Merge commit '47d4dcf042f5ec927d592f03964cd12aab2bb66f' as 'backend/go-sqlite3'

backend/go-sqlite3/_example/simple/Dockerfile

@@ -0,0 +1,47 @@
+# =============================================================================
+#  Multi-stage Dockerfile Example
+# =============================================================================
+#  This is a simple Dockerfile that will build an image of scratch-base image.
+#  Usage:
+#    docker build -t simple:local . && docker run --rm simple:local
+# =============================================================================
+
+# -----------------------------------------------------------------------------
+#  Build Stage
+# -----------------------------------------------------------------------------
+FROM golang:alpine3.18 AS build
+
+# Important:
+#   Because this is a CGO enabled package, you are required to set it as 1.
+ENV CGO_ENABLED=1
+
+RUN apk add --no-cache \
+    # Important: required for go-sqlite3
+    gcc \
+    # Required for Alpine
+    musl-dev
+
+WORKDIR /workspace
+
+COPY . /workspace/
+
+RUN \
+    cd _example/simple && \
+    go mod init github.com/mattn/sample && \
+    go mod edit -replace=github.com/mattn/go-sqlite3=../.. && \
+    go mod tidy && \
+    go install -ldflags='-s -w -extldflags "-static"' ./simple.go
+
+RUN \
+    # Smoke test
+    set -o pipefail; \
+    /go/bin/simple | grep 99\ こんにちは世界099
+
+# -----------------------------------------------------------------------------
+#  Main Stage
+# -----------------------------------------------------------------------------
+FROM scratch
+
+COPY --from=build /go/bin/simple /usr/local/bin/simple
+
+ENTRYPOINT [ "/usr/local/bin/simple" ]

backend/go-sqlite3/_example/simple/simple.go

@@ -0,0 +1,109 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	_ "github.com/mattn/go-sqlite3"
+	"log"
+	"os"
+)
+
+func main() {
+	os.Remove("./foo.db")
+
+	db, err := sql.Open("sqlite3", "./foo.db")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	sqlStmt := `
+	create table foo (id integer not null primary key, name text);
+	delete from foo;
+	`
+	_, err = db.Exec(sqlStmt)
+	if err != nil {
+		log.Printf("%q: %s\n", err, sqlStmt)
+		return
+	}
+
+	tx, err := db.Begin()
+	if err != nil {
+		log.Fatal(err)
+	}
+	stmt, err := tx.Prepare("insert into foo(id, name) values(?, ?)")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer stmt.Close()
+	for i := 0; i < 100; i++ {
+		_, err = stmt.Exec(i, fmt.Sprintf("こんにちは世界%03d", i))
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+	err = tx.Commit()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	rows, err := db.Query("select id, name from foo")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var id int
+		var name string
+		err = rows.Scan(&id, &name)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Println(id, name)
+	}
+	err = rows.Err()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	stmt, err = db.Prepare("select name from foo where id = ?")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer stmt.Close()
+	var name string
+	err = stmt.QueryRow("3").Scan(&name)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(name)
+
+	_, err = db.Exec("delete from foo")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	_, err = db.Exec("insert into foo(id, name) values(1, 'foo'), (2, 'bar'), (3, 'baz')")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	rows, err = db.Query("select id, name from foo")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var id int
+		var name string
+		err = rows.Scan(&id, &name)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Println(id, name)
+	}
+	err = rows.Err()
+	if err != nil {
+		log.Fatal(err)
+	}
+}