README ¶
Terraform Transform Data Sources
Overview
This provider defines a set of data sources providing data transformation primitives missing from core Terraform.
Data Sources
This plugin defines following data sources:
transform_group_by_value
- group map keys by map values
Reference
transform_group_by_value
Arguments
The following arguments are supported:
input
- (Required) A map with both keys and values as stringsextract
- (Required) A key (one of values in theinput
) which value should be returned in output after the grouping. Because of Terraform limitation it's not possible to return the full grouped map (which would be a map of strings to lists).
Attributes
The following attribute is exported:
output
- A list of keys frominput
that containextract
value. Sorted in lexicographical order.
Installation
Terraform automatically discovers the Providers when it parses configuration files. This only occurs when the init command is executed.
Currently Terraform is able to automatically download only official plugins distributed by HashiCorp.
All other plugins should be installed manually.
Terraform will search for matching Providers via a Discovery process, including the current local directory.
This means that the plugin should either be placed into current working directory where Terraform will be executed from or it can be installed system-wide.
Usage
main.tf
locals {
input = {
"aaa/bbb/111" = "val1"
"aaa/ccc/111" = "val1"
"aaa/ddd/222" = "val2"
}
}
data "transform_group_by_value" "data" { input="${local.input}" extract = "val1" }
data "transform_glob_map" "include" { input="${local.input}" pattern="aaa/*/111" }
data "transform_glob_map" "exclude" { input="${local.input}" pattern="aaa/*/111" exclude = true }
data "transform_glob_map" "include_w_sep" { input="${local.input}" pattern="aaa/*" separator="/" }
data "transform_glob_map" "include_wo_sep" { input="${local.input}" pattern="aaa/*" }
output "result" {
value = {
grouped = "${data.transform_group_by_value.data.items}"
glob_include = "${data.transform_glob_map.include.output}"
glob_exclude = "${data.transform_glob_map.exclude.output}"
glob_include_w_sep = "${data.transform_glob_map.include_w_sep.output}"
glob_include_wo_sep = "${data.transform_glob_map.include_wo_sep.output}"
}
}
Download
$ wget "https://github.com/ashald/terraform-provider-transform/releases/download/v1.1.0/terraform-provider-transform_v1.1.0-$(uname -s | tr '[:upper:]' '[:lower:]')-amd64"
$ chmod +x ./terraform-provider-transform*
Init
$ ls -1
main.tf
terraform-provider-transform_v1.1.0-linux-amd64
$ terraform init
Initializing provider plugins...
The following providers do not have any version constraints in configuration,
so the latest version was installed.
To prevent automatic upgrades to new major versions that may contain breaking
changes, it is recommended to add version = "..." constraints to the
corresponding provider blocks in configuration, with the constraint strings
suggested below.
* provider.transform: version = "~> 1.1"
Terraform has been successfully initialized!
You may now begin working with Terraform. Try running "terraform plan" to see
any changes that are required for your infrastructure. All Terraform commands
should now work.
If you ever set or change modules or backend configuration for Terraform,
rerun this command to reinitialize your working directory. If you forget, other
commands will detect it and remind you to do so if necessary.
Apply
$ terraform apply
data.transform_glob_map.include: Refreshing state...
data.transform_glob_map.include_wo_sep: Refreshing state...
data.transform_glob_map.include_w_sep: Refreshing state...
data.transform_glob_map.exclude: Refreshing state...
data.transform_group_by_value.data: Refreshing state...
Apply complete! Resources: 0 added, 0 changed, 0 destroyed.
Outputs:
result = {
glob_exclude = map[aaa/ddd/222:val2]
glob_include = map[aaa/ccc/111:val1 aaa/bbb/111:val1]
glob_include_w_sep = map[]
glob_include_wo_sep = map[aaa/bbb/111:val1 aaa/ddd/222:val2 aaa/ccc/111:val1]
grouped = [aaa/ccc/111 aaa/bbb/111]
}
Development
Go
In order to work on the provider, Go should be installed first (version 1.8+ is required).
goenv and gvm are great utilities that can help a
lot with that and simplify setup tremendously.
GOPATH should be setup correctly and as long as $GOPATH/bin
should be
added $PATH
.
Source Code
Source code can be retrieved either with go get
$ go get -u -d github.com/ashald/terraform-provider-transform
or with git
$ mkdir -p ${GOPATH}/src/github.com/ashald/terraform-provider-transform
$ cd ${GOPATH}/src/github.com/ashald/terraform-provider-transform
$ git clone git@github.com:ashald/terraform-provider-transform.git .
Test
$ make test
go test -v ./...
? github.com/ashald/terraform-provider-transform [no test files]
=== RUN TestGlobMapDataSource
--- PASS: TestGlobMapDataSource (0.09s)
=== RUN TestGroupByValueDataSource
--- PASS: TestGroupByValueDataSource (0.09s)
=== RUN TestProvider
--- PASS: TestProvider (0.00s)
PASS
ok github.com/ashald/terraform-provider-transform/transform (cached)
go vet ./...
Build
In order to build plugin for the current platform use [GNU]make:
$ make build
go build -o terraform-provider-transform_v1.1.0
it will build provider from sources and put it into current working directory.
If Terraform was installed (as a binary) or via go get -u github.com/hashicorp/terraform
it'll pick up the plugin if
executed against a configuration in the same directory.
Release
In order to prepare provider binaries for all platforms:
$ make release
GOOS=darwin GOARCH=amd64 go build -o './release/terraform-provider-transform_v1.1.0-darwin-amd64'
GOOS=linux GOARCH=amd64 go build -o './release/terraform-provider-transform_v1.1.0-linux-amd64'
Versioning
This project follow Semantic Versioning
Changelog
This project follows keep a changelog guidelines for changelog.
Contributors
Please see CONTRIBUTORS.md
License
This is free and unencumbered software released into the public domain. See LICENSE
Documentation ¶
There is no documentation for this package.