terraform-aws-cicd/iam_codepipeline.tf at main · icycloudio/terraform-aws-cicd · GitHub

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data "aws_iam_policy_document" "codepipeline_assume_role" {
  statement {
    effect = "Allow"

    principals {
      type        = "Service"
      identifiers = ["codepipeline.amazonaws.com"]
    }

    actions = ["sts:AssumeRole"]
  }
}

resource "aws_iam_role" "codepipeline_role" {
  name               = "codepipeline-role-${replace(var.app_name, "_", "-")}"
  assume_role_policy = data.aws_iam_policy_document.codepipeline_assume_role.json

  # Merge default tags with pipeline-specific custom tags
  tags = merge(
    var.default_tags,
    var.codepipeline.custom_tags
  )
}

data "aws_iam_policy_document" "codepipeline_actions_policy" {
  statement {
    effect = "Allow"

    actions = [
      "codebuild:BatchGetBuilds",
      "codebuild:StartBuild",
    ]

    resources = concat(
      # Dynamically include all CodeBuild projects
      [for key in keys(var.codebuild_projects) : aws_codebuild_project.codebuild[key].arn],
    )
  }
}

resource "aws_iam_role_policy" "codepipeline_actions_policy" {
  name   = "codepipeline-actions-policy-${replace(var.app_name, "_", "-")}"
  role   = aws_iam_role.codepipeline_role.id
  policy = data.aws_iam_policy_document.codepipeline_actions_policy.json
}

data "aws_iam_policy_document" "code_pipeline_s3_permissions_policy" {
  statement {
    effect = "Allow"

    actions = [
      "s3:GetObject",
      "s3:GetObjectVersion",
      "s3:GetBucketVersioning",
      "s3:PutObject",
      "s3:PutObjectVersionAcl",
      "s3:PutObjectAcl",
      "s3:PutBucketAcl",
    ]

    resources = [
      "arn:aws:s3:::${var.codepipeline.artifact_store.location}/*"
    ]
  }
}

resource "aws_iam_role_policy" "code_pipeline_s3_permissions_policy" {
  name   = "codepipeline-s3-permissions-policy-${replace(var.app_name, "_", "-")}"
  role   = aws_iam_role.codepipeline_role.id
  policy = data.aws_iam_policy_document.code_pipeline_s3_permissions_policy.json
}

data "aws_iam_policy_document" "codestar_connections_policy" {
  statement {
    effect = "Allow"

    actions = [
      "codestar-connections:UseConnection",
    ]

    resources = [
      var.codestar_connection_arn,
    ]
  }
}

resource "aws_iam_role_policy" "codestar_connections_policy" {
  name   = "codepipeline-codestar-connections-policy-${replace(var.app_name, "_", "-")}"
  role   = aws_iam_role.codepipeline_role.id
  policy = data.aws_iam_policy_document.codestar_connections_policy.json
}

data "aws_iam_policy_document" "codestar_notifications_policy" {
  statement {
    effect = "Allow"

    actions = [
      "codestar-notifications:CreateNotificationRule",
      "codestar-notifications:DeleteNotificationRule",
      "codestar-notifications:DescribeNotificationRule",
      "codestar-notifications:UpdateNotificationRule"
    ]

    resources = [
      aws_codestarnotifications_notification_rule.pipeline_notification_rule.arn,
    ]
  }
}

resource "aws_iam_role_policy" "codestar_notifications_policy" {
  name   = "codepipeline-codestar-notifications-policy-${replace(var.app_name, "_", "-")}"
  role   = aws_iam_role.codepipeline_role.id
  policy = data.aws_iam_policy_document.codestar_notifications_policy.json
}

####################################################################################
# Custom Permissions (Custom/Edge Cases)
####################################################################################

# Dynamic policy documents for CodePipeline custom permissions
data "aws_iam_policy_document" "codepipeline_custom_permissions_policy" {
  for_each = var.codepipeline.custom_permissions

  statement {
    effect    = each.value.effect
    actions   = each.value.actions
    resources = each.value.resources

    # Optional condition blocks
    dynamic "condition" {
      for_each = each.value.condition
      content {
        test     = condition.value.test
        variable = condition.value.variable
        values   = condition.value.values
      }
    }
  }
}

# Attach custom permissions as individual policies to CodePipeline role
resource "aws_iam_role_policy" "codepipeline_custom_permissions_policy" {
  for_each = var.codepipeline.custom_permissions

  # Use the permission name from config as policy name
  name   = each.key
  role   = aws_iam_role.codepipeline_role.id
  policy = data.aws_iam_policy_document.codepipeline_custom_permissions_policy[each.key].json
}