From e6d47c2b25df5a68fc1d0397927c903d220d99e0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aur=C3=A9lien=20Delobelle?= <aurelien.delobelle@gmail.com>
Date: Mon, 7 Jan 2019 22:36:54 +0100
Subject: [PATCH] wip -- core.deploy -- Scripts to deploy {www,dev}.cof

---
 provisioning/bootstrap.sh |   4 +-
 provisioning/deploy.sh    | 140 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 142 insertions(+), 2 deletions(-)
 create mode 100644 provisioning/deploy.sh

diff --git a/provisioning/bootstrap.sh b/provisioning/bootstrap.sh
index cb6917a7..5ba96d57 100644
--- a/provisioning/bootstrap.sh
+++ b/provisioning/bootstrap.sh
@@ -16,8 +16,8 @@ apt-get install -y python3-pip python3-dev python3-venv libpq-dev postgresql \
                    postgresql-contrib libjpeg-dev nginx git redis-server
 
 # Postgresql
-sudo -u postgres createdb $DBNAME
-sudo -u postgres createuser -SdR $DBUSER
+sudo -u postgres createdb $DBNAME || echo "Database creation: skipped"
+sudo -u postgres createuser -SdR $DBUSER || echo "Database user creation: skipped"
 sudo -u postgres psql -c "ALTER USER $DBUSER WITH PASSWORD '$DBPASSWD';"
 sudo -u postgres psql -c "GRANT ALL PRIVILEGES ON DATABASE $DBNAME TO $DBUSER;"
 
diff --git a/provisioning/deploy.sh b/provisioning/deploy.sh
new file mode 100644
index 00000000..2492958d
--- /dev/null
+++ b/provisioning/deploy.sh
@@ -0,0 +1,140 @@
+#!/bin/bash
+
+set -eu
+
+info()    { echo "[INFO]    $*"; }
+warning() { echo "[WARNING] $*"; }
+error()   { echo "[ERROR]   $*"; }
+fatal()   { echo "[FATAL]   $*"; exit 1; }
+
+# Config
+#
+# Presets are available, and can be used with the env var "TARGET_NAME":
+# - TARGET_NAME=www.cof for www.cof.ens.fr
+# - TARGET_NAME=dev.cof for dev.cof.ens.fr
+
+TARGET_NAME="${TARGET_NAME:-dev.cof}"
+
+SERVICE_DIR="${SERVICE_DIR:-/etc/system/systemd}"
+
+if [ "${TARGET_NAME}" = "www.cof" ]; then
+    DJANGO_SETTINGS_MODULE="cof.settings.prod"
+    SERVICE_DAPHNE_PATH="${SERVICE_DIR}/gestiocof-daphne.service"
+    SERVICE_WORKER_PATH="${SERVICE_DIR}/gestiocof-worker.service"
+    SERVICE_LOCAL_DIR="./provisioning/www.cof/systemd"
+    VENV="<path/to/venv>"
+elif [ "${TARGET_NAME}" = "dev.cof" ]; then
+    DJANGO_SETTINGS_MODULE="cof.settings.<WHICH ONE?>"
+    SERVICE_DAPHNE_PATH="${SERVICE_DIR}/gestiocof-dev-daphne.service"
+    SERVICE_WORKER_PATH="${SERVICE_DIR}/gestiocof-dev-worker.service"
+    SERVICE_LOCAL_DIR="./provisioning/dev.cof/systemd"
+    VENV="<path/to/venv>"
+fi
+
+SERVICE_LOCAL_DAPHNE_PATH="${SERVICE_LOCAL_DIR}/daphne.service"
+SERVICE_LOCAL_WORKER_PATH="${SERVICE_LOCAL_DIR}/worker.service"
+PYTHON="DJANGO_SETTINGS_MODULE=${DJANGO_SETTINGS_MODULE} ${VENV}/bin/python"
+
+# Default to @{u}, equivalent to "origin/<current branch>".
+GIT_TARGET="${GIT_TARGET:-@{u}}"
+
+# Services
+
+service_print_changes() {
+    # TODO: One could check diff, print it and prompt user to confirm.
+    # info ">>> Services: diff"
+    return
+}
+
+service_start() {
+    info "Starting service ${1}..."
+    sudo systemctl enable "${2}"
+    sudo systemctl start "${2}"
+}
+
+service_stop() {
+    info "Stopping service ${1}... "
+    if sudo systemctl stop "${2}"; then info OK; else warning SKIPPED; fi
+}
+
+service_upgrade_config() {
+    info "Upgrading config of service ${1}... "
+    sudo cp "${2}" "${3}"
+}
+
+service_start_all() {
+    info ">>> Services: starting all..."
+    service_start Worker "${SERVICE_WORKER_PATH}"
+    service_start Daphne "${SERVICE_DAPHNE_PATH}"
+}
+
+service_stop_all() {
+    info ">>> Services: stopping all..."
+    service_stop Worker "${SERVICE_WORKER_PATH}"
+    service_stop Daphne "${SERVICE_DAPHNE_PATH}"
+}
+
+service_upgrade_config_all() {
+    info ">>> Services: upgrading all..."
+    service_upgrade Daphne "${SERVICE_LOCAL_DAPHNE_PATH}" "${SERVICE_DAPHNE_PATH}"
+    service_upgrade Worker "${SERVICE_LOCAL_WORKER_PATH}" "${SERVICE_WORKER_PATH}"
+    systemctl daemon-reload
+}
+
+# Django
+
+django_migrate() {
+    info ">>> Django: applying database migrations..."
+    ${PYTHON} manage.py migrate
+}
+
+django_collectstatic() {
+    info ">>> Django: collecting static assets and placing them in configured location..."
+    ${PYTHON} manage.py collectstatic
+}
+
+# Git
+
+git_check_clean_workingtree() {
+    [ -z "$(git status --porcelain)" ]
+}
+
+git_run_checks() {
+    info ">>> Git: running checks"
+
+    info "- Checking working tree state... "
+    if ! git_check_clean_workingtree; then
+        git status -s
+        warning "The working tree is not cleaned. Some data could be lost."
+        warning "Stash or commit the changes."
+        read -rp "Do you want to continue? [y/N] " continue
+        [ "$continue" = y ] || fatal "Aborting!"
+    fi
+
+    info "- Current commit is: $(git rev-parse HEAD)"
+    info "- New commit will be: ${GIT_TARGET}"
+}
+
+git_upgrade() {
+    info ">>> Git: pulling latest version of remote branch"
+    # git fetch
+    # git reset --hard "${GIT_TARGET}"
+}
+
+# Our job
+
+main() {
+    git_run_checks
+    service_stop_all
+    git_upgrade
+    # TODO: Handle failure of the following commands
+    service_print_changes
+    django_migrate
+    django_collectstatic
+    service_upgrade_all
+    service_start_all
+}
+
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    main "$@"
+fi