init

.github/workflows/publish.yml

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+name: Build and Publish Docker Image
+
+on:
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      packages: write
+      id-token: write
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+        with:
+          platforms: linux/amd64,linux/arm64
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and Publish
+        uses: docker/build-push-action@v4
+        with:
+          file: Dockerfile
+          platforms: linux/arm64, linux/amd64
+          push: true
+          tags: ghcr.io/${{ github.repository }}:latest

Dockerfile

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+FROM alpine
+
+RUN apk update && apk add postgresql-client bash ncurses
+
+WORKDIR app
+
+ADD . .
+
+CMD bash migrate.sh

migrate.sh

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+#!/bin/bash
+
+set -o pipefail
+
+export TERM=ansi
+_GREEN=$(tput setaf 2)
+_BLUE=$(tput setaf 4)
+_MAGENTA=$(tput setaf 5)
+_CYAN=$(tput setaf 6)
+_RED=$(tput setaf 1)
+_YELLOW=$(tput setaf 3)
+_RESET=$(tput sgr0)
+_BOLD=$(tput bold)
+
+# Function to print error messages and exit
+error_exit() {
+    printf "[ ${_RED}ERROR${_RESET} ] ${_RED}$1${_RESET}\n" >&2
+    exit 1
+}
+
+section() {
+  printf "${_RESET}\n"
+  echo "${_BOLD}${_BLUE}==== $1 ====${_RESET}"
+}
+
+write_ok() {
+  echo "[$_GREEN OK $_RESET] $1"
+}
+
+write_warn() {
+  echo "[$_YELLOW WARN $_RESET] $1"
+}
+
+trap 'echo "An error occurred. Exiting..."; exit 1;' ERR
+
+printf "${_BOLD}${_MAGENTA}"
+echo "+-------------------------------------+"
+echo "|                                     |"
+echo "|  Railway Postgres Migration Script  |"
+echo "|                                     |"
+echo "+-------------------------------------+"
+printf "${_RESET}\n"
+
+echo "For more information, see https://docs.railway.app/database/migration"
+echo "If you run into any issues, please reach out to us on Discord: https://discord.gg/railway"
+printf "${_RESET}\n"
+
+section "Validating environment variables"
+
+# Validate that PLUGIN_URL environment variable exists
+if [ -z "$PLUGIN_URL" ]; then
+    error_exit "PLUGIN_URL environment variable is not set."
+fi
+
+write_ok "PLUGIN_URL correctly set"
+
+# Validate that NEW_URL environment variable exists
+if [ -z "$NEW_URL" ]; then
+    error_exit "NEW_URL environment variable is not set."
+fi
+
+write_ok "NEW_URL correctly set"
+
+section "Checking if NEW_URL is empty"
+
+# Query to check if there are any tables in the new database
+query="SELECT count(*) FROM information_schema.tables WHERE table_schema NOT IN ('information_schema', 'pg_catalog');"
+table_count=$(psql "$NEW_URL" -t -A -c "$query")
+
+if [[ $table_count -eq 0 ]]; then
+  if [ -z "$OVERWRITE_DATABASE" ]; then
+    write_ok "The new database is empty. Proceeding with restore."
+  fi
+else
+  if [ -z "$OVERWRITE_DATABASE" ]; then
+    error_exit "The new database is not empty. Aborting migration.\nSet the OVERWRITE_DATABASE environment variable to overwrite the new database."
+  fi
+  write_warn "The new database is not empty. Found OVERWRITE_DATABASE environment variable. Proceeding with restore."
+fi
+
+section "Dumping database from PLUGIN_URL" 
+
+# Run pg_dump on the plugin database
+dump_file="plugin_dump.sql"
+pg_dump -Fc "$PLUGIN_URL" > "$dump_file" || error_exit "Failed to dump database from $PLUGIN_URL."
+
+write_ok "Successfully saved dump to $dump_file"
+
+dump_file_size=$(ls -lh "$dump_file" | awk '{print $5}')
+echo "Dump file size: $dump_file_size"
+
+section "Restoring database to NEW_URL"
+
+# Restore that data to the new database
+pg_restore -d "$NEW_URL" "$dump_file" || error_exit "Failed to restore database to $NEW_URL."
+
+write_ok "Successfully restored database to NEW_URL"
+
+printf "${_RESET}\n"
+printf "${_RESET}\n"
+echo "${_BOLD}${_GREEN}Migration completed successfully${_RESET}"
+printf "${_RESET}\n"
+echo "Next steps..."
+echo "1. Update your application's DATABASE_URL environment variable to point to the new database."
+echo '  - You can use variable references to do this. For example `${{ Postgres.DATABASE_URL }}`'
+echo "2. Verify that your application is working as expected."
+echo "3. Remove the legacy plugin and this service from your Railway project."
+
+printf "${_RESET}\n"