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db.go
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db.go
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package testutils
import (
"database/sql"
"fmt"
"os"
"os/exec"
"os/user"
)
var Quiet = false
func createLocalDB(dbName string) string {
if !Quiet {
fmt.Println("Note: tests require a postgres install accessible to the current user")
}
createDB := exec.Command("createdb", dbName)
if !Quiet {
createDB.Stdout = os.Stdout
createDB.Stderr = os.Stderr
}
createDB.Run()
return dbName
}
func currentUser() string {
user, err := user.Current()
if err != nil {
if !Quiet {
fmt.Println("cannot get current user: ", err)
}
os.Exit(2)
}
return user.Username
}
func PrepareDBConnectionString() (connStr string) {
// Required vars: user and db
// We'll try to infer from the local env if they are missing
user := os.Getenv("POSTGRES_USER")
if user == "" {
user = currentUser()
}
dbName := os.Getenv("POSTGRES_DB")
if dbName == "" {
dbName = createLocalDB("syncv3_test")
}
connStr = fmt.Sprintf(
"user=%s dbname=%s sslmode=disable",
user, dbName,
)
// optional vars, used in CI
password := os.Getenv("POSTGRES_PASSWORD")
if password != "" {
connStr += fmt.Sprintf(" password=%s", password)
}
host := os.Getenv("POSTGRES_HOST")
if host != "" {
connStr += fmt.Sprintf(" host=%s", host)
}
// Drop all tables on the database to get a fresh instance
db, err := sql.Open("postgres", connStr)
if err != nil {
panic(err)
}
_, err = db.Exec(`DROP SCHEMA public CASCADE;
CREATE SCHEMA public;`)
if err != nil {
panic(err)
}
db.Close()
return
}