internal: add license flag

1 files changed, 40 insertions, 0 deletions

diff --git a/internal/internal.go b/internal/internal.go
new file mode 100644
index 0000000..f21624e
--- /dev/null
+++ b/internal/internal.go
@@ -0,0 +1,40 @@
+package internal
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/Xe/x/tools/license/licenses"
+	"go4.org/legal"
+)
+
+var (
+	licenseShow = flag.Bool("license", false, "show software license?")
+)
+
+func init() {
+	legal.RegisterLicense(licenses.CC0License)
+	legal.RegisterLicense(licenses.SQLiteBlessing)
+
+	http.HandleFunc("/.within/licenses", func(w http.ResponseWriter, r *http.Request) {
+		json.NewEncoder(w).Encode(legal.Licenses())
+	})
+}
+
+// HandleLicense optionally shows all software licenses.
+func HandleLicense() {
+	if *licenseShow {
+		log.Printf("Licenses for %v", os.Args)
+
+		for _, li := range legal.Licenses() {
+			fmt.Println(li)
+			fmt.Println()
+		}
+
+		os.Exit(0)
+	}
+}