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devel.go
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devel.go
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package databasetesting
import (
"context"
"fmt"
"github.com/jackc/pgx/v5"
"github.com/jackc/pgx/v5/pgxpool"
"github.com/TBD54566975/ftl/backend/controller/sql"
)
// CreateForDevel creates and migrates a new database for development or testing.
//
// If "recreate" is true, the database will be dropped and recreated.
func CreateForDevel(ctx context.Context, dsn string, recreate bool) (*pgxpool.Pool, error) {
config, err := pgx.ParseConfig(dsn)
if err != nil {
return nil, err
}
noDBDSN := config.Copy()
noDBDSN.Database = ""
conn, err := pgx.ConnectConfig(ctx, noDBDSN)
if err != nil {
return nil, err
}
defer conn.Close(ctx)
if recreate {
// Terminate any dangling connections.
_, err = conn.Exec(ctx, `
SELECT pid, pg_terminate_backend(pid)
FROM pg_stat_activity
WHERE datname = $1 AND pid <> pg_backend_pid()`,
config.Database)
if err != nil {
return nil, err
}
_, err = conn.Exec(ctx, fmt.Sprintf("DROP DATABASE IF EXISTS %q", config.Database))
if err != nil {
return nil, err
}
}
// PG doesn't support "IF NOT EXISTS" so instead we just ignore any error.
_, _ = conn.Exec(ctx, fmt.Sprintf("CREATE DATABASE %q", config.Database))
err = sql.Migrate(ctx, dsn)
if err != nil {
return nil, err
}
realConn, err := pgxpool.New(ctx, dsn)
if err != nil {
return nil, err
}
return realConn, nil
}