build: add installer script

scripts/installer/README.md

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+# install.abra.coopcloud.tech
+
+To deploy, run `make`.
+
+You have to be an [Autonomic](https://autonomic.zone) member to do this.

scripts/installer/compose.yml

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+---
+version: "3.8"
+
+services:
+  app:
+    image: "nginx:stable"
+    configs:
+      - source: abra_conf
+        target: /etc/nginx/conf.d/abra.conf
+      - source: abra_installer
+        target: /var/www/abra-installer/installer
+    volumes:
+      - "public:/var/www/abra-installer"
+    networks:
+      - proxy
+    deploy:
+      update_config:
+        failure_action: rollback
+        order: start-first
+      labels:
+        - "traefik.enable=true"
+        - "traefik.http.services.abra-installer.loadbalancer.server.port=80"
+        - "traefik.http.routers.abra-installer.rule=Host(`install.abra.autonomic.zone`,`install.abra.coopcloud.tech`)"
+        - "traefik.http.routers.abra-installer.entrypoints=web-secure"
+        - "traefik.http.routers.abra-installer.tls.certresolver=production"
+
+configs:
+  abra_installer:
+    file: installer
+  abra_conf:
+    file: nginx.conf
+
+networks:
+  proxy:
+    external: true
+
+volumes:
+  public:

scripts/installer/installer

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+#!/usr/bin/env bash
+
+ABRA_VERSION="0.1.1-alpha"
+ABRA_RELEASE_URL="https://git.coopcloud.tech/api/v1/repos/coop-cloud/abra/releases/tags/$ABRA_VERSION"
+
+function show_banner {
+  echo ""
+  echo "   ____                           ____ _                 _ "
+  echo "  / ___|___         ___  _ __    / ___| | ___  _   _  __| |"
+  echo " | |   / _ \ _____ / _ \| '_ \  | |   | |/ _ \| | | |/ _' |"
+  echo " | |__| (_) |_____| (_) | |_) | | |___| | (_) | |_| | (_| |"
+  echo "  \____\___/       \___/| .__/   \____|_|\___/ \__,_|\__,_|"
+  echo "                        |_|"
+  echo ""
+  echo ""
+  echo "          === Public interest infrastructure ===           "
+  echo ""
+  echo ""
+}
+
+function install_abra_release {
+  mkdir -p "$HOME/.local/bin"
+
+  if ! type "curl" > /dev/null 2>&1; then
+    echo "'curl' is not installed, cannot proceed..."
+    echo "perhaps try installing manually via the releases URL?"
+    echo "https://git.coopcloud.tech/coop-cloud/abra/releases"
+    exit 1
+  fi
+
+  if ! type "curl" > /dev/null 2>&1; then
+    error "'python3' is not installed, cannot proceed..."
+    echo "perhaps try installing manually via the releases URL?"
+    echo "https://git.coopcloud.tech/coop-cloud/abra/releases"
+  fi
+
+  # FIXME: support different architectures
+  release_url=$(curl -s "$ABRA_RELEASE_URL" |
+    python3 -c "import sys, json; \
+                payload = json.load(sys.stdin); \
+                url = [a['browser_download_url'] for a in payload['assets'] if 'arm64' in a['name']][0]; \
+                print(url)")
+
+  echo "downloading $ABRA_VERSION AMD64 binary release for abra..."
+  curl --progress-bar "$release_url" --output "$HOME/.local/bin/abra"
+  chmod +x "$HOME/.local/bin/abra"
+
+  echo "abra installed to $HOME/.local/bin/abra"
+}
+
+function run_installation {
+  show_banner
+  install_abra_release
+}
+
+run_installation "$@"
+exit 0

scripts/installer/makefile

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+STACK := abra_installer_script
+
+default: deploy
+
+deploy:
+	@docker stack rm $(STACK) && \
+		docker stack deploy -c compose.yml $(STACK)

scripts/installer/nginx.conf

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+server {
+  listen         80 default_server;
+  server_name    install.abra.autonomic.zone install.abra.coopcloud.tech;
+
+  location / {
+    root /var/www/abra-installer;
+    add_header Content-Type text/plain;
+    index installer;
+  }
+}