From 6c0f2d98a3007e27fb235779b9af3f90a0baf652 Mon Sep 17 00:00:00 2001
From: Shin'ya Minazuki <shinyoukai@laidback.moe>
Date: Thu, 4 Dec 2025 23:01:14 +0900
Subject: [PATCH] Shin'ya M. > Initializing repository with 4 items... done

---
 COPYING   | 22 +++++++++++++++++++++
 README.md |  9 +++++++++
 git2svn   | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 svn2git   | 20 +++++++++++++++++++
 4 files changed, 109 insertions(+)
 create mode 100644 COPYING
 create mode 100644 README.md
 create mode 100644 git2svn
 create mode 100644 svn2git

diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..63454f2
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,22 @@
+  ________  ________
+ /_  __/ / / / ____/
+  / / / /_/ / __/
+ / / / __  / /___
+/_/ /_/ /_/_____/
+
+    ____  ________________      _       _____    ____  ______
+   / __ )/ ____/ ____/ __ \    | |     / /   |  / __ \/ ____/
+  / __  / __/ / __/ / /_/ /____| | /| / / /| | / /_/ / __/
+ / /_/ / /___/ /___/ _, _/_____/ |/ |/ / ___ |/ _, _/ /___
+/_____/_____/_____/_/ |_|      |__/|__/_/  |_/_/ |_/_____/
+
+    __    _________________   _______ ______
+   / /   /  _/ ____/ ____/ | / / ___// ____/
+  / /    / // /   / __/ /  |/ /\__ \/ __/
+ / /____/ // /___/ /___/ /|  /___/ / /___
+/_____/___/\____/_____/_/ |_//____/_____/
+
+Shin'ya Minazuki <shinyoukai@laidback.moe> wrote this file. 
+As long as you retain this notice you can do whatever you want with this stuff.
+If we meet some day, and you think this stuff is worth it, you can buy me a bottle of sake
+in return.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ecd39e7
--- /dev/null
+++ b/README.md
@@ -0,0 +1,9 @@
+# repository-conversion-scripts
+Simple executable files to migrate repositories from one version control system to another.
+
+Those require a rather old version of [reposurgeon](http://catb.org/~esr/reposurgeon), as the latest one may not work
+on some systems (such as [NetBSD](https://www.netbsd.org)).
+
+## Scripts
+* [Git to Subversion](git2svn) (in [Perl](https://www.perl.org))
+* [Subversion to Git](svn2git)
diff --git a/git2svn b/git2svn
new file mode 100644
index 0000000..2d45d51
--- /dev/null
+++ b/git2svn
@@ -0,0 +1,58 @@
+#!/bin/sh
+
+clean() {
+    rm -rf ${1}.fi ${1}.fo ${1}.lift ${1}.map ${1}.opts
+}
+git_export() {
+    (cd ${1}-mirror ; repotool export) >${2}.git
+}
+
+git_mirror() {
+    repotool mirror ${1} ${2}-mirror
+}
+
+prepare() {
+    touch ${1}.opts
+    touch ${1}.map
+    touch ${1}.lift
+}
+
+svn_import() {
+    reposurgeon "script ${2}.opts" \
+		"read <${2}.git" \
+		"authors read <${2}.map" \
+		"sourcetype git" \
+		"prefer git" \
+		"script ${2}.lift" \
+		"legacy write >${2}.fo" \
+		"write >${2}.fi"
+
+    reposurgeon "read <${2}.fi" \
+		"prefer svn" \
+		"rebuild ${repo_name}-svn"
+    
+}
+
+print_usage() {
+    printf "usage: %s [export dir file] [mirror url repo_name] [migrate repo_name]\n" "$0"
+    printf "this program requires reposurgeon 3.41\n"
+    exit 1
+}
+
+case $1 in
+    export)
+	git_export $2 $3
+	;;
+    mirror)
+	git_mirror $2 $3
+	;;
+    migrate)
+	prepare $2
+	svn_import $2
+	clean $2
+	;;
+    *)
+	print_usage
+	;;
+esac
+    
diff --git a/svn2git b/svn2git
new file mode 100644
index 0000000..b8deb48
--- /dev/null
+++ b/svn2git
@@ -0,0 +1,20 @@
+#!/usr/bin/env perl
+# Convert SVN repositories to Git
+# Requirements:
+# - git
+# - reposurgeon
+# - svn
+# - direct access to the subversion server
+use warnings;
+use strict;
+
+require("./svn2git.conf");
+
+my $subversion_repo_path;
+my $git_repo_path;
+my $repo_name;
+
+print "Dumping the SVN repository: ($repo_name)\n";
+system("svnadmin dump $subversion_repo_path > $repo_name.dump") or die "Either svnadmin is not installed or there was a runtime error";
+print "Converting the repository into Git ($repo_name)\n";
+system("reposurgeon 'read <$repo_name.dump' 'prefer git' 'rebuild $git_repo_path'") or die "Either reposurgeon is not installed or there was a runtime error";