chore(bootstrap): Added templating
This commit is contained in:
Daniël Groothuis
217
init-app.sh
217
init-app.sh
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#!/usr/bin/env bash
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# init-app.sh
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# Creates clusters/<cluster>/apps/<application> relative to this script, renders templates,
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# updates parent clusters/<cluster>/apps/kustomization.yaml to include the new application,
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# and stages changes in Git.
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set -euo pipefail
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resolve_script_dir() {
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local src="${BASH_SOURCE[0]:-$0}"
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while [ -h "$src" ]; do
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local dir
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dir="$(cd -P "$(dirname "$src")" && pwd)"
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src="$(readlink "$src")"
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[[ "$src" != /* ]] && src="$dir/$src"
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done
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cd -P "$(dirname "$src")" >/dev/null 2>&1
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pwd
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}
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SCRIPT_DIR="$(resolve_script_dir)"
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# Application name
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read -r -p "Application name (lowercase, letters/numbers/dashes): " APPLICATION_NAME
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APPLICATION_NAME="$(echo "$APPLICATION_NAME" | awk '{$1=$1;print}')"
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if [[ -z "$APPLICATION_NAME" ]]; then
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echo "Error: Application name cannot be empty." >&2
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exit 1
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fi
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if ! [[ "$APPLICATION_NAME" =~ ^[a-z0-9-]+$ ]]; then
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echo "Error: Application name must be lowercase and contain only letters (a-z), numbers (0-9), or dashes (-)." >&2
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exit 1
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fi
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if [[ "$APPLICATION_NAME" == *"/"* || "$APPLICATION_NAME" == *"\\"* ]]; then
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echo "Error: Application name must not contain path separators (/ or \\)." >&2
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exit 1
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fi
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# Cluster name
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DEFAULT_CLUSTER="artemis"
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read -r -p "Cluster name [${DEFAULT_CLUSTER}] (lowercase, letters/numbers/dashes): " CLUSTER_NAME
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CLUSTER_NAME="${CLUSTER_NAME:-$DEFAULT_CLUSTER}"
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CLUSTER_NAME="$(echo "$CLUSTER_NAME" | awk '{$1=$1;print}')"
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if [[ -z "$CLUSTER_NAME" ]]; then
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echo "Error: Cluster name cannot be empty." >&2
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exit 1
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fi
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if ! [[ "$CLUSTER_NAME" =~ ^[a-z0-9-]+$ ]]; then
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echo "Error: Cluster name must be lowercase and contain only letters (a-z), numbers (0-9), or dashes (-)." >&2
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exit 1
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fi
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if [[ "$CLUSTER_NAME" == *"/"* || "$CLUSTER_NAME" == *"\\"* ]]; then
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echo "Error: Cluster name must not contain path separators (/ or \\)." >&2
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exit 1
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fi
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# Description (allows spaces, letters upper/lower, digits, dot, comma)
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read -r -p "Description (spaces, letters, numbers, dots, commas): " DESCRIPTION
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DESCRIPTION="$(echo "$DESCRIPTION" | sed 's/^[[:space:]]\+//; s/[[:space:]]\+$//')"
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if [ -z "$DESCRIPTION" ]; then
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echo "Error: Description cannot be empty." >&2
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exit 1
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fi
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# Portable validation using grep -Eq (works under sh, dash, bash)
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# Allowed chars: A-Za-z0-9 space dot comma
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if ! echo "$DESCRIPTION" | grep -Eq '^[A-Za-z0-9 .,]+$'; then
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echo "Error: Description may only contain spaces, letters (A–Z, a–z), numbers (0–9), dots (.), and commas (,)." >&2
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exit 1
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fi
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TARGET_DIR="${SCRIPT_DIR}/clusters/${CLUSTER_NAME}/apps/${APPLICATION_NAME}"
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# Abort if target directory already exists
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if [[ -d "$TARGET_DIR" ]]; then
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echo "Error: Directory already exists: $TARGET_DIR" >&2
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exit 1
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fi
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# Templates
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TEMPLATE_DIR="${SCRIPT_DIR}/.templates"
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APP_PROJECT_SRC="${TEMPLATE_DIR}/app-project.yaml"
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APPLICATION_SRC="${TEMPLATE_DIR}/application.yaml"
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KUSTOMIZATION_SRC="${TEMPLATE_DIR}/kustomization.yaml}
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missing=false
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for f in "$APP_PROJECT_SRC" "$APPLICATION_SRC" "$KUSTOMIZATION_SRC"; do
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if [[ ! -f "$f" ]]; then
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echo "Error: Template not found: ${f}" >&2
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missing=true
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fi
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done
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if [[ "$missing" == true ]]; then
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exit 1
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fi
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# Create target directory
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mkdir -p "$TARGET_DIR"
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# Prepare safe replacements
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safe_app_name="${APPLICATION_NAME//\\/\\\\}"
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safe_app_name="${safe_app_name//&/\\&}"
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safe_description="${DESCRIPTION//\\/\\\\}"
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safe_description="${safe_description//&/\\&}"
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safe_cluster_name="${CLUSTER_NAME//\\/\\\\}"
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safe_cluster_name="${safe_cluster_name//&/\\&}"
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# Render app-project.yaml
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APP_PROJECT_DEST="${TARGET_DIR}/app-project.yaml"
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tmp1="$(mktemp)"
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trap 'rm -f "$tmp1" "$tmp2" "$tmp3" "$tmp_parent" "$tmp_norm" "$tmp_slice"' EXIT
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sed -e "s/\${APPLICATION_NAME}/${safe_app_name}/g" \
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-e "s/\${DESCRIPTION}/${safe_description}/g" \
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"$APP_PROJECT_SRC" > "$tmp1"
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mv "$tmp1" "$APP_PROJECT_DEST"
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# Render application.yaml (replace APPLICATION_NAME and CLUSTER_NAME)
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APPLICATION_DEST="${TARGET_DIR}/application.yaml"
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tmp2="$(mktemp)"
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sed -e "s/\${APPLICATION_NAME}/${safe_app_name}/g" \
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-e "s/\${CLUSTER_NAME}/${safe_cluster_name}/g" \
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"$APPLICATION_SRC" > "$tmp2"
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mv "$tmp2" "$APPLICATION_DEST"
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# Copy kustomization.yaml as-is
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KUSTOMIZATION_DEST="${TARGET_DIR}/kustomization.yaml"
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cp "$KUSTOMIZATION_SRC" "$KUSTOMIZATION_DEST"
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echo "Created: $TARGET_DIR"
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echo "Wrote: $APP_PROJECT_DEST (APPLICATION_NAME='${APPLICATION_NAME}', DESCRIPTION set)"
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echo "Wrote: $APPLICATION_DEST (APPLICATION_NAME='${APPLICATION_NAME}', CLUSTER_NAME='${CLUSTER_NAME}')"
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echo "Wrote: $KUSTOMIZATION_DEST (copied as-is)"
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# Update parent kustomization.yaml one level above the new folder
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PARENT_KUSTOMIZATION="${SCRIPT_DIR}/clusters/${CLUSTER_NAME}/apps/kustomization.yaml"
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if [[ ! -f "$PARENT_KUSTOMIZATION" ]]; then
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echo "Error: Parent kustomization not found: ${PARENT_KUSTOMIZATION}" >&2
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echo "Hint: Ensure a kustomization.yaml exists in clusters/${CLUSTER_NAME}/apps/" >&2
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exit 1
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fi
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# Normalize CRLF line endings if present
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if file "$PARENT_KUSTOMIZATION" | grep -q "CRLF"; then
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tmp_norm="$(mktemp)"
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tr -d '\r' < "$PARENT_KUSTOMIZATION" > "$tmp_norm"
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mv "$tmp_norm" "$PARENT_KUSTOMIZATION"
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fi
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# If already present, skip
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if grep -Eq "^[[:space:]]*-[[:space:]]*${APPLICATION_NAME}[[:space:]]*$" "$PARENT_KUSTOMIZATION"; then
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echo "Parent kustomization.yaml already contains resource '${APPLICATION_NAME}', skipping insertion."
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else
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# Determine indentation from the first existing resource item (fallback two spaces)
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indent="$(grep -E '^[[:space:]]*-[[:space:]]' "$PARENT_KUSTOMIZATION" | sed -n '1s/^\([[:space:]]*\)-.*/\1/p')"
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[[ -z "${indent:-}" ]] && indent=" "
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# Work within the most recent 'resources:' block
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last_res_start_line="$(nl -ba "$PARENT_KUSTOMIZATION" | awk '/^[[:space:]]*[0-9]+\s+resources:[[:space:]]*$/ { line=$1 } END { if (line!="") print line }')"
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if [[ -n "${last_res_start_line:-}" ]]; then
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tmp_slice="$(mktemp)"
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tail -n +"$last_res_start_line" "$PARENT_KUSTOMIZATION" > "$tmp_slice"
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slice_last_line="$(nl -ba "$tmp_slice" \
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| awk '/^[[:space:]]*[0-9]+\s+[[:space:]]*-[[:space:]]/ { print $1 }' \
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| tail -n1)"
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if [[ -n "${slice_last_line:-}" ]]; then
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abs_last_line=$(( last_res_start_line + slice_last_line - 1 ))
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tmp_parent="$(mktemp)"
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{
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head -n "$abs_last_line" "$PARENT_KUSTOMIZATION"
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printf "%s- %s\n" "$indent" "$APPLICATION_NAME"
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tail -n +"$((abs_last_line + 1))" "$PARENT_KUSTOMIZATION"
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} > "$tmp_parent"
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mv "$tmp_parent" "$PARENT_KUSTOMIZATION"
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echo "Updated parent kustomization.yaml: appended '${APPLICATION_NAME}' to resources."
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else
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# No items yet → insert directly after the resources key line
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tmp_parent="$(mktemp)"
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{
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head -n "$last_res_start_line" "$PARENT_KUSTOMIZATION"
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printf "%s- %s\n" "$indent" "$APPLICATION_NAME"
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tail -n +"$((last_res_start_line + 1))" "$PARENT_KUSTOMIZATION"
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} > "$tmp_parent"
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mv "$tmp_parent" "$PARENT_KUSTOMIZATION"
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echo "Updated parent kustomization.yaml: added first resource '${APPLICATION_NAME}' under resources."
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fi
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rm -f "$tmp_slice"
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else
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# No resources key exists at all → create section at the end ONCE
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tmp_parent="$(mktemp)"
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{
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cat "$PARENT_KUSTOMIZATION"
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printf "\nresources:\n%s- %s\n" "$indent" "$APPLICATION_NAME"
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} > "$tmp_parent"
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mv "$tmp_parent" "$PARENT_KUSTOMIZATION"
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echo "Updated parent kustomization.yaml: created resources section with '${APPLICATION_NAME}'."
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fi
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fi
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# Stage changes in Git (if inside a Git repo)
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if git -C "$SCRIPT_DIR" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
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REPO_ROOT="$(git -C "$SCRIPT_DIR" rev-parse --show-toplevel)"
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REL_TARGET="${TARGET_DIR#$REPO_ROOT/}"
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REL_PARENT="${PARENT_KUSTOMIZATION#$REPO_ROOT/}"
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git -C "$REPO_ROOT" add "$REL_TARGET" "$REL_PARENT"
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echo "Git: staged new directory/files and parent kustomization: $REL_TARGET, $REL_PARENT"
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echo "Next: commit with a message, e.g.:"
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echo " git -C \"$REPO_ROOT\" commit -m \"feat(${CLUSTER_NAME}): add ${APPLICATION_NAME} app (\"${DESCRIPTION}\") and update kustomization\""
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else
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echo "Note: Not inside a Git repository (no .git found). Skipping git add."
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fi
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