From 0fde4cd137f16728885a82452b92c05eb34e9016 Mon Sep 17 00:00:00 2001
From: Tanner Doshier <git@doshitan.com>
Date: Wed, 29 Jan 2025 13:48:17 -0500
Subject: [PATCH] Add scripts for generating migration checkpoints in
 `template-infra`

---
 bin/templatize-legacy-infra         | 99 +++++++++++++++++++++++++++++
 bin/templatize-legacy-infra-version | 34 ++++++++++
 2 files changed, 133 insertions(+)
 create mode 100755 bin/templatize-legacy-infra
 create mode 100755 bin/templatize-legacy-infra-version

diff --git a/bin/templatize-legacy-infra b/bin/templatize-legacy-infra
new file mode 100755
index 0000000..6d5a1d2
--- /dev/null
+++ b/bin/templatize-legacy-infra
@@ -0,0 +1,99 @@
+#!/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/
diff --git a/bin/templatize-legacy-infra-version b/bin/templatize-legacy-infra-version
new file mode 100755
index 0000000..a3d5732
--- /dev/null
+++ b/bin/templatize-legacy-infra-version
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+# Run from the root of a template-infra repo
+
+set -eux
+
+VERSION=$1
+
+# add any executables next to this script to the PATH for easy calling, like
+# templatize-legacy-infra
+SCRIPT_PATH=$(dirname "$(realpath -s "$0")")
+PATH=${SCRIPT_PATH}:${PATH}
+export PATH
+
+worktree_path=$(realpath "../template-infra-${VERSION}")
+
+git worktree add -d "${worktree_path}" "${VERSION}"
+
+pushd "${worktree_path}"
+
+templatize-legacy-infra
+
+msg="${VERSION} Platform CLI Migration Checkpoint"
+git commit --all -m "${msg}"
+git tag -a "platform-cli-migration/${VERSION}" -m "${msg}"
+
+# could push up the tag:
+#
+#   git push origin "platform-cli-migration/${VERSION}"
+#
+# but will do that manually
+
+popd
+
+git worktree remove "${worktree_path}"