144 lines
4.4 KiB
Bash
Executable File
144 lines
4.4 KiB
Bash
Executable File
#!/bin/bash
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set -o errexit
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set -o pipefail
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# set -o xtrace
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# Load libraries
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# shellcheck disable=SC1091
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. /opt/bitnami/base/functions
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# Constants
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INIT_SEM=/tmp/initialized.sem
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# Functions
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########################
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# Replace a regex in a file
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# Arguments:
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# $1 - filename
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# $2 - match regex
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# $3 - substitute regex
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# $4 - regex modifier
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# Returns: none
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#########################
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replace_in_file() {
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local filename="${1:?filename is required}"
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local match_regex="${2:?match regex is required}"
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local substitute_regex="${3:?substitute regex is required}"
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local regex_modifier="${4:-}"
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local result
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# We should avoid using 'sed in-place' substitutions
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# 1) They are not compatible with files mounted from ConfigMap(s)
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# 2) We found incompatibility issues with Debian10 and "in-place" substitutions
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result="$(sed "${regex_modifier}s@${match_regex}@${substitute_regex}@g" "$filename")"
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echo "$result" > "$filename"
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}
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########################
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# Ensure gems are up to date
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# Arguments: none
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# Returns: boolean
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#########################
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gems_up_to_date() {
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bundle check 1> /dev/null
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}
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########################
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# Wait for database to be ready
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# Globals:
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# DATABASE_HOST
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# Arguments:
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# None
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# Returns: none
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#########################
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wait_for_db() {
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local db_host="${DATABASE_HOST:-mariadb}"
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local db_address
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db_address="$(getent hosts "$db_host" | awk '{ print $1 }')"
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counter=0
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log "Connecting to MariaDB at $db_address"
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while ! nc -z "$db_host" 3306; do
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counter=$((counter+1))
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if [ $counter == 30 ]; then
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log "Error: Couldn't connect to MariaDB."
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exit 1
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fi
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log "Trying to connect to mariadb at $db_address. Attempt $counter."
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sleep 5
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done
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}
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print_welcome_page
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if [[ "$1" = "bundle" ]] && [[ "$2" = "exec" ]]; then
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if [[ -f /app/config.ru ]]; then
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log "Rails project found. Skipping creation..."
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else
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log "Creating new Rails project..."
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rails new . --skip-bundle --database mysql
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# Add mini_racer
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replace_in_file "Gemfile" "# gem 'mini_racer'" "gem 'mini_racer'"
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# TODO: substitution using 'yq' once they support anchors
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# Related issue: https://github.com/mikefarah/yq/issues/178
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# E.g: yq w -i /app/config/database.yml default.host '<%= ENV.fetch("DATABASE_HOST") { mariadb } %>'
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# E.g: yq w -i /app/config/database.yml development.database '<%= ENV.fetch("DATABASE_NAME") { mariadb } %>'
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log "Setting default host to \`${DATABASE_HOST:-mariadb}\`..."
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replace_in_file "/app/config/database.yml" "host:.*$" "host: <%= ENV.fetch(\"DATABASE_HOST\", \"mariadb\") %>"
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log "Setting development database to \`${DATABASE_NAME:-my_app_development}\`..."
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replace_in_file "/app/config/database.yml" "database:.*$" "database: <%= ENV.fetch(\"DATABASE_NAME\", \"my_app_development\") %>" "1,/test:/ "
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fi
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if ! gems_up_to_date; then
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log "Installing/Updating Rails dependencies (gems)..."
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bundle install
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log "Gems updated!!"
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fi
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if [[ -z $SKIP_DB_WAIT ]]; then
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wait_for_db
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fi
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if [[ -f $INIT_SEM ]]; then
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echo "#########################################################################"
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echo " "
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echo " App initialization skipped:"
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echo " Delete the file $INIT_SEM and restart the container to reinitialize"
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echo " You can alternatively run specific commands using docker-compose exec"
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echo " e.g docker-compose exec rails bundle exec rails db:migrate"
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echo " "
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echo "#########################################################################"
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else
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if [[ -z $SKIP_DB_SETUP ]]; then
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log "Configuring the database..."
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while ! bundle exec rails db:create; do
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counter=$((counter+1))
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if [ $counter == 30 ]; then
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log "Error: db:create failed"
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exit 1
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fi
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log "Trying to execute db:create. Attempt $counter."
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sleep 5
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done
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fi
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log "Initialization finished!!!"
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touch $INIT_SEM
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fi
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if [[ -z $SKIP_DB_SETUP ]]; then
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log "Applying database migrations (db:migrate)..."
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while ! bundle exec rails db:migrate; do
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counter=$((counter+1))
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if [ $counter == 30 ]; then
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log "Error: db:migrate failed"
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exit 1
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fi
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log "Trying to execute db:migrate. Attempt $counter."
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sleep 5
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done
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fi
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fi
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exec tini -- "$@"
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