builds: 3
--> linux/amd64: github.com/hashicorp/terraform
==> Results:
total 209M
-rwxr-xr-x 1 jake jake 209M May 22 10:39 terraform
$ terraform version
Terraform v0.9.6-dev (fd472e4a86500606b03c314f70d11f2bc4bc84e5+CHANGES)
```
`TF_RELEASE` is set (mimicking the `make bin` target):
```sh
$ TF_RELEASE=1 make dev
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/05/22 10:40:39 Generated command/internal_plugin_list.go
==> Removing old directory...
==> Building...
Number of parallel builds: 3
--> linux/amd64: github.com/hashicorp/terraform
==> Results:
total 121M
-rwxr-xr-x 1 jake jake 121M May 22 10:42 terraform
$ terraform version
Terraform v0.9.6
```
According to https://github.com/hashicorp/errwrap
'{{err}}' has to be used instead of '%s'
Without this patch, error output from terraform is missing important information:
* aws_cloudwatch_log_group.logs: Error Getting CloudWatch Logs Tag List: %s
With this patch, I get the important information. E.g.:
* aws_cloudwatch_log_group.logs: Error Getting CloudWatch Logs Tag List: AccessDeniedException: User: arn:aws:sts::XYZ:assumed-role/AAA-BBB-CCC/terraform-assuming-role-assume-role-ReadOnly is not authorized to perform: logs:ListTagsLogGroup on resource: arn:aws:logs:us-east-1:XYZ:log-group:logs:log-stream:
Both libpq(3) and github.com/lib/pq both use `sslmode`. Prefer this vs
the non-standard `ssl_mode`. `ssl_mode` is supported for compatibility
but should be removed in the future.
Changelog: yes
Also don't specify the default and rely on github.com/lib/pq (which uses "required"
and is different than what libpq(3) uses, which is "preferred" and unsupported by
github.com/lib/pq).
Previously the provider accepted non-standard environment variables. We
now accept the standard PGHOST/PGUSER/PGPASSWORD variables that psql
uses in addition the older ones.
According to the libpq documentation, "prefer" is the default in the
underlying library and so setting a different default in the Terraform
layer would be a breaking change for existing users of this provider
whose servers do not have TLS correctly configured.
The docs now link to the libpq manual's discussion of the security
implications of each of the ssl_mode options, so the user can understand
the limitations of the "prefer" default and can make an informed decision
about which setting is appropriate for their situation.
Jake Champlin