Files
coder/provisioner/terraform/parse.go
T
Kyle Carberry b3c5bb3576 feat: Compute project build parameters (#82)
* feat: Add parameter and jobs database schema

This modifies a prior migration which is typically forbidden,
but because we're pre-production deployment I felt grouping
would be helpful to future contributors.

This adds database functions that are required for the provisioner
daemon and job queue logic.

* feat: Compute project build parameters

Adds a projectparameter package to compute build-time project
values for a provided scope.

This package will be used to return which variables are being
used for a build, and can visually indicate the hierarchy to
a user.

* Fix terraform provisioner

* Improve naming, abstract inject to consume scope

* Run CI on all branches
2022-01-29 17:45:42 -06:00

74 lines
2.3 KiB
Go

package terraform
import (
"context"
"encoding/json"
"os"
"github.com/hashicorp/terraform-config-inspect/tfconfig"
"golang.org/x/xerrors"
"github.com/coder/coder/provisionersdk/proto"
)
// Parse extracts Terraform variables from source-code.
func (*terraform) Parse(_ context.Context, request *proto.Parse_Request) (*proto.Parse_Response, error) {
module, diags := tfconfig.LoadModule(request.Directory)
if diags.HasErrors() {
return nil, xerrors.Errorf("load module: %w", diags.Err())
}
parameters := make([]*proto.ParameterSchema, 0, len(module.Variables))
for _, v := range module.Variables {
schema, err := convertVariableToParameter(v)
if err != nil {
return nil, xerrors.Errorf("convert variable %q: %w", v.Name, err)
}
parameters = append(parameters, schema)
}
return &proto.Parse_Response{
ParameterSchemas: parameters,
}, nil
}
// Converts a Terraform variable to a provisioner parameter.
func convertVariableToParameter(variable *tfconfig.Variable) (*proto.ParameterSchema, error) {
schema := &proto.ParameterSchema{
Name: variable.Name,
Description: variable.Description,
RedisplayValue: variable.Sensitive,
ValidationValueType: variable.Type,
}
if variable.Default != nil {
defaultData, err := json.Marshal(variable.Default)
if err != nil {
return nil, xerrors.Errorf("parse variable %q default: %w", variable.Name, err)
}
schema.DefaultSource = &proto.ParameterSource{
Scheme: proto.ParameterSource_DATA,
Value: string(defaultData),
}
schema.DefaultDestination = &proto.ParameterDestination{
Scheme: proto.ParameterDestination_PROVISIONER_VARIABLE,
Value: variable.Name,
}
}
if len(variable.Validations) > 0 && variable.Validations[0].Condition != nil {
// Terraform can contain multiple validation blocks, but it's used sparingly
// from what it appears.
validation := variable.Validations[0]
filedata, err := os.ReadFile(variable.Pos.Filename)
if err != nil {
return nil, xerrors.Errorf("read file %q: %w", variable.Pos.Filename, err)
}
schema.ValidationCondition = string(filedata[validation.Condition.Range().Start.Byte:validation.Condition.Range().End.Byte])
schema.ValidationError = validation.ErrorMessage
schema.ValidationTypeSystem = proto.ParameterSchema_HCL
}
return schema, nil
}