driver/sshdriver: read from tools

labgrid/driver/sshdriver.py

@@ -41,6 +41,15 @@ class SSHDriver(CommandMixin, Driver, CommandProtocol, FileTransferProtocol):
     def __attrs_post_init__(self):
         super().__attrs_post_init__()
         self._keepalive = None
+        self._ssh = self._get_tool("ssh")
+        self._scp = self._get_tool("scp")
+        self._sshfs = self._get_tool("sshfs")
+        self._rsync = self._get_tool("rsync")
+
+    def _get_tool(self, name):
+        if self.target.env:
+            return self.target.env.config.get_tool(name)
+        return name
 
     def _get_username(self):
         """Get the username from this class or from NetworkService"""
@@ -105,7 +114,7 @@ def _start_own_master_once(self, timeout):
             self.tmpdir, f'control-{self.networkservice.address}'
         )
 
-        args = ["ssh", "-f", *self.ssh_prefix, "-x", "-o", f"ConnectTimeout={timeout}",
+        args = [self._ssh, "-f", *self.ssh_prefix, "-x", "-o", f"ConnectTimeout={timeout}",
                  "-o", "ControlPersist=300", "-o",
                  "UserKnownHostsFile=/dev/null", "-o", "StrictHostKeyChecking=no",
                  "-o", "ServerAliveInterval=15", "-MN", "-S", control.replace('%', '%%'), "-p",
@@ -203,7 +212,7 @@ def _run(self, cmd, codec="utf-8", decodeerrors="strict", timeout=None):
         if not self._check_keepalive():
             raise ExecutionError("Keepalive no longer running")
 
-        complete_cmd = ["ssh", "-x", *self.ssh_prefix,
+        complete_cmd = [self._ssh, "-x", *self.ssh_prefix,
                         "-p", str(self.networkservice.port), "-l", self._get_username(),
                         self.networkservice.address
                         ] + cmd.split(" ")
@@ -238,7 +247,7 @@ def interact(self, cmd=None):
         if not self._check_keepalive():
             raise ExecutionError("Keepalive no longer running")
 
-        complete_cmd = ["ssh", "-x", *self.ssh_prefix,
+        complete_cmd = [self._ssh, "-x", *self.ssh_prefix,
                         "-t",
                         self.networkservice.address
                         ]
@@ -252,7 +261,7 @@ def interact(self, cmd=None):
 
     @contextlib.contextmanager
     def _forward(self, forward):
-        cmd = ["ssh", *self.ssh_prefix,
+        cmd = [self._ssh, *self.ssh_prefix,
                "-O", "forward", forward,
                self.networkservice.address
                ]
@@ -261,7 +270,7 @@ def _forward(self, forward):
         try:
             yield
         finally:
-            cmd = ["ssh", *self.ssh_prefix,
+            cmd = [self._ssh, *self.ssh_prefix,
                    "-O", "cancel", forward,
                    self.networkservice.address
                    ]
@@ -361,7 +370,8 @@ def scp(self, *, src, dst):
         if dst.startswith(':'):
             dst = '_' + dst
 
-        complete_cmd = ["scp",
+        complete_cmd = [self._scp,
+                "-S", self._ssh,
                 "-F", "none",
                 "-o", f"ControlPath={self.control.replace('%', '%%')}",
                 src, dst,
@@ -391,12 +401,12 @@ def rsync(self, *, src, dst, extra=[]):
         if dst.startswith(':'):
             dst = '_' + dst
 
-        ssh_cmd = ["ssh",
+        ssh_cmd = [self._ssh,
                 "-F", "none",
                 "-o", f"ControlPath={self.control.replace('%', '%%')}",
         ]
 
-        complete_cmd = ["rsync",
+        complete_cmd = [self._rsync,
                 "-v",
                 f"--rsh={' '.join(ssh_cmd)}",
                 "-rlpt",  # --recursive --links --perms --times
@@ -417,7 +427,7 @@ def sshfs(self, *, path, mountpoint):
         if not self._check_keepalive():
             raise ExecutionError("Keepalive no longer running")
 
-        complete_cmd = ["sshfs",
+        complete_cmd = [self._sshfs,
                 "-F", "none",
                 "-f",
                 "-o", f"ControlPath={self.control.replace('%', '%%')}",
@@ -445,7 +455,7 @@ def get_status(self):
 
     @cached_property
     def _ssh_version(self):
-        version = subprocess.run(["ssh", "-V"], capture_output=True, text=True)
+        version = subprocess.run([self._ssh, "-V"], capture_output=True, text=True)
         version = re.match(r"^OpenSSH_(\d+)\.(\d+)", version.stderr)
         return tuple(int(x) for x in version.groups())
 
@@ -472,7 +482,8 @@ def _scp_supports_explicit_scp_mode(self):
     @step(args=['filename', 'remotepath'])
     def put(self, filename, remotepath=''):
         transfer_cmd = [
-            "scp",
+            self._scp,
+            "-S", self._ssh,
             *self.ssh_prefix,
             "-P", str(self.networkservice.port),
             "-r",
@@ -502,7 +513,8 @@ def put(self, filename, remotepath=''):
     @step(args=['filename', 'destination'])
     def get(self, filename, destination="."):
         transfer_cmd = [
-            "scp",
+            self._scp,
+            "-S", self._ssh,
             *self.ssh_prefix,
             "-P", str(self.networkservice.port),
             "-r",
@@ -530,7 +542,7 @@ def get(self, filename, destination="."):
 
     def _cleanup_own_master(self):
         """Exit the controlmaster and delete the tmpdir"""
-        complete_cmd = f"ssh -x -o ControlPath={self.control.replace('%', '%%')} -O exit -p {self.networkservice.port} -l {self._get_username()} {self.networkservice.address}".split(' ')  # pylint: disable=line-too-long
+        complete_cmd = f"{self._ssh} -x -o ControlPath={self.control.replace('%', '%%')} -O exit -p {self.networkservice.port} -l {self._get_username()} {self.networkservice.address}".split(' ')  # pylint: disable=line-too-long
         res = subprocess.call(
             complete_cmd,
             stdin=subprocess.DEVNULL,
@@ -547,7 +559,7 @@ def _cleanup_own_master(self):
 
     def _start_keepalive(self):
         """Starts a keepalive connection via the own or external master."""
-        args = ["ssh", *self.ssh_prefix, self.networkservice.address, "cat"]
+        args = [self._ssh, *self.ssh_prefix, self.networkservice.address, "cat"]
 
         assert self._keepalive is None
         self._keepalive = subprocess.Popen(

man/labgrid-device-config.5

@@ -132,6 +132,14 @@ See:  <https://www.intel.com/content/www/us/en/docs/programmable/683039/22\-3/hp
 Path to the rk\-usb\-loader binary, used by the RKUSBDriver.
 See:  <https://git.pengutronix.de/cgit/barebox/tree/scripts/rk\-usb\-loader.c> 
 .TP
+.B \fBrsync\fP
+Path to the rsync binary, used by the SSHDriver.
+See:  <https://github.com/rsyncproject/rsync> 
+.TP
+.B \fBscp\fP
+Path to the scp binary, used by the SSHDriver.
+See:  <https://github.com/openssh/openssh\-portable> 
+.TP
 .B \fBsd\-mux\-ctrl\fP
 Path to the sd\-mux\-ctrl binary, used by the USBSDWireDriver.
 See:  <https://git.tizen.org/cgit/tools/testlab/sd\-mux/> 
@@ -140,6 +148,14 @@ See:  <https://git.tizen.org/cgit/tools/testlab/sd\-mux/>
 Path to the sispmctl binary, used by the SiSPMPowerDriver.
 See:  <https://sispmctl.sourceforge.net/> 
 .TP
+.B \fBssh\fP
+Path to the ssh binary, used by the SSHDriver.
+See:  <https://github.com/openssh/openssh\-portable> 
+.TP
+.B \fBsshfs\fP
+Path to the sshfs binary, used by the SSHDriver.
+See:  <https://github.com/libfuse/sshfs> 
+.TP
 .B \fBuhubctl\fP
 Path to the uhubctl binary, used by the USBPowerDriver.
 See:  <https://github.com/mvp/uhubctl> 

man/labgrid-device-config.rst

@@ -131,6 +131,14 @@ TOOLS KEYS
     Path to the rk-usb-loader binary, used by the RKUSBDriver.
     See: https://git.pengutronix.de/cgit/barebox/tree/scripts/rk-usb-loader.c
 
+``rsync``
+    Path to the rsync binary, used by the SSHDriver.
+    See: https://github.com/rsyncproject/rsync
+
+``scp``
+    Path to the scp binary, used by the SSHDriver.
+    See: https://github.com/openssh/openssh-portable
+
 ``sd-mux-ctrl``
     Path to the sd-mux-ctrl binary, used by the USBSDWireDriver.
     See: https://git.tizen.org/cgit/tools/testlab/sd-mux/
@@ -139,6 +147,14 @@ TOOLS KEYS
     Path to the sispmctl binary, used by the SiSPMPowerDriver.
     See: https://sispmctl.sourceforge.net/
 
+``ssh``
+    Path to the ssh binary, used by the SSHDriver.
+    See: https://github.com/openssh/openssh-portable
+
+``sshfs``
+    Path to the sshfs binary, used by the SSHDriver.
+    See: https://github.com/libfuse/sshfs
+
 ``uhubctl``
     Path to the uhubctl binary, used by the USBPowerDriver.
     See: https://github.com/mvp/uhubctl

tests/test_sshdriver.py

@@ -1,6 +1,7 @@
 import pytest
 import socket
 
+from labgrid import Environment
 from labgrid.driver import SSHDriver, ExecutionError
 from labgrid.exceptions import NoResourceFoundError
 from labgrid.resource import NetworkService
@@ -58,6 +59,27 @@ def test_run_check_raise(target, ssh_driver_mocked_and_activated, mocker):
     assert res == (['error'], [], 1)
     target.deactivate(s)
 
+def test_default_tools(target):
+    NetworkService(target, "service", "1.2.3.4", "root")
+    s = SSHDriver(target, "ssh")
+    assert [s._ssh, s._scp, s._sshfs, s._rsync] == ["ssh", "scp", "sshfs", "rsync"]
+
+def test_custom_tools(target, tmpdir):
+    p = tmpdir.join("config.yaml")
+    p.write(
+        """
+        tools:
+          ssh: "/path/to/ssh"
+          scp: "/path/to/scp"
+          sshfs: "/path/to/sshfs"
+          rsync: "/path/to/rsync"
+        """
+    )
+    target.env = Environment(str(p))
+    NetworkService(target, "service", "1.2.3.4", "root")
+    s = SSHDriver(target, "ssh")
+    assert [s._ssh, s._scp, s._sshfs, s._rsync] == [f"/path/to/{t}" for t in ("ssh", "scp", "sshfs", "rsync")]
+
 @pytest.fixture(scope='function')
 def ssh_localhost(target, pytestconfig):
     name = pytestconfig.getoption("--ssh-username")