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This is a simple bash script to simply import a Github Organization into Terraform. It uses the Github API and Terraform CLI to import the following resources:

  • all public repos (includes pagination support for Orgs with 100+ repos)
  • all private repos (includes pagination support for Orgs with 100+ repos)
  • all team repos (includes pagination support for Orgs with 100+ repos)
  • all teams
  • all team memberships
  • all organization members

After importing the resources the script also writes a basic terraform.tf config for each resource, making this a fully automated process.

How the script works

Public repos

Imports all public repos owned by the organization (includes full pagination support for Orgs with 100+ repos). Also writes a Terraform resource block in a single file ($ORG-public-repos.tf), using the following template and populating it with values pulled via the Github API:

resource "github_repository" "$PUBLIC_REPO_NAME" {
  name        = "$PUBLIC_REPO_NAME"
  private     = false
  description = "$PUBLIC_REPO_DESCRIPTION"
  has_wiki    = "$PUBLIC_REPO_WIKI"
  has_downloads = "$PUBLIC_REPO_DOWNLOADS"
  has_issues  = "$PUBLIC_REPO_ISSUES"
}

Private repos

Imports all private repos owned by the organization (includes full pagination support for Orgs with 100+ repos). Also writes a Terraform resource block in a single file ($ORG-private-repos.tf), using the following template and populating it with values pulled via the Github API:

resource "github_repository" "$PRIVATE_REPO_NAME" {
  name        = "$PRIVATE_REPO_NAME"
  private     = true
  description = "$PRIVATE_REPO_DESCRIPTION"
  has_wiki    = "$PRIVATE_REPO_WIKI"
  has_downloads = "$PRIVATE_REPO_DOWNLOADS"
  has_issues  = "$PRIVATE_REPO_ISSUES"
}

Team repos

Imports all team repos owned by the organization (includes full pagination support for Orgs with 100+ repos). Also writes a Terraform resource block in a unique file per team ($ORG-teams-$TEAM_NAME.tf), using the following template and populating it with values pulled via the Github API:

resource "github_team_repository" "$TEAM_NAME-$TERRAFORM_TEAM_REPO_NAME" {
  team_id    = "$TEAM_ID"
  repository = "$REPO_NAME"
  permission = "admin" or "push" or "pull"
}

Teams

Imports all teams belonging to the organization. Also writes a Terraform resource block in a unique file per team ($ORG-teams-$TEAM_NAME.tf), using the following template and populating it with values pulled via the Github API:

resource "github_team" "$TEAM_NAME" {
  name        = "$TEAM_NAME"
  description = "$TEAM_DESCRIPTION"
  privacy     = "closed" or "secret"
}

Team memberships

Imports the team membership for all teams owned by the organization (what users belong to what teams). Also writes a Terraform resource block in a unique file per team ($ORG-team-memberships-$TEAM_NAME.tf), using the following template and populating it with values pulled via the Github API:

resource "github_team_membership" "$TEAM_NAME-$USER_NAME" {
  username    = "$USER_NAME"
  team_id     = "$TEAM_ID"
  role        = "maintainer" or "member"
}

Organization members

Imports all users belonging to the organization. Also writes a Terraform resource block in a single file ($ORG-users.tf), using the following template and populating it with values pulled via the Github API:

resource "github_membership" "$USER_NAME" {
  username        = "$USER_NAME"
  role            = "member"
}

How to use the script

Requirements

  • An existing Github account with a user that belongs to an organization
  • A github personal access token with the following permissions:
    • repo (all)
    • admin:org (all)
  • Terraform
  • jq

Do it

  • git clone this repo

  • create a basic terraform configuration file, e.g. main.tf with something like:

    provider "github" {
  token        = "TOKENGOESHERE"
  organization = "my_org"
  # optional, if using GitHub Enterprise
  base_url     =  "https://github.mycompany.com/api/v3/"
}

  • run terraform init to e.g. install the GitHub provider

  • configure the variables at the top of the script

    • GITHUB_TOKEN=...
    • ORG=...
    • if you're using GitHub Enterprise, API_URL_PREFIX=... or remember to pass them in via the environment

  • run the scriptm, perhaps passing the necessary environment variables

    GITHUB_TOKEN=12334...4555 ORG=my_org github-to-terraform.sh

  • run a terraform plan to see that everything was imported and that no changes are required.

    • some manual modifications could be required since not every field supported by Terraform has been implemented by this script.
    • HEADS UP - the script hardcodes user roles to "member".

Using with GitHub Enterprise

This should also work with GitHub Enterprise deployments if you also set (either editing the script or via an environment variable) the API_URL_PREFIX correctly, e.g. https://github.mycompany.com/api/v3.