ssh: install an ssh client

Fixes #3667

tests/modules/programs/ssh/default-config.nix

@@ -6,6 +6,8 @@ with lib;
   config = {
     programs.ssh = { enable = true; };
 
+    test.stubs.openssh = { };
+
     home.file.assertions.text = builtins.toJSON
       (map (a: a.message) (filter (a: !a.assertion) config.assertions));
 

tests/modules/programs/ssh/forwards-dynamic-bind-path-with-port-asserts.nix

@@ -17,6 +17,8 @@ with lib;
       };
     };
 
+    test.stubs.openssh = { };
+
     test.asserts.assertions.expected = [ "Forwarded paths cannot have ports." ];
   };
 }

tests/modules/programs/ssh/forwards-dynamic-valid-bind-no-asserts.nix

@@ -27,6 +27,8 @@ with lib;
     home.file.result.text = builtins.toJSON
       (map (a: a.message) (filter (a: !a.assertion) config.assertions));
 
+    test.stubs.openssh = { };
+
     nmt.script = ''
       assertFileExists home-files/.ssh/config
       assertFileContent \

tests/modules/programs/ssh/forwards-local-bind-path-with-port-asserts.nix

@@ -21,6 +21,8 @@ with lib;
       };
     };
 
+    test.stubs.openssh = { };
+
     test.asserts.assertions.expected = [ "Forwarded paths cannot have ports." ];
   };
 }

tests/modules/programs/ssh/forwards-local-host-path-with-port-asserts.nix

@@ -21,6 +21,8 @@ with lib;
       };
     };
 
+    test.stubs.openssh = { };
+
     test.asserts.assertions.expected = [ "Forwarded paths cannot have ports." ];
   };
 }

tests/modules/programs/ssh/forwards-remote-bind-path-with-port-asserts.nix

@@ -21,6 +21,8 @@ with lib;
       };
     };
 
+    test.stubs.openssh = { };
+
     test.asserts.assertions.expected = [ "Forwarded paths cannot have ports." ];
   };
 }

tests/modules/programs/ssh/forwards-remote-host-path-with-port-asserts.nix

@@ -21,6 +21,8 @@ with lib;
       };
     };
 
+    test.stubs.openssh = { };
+
     test.asserts.assertions.expected = [ "Forwarded paths cannot have ports." ];
   };
 }

tests/modules/programs/ssh/includes.nix

@@ -7,6 +7,8 @@
       includes = [ "config.d/*" "other/dir" ];
     };
 
+    test.stubs.openssh = { };
+
     nmt.script = ''
       assertFileExists home-files/.ssh/config
       assertFileContains home-files/.ssh/config "Include config.d/* other/dir"

tests/modules/programs/ssh/match-blocks-attrs.nix

@@ -51,6 +51,8 @@ with lib;
     home.file.assertions.text = builtins.toJSON
       (map (a: a.message) (filter (a: !a.assertion) config.assertions));
 
+    test.stubs.openssh = { };
+
     nmt.script = ''
       assertFileExists home-files/.ssh/config
       assertFileContent \

tests/modules/programs/ssh/match-blocks-match-and-hosts.nix

@@ -21,6 +21,8 @@ with lib;
     home.file.assertions.text = builtins.toJSON
       (map (a: a.message) (filter (a: !a.assertion) config.assertions));
 
+    test.stubs.openssh = { };
+
     nmt.script = ''
       assertFileExists home-files/.ssh/config
       assertFileContent \