templatize-legacy-infra

#!/usr/bin/env bash
# Convert a template-infra worktree into one that minimally supports the
# Platform CLI tooling.
#
# Run from the root of a template-infra worktree.

set -eu

rename_file() {
    local original_file=$1
    local renamed_file=$2

    mkdir -p "${renamed_file%/*}"
    git mv "$original_file" "${renamed_file}"
}

rename_app_file() {
    local original_file=$1
    local renamed_file="${original_file/app/{{app_name\}\}}"

    rename_file "${original_file}" "${renamed_file}"
}

if [[ -d .template-infra/ ]]; then
    echo "Already templatized"
    exit
fi

# get rid of example app junk
find app -not -name Makefile -delete &> /dev/null || :
git add -u

# rename "app" files
for f in $(git ls-files '*app*' | grep -v '^docs/' | grep -v 'template-only' | grep '\bapp\b'); do
    rename_app_file "${f}"
done

# rather than copy over the upstream copier file:
#
#   curl -O https://raw.githubusercontent.com/navapbc/template-infra/refs/heads/main/copier.yml
#
# we'll use a simplified version, since the only variable we are using is
# `app_name`
cat <<EOF > copier.yml
template:
  type: str
  choices:
    - base
    - app

#
# App vars
#
app_name:
  type: str
  help: The name of the app
  validator: >-
    {% if not (app_name | regex_search('^[a-z0-9\-_]+$')) %}
    The app name can not be empty and should only contain lower case letters, digits, dashes, and underscores.
    {% endif %}
  when: &app
    "{{ template == 'app' }}"

_envops:
  trim_blocks: true
  lstrip_blocks: true

_skip_if_exists:
  - "/{{ app_name }}/"
  - "/{{ app_name }}/Makefile"

_exclude:
  - /.git
  - /copier.yml
  - /CODEOWNERS
  - /CONTRIBUTING.md
  - /LICENSE.md
  - /README.md
EOF

# create answers file
mkdir .template-infra
echo -e "# Changes here will be overwritten by Copier\n{{ _copier_answers|to_nice_yaml -}}" > '.template-infra/{{_copier_conf.answers_file}}.jinja'

# fixup CI stuff, for file/path triggers
for f in $(rg -l -e 'app/' -e '-app-' .github/ | grep -v 'template-only' | grep -v 'README.md'); do
    renamed_file=$f.jinja
    git mv "${f}" "${renamed_file}"
    sed -ri 's|app/|{{ app_name }}/|g' "${renamed_file}"
    # sed -ri 's|-app-|-{{ app_name }}-|g' "${renamed_file}"
    sed -ri "s/-app(\b.*yml)/-{{ app_name}}\1/g" "${renamed_file}"
    sed -ri "s/app_name: app/app_name: {{ app_name}}/g" "${renamed_file}"
    sed -ri 's/app_name: "app"/app_name: {{ app_name}}/g' "${renamed_file}"
    # sed -ri 's/\$\{\{(.*)\}\}/\$\{\{"\{\{"\}\}\1\{\{"\}\}"\}\}/g' "${renamed_file}"
    perl -pi -e 's|\$\{\{(.*?)\}\}|\$\{\{"\{\{"\}\}\1\{\{"\}\}"\}\}|g' "${renamed_file}"
    sed -ri "s/\bApp\b/{{ app_name}}/g" "${renamed_file}"
done

git add copier.yml .template-infra/