diff --git a/.github/dependabot.yaml b/.github/dependabot.yaml
new file mode 100644
index 0000000..3924068
--- /dev/null
+++ b/.github/dependabot.yaml
@@ -0,0 +1,7 @@
+version: 2
+
+updates:
+ - package-ecosystem: gomod
+ directory: /
+ schedule:
+ interval: daily
\ No newline at end of file
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..6d880f2
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,26 @@
+name: CI
+
+on:
+ workflow_dispatch:
+ pull_request:
+ branches:
+ - main
+
+concurrency:
+ group: ${{ github.workflow }}-${{ github.ref }}
+ cancel-in-progress: true
+
+jobs:
+ test:
+ runs-on: ubuntu-latest
+ timeout-minutes: 10
+ steps:
+ - name: 📦 Checkout Repository
+ uses: actions/checkout@v3
+ - name: 🐁 Go Installation
+ uses: actions/setup-go@v2
+ with:
+ go-version: 1.21
+ - name: 🔬 Run Tests
+ run: go test -v -race -timeout=10m -cover ./...
+
diff --git a/README.md b/README.md
index 4c4a298..9dd50cf 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,34 @@
-# sdk
\ No newline at end of file
+
+
+ Prelude
+
+
+The **Prelude Package** is a lightweight and modular utility library for Golang, designed to provide a set of common functions and tools to kickstart your Golang projects. It's not meant to be an extensive framework but rather a collection of useful helpers that can be used as a prelude to your Golang code.
+
+## Installation
+
+To use this prelude package in your Golang project, you can simply run:
+
+```bash
+go get -u github.com/adoublef/prelude
+```
+
+## Additional Packages
+
+- [matryer/is](https://github.com/matryer/is) - Package is provides a lightweight extension to the standard library's testing capabilities.
+- [samber/lo](https://github.com/samber/lo) - A Lodash-style Go library.
+- [testcontainers](https://github.com/testcontainers/testcontainers-go) - Testcontainers is a package that makes it simple to create and clean up container-based dependencies for automated integration/smoke tests.
+
+## Contribution
+
+Contributions are welcome! If you have any ideas, bug fixes, or improvements, feel free to open an issue or submit a pull request.
+
+1. Fork the repository
+2. Create your feature branch (`git checkout -b feature/new-feature`)
+3. Commit your changes (`git commit -m 'Add new feature'`)
+4. Push to the branch (`git push origin feature/new-feature`)
+5. Open a pull request
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
diff --git a/Taskfile.yaml b/Taskfile.yaml
new file mode 100644
index 0000000..ba41cd0
--- /dev/null
+++ b/Taskfile.yaml
@@ -0,0 +1,12 @@
+version: 3
+
+tasks:
+ default:
+ desc: list all
+ cmds:
+ - task --list-all
+
+ test:
+ desc: test runner
+ cmds:
+ - go test -v -count 1 {{.CLI_ARGS}}
\ No newline at end of file
diff --git a/bytest/reader.go b/bytest/reader.go
new file mode 100644
index 0000000..b1bb60a
--- /dev/null
+++ b/bytest/reader.go
@@ -0,0 +1,43 @@
+// source https://medium.com/@nicksoetaert/using-io-reader-to-simulate-an-arbitrary-sized-file-in-golang-4df6287cae51
+package bytest
+
+import (
+ "io"
+)
+
+const (
+ B = 1 << (10 * iota)
+ KB
+ MB
+ GB // 1048576000 1073741824
+)
+
+func NewReader(n int) *Reader {
+ return &Reader{n: n}
+}
+
+// Reader simulates a fake read-only file of an arbitrary size.
+// The contents of this file cycles through the lowercase alphabetical ascii characters (abcdefghijklmnopqrstuvwxyz)
+// Data is generated as requested, so it is safe to generate a 100GB file with 1GB of memory free on your machine.
+type Reader struct {
+ n int
+ off int
+}
+
+// Read reads lowercase ascii characters into b from f.
+// n is number of bytes read.
+// If a Read is attempted at the end of the file, io.EOF is returned.
+func (r *Reader) Read(p []byte) (n int, err error) {
+ if r.n == r.off {
+ return 0, io.EOF
+ }
+ m := len(p)
+ if (r.n - r.off) < m {
+ m = r.n - r.off
+ }
+ for i := 0; i < m; i++ {
+ p[i] = byte('a' + (r.off+i)%26)
+ }
+ r.off += m
+ return m, nil
+}
diff --git a/bytest/reader_test.go b/bytest/reader_test.go
new file mode 100644
index 0000000..21488d0
--- /dev/null
+++ b/bytest/reader_test.go
@@ -0,0 +1,35 @@
+package bytest_test
+
+import (
+ "io"
+ "testing"
+
+ "github.com/adoublef/sdk/bytest"
+ "github.com/matryer/is"
+)
+
+func TestReader(t *testing.T) {
+ t.Parallel()
+
+ tt := []struct {
+ name string
+ r *bytest.Reader
+ n int
+ }{
+ {
+ name: "1024 Bytes",
+ r: bytest.NewReader(bytest.KB),
+ n: bytest.KB,
+ },
+ }
+
+ for _, tc := range tt {
+ t.Run(tc.name, func(t *testing.T) {
+ is := is.NewRelaxed(t)
+
+ n, err := io.ReadAll(tc.r)
+ is.NoErr(err) // read all
+ is.Equal(len(n), tc.n)
+ })
+ }
+}
diff --git a/errgroup/group.go b/errgroup/group.go
new file mode 100644
index 0000000..10e8c1d
--- /dev/null
+++ b/errgroup/group.go
@@ -0,0 +1,43 @@
+package errgroup
+
+import (
+ "context"
+ "os/signal"
+ "syscall"
+
+ "golang.org/x/sync/errgroup"
+)
+
+// A Group is a collection of goroutines working on subtasks that are part of the same overall task.
+type Group struct {
+ g *errgroup.Group
+ ctx context.Context
+}
+
+// A New Group with a shared Context
+func New(ctx context.Context, funcs ...func(context.Context) error) *Group {
+ g := &Group{}
+ g.g, g.ctx = errgroup.WithContext(ctx)
+ g.Go(funcs...)
+ return g
+}
+
+// Go calls the given function in a new goroutine. It blocks until the new goroutine can be added without the number of active goroutines in the group exceeding the configured limit.
+func (g *Group) Go(funcs ...func(context.Context) error) {
+ for _, f := range funcs {
+ fn := f
+ g.g.Go(func() error {
+ return fn(g.ctx)
+ })
+ }
+}
+
+// Wait blocks until all function calls from the Go method have returned, then returns the first non-nil error (if any) from them.
+func (g *Group) Wait() error {
+ return g.g.Wait()
+}
+
+// NotifyContext returns a copy of the parent context that is marked done when one of the listed signals arrives
+func NotifyContext(ctx context.Context) (context.Context, context.CancelFunc) {
+ return signal.NotifyContext(ctx, syscall.SIGTERM, syscall.SIGINT)
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..47c010e
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,10 @@
+module github.com/adoublef/sdk
+
+go 1.21.3
+
+require (
+ github.com/maragudk/migrate v0.4.3
+ github.com/matryer/is v1.4.1
+ github.com/mattn/go-sqlite3 v1.14.18
+ golang.org/x/sync v0.5.0
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..5beacd1
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,468 @@
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+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
+gopkg.in/inconshreveable/log15.v2 v2.0.0-20180818164646-67afb5ed74ec/go.mod h1:aPpfJ7XW+gOuirDoZ8gHhLh3kZ1B08FtV2bbmy7Jv3s=
+gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
+sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=
diff --git a/http/fs/fs.go b/http/fs/fs.go
new file mode 100644
index 0000000..f2ce235
--- /dev/null
+++ b/http/fs/fs.go
@@ -0,0 +1,47 @@
+package fs
+
+import (
+ "fmt"
+ "io/fs"
+ "os"
+)
+
+var _ fs.FS = (FS{})
+
+// An FS provides access to a hierarchical file system.
+type FS struct {
+ fsys fs.FS
+}
+
+// Must panics if there is an error returning the subtree
+func Must(fsys fs.FS, name string) FS {
+ f, err := Sub(fsys, name)
+ if err != nil {
+ panic(err)
+ }
+ return f
+}
+
+// Sub returns an FS corresponding to the subtree rooted at fsys's dir.
+func Sub(fsys fs.FS, name string) (FS, error) {
+ f, err := fs.Sub(fsys, name)
+ if err != nil {
+ return FS{}, fmt.Errorf("sub: %w", err)
+ }
+ return FS{fsys: f}, nil
+}
+
+// Open tries to open the file with the supplied name. If not found retires with `.html` extension
+func (fsys FS) Open(name string) (fs.File, error) {
+ f, err := fsys.fsys.Open(name)
+ if os.IsNotExist(err) {
+ if f, err := fsys.fsys.Open(name + ".html"); err == nil {
+ return f, nil
+ }
+ }
+ return f, err
+}
+
+func NewFS(fsys fs.FS) *FS {
+ return &FS{fsys: fsys}
+}
diff --git a/http/fs/fs_test.go b/http/fs/fs_test.go
new file mode 100644
index 0000000..174901f
--- /dev/null
+++ b/http/fs/fs_test.go
@@ -0,0 +1,26 @@
+package fs_test
+
+import (
+ "embed"
+ "testing"
+
+ "github.com/adoublef/sdk/http/fs"
+ "github.com/matryer/is"
+)
+
+//go:embed all:testdata
+var embedFS embed.FS
+
+// var fsys = fs.Must(embedFS, "testdata")
+
+func TestFS(t *testing.T) {
+ t.Run("sub-root of file system", func(t *testing.T) {
+ is := is.New(t)
+
+ fs, err := fs.Sub(embedFS, "testdata")
+ is.NoErr(err) // subtree of embedded file system
+
+ _, err = fs.Open("a")
+ is.NoErr(err) // open file `a.html` using the filename
+ })
+}
diff --git a/http/fs/testdata/a.html b/http/fs/testdata/a.html
new file mode 100644
index 0000000..e69de29
diff --git a/http/server.go b/http/server.go
new file mode 100644
index 0000000..b9257ca
--- /dev/null
+++ b/http/server.go
@@ -0,0 +1,44 @@
+package http
+
+import (
+ "context"
+ "errors"
+ "fmt"
+ "net/http"
+ "time"
+)
+
+const (
+ timeout = 5 *time.Second
+)
+
+type Server struct {
+ s *http.Server
+}
+
+// ListenAndServe listens on the TCP network address and then handles requests on incoming connections.
+func (s *Server) ListenAndServe() error {
+ err := s.s.ListenAndServe()
+ if err != nil && !errors.Is(err, http.ErrServerClosed) {
+ return fmt.Errorf("http listen and serve: %w", err)
+ }
+ return nil
+}
+
+// Shutdown gracefully shuts down the server without interrupting any active connections.
+func (s *Server) Shutdown() error {
+ ctx, cancel := context.WithTimeout(context.Background(), timeout)
+ defer cancel()
+
+ err := s.s.Shutdown(ctx)
+ if err != nil && !errors.Is(err, http.ErrServerClosed) {
+ return fmt.Errorf("http shutdown: %w", err)
+ }
+ return nil
+}
+
+// A New Server defines parameters for running an HTTP server.
+func NewServer(addr string, h http.Handler) *Server {
+ s := &http.Server{Addr: addr, Handler: h}
+ return &Server{s}
+}
diff --git a/net/port.go b/net/port.go
new file mode 100644
index 0000000..bacf9ab
--- /dev/null
+++ b/net/port.go
@@ -0,0 +1,19 @@
+package net
+
+import (
+ "fmt"
+ "net"
+)
+
+// Next will return the next freely available tcp port
+func Next() int {
+ l, err := net.Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ if l, err = net.Listen("tcp6", "[::1]:0"); err != nil {
+ panic(fmt.Sprintf("net: failed to listen on a port: %v", err))
+ }
+ }
+ defer l.Close()
+
+ return l.Addr().(*net.TCPAddr).Port
+}
diff --git a/rand/rand.go b/rand/rand.go
new file mode 100644
index 0000000..fe08033
--- /dev/null
+++ b/rand/rand.go
@@ -0,0 +1,43 @@
+package rand
+
+import (
+ "math/rand"
+ "time"
+ "unsafe"
+)
+
+var src = rand.NewSource(time.Now().UnixNano())
+
+const (
+ set = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ bits = 6 // 6 bits to represent a letter index
+ mask = 1<= 0; {
+ if remain == 0 {
+ cache, remain = src.Int63(), max
+ }
+ if idx := int(cache & mask); idx < len(set) {
+ b[i] = set[idx]
+ i--
+ }
+ cache >>= bits
+ remain--
+ }
+
+ return b
+}
+
+// String returns a random string of length n
+func String(n int) string {
+ b := Bytes(n)
+ return *(*string)(unsafe.Pointer(&b)) // equiv. string(b)
+}
+
+// TODO var Reader
diff --git a/sql/1.up.sql b/sql/1.up.sql
new file mode 100644
index 0000000..a915859
--- /dev/null
+++ b/sql/1.up.sql
@@ -0,0 +1,5 @@
+CREATE TABLE t (
+ a INT
+);
+
+INSERT INTO t (a) VALUES (1);
\ No newline at end of file
diff --git a/sql/db.go b/sql/db.go
new file mode 100644
index 0000000..4cb0ae1
--- /dev/null
+++ b/sql/db.go
@@ -0,0 +1,153 @@
+package sql
+
+import (
+ "context"
+ "database/sql"
+ "fmt"
+ "io"
+ "io/fs"
+
+ "github.com/maragudk/migrate"
+ _ "github.com/mattn/go-sqlite3"
+)
+
+const (
+ driverName = "sqlite3"
+ args = "_fk=true&_journal_mod=wal&_synchronous=normal&_timeout=5000"
+)
+
+var _ ReadWriter = (*DB)(nil)
+
+type DB struct {
+ rwc *sql.DB
+}
+
+func (db *DB) Begin() (*Tx, error) {
+ tx, err := db.rwc.Begin()
+ if err != nil {
+ return nil, fmt.Errorf("begin transactions: %w", err)
+ }
+ return &Tx{tx}, nil
+}
+
+// Query implements DB.
+func (db *DB) Query(ctx context.Context, query string, args ...any) (ScanIterator, error) {
+ rs, err := db.rwc.QueryContext(ctx, query, args...)
+ if err != nil {
+ return nil, fmt.Errorf("query: %w", err)
+ }
+ return rs, nil
+}
+
+// Exec executes a query without returning any rows.
+func (db *DB) Exec(ctx context.Context, query string, args ...any) (int64, error) {
+ rs, err := db.rwc.ExecContext(ctx, query, args...)
+ if err != nil {
+ return 0, fmt.Errorf("execute: %w", err)
+ }
+ n, err := rs.RowsAffected()
+ if err != nil {
+ return 0, fmt.Errorf("rows affected: %w", err)
+ }
+ return n, nil
+}
+
+// QueryRow executes a query that is expected to return at most one row.
+func (db *DB) QueryRow(ctx context.Context, query string, args ...any) Scanner {
+ return db.rwc.QueryRowContext(ctx, query, args...)
+}
+
+// Close closes the database and prevents new queries from starting. C
+func (db *DB) Close() error {
+ return db.rwc.Close()
+}
+
+// Open opens a database connection for the given sqlite file.
+func Open(dsn string) (*DB, error) {
+ db, err := sql.Open(driverName, dsn+"?"+args)
+ if err != nil {
+ return nil, fmt.Errorf("open sqlite3: %w", err)
+ }
+ return &DB{db}, nil
+}
+
+type Scanner interface {
+ Err() error
+ Scan(dest ...any) error
+}
+
+type ScanIterator interface {
+ io.Closer
+ Scanner
+ Next() bool
+}
+
+// Up from the current version.
+func Up(ctx context.Context, db *DB, fsys fs.FS) error {
+ err := migrate.Up(ctx, db.rwc, fsys)
+ if err != nil {
+ return fmt.Errorf("migrate up: %w", err)
+ }
+ return nil
+}
+
+var _ ReadWriter = (*Tx)(nil)
+
+type Tx struct {
+ rwc *sql.Tx
+}
+
+// Rollback aborts the transaction.
+func (tx *Tx) Rollback() error {
+ return tx.rwc.Rollback()
+}
+
+// Commit commits the transaction.
+func (tx *Tx) Commit() error {
+ return tx.rwc.Commit()
+}
+
+// Exec executes a query without returning any rows.
+func (tx *Tx) Exec(ctx context.Context, query string, args ...any) (int64, error) {
+ rs, err := tx.rwc.ExecContext(ctx, query, args...)
+ if err != nil {
+ return 0, fmt.Errorf("execute: %w", err)
+ }
+ n, err := rs.RowsAffected()
+ if err != nil {
+ return 0, fmt.Errorf("rows affected: %w", err)
+ }
+ return n, nil
+}
+
+// Query implements Tx.
+func (tx *Tx) Query(ctx context.Context, query string, args ...any) (ScanIterator, error) {
+ rs, err := tx.rwc.QueryContext(ctx, query, args...)
+ if err != nil {
+ return nil, fmt.Errorf("query: %w", err)
+ }
+ return rs, nil
+}
+
+// QueryRow executes a query that is expected to return at most one row.
+func (tx *Tx) QueryRow(ctx context.Context, query string, args ...any) Scanner {
+ return tx.rwc.QueryRowContext(ctx, query, args...)
+}
+
+type ReadWriter interface {
+ Reader
+ Writer
+}
+
+type Writer interface {
+ Exec(ctx context.Context, query string, args ...any) (rowsAffected int64, err error)
+}
+
+type Reader interface {
+ Query(ctx context.Context, query string, args ...any) (ScanIterator, error)
+ QueryRow(ctx context.Context, query string, args ...any) Scanner
+}
+
+var (
+ ErrNoRows = sql.ErrNoRows
+)
diff --git a/sql/db_test.go b/sql/db_test.go
new file mode 100644
index 0000000..1752435
--- /dev/null
+++ b/sql/db_test.go
@@ -0,0 +1,69 @@
+package sql_test
+
+import (
+ "context"
+ "embed"
+ "fmt"
+ "testing"
+
+ "github.com/adoublef/sdk/sql"
+ st "github.com/adoublef/sdk/sql/sqltest"
+ "github.com/matryer/is"
+)
+
+//go:embed all:*.up.sql
+var fsys embed.FS
+
+func TestSQL(t *testing.T) {
+ t.Run("query", st.RoundTrip(fsys, func(t testing.TB, db *sql.DB) {
+ var (
+ is = is.New(t)
+ ctx = context.Background()
+ err error
+ )
+
+ err = db.QueryRow(ctx, "SELECT * FROM t WHERE t.a = 1").Err()
+ is.NoErr(err) // exists
+
+ var n int
+ err = db.QueryRow(ctx, "SELECT * FROM t WHERE t.a = 2").Scan(&n)
+ is.Equal(err, sql.ErrNoRows) // not exist
+
+ var ok bool
+ err = db.QueryRow(ctx, "SELECT EXISTS (SELECT * FROM t WHERE t.a = 1)").Scan(&ok)
+ is.NoErr(err) // query
+ is.Equal(ok, true) // exists
+
+ var bad bool
+ err = db.QueryRow(ctx, fmt.Sprintf("SELECT EXISTS (%s)", "SELECT * FROM t WHERE t.a = 2")).Scan(&bad)
+ is.NoErr(err) // query
+ is.Equal(bad, false) // does not exists
+ }))
+
+ t.Run("tx.query", st.RoundTrip(fsys, func(t testing.TB, db *sql.DB) {
+ var (
+ is = is.New(t)
+ ctx = context.Background()
+ tx, err = db.Begin()
+ )
+ is.NoErr(err) // tx
+ defer tx.Rollback()
+
+ err = tx.QueryRow(ctx, "SELECT * FROM t WHERE t.a = 1").Err()
+ is.NoErr(err) // exists
+
+ var n int
+ err = tx.QueryRow(ctx, "SELECT * FROM t WHERE t.a = 2").Scan(&n)
+ is.Equal(err, sql.ErrNoRows) // not exist
+
+ var ok bool
+ err = tx.QueryRow(ctx, "SELECT EXISTS (SELECT * FROM t WHERE t.a = 1)").Scan(&ok)
+ is.NoErr(err) // query
+ is.Equal(ok, true) // exists
+
+ var bad bool
+ err = tx.QueryRow(ctx, fmt.Sprintf("SELECT EXISTS (%s)", "SELECT * FROM t WHERE t.a = 2")).Scan(&bad)
+ is.NoErr(err) // query
+ is.Equal(bad, false) // does not exists
+ }))
+}
diff --git a/sql/julian/time.go b/sql/julian/time.go
new file mode 100644
index 0000000..1771f14
--- /dev/null
+++ b/sql/julian/time.go
@@ -0,0 +1,26 @@
+package julian
+
+import (
+ "time"
+)
+
+const (
+ DaySeconds = 86400
+ UnixEpochJulianDay = 2440587.5
+)
+
+type Time float64
+
+// AsTime converts a Julian day into a time.Time.
+func (t Time) AsTime() time.Time {
+ return time.Unix(int64((t-UnixEpochJulianDay)*DaySeconds), 0).UTC()
+}
+
+// FromTime converts a time.Time into a Julian day.
+func FromTime(t time.Time) Time {
+ return Time(float64(t.UTC().Unix())/DaySeconds + UnixEpochJulianDay)
+}
+
+func Now() Time {
+ return FromTime(time.Now())
+}
diff --git a/sql/sqltest/db.go b/sql/sqltest/db.go
new file mode 100644
index 0000000..a90e2cb
--- /dev/null
+++ b/sql/sqltest/db.go
@@ -0,0 +1,26 @@
+package sqltest
+
+import (
+ "context"
+ "io/fs"
+ "path/filepath"
+ "testing"
+
+ "github.com/adoublef/sdk/sql"
+)
+
+// RoundTrip will create a database instance to use with testing
+func RoundTrip(fsys fs.FS, f func(t testing.TB, db *sql.DB)) func(t *testing.T) {
+ return func(t *testing.T) {
+ dsn := filepath.Join(t.TempDir(), "test.db")
+ db, err := sql.Open(dsn)
+ if err != nil {
+ t.Fatalf("open connection: %v", err)
+ }
+ defer db.Close()
+ if err := sql.Up(context.Background(), db, fsys); err != nil {
+ t.Fatalf("run migrations: %v", err)
+ }
+ f(t, db)
+ }
+}
diff --git a/template/fs.go b/template/fs.go
new file mode 100644
index 0000000..2cf655e
--- /dev/null
+++ b/template/fs.go
@@ -0,0 +1,61 @@
+package template
+
+import (
+ "errors"
+ "html/template"
+ "io"
+ "io/fs"
+ "maps"
+ "net/http"
+)
+
+// An FS provides access to a file system that produces a safe HTML document templates.
+type FS struct {
+ fsys fs.FS
+ funcs template.FuncMap
+}
+
+var ErrParseTemplate = errors.New("template: parse template files")
+
+// Parse parses the named files and associates the resulting templates with t
+func (fsys *FS) Parse(filenames ...string) (Template, error) {
+ t, err := template.New(filenames[0]).Funcs(fsys.funcs).ParseFS(fsys.fsys, filenames...)
+ if err != nil {
+ return nil, errors.Join(ErrParseTemplate, err)
+ }
+ return t, nil
+}
+
+// MustParse will panic if unable to parse files
+func (fsys *FS) MustParse(filenames ...string) Template {
+ t, err := fsys.Parse(filenames...)
+ if err != nil {
+ panic(err)
+ }
+ return t
+}
+
+// Funcs adds the elements of the argument map to the template's function map.
+func (fsys *FS) Funcs(funcs ...template.FuncMap) *FS {
+ for _, f := range funcs {
+ maps.Copy(fsys.funcs, f)
+ }
+ return fsys
+}
+
+// NewFS allocates a new file system for templates
+func NewFS(fsys fs.FS) *FS {
+ return &FS{fsys: fsys, funcs: make(template.FuncMap)}
+}
+
+type Template interface {
+ // Execute applies a parsed template to the specified data object, writing the output to wr
+ Execute(wr io.Writer, data any) error
+}
+
+func ExecuteHTTP(w http.ResponseWriter, t Template, data any) {
+ err := t.Execute(w, data)
+ if err != nil {
+ http.Error(w, "unable to render html", http.StatusUnprocessableEntity)
+ }
+}
\ No newline at end of file