feat: rsync-docker as first-party code, configureable strict host keys checking

docker-rsync/agent-add

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+set -euo pipefail
+
+source agent-start "${1:-default}"
+cat - | tr -d '\r' | DISPLAY=1 SSH_ASKPASS=agent-askpass ssh-add - >/dev/null

docker-rsync/agent-askpass

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -euo pipefail
+
+echo "$SSH_PASS"

docker-rsync/agent-start

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+set -euo pipefail
+
+FOLDER=${1:-default}
+STORE_PATH="/tmp/ssh-agent/$FOLDER"
+mkdir -p "$STORE_PATH"
+
+if [ -z "$SSH_AGENT_PID" ]; then
+	if [ -f "$STORE_PATH/id" ]; then
+		SSH_AGENT_PID=$(cat "$STORE_PATH/id")
+		export SSH_AGENT_PID
+
+		SSH_AUTH_SOCK=$(cat "$STORE_PATH/sock")
+		export SSH_AUTH_SOCK
+	else
+		eval "$(ssh-agent)" > /dev/null
+		echo "$SSH_AGENT_PID" > "$STORE_PATH"/id
+		echo "$SSH_AUTH_SOCK" > "$STORE_PATH"/sock
+	fi
+fi

docker-rsync/agent-stop

@@ -0,0 +1,37 @@
+#!/bin/sh
+
+set -euo pipefail
+
+if [ ! -z "$SSH_AGENT_PID" ]; then
+	# Here, the environment is set already, just kill the script.
+	eval $(ssh-agent -k) >/dev/null
+	exit $?
+else
+	# The env isn't set, construct the file path.
+	FOLDER=${1:-default}
+	STORE_PATH="/tmp/ssh-agent/$FOLDER"
+	if [ ! -d "$STORE_PATH" ]; then
+		echo "Store Path $STORE_PATH doesn't exist!" >&2
+		exit 1
+	fi
+
+	# And check our files exist.
+	if [ -f "$STORE_PATH/id" ]; then
+		# Grab our PID and socket.
+		SSH_AGENT_PID=$(cat "$STORE_PATH/id")
+		export SSH_AGENT_PID
+		rm "$STORE_PATH/id"
+
+		SSH_AUTH_SOCK=$(cat "$STORE_PATH/sock")
+		export SSH_AUTH_SOCK
+		rm "$STORE_PATH/sock"
+
+
+		rmdir "$STORE_PATH"
+		eval $(ssh-agent -k) >/dev/null
+		exit $?
+	else
+		echo "SSH_AGENT_PID not set, $STORE_PATH/id doesn't exist!" >&2
+		exit 1
+	fi
+fi

docker-rsync/ssh-init

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -euo pipefail
+
+mkdir -m 700 ~/.ssh