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VERSION=v0.0.1

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on:
release:
types: [created]
permissions:
contents: write
packages: write
jobs:
release-linux-amd64:
name: release linux/amd64
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- uses: wangyoucao577/go-release-action@v1
with:
github_token: ${{ secrets.GITHUB_TOKEN }}
goos: linux
goarch: amd64

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.gitignore
# If you prefer the allow list template instead of the deny list, see community template:
# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
#
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Local build
tfvars-atlantis-config
# Test binary, built with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
# Dependency directories (remove the comment below to include it)
# vendor/
# Go workspace file
go.work
# justfile Go tools
tools

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LICENSE Normal file
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the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# tfvars-atlantis-config
<p align="center">
<img src="https://github.com/3bbbeau/tfvars-atlantis-config/assets/72932978/373ea5ca-7c2f-4f52-856d-e4929d424bec" alt="tfvars-atlantis-config logo"/><br><br>
<b>tfvars pre-workflow hook for Atlantis</b>
</p>
## Quick start
### CLI
tfvars-atlantis-config generate --automerge --autoplan --parallel --output=atlantis.yaml
### Atlantis Server Side Config
```yaml
repos:
- id: /.*/
pre_workflow_hooks:
- run: tfvars-atlantis-config generate --automerge --autoplan --parallel --output=atlantis.yaml
```
## What is `tfvars-atlantis-config`?
Heavily inspired by
[terragrunt-atlantis-config](https://github.com/transcend-io/terragrunt-atlantis-config/),
this tool allows you to dynamically generate your
[Atlantis](https://runatlantis.io) configuration using `tfvars` instead
of environment hiearchies.
This is useful for teams that have simple Terraform
components and don't want the added complexity of using Terragrunt or structured
environment levels.
### Example
#### The following repo structure:
```
my-terraform
├── main.tf
├── dev.tfvars
```
#### Generates the following Atlantis configuration:
```yaml
version: 3
automerge: true
parallel_plan: true
parallel_apply: true
projects:
- name: my-terraform-dev
dir: my-terraform
workflow: my-terraform-dev
autoplan:
when_modified:
- '*.tf'
- dev.tfvars
enabled: true
- name: my-terraform-prod
dir: my-terraform
workflow: my-terraform-prod
autoplan:
when_modified:
- '*.tf'
- prod.tfvars
enabled: true
workflows:
my-terraform-dev:
plan:
steps:
- init
- plan:
extra_args:
- -var-file=dev.tfvars
apply:
- apply
my-terraform-prod:
plan:
steps:
- init
- plan:
extra_args:
- -var-file=prod.tfvars
apply:
- apply
```
## Why you should use it?
Dynamically generate your Atlantis configuration based on your Terraform components' `.tfvars` files:
* Auto plan per environment based on the environment `.tfvars` file modified.
* Auto plan all environments when a component's Terraform code is modified (`*.tf`).
* Allow your teams to organize their Terraform components in monorepos/standalone
repositories how _they_ want, while abstracting the configuration of Atlantis
away from them, and reducing bloat in your repos.
## Flags
Customize the behavior of this utility through CLI flag values passed in at
runtime.
| Flag Name | Description | Default Value |
| ----------------------------- | ---------------------------------------------------------------------------------------------------------------- | ------------- |
| `--automerge` | Enable auto merge. | false |
| `--autoplan` | Enable auto plan. | false |
| `--default-terraform-version` | Default terraform version to run for Atlantis. Default is determined by the Terraform version constraints. | "" |
| `--multienv` | Enable injection of environment specific environment variables to each workflow. | false |
| `--output` | Path of the file where configuration will be generated, usually `atlantis.yaml`. Default is to write to `stdout` | `stdout` |
| `--parallel` | Enables plans and applys to happen in parallel. | false |
| `--root` | Path to the root directory of the git repo you want to build config for. Default is current dir. | `.` |
| `--use-workspaces` | Whether to use Terraform workspaces for projects. | false |

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package cmd
import (
"context"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/3bbbeau/tfvars-atlantis-config/logger"
"github.com/3bbbeau/tfvars-atlantis-config/repocfg"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"gopkg.in/yaml.v2"
)
// Flags represents the flags for the `generate` command
type Flags struct {
AutoMerge bool
AutoPlan bool
DefaultTerraformVersion string
MultiEnv bool
Output string
Parallel bool
Root string
UseWorkspaces bool
}
// NewFlags returns a default Flags struct
func NewFlags() (*Flags, error) {
pwd, err := os.Getwd()
if err != nil {
return nil, fmt.Errorf("default flags for git root: %w", err)
}
return &Flags{
AutoMerge: false,
AutoPlan: false,
DefaultTerraformVersion: "",
Root: pwd,
MultiEnv: false,
Output: "",
Parallel: false,
UseWorkspaces: false,
}, nil
}
// AddFlags registers flags for the `generate` command
func (flags *Flags) AddFlags(cmd *cobra.Command) {
cmd.Flags().BoolVar(&flags.AutoPlan, "autoplan", flags.AutoPlan, "Enable auto plan. Default is disabled")
cmd.Flags().BoolVar(&flags.AutoMerge, "automerge", flags.AutoMerge, "Enable auto merge. Default is disabled")
cmd.Flags().BoolVar(&flags.Parallel, "parallel", flags.Parallel, "Enables plans and applys to happen in parallel. Default is disabled")
cmd.Flags().StringVar(&flags.Output, "output", flags.Output, "Path of the file where configuration will be generated. Default is stdout")
cmd.Flags().StringVar(&flags.Root, "root", flags.Root, "Path to the root directory of the git repo you want to build config for. Default is current dir")
cmd.Flags().BoolVar(&flags.MultiEnv, "multienv", flags.MultiEnv, "Enable injection of environment specific environment variables to each workflow. Default is disabled")
cmd.Flags().StringVar(&flags.DefaultTerraformVersion, "terraform-version", flags.DefaultTerraformVersion, "Default terraform version to run for Atlantis. Default is determined by the Terraform version constraints.")
cmd.Flags().BoolVar(&flags.UseWorkspaces, "use-workspaces", flags.UseWorkspaces, "Use workspaces for projects. Default is disabled")
cmd.Flags().VisitAll(func(f *pflag.Flag) {
logger.FromContext(cmd.Context()).Sugar().Debugf("Set flag: %s = %v", f.Name, f.Value)
})
}
// toOptions converts the flags provided for usage to Options within the repocfg package
func (flags *Flags) toOptions() repocfg.Options {
return repocfg.Options{
Automerge: flags.AutoMerge,
Autoplan: flags.AutoPlan,
DefaultTerraformVersion: flags.DefaultTerraformVersion,
MultiEnv: flags.MultiEnv,
Parallel: flags.Parallel,
UseWorkspaces: flags.UseWorkspaces,
}
}
// NewGenerateCmd creates a new `generate` command, while applying all flags
// with their defaults overlayed by the flags passed in by the caller.
func NewGenerateCmd() (*cobra.Command, error) {
flags, err := NewFlags()
if err != nil {
return nil, fmt.Errorf("new flags: %w", err)
}
cmd := &cobra.Command{
Use: "generate",
Short: "Makes Atlantis config for tfvar backed Terraform projects",
Long: "Logs Yaml representing Atlantis config to stderr",
RunE: func(cmd *cobra.Command, args []string) error {
err := generate(cmd, flags)
if err != nil {
return err
}
return nil
},
}
flags.AddFlags(cmd)
return cmd, nil
}
// generate is used to generate an Atlantis config, called from the `generate`
// command, creating an Atlantis configuration written to flags.OutputPath
func generate(cmd *cobra.Command, flags *Flags) error {
logger := logger.FromContext(cmd.Context())
tree, err := discover(cmd.Context(), flags)
if err != nil {
return err
}
opts := flags.toOptions()
cfg, err := repocfg.NewRepoCfg(tree, opts)
if err != nil {
return err
}
cfgBytes, err := yaml.Marshal(&cfg)
if err != nil {
return fmt.Errorf("repocfg: %w", err)
}
switch flags.Output {
case "":
fmt.Println(string(cfgBytes))
default:
logger.Sugar().Debugf("writing config to %s", flags.Output)
err := os.WriteFile(flags.Output, cfgBytes, 0o644)
if err != nil {
return err
}
}
return nil
}
const (
TF_EXT = ".tf"
TFVARS_EXT = ".tfvars"
TFVARS_JSON_EXT = ".tfvars.json"
)
// discover walks the directory tree and creates a slice of Terraform components
// and their dependencies based on the .tfvars files in the directory and
// subdirectories.
//
// However, if nested directories contain a .tf file, the .tfvars files in the
// subdirectories are ignored, as they are assumed to be part of a different
// parent node (Terraform component).
//
// For example, if the function is invoked at the path defined by the `root` flag:
//
// .
// ├── components
// │ ├── component1
// │ │ ├── main.tf
// │ │ └── dev.tfvars
// │ └── component2
// │ ├── extraVars
// │ │ └── stg.tfvars
// │ ├── main.tf
// │ └── dev.tfvars
//
// Then, the resulting slice of components would look like:
//
// Path: "components/component1"
// VarFiles: "components/component1/dev.tfvars"
//
// Path: "components/component2"
// VarFiles: []string{"components/component2/dev.tfvars", "components/component2/extraVars/stg.tfvars"}
func discover(ctx context.Context, flags *Flags) ([]repocfg.Component, error) {
logger := logger.FromContext(ctx)
var discovered []repocfg.Component
// Walk the directory tree from the root
err := filepath.Walk(flags.Root, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
// Each parent should be a path containing a Terraform component
if !info.IsDir() && strings.HasSuffix(info.Name(), TF_EXT) {
logger.Debug(fmt.Sprintf("found .tf file: %s", path))
// Add the directory of the Terraform component as the parent
parent, err := filepath.Rel(flags.Root, filepath.Dir(path))
if err != nil {
return err
}
// Each edge should be a path containing Terraform variables files
// relative to the Terraform component
err = filepath.Walk(filepath.Dir(path), func(subpath string, subinfo os.FileInfo, suberr error) error {
if suberr != nil {
return suberr
}
// Filter out Terraform variable files
if !subinfo.IsDir() && (strings.HasSuffix(subinfo.Name(), TFVARS_EXT) || strings.HasSuffix(subinfo.Name(), TFVARS_JSON_EXT)) {
// Ignore nested Terraform variable files that might belong to nested components
if filepath.Dir(subpath) != filepath.Dir(path) && tfExistsInDir(filepath.Dir(subpath)) {
logger.Sugar().Debugf(`ignoring nested %s: %s
which belongs to the component at: %s
not: %s`, filepath.Ext(subpath), subpath, filepath.Dir(subpath), filepath.Dir(path),
)
return filepath.SkipDir
}
logger.Sugar().Debugf("component parent is %s", parent)
found := repocfg.Component{
Path: parent,
}
logger.Sugar().Debugf("found %s file: %s", filepath.Ext(subpath), subpath)
child, err := filepath.Rel(flags.Root, subpath)
if err != nil {
return err
}
// VarFile is a member of this component
logger.Sugar().Debugf("component %s has var file %s", parent, child)
found.VarFiles = append(found.VarFiles, child)
discovered = append(discovered, found)
}
return err
})
return filepath.SkipDir
}
return nil
})
if err != nil {
return nil, err
}
return discovered, nil
}
// tfExistsInDir returns true if a directory contains a Terraform file
func tfExistsInDir(dir string) bool {
files, err := filepath.Glob(filepath.Join(dir, "*"+TF_EXT))
if err != nil {
return false
}
return len(files) > 0
}

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cmd/root.go Normal file
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package cmd
import (
"fmt"
"github.com/3bbbeau/tfvars-atlantis-config/logger"
"github.com/spf13/cobra"
"go.uber.org/zap"
)
// New returns the new root command for this utility.
//
// It initializes the root command and adds all subcommands.
func New() (*cobra.Command, error) {
cmd := &cobra.Command{
Use: "tfvars-atlantis-config",
Short: "Generates Atlantis Config for Terraform projects",
Long: `tfvars-atlantis-config is a utility that generates Atlantis configurations for Terraform projects
that use tfvars files per environment.`,
PersistentPreRun: func(cmd *cobra.Command, args []string) {
setLogger(cmd)
},
Run: func(cmd *cobra.Command, args []string) {
err := cmd.Help()
if err != nil {
logger.FromContext(cmd.Context()).Error("help cmd", zap.Error(err))
}
},
}
cmd.PersistentFlags().Bool("debug", false, "Enable debug mode")
cmd.AddCommand(NewVersionCmd())
gCmd, err := NewGenerateCmd()
if err != nil {
return nil, fmt.Errorf("creating generate command: %w", err)
}
cmd.AddCommand(gCmd)
return cmd, nil
}
// setLogger sets the logger for the command's lifespan, based on the debug flag.
func setLogger(cmd *cobra.Command) {
ctx := cmd.Context()
debug, err := cmd.Flags().GetBool("debug")
if err != nil || !debug {
z := zap.Must(zap.NewProductionConfig().Build())
ctx = logger.WithContext(ctx, z)
} else {
z := zap.Must(zap.NewDevelopmentConfig().Build())
ctx = logger.WithContext(ctx, z)
}
cmd.SetContext(ctx)
}

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cmd/version.go Normal file
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package cmd
import (
"github.com/spf13/cobra"
)
// Build-time version string, overriden by ldflags.
var v string = "devel"
// NewVersionCmd returns the command for retrieving the version of this utility.
func NewVersionCmd() *cobra.Command {
cmd := &cobra.Command{
Use: "version",
Short: "Version of terragrunt-atlantis-config",
Long: "Version of terragrunt-atlantis-config",
Run: func(cmd *cobra.Command, args []string) {
cmd.Println(v)
},
}
return cmd
}

24
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@ -0,0 +1,24 @@
package cmd
import (
"bytes"
"testing"
)
// Tests the NewVersionCmd function returns the version of the utility.
func Test_NewVersionCmd(t *testing.T) {
t.Parallel()
got := new(bytes.Buffer)
cmd, _ := New()
cmd.SetArgs([]string{"version"})
cmd.SetOutput(got)
cmd.Execute() // nolint:errcheck
want := "devel\n"
if got.String() != want {
t.Errorf(`NewVersionCmd()
got %s
want %v`, got.String(), want)
}
}

23
go.mod Normal file
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@ -0,0 +1,23 @@
module github.com/3bbbeau/tfvars-atlantis-config
go 1.22.0
require (
github.com/google/go-cmp v0.6.0
github.com/hashicorp/go-version v1.6.0
github.com/runatlantis/atlantis v0.27.1
github.com/spf13/cobra v1.8.0
github.com/spf13/pflag v1.0.5
go.uber.org/zap v1.26.0
gopkg.in/yaml.v2 v2.4.0
)
require (
github.com/agext/levenshtein v1.2.3 // indirect
github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
github.com/go-ozzo/ozzo-validation v3.6.0+incompatible // indirect
github.com/inconshreveable/mousetrap v1.1.0 // indirect
github.com/pkg/errors v0.9.1 // indirect
github.com/rogpeppe/go-internal v1.10.0 // indirect
go.uber.org/multierr v1.11.0 // indirect
)

52
go.sum Normal file
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@ -0,0 +1,52 @@
github.com/agext/levenshtein v1.2.3 h1:YB2fHEn0UJagG8T1rrWknE3ZQzWM06O8AMAatNn7lmo=
github.com/agext/levenshtein v1.2.3/go.mod h1:JEDfjyjHDjOF/1e4FlBE/PkbqA9OfWu2ki2W0IB5558=
github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3dyBCFEj5IhUbnKptjxatkF07cF2ak3yi77so=
github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/go-ozzo/ozzo-validation v3.6.0+incompatible h1:msy24VGS42fKO9K1vLz82/GeYW1cILu7Nuuj1N3BBkE=
github.com/go-ozzo/ozzo-validation v3.6.0+incompatible/go.mod h1:gsEKFIVnabGBt6mXmxK0MoFy+cZoTJY6mu5Ll3LVLBU=
github.com/go-test/deep v1.1.0 h1:WOcxcdHcvdgThNXjw0t76K42FXTU7HpNQWHpA2HHNlg=
github.com/go-test/deep v1.1.0/go.mod h1:5C2ZWiW0ErCdrYzpqxLbTX7MG14M9iiw8DgHncVwcsE=
github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
github.com/hashicorp/go-version v1.6.0 h1:feTTfFNnjP967rlCxM/I9g701jU+RN74YKx2mOkIeek=
github.com/hashicorp/go-version v1.6.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 h1:RWengNIwukTxcDr9M+97sNutRR1RKhG96O6jWumTTnw=
github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826/go.mod h1:TaXosZuwdSHYgviHp1DAtfrULt5eUgsSMsZf+YrPgl8=
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
github.com/runatlantis/atlantis v0.27.1 h1:J1bwKImaLQBTEW6Zz56rRAVZeHvideSRIfHzhj18H7w=
github.com/runatlantis/atlantis v0.27.1/go.mod h1:HoRKWHy/FtxoAJ7ixtJjLLAe/tYnw5Iy/dGfgftPB5w=
github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
github.com/spf13/cobra v1.8.0 h1:7aJaZx1B85qltLMc546zn58BxxfZdR/W22ej9CFoEf0=
github.com/spf13/cobra v1.8.0/go.mod h1:WXLWApfZ71AjXPya3WOlMsY9yMs7YeiHhFVlvLyhcho=
github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
go.uber.org/goleak v1.2.0 h1:xqgm/S+aQvhWFTtR0XK3Jvg7z8kGV8P4X14IzwN3Eqk=
go.uber.org/goleak v1.2.0/go.mod h1:XJYK+MuIchqpmGmUSAzotztawfKvYLUIgg7guXrwVUo=
go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
go.uber.org/zap v1.26.0 h1:sI7k6L95XOKS281NhVKOFCUNIvv9e0w4BF8N3u+tCRo=
go.uber.org/zap v1.26.0/go.mod h1:dtElttAiwGvoJ/vj4IwHBS/gXsEu/pZ50mUIRWuG0so=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

17
justfile Normal file
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set dotenv-load := true
tool-golangci:
@hash golangci-lint > /dev/null 2>&1; if [ $? -ne 0 ]; then \
GOBIN="$(pwd)/tools/bin" go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest; \
fi
lint: tool-golangci
@$(pwd)/tools/bin/golangci-lint run -E gofumpt --timeout 1m
build:
@go build -ldflags="-X 'github.com/3bbbeau/tfvars-atlantis-config/cmd.v=${VERSION}'"
test:
@go test -cover ./...
@go clean --testcache
@go test ./... -v

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logger/logger.go Normal file
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package logger
import (
"context"
"go.uber.org/zap"
)
type loggerKey struct{}
// WithContext returns a new context with the logger added.
func WithContext(ctx context.Context, l *zap.Logger) context.Context {
return context.WithValue(ctx, loggerKey{}, l)
}
// FromContext returns the logger in the context if it exists, otherwise a new
// no-op logger is returned .
func FromContext(ctx context.Context) *zap.Logger {
if ctx == nil {
return zap.NewNop()
}
v := ctx.Value(loggerKey{})
if v == nil {
return zap.NewNop()
}
return v.(*zap.Logger)
}

19
main.go Normal file
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package main
import (
"os"
"github.com/3bbbeau/tfvars-atlantis-config/cmd"
)
func main() {
cmd, err := cmd.New()
if err != nil {
os.Exit(1)
}
err = cmd.Execute()
if err != nil {
os.Exit(1)
}
}

105
repocfg/project.go Normal file
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package repocfg
import (
"fmt"
"path/filepath"
"github.com/hashicorp/go-version"
"github.com/runatlantis/atlantis/server/core/config/raw"
)
// ExtRawProject extends the raw.Project type to add additional methods
type ExtRawProject struct {
raw.Project
}
// ErrProjectFrom represents an error when creating an Atlantis project from a
// Terraform component along with some useful contextual information.
type ErrNewProject struct {
Err error
Component Component
Project *ExtRawProject
}
// Stringer implementation for ErrProjectFrom
func (e ErrNewProject) Error() string {
return fmt.Sprintf(`failed to create project:
component: %+v,
project: %+v,
error: %s`, e.Component, e.Project, e.Err)
}
// ProjectsFrom creates an Atlantis project from a Terraform component and
// its associated Terraform variable files.
func ProjectsFrom(c Component, opts Options) ([]ExtRawProject, error) {
var projects []ExtRawProject
for _, v := range c.VarFiles {
p := ExtRawProject{
Project: raw.Project{
Name: ptr(friendlyName(c.Path, v)),
// The directory of this project relative to the repo root.
Dir: ptr(c.Path),
Workflow: ptr(friendlyName(c.Path, v)),
},
}
if opts.UseWorkspaces {
// Terraform workspaces are represented by the Terraform variable file
// names.
//
// Example:
//
// dev.tfvars -> dev
// stg.tfvars.json -> stg
p.Workspace = ptr(pathWithoutExtension(v))
}
// Generate a default Terraform version for the project if enabled
if opts.DefaultTerraformVersion != "" {
p.DefaultTerraformVersion(opts.DefaultTerraformVersion)
}
// Generate autoplan configuration for the project if enabled
if opts.Autoplan {
p.AutoPlan(v)
}
// We can validate the project using the Atlantis validate method
err := p.Validate()
if err != nil {
return nil, fmt.Errorf("failed to validate project: %w", err)
}
projects = append(projects, p)
}
return projects, nil
}
// AutoPlan sets the autoplan configuration for the project
//
// This will trigger a plan when the Terraform files or the variable files
// are modified.
func (p *ExtRawProject) AutoPlan(v string) {
autoplan := &raw.Autoplan{
Enabled: ptr(true),
// Paths are relative to the project directory
WhenModified: []string{
"*.tf",
filepath.Base(v),
},
}
p.Autoplan = autoplan
}
// DefaultTerraformVersion sets the default Terraform version for the project
// if the version is valid.
func (p *ExtRawProject) DefaultTerraformVersion(v string) {
ver, err := version.NewSemver(v)
if err != nil {
p.TerraformVersion = new(string)
} else {
p.TerraformVersion = ptr(ver.String())
}
}

118
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package repocfg
import (
"testing"
"github.com/google/go-cmp/cmp"
"github.com/runatlantis/atlantis/server/core/config/raw"
)
// Tests the ProjectFrom method for a project
func Test_ProjectsFrom(t *testing.T) {
t.Parallel()
tests := []struct {
component Component
options Options
want []ExtRawProject
}{
{
component: Component{
Path: "test",
VarFiles: []string{"env.tfvars"},
},
options: Options{
Autoplan: true,
DefaultTerraformVersion: "8.8.8",
Parallel: true,
UseWorkspaces: true,
},
want: []ExtRawProject{
{
Project: raw.Project{
Name: ptr("test-env"),
Dir: ptr("test"),
Workflow: ptr("test-env"),
Workspace: ptr("env"),
TerraformVersion: ptr("8.8.8"),
Autoplan: &raw.Autoplan{
Enabled: ptr(true),
WhenModified: []string{
"*.tf",
"env.tfvars",
},
},
},
},
},
},
}
for _, tc := range tests {
got, err := ProjectsFrom(tc.component, tc.options)
if err != nil {
t.Errorf("ProjectFrom() error: %s", err)
}
if !cmp.Equal(got, tc.want) {
t.Errorf(`ProjectFrom()
diff %s`, cmp.Diff(got, tc.want))
}
}
}
// Tests the AutoPlan method for a project
func Test_AutoPlan(t *testing.T) {
t.Parallel()
want := &raw.Autoplan{
Enabled: ptr(true),
WhenModified: []string{
"*.tf",
"env.tfvars",
},
}
got := new(ExtRawProject)
got.AutoPlan("env.tfvars")
if !cmp.Equal(got.Autoplan, want) {
t.Errorf(`AutoPlan()
diff %s`, cmp.Diff(got, want))
}
}
// Tests the DefaultTerraformVersion method for a project
func Test_DefaultTerraformVersion(t *testing.T) {
t.Parallel()
tests := []struct {
version string
want raw.Project
}{
{
version: "8.8.8",
want: raw.Project{
TerraformVersion: ptr("8.8.8"),
},
},
{
version: "invalid",
want: raw.Project{
TerraformVersion: new(string),
},
},
}
for _, tc := range tests {
new := new(ExtRawProject)
new.DefaultTerraformVersion(tc.version)
got := new.Project.TerraformVersion
if !cmp.Equal(got, tc.want.TerraformVersion) {
t.Errorf(`DefaultTerraformVersion()
diff %s`, cmp.Diff(got, tc.want))
}
}
}

99
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package repocfg
import (
"fmt"
"github.com/runatlantis/atlantis/server/core/config/raw"
"gopkg.in/yaml.v2"
)
var ErrNoExistingConfig = fmt.Errorf("no existing config found")
// Options represents the top-level configuration for a new Atlantis RepoCfg
type Options struct {
Automerge bool
Autoplan bool
DefaultTerraformVersion string
Parallel bool
MultiEnv bool
UseWorkspaces bool
}
// Component represents a Terraform component and its associated Terraform variable files
type Component struct {
Path string
VarFiles []string
}
// ExtRawRepoCfg is an embedded type for a raw.RepoCfg
type ExtRawRepoCfg struct {
raw.RepoCfg `yaml:",inline"`
}
// NewRepoCfg returns a new Atlantis RepoCfg from a slice of components
// and options.
//
// Reference: https://www.runatlantis.io/docs/repo-level-atlantis-yaml.html
func NewRepoCfg(components []Component, opts Options) (*ExtRawRepoCfg, error) {
repoCfg := &ExtRawRepoCfg{
RepoCfg: raw.RepoCfg{
Version: ptr(3),
Automerge: &opts.Automerge,
ParallelPlan: &opts.Parallel,
ParallelApply: &opts.Parallel,
},
}
var projects []raw.Project
for _, c := range components {
generated, err := ProjectsFrom(c, opts)
if err != nil {
return nil, fmt.Errorf("failed while creating projects with component %+v: %w", c, err)
}
for _, p := range generated {
projects = append(projects, p.Project)
}
}
repoCfg.Projects = append(repoCfg.Projects, projects...)
workflows := map[string]raw.Workflow{}
for _, c := range components {
generated, err := WorkflowsFrom(c, opts)
if err != nil {
return nil, fmt.Errorf("failed while creating workflows with component %+v: %w", c, err)
}
for _, wf := range generated {
workflows[wf.Name] = wf.Workflow
}
}
repoCfg.Workflows = workflows
return repoCfg, nil
}
func (rc *ExtRawRepoCfg) MarshalYAML() (interface{}, error) {
m := yaml.MapSlice{
{Key: "version", Value: rc.Version},
{Key: "automerge", Value: rc.Automerge},
{Key: "parallel_plan", Value: rc.ParallelPlan},
{Key: "parallel_apply", Value: rc.ParallelApply},
{Key: "projects", Value: rc.Projects},
}
workflows := yaml.MapSlice{}
for name, wf := range rc.Workflows {
workflows = append(workflows, yaml.MapItem{
Key: name,
Value: yaml.MapSlice{
{Key: "plan", Value: wf.Plan},
{Key: "apply", Value: wf.Apply},
},
})
}
m = append(m, yaml.MapItem{Key: "workflows", Value: workflows})
return m, nil
}

100
repocfg/repocfg_test.go Normal file
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package repocfg
import (
"testing"
"github.com/google/go-cmp/cmp"
"github.com/runatlantis/atlantis/server/core/config/raw"
)
func Test_NewFrom(t *testing.T) {
t.Parallel()
tests := []struct {
name string
components []Component
want *ExtRawRepoCfg
}{
{
name: "WithNestedVars",
components: []Component{
{
Path: "test",
VarFiles: []string{"test/vars/dev.tfvars", "test/vars/nested/stg.tfvars"},
},
},
want: &ExtRawRepoCfg{
RepoCfg: raw.RepoCfg{
Version: ptr(3),
Automerge: ptr(false),
ParallelPlan: ptr(false),
ParallelApply: ptr(false),
Workflows: map[string]raw.Workflow{
"test-dev": {
Plan: &raw.Stage{
Steps: []raw.Step{
{
Key: ptr("init"),
},
{
Map: map[string]map[string][]string{
"plan": {"extra_args": []string{"-var-file=vars/dev.tfvars"}},
},
},
},
},
Apply: &raw.Stage{
Steps: []raw.Step{
{
Key: ptr("apply"),
},
},
},
},
"test-stg": {
Plan: &raw.Stage{
Steps: []raw.Step{
{
Key: ptr("init"),
},
{
Map: map[string]map[string][]string{
"plan": {"extra_args": []string{"-var-file=vars/nested/stg.tfvars"}},
},
},
},
},
Apply: &raw.Stage{
Steps: []raw.Step{
{
Key: ptr("apply"),
},
},
},
},
},
Projects: []raw.Project{
{
Name: ptr("test-dev"),
Dir: ptr("test"),
Workflow: ptr("test-dev"),
},
{
Name: ptr("test-stg"),
Dir: ptr("test"),
Workflow: ptr("test-stg"),
},
},
},
},
},
}
for _, tc := range tests {
got, _ := NewRepoCfg(tc.components, Options{})
if !cmp.Equal(got, tc.want) {
t.Errorf(`NewFrom()
diff %s`, cmp.Diff(got, tc.want))
}
}
}

68
repocfg/util.go Normal file
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package repocfg
import (
"fmt"
"os"
"path/filepath"
"strings"
)
// Ptr returns a pointer to type T
func ptr[T any](v T) *T { return &v }
// friendlyName creates a contextual name used for Atlantis projects and workflows
func friendlyName(path, environment string) string {
name := []string{strings.ReplaceAll(path, "/", "-"), pathWithoutExtension(filepath.Base(environment))}
return strings.TrimSuffix(strings.Join(name, "-"), "-")
}
// pathWithoutExtension removes the file extension from a base path.
// if the path has no extension ("."), it returns an empty string.
func pathWithoutExtension(path string) string {
return strings.TrimSuffix(strings.TrimSuffix(filepath.Base(path), filepath.Ext(path)), filepath.Base(path))
}
var ErrNoEnvVars error = fmt.Errorf("no matching prefixed environment variables found")
// Generates the Atlantis multienv string within stages for multi-environment
// Terraform projects, e.g:
//
// EnvVar1Name=value1,EnvVar2Name=value2,EnvVar3Name=value3
//
// Given a prefix for the environment name of the workflow, strips the
// environment name from existing environment vars while keeping their value.
//
// This is useful when you want to configure providers via environment variables
// on a per-environment basis.
//
// Example:
//
// DEV_AWS_ACCESS_KEY_ID="foo"
// DEV_AWS_SECRET_ACCESS_KEY="bar"
// ->
// AWS_ACCESS_KEY_ID=$DEV_AWS_ACCESS_KEY_ID
// AWS_SECRET_ACCESS_KEY=$DEV_AWS_SECRET_ACCESS_KEY
func prefixedEnviron(prefix string) (*string, error) {
prefix = strings.ToUpper(prefix)
if !strings.HasSuffix(prefix, "_") {
prefix += "_"
}
strippedEnviron := []string{}
for _, v := range os.Environ() {
if strings.HasPrefix(v, prefix) {
// Limits the split to only two parts, separating the key from the first
// occurrence of '=', otherwise if the value contains '=' character(s) the
// string would be split into more than two parts.
name := strings.SplitN(v, "=", 2)[0]
// Strips the prefix from the environment variable name, e.g. "DEV_" from
// "DEV_AWS_ACCESS_KEY_ID" and let it equal to the original environment variable
strippedEnviron = append(strippedEnviron, fmt.Sprintf("%s=$%s", strings.TrimPrefix(name, prefix), name))
}
}
if len(strippedEnviron) == 0 {
return nil, ErrNoEnvVars
}
return ptr(fmt.Sprintf("echo %s", strings.Join(strippedEnviron, ","))), nil
}

73
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package repocfg
import (
"testing"
"github.com/google/go-cmp/cmp"
)
// Tests the ptr helper function. Given a generic value it should return a
// pointer to that value.
func Test_Ptr(t *testing.T) {
t.Parallel()
intV := 3
strV := "test"
boolV := true
for _, T := range []any{intV, strV, boolV} {
got := ptr(T)
if *got != T {
t.Errorf(`ptr()
got %v
want %v
diff %s`, got, T, cmp.Diff(got, T))
}
}
}
// Tests the friendlyName helper function. Given a path and an environment it
// should provide a contextual name to be used for Atlantis projects and workflows.
func Test_FriendlyName(t *testing.T) {
t.Parallel()
path := "my/path/to/some/terraform/component"
environment := "my/path/to/some/terraform/component/dev.tfvars"
want := "my-path-to-some-terraform-component-dev"
got := friendlyName(path, environment)
if got != want {
t.Errorf(`friendlyName()
got %v
want %v
diff %s`, got, want, cmp.Diff(got, want))
}
}
func Test_PathWithoutExtension(t *testing.T) {
t.Parallel()
tests := []struct {
path string
want string
}{
{
path: "dev.tfvars",
want: "dev",
},
{
path: "dev",
want: "",
},
}
for _, tc := range tests {
got := pathWithoutExtension(tc.path)
if got != tc.want {
t.Errorf(`pathWithoutExtension()
got %v
want %v
diff %s`, got, tc.want, cmp.Diff(got, tc.want))
}
}
}

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package repocfg
import (
"errors"
"fmt"
"path/filepath"
"github.com/runatlantis/atlantis/server/core/config/raw"
)
// ExtRawWorkflow extends the raw.Workflow type to add additional methods
// and fields
type ExtRawWorkflow struct {
Name string
Args *ExtraArgs
Workspace string
raw.Workflow
}
// ExtraArgs is a type aliased map of extra arguments to be passed within a workflow
type ExtraArgs map[string][]string
// hasArgs returns true if the component has a target (i.e. a Terraform variable file)
func hasArgs(c Component) bool {
return len(c.VarFiles) > 0
}
// Add generates the extra_args for the stage and adds them to the stage's Args
func (args *ExtraArgs) Add(v []string) {
(*args)["extra_args"] = v
}
// relativeVarFile returns the path of the variable file v relative to
// the component's path.
func relativeVarFile(c, v string) (*string, error) {
absComponent, err := filepath.Abs(c)
if err != nil {
return nil, fmt.Errorf("absolute path for component %s: %s", c, err)
}
absVarFile, err := filepath.Abs(v)
if err != nil {
return nil, fmt.Errorf("absolute path for %s: %s", v, err)
}
rel, err := filepath.Rel(absComponent, absVarFile)
if err != nil {
return nil, fmt.Errorf("relative path for %s: %s", v, err)
}
return &rel, nil
}
// WorkflowsFrom creates new Atlantis workflows from a Terraform component
// and calls the stage methods to generate all of its fields.
func WorkflowsFrom(c Component, opts Options) ([]ExtRawWorkflow, error) {
var workflows []ExtRawWorkflow
for _, v := range c.VarFiles {
wf := ExtRawWorkflow{
Name: friendlyName(c.Path, v),
Workflow: raw.Workflow{
Plan: &raw.Stage{},
Apply: &raw.Stage{},
},
Args: &ExtraArgs{},
Workspace: pathWithoutExtension(v),
}
if hasArgs(c) {
rel, err := relativeVarFile(c.Path, v)
if err != nil {
return nil, fmt.Errorf("relative variable file for %s: %s", v, err)
}
wf.Args.Add([]string{"-var-file=" + *rel})
}
if opts.MultiEnv {
err := wf.AddMultiEnv(v)
if err != nil {
return nil, fmt.Errorf("adding multienv for %s: %s", v, err)
}
}
if opts.UseWorkspaces {
wf.AddWorkspace()
}
wf.PlanStage(opts)
wf.ApplyStage(opts)
err := wf.Validate()
if err != nil {
return nil, fmt.Errorf("workflow validation failed for %s: %s", wf.Name, err)
}
workflows = append(workflows, wf)
}
return workflows, nil
}
// PlanStage generates the plan stage for the workflow
func (wf *ExtRawWorkflow) PlanStage(opts Options) {
if wf.Plan == nil {
wf.Plan = new(raw.Stage)
}
init := raw.Step{
Key: ptr("init"),
}
wf.Plan.Steps = append(wf.Plan.Steps, init)
if len(*wf.Args) > 0 {
wf.Plan.Steps = append(wf.Plan.Steps, raw.Step{
Map: map[string]map[string][]string{
"plan": *wf.Args,
},
})
} else {
wf.Plan.Steps = append(wf.Plan.Steps, raw.Step{
Key: ptr("plan"),
})
}
}
// ApplyStage generates the apply stage for the workflow
//
// Unlike the plan stage, the apply stage doesn't need extra args for -var-file,
// as it uses the planfile generated by the plan stage.
func (wf *ExtRawWorkflow) ApplyStage(opts Options) {
if wf.Apply == nil {
wf.Apply = new(raw.Stage)
}
wf.Apply.Steps = append(wf.Apply.Steps, raw.Step{
Key: ptr("apply"),
})
}
// AddWorkspace sets TF_WORKSPACE in the plan and apply stages
// to the value of the workspace from the project configuration.
//
// This is needed because Atlantis will use the default workspace
// which doesn't exist.
func (wf *ExtRawWorkflow) AddWorkspace() {
for _, stg := range []*raw.Stage{wf.Plan, wf.Apply} {
stg.Steps = append(stg.Steps, raw.Step{
EnvOrRun: map[string]map[string]string{
"env": {
"name": "TF_WORKSPACE",
"value": wf.Workspace,
},
},
})
}
}
// AddMultiEnv adds the multienv step to the plan and apply stages
func (wf *ExtRawWorkflow) AddMultiEnv(env string) error {
environ, err := prefixedEnviron(pathWithoutExtension(env))
if errors.Is(err, ErrNoEnvVars) {
return nil
}
if err != nil {
return fmt.Errorf("adding multienv for environment %s: %w", env, err)
}
for _, stg := range []*raw.Stage{wf.Plan, wf.Apply} {
stg.Steps = append(stg.Steps, raw.Step{
StringVal: map[string]string{
"multienv": *environ,
},
})
}
return nil
}

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repocfg/workflow_test.go Normal file
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package repocfg
import (
"testing"
"github.com/google/go-cmp/cmp"
"github.com/runatlantis/atlantis/server/core/config/raw"
)
// Tests creating a new workflow from a Terraform component
func Test_WorkflowsFrom(t *testing.T) {
t.Parallel()
tests := []struct {
name string
component Component
want []ExtRawWorkflow
}{
{
name: "new-workflow",
component: Component{
Path: "test",
VarFiles: []string{"test/vars/dev.tfvars", "test/vars/stg.tfvars"},
},
want: []ExtRawWorkflow{
{
Name: "test-dev",
Args: &ExtraArgs{
"extra_args": []string{"-var-file=vars/dev.tfvars"},
},
Workspace: "dev",
Workflow: raw.Workflow{
Plan: &raw.Stage{
Steps: []raw.Step{
{
Key: ptr("init"),
},
{
Map: map[string]map[string][]string{
"plan": {"extra_args": []string{"-var-file=vars/dev.tfvars"}},
},
},
},
},
Apply: &raw.Stage{
Steps: []raw.Step{
{
Key: ptr("apply"),
},
},
},
},
},
{
Name: "test-stg",
Args: &ExtraArgs{
"extra_args": []string{"-var-file=vars/stg.tfvars"},
},
Workspace: "stg",
Workflow: raw.Workflow{
Plan: &raw.Stage{
Steps: []raw.Step{
{
Key: ptr("init"),
},
{
Map: map[string]map[string][]string{
"plan": {"extra_args": []string{"-var-file=vars/stg.tfvars"}},
},
},
},
},
Apply: &raw.Stage{
Steps: []raw.Step{
{
Key: ptr("apply"),
},
},
},
},
},
},
},
}
for _, tc := range tests {
got, err := WorkflowsFrom(tc.component, Options{})
if err != nil {
t.Errorf("WorkflowsFrom(): %s", err)
}
if !cmp.Equal(got, tc.want) {
t.Errorf(`WorkflowFrom()
diff %s`, cmp.Diff(got, tc.want))
}
}
}