Add ssh-agent-switcher: SSH agent proxy for tmux

ssh-agent-switcher is a daemon that proxies SSH agent connections to any valid
forwarded agent provided by sshd.  This allows long-lived processes such as
terminal multiplexers like `tmux` or `screen` to access the connection-specific
forwarded agents.

The ssh-agent-switcher daemon solves this problem by exposing an SSH agent
socket at a well-known location, allowing you to set `SSH_AUTH_SOCK` to a path
that does *not* change across different connections.  The daemon then looks for
a valid socket every time it receives a request and forwards the request to the
real forwarded agent.

Author: schmonz

sysutils/ssh-agent-switcher/DESCR

@@ -0,0 +1,10 @@
+ssh-agent-switcher is a daemon that proxies SSH agent connections to any valid
+forwarded agent provided by sshd.  This allows long-lived processes such as
+terminal multiplexers like `tmux` or `screen` to access the connection-specific
+forwarded agents.
+
+The ssh-agent-switcher daemon solves this problem by exposing an SSH agent
+socket at a well-known location, allowing you to set `SSH_AUTH_SOCK` to a path
+that does *not* change across different connections.  The daemon then looks for
+a valid socket every time it receives a request and forwards the request to the
+real forwarded agent.

sysutils/ssh-agent-switcher/Makefile

@@ -0,0 +1,23 @@
+# $NetBSD: Makefile,v 1.1 2023/11/17 21:00:05 schmonz Exp $
+
+DISTNAME=		${GITHUB_PROJECT}-${GITHUB_TAG}
+PKGNAME=		${GITHUB_PROJECT}-0.0.20231117
+CATEGORIES=		sysutils
+MASTER_SITES=		${MASTER_SITE_GITHUB:=jmmv/}
+GITHUB_PROJECT=		ssh-agent-switcher
+GITHUB_TAG=		3d5835ee0eeafdb2dd792f26d1decbed2c06dce8
+
+MAINTAINER=		schmonz@NetBSD.org
+HOMEPAGE=		https://github.com/jmmv/ssh-agent-switcher/
+COMMENT=		SSH agent proxy for tmux
+LICENSE=		modified-bsd
+
+USE_LANGUAGES=		c
+
+INSTALLATION_DIRS=	share/doc/${PKGBASE}
+
+post-install:
+	${INSTALL_DATA} ${WRKSRC}/README.md ${DESTDIR}${PREFIX}/share/doc/${PKGBASE}
+
+.include "../../lang/go/go-module.mk"
+.include "../../mk/bsd.pkg.mk"

sysutils/ssh-agent-switcher/PLIST

@@ -0,0 +1,3 @@
+@comment $NetBSD: PLIST,v 1.1 2023/11/17 21:00:05 schmonz Exp $
+bin/ssh-agent-switcher
+share/doc/ssh-agent-switcher/README.md

sysutils/ssh-agent-switcher/distinfo

@@ -0,0 +1,5 @@
+$NetBSD: distinfo,v 1.1 2023/11/17 21:00:05 schmonz Exp $
+
+BLAKE2s (ssh-agent-switcher-3d5835ee0eeafdb2dd792f26d1decbed2c06dce8-3d5835ee0eeafdb2dd792f26d1decbed2c06dce8.tar.gz) = 38b8b28617f987d6b81cee17c8450d610e1ee5f721babcab13133035d885c24f
+SHA512 (ssh-agent-switcher-3d5835ee0eeafdb2dd792f26d1decbed2c06dce8-3d5835ee0eeafdb2dd792f26d1decbed2c06dce8.tar.gz) = 2b3a3f59284dbf18dfaceb2df151e6b4ecd88dcd44dc389e09f3000bfa2de0aa3da58c036d8aa1dba8eb68f32e08f07bcc200f31847d8a145989d99236cf7377
+Size (ssh-agent-switcher-3d5835ee0eeafdb2dd792f26d1decbed2c06dce8-3d5835ee0eeafdb2dd792f26d1decbed2c06dce8.tar.gz) = 7399 bytes