replace zxq.co/ripple/hanayo

vendor/zxq.co/ripple/agplwarning/agplwarning.go

@@ -0,0 +1,82 @@
+package agplwarning
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"os/user"
+	"strings"
+)
+
+var pages = [...]string{
+	`This is a friendly reminder that the GNU AGPL adds an additional clause to
+the standard GNU GPL, which is that you MUST distribute the source code for the
+software once you publish it on the web.
+    This is not to be considered professional legal advice. For further
+information, refer to the LICENSE file which contains the whole license, or ask
+your lawyer. If you did not receive a copy of the LICENSE file with this
+software, you can refer to the online version:
+    https://www.gnu.org/licenses/agpl-3.0.html`,
+	`In order to comply with the license, should you have made any modification
+to the original copy of the software, which should contain a link to the
+source code, however minor it is, you are under the legal obligation to provide
+the source code once you publish the software on the Web.
+    Another obligation is that of stating your changes. This is usually done by
+cloning the original git repository of the project and stating your changes
+through the creation of commits, which allow us to determine when a specific
+change was done.`,
+	`Furthermore, all the original clauses of the GNU General Public License
+are kept intact, which means you have the obligation to
+    * Keep the AGPL License, without possibility of sublicensing the software
+      or making it available under any other more liberal license.
+    * Keep the copyright notice of the original authors
+    Failure to do so will result in a request to follow the License, and
+repeated violation of the license could result in a legal fight.`,
+	`For more information on the FSF and software freedom, refer to:
+    * What is free software? https://www.gnu.org/philosophy/free-sw.html
+    * Free Software Is Even More Important Now
+      https://www.gnu.org/philosophy/free-software-even-more-important.html
+    * The GNU operating system https://www.gnu.org
+    * The Free Software Foundation https://www.fsf.org
+    Thank you for reading this and following our license terms.`,
+}
+
+// Warn shows a warning about the GNU Affero General Public License the first
+// time the software is run. The state is saved in
+// ~/.config/[namespace]_license_agreed.
+func Warn(namespace, projectName string) error {
+	usr, err := user.Current()
+	if err != nil {
+		return fmt.Errorf("initialization of agplwarning failed: %v", err)
+	}
+	if err := os.MkdirAll(usr.HomeDir+"/.config", 0755); err != nil {
+		return fmt.Errorf("can't create config dir: %v", err)
+	}
+	agreedFilename := usr.HomeDir + "/.config/" + namespace + "_license_agreed"
+	if _, err := os.Stat(agreedFilename); !os.IsNotExist(err) {
+		return err
+	}
+	reader := bufio.NewReader(os.Stdin)
+	// file does not exist. Show warning.
+	fmt.Printf("    %s, and most/all software related to %s,\n"+
+		"is licensed under the GNU Affero General Public License.\n\n", projectName, namespace)
+	for _, page := range pages {
+		fmt.Println("    " + page)
+		fmt.Println("\nPress Enter to continue")
+		_, err := reader.ReadString('\n')
+		if err != nil {
+			return err
+		}
+	}
+	fmt.Println("Please write 'I agree' to accept the terms of the license.")
+	res, err := reader.ReadString('\n')
+	if err != nil || !strings.Contains(strings.ToLower(res), "i agree") {
+		fmt.Println("License not agreed. Quitting.")
+		os.Exit(1)
+	}
+	f, err := os.Create(agreedFilename)
+	if err != nil {
+		return fmt.Errorf("couldn't save read status: %v", err)
+	}
+	return f.Close()
+}