func (*DebugHooksClientSuite) TestClientScript(c *C) {
ctx := debug.NewHooksContext("foo/8")
// Test the variable substitutions.
result := debug.ClientScript(ctx, nil)
// No variables left behind.
c.Assert(result, Matches, "[^{}]*")
// tmux new-session -d -s {unit_name}
c.Assert(result, Matches, fmt.Sprintf("(.|\n)*tmux new-session -s %s(.|\n)*", regexp.QuoteMeta(ctx.Unit)))
//) 9>{exit_flock}
c.Assert(result, Matches, fmt.Sprintf("(.|\n)*\\) 9>%s(.|\n)*", regexp.QuoteMeta(ctx.ClientExitFileLock())))
//) 8>{entry_flock}
c.Assert(result, Matches, fmt.Sprintf("(.|\n)*\\) 8>%s(.|\n)*", regexp.QuoteMeta(ctx.ClientFileLock())))
// nil is the same as empty slice is the same as "*".
// Also, if "*" is present as well as a named hook,
// it is equivalent to "*".
c.Assert(debug.ClientScript(ctx, nil), Equals, debug.ClientScript(ctx, []string{}))
c.Assert(debug.ClientScript(ctx, []string{"*"}), Equals, debug.ClientScript(ctx, nil))
c.Assert(debug.ClientScript(ctx, []string{"*", "something"}), Equals, debug.ClientScript(ctx, []string{"*"}))
// debug.ClientScript does not validate hook names, as it doesn't have
// a full state API connection to determine valid relation hooks.
expected := fmt.Sprintf(
`(.|\n)*echo "aG9va3M6Ci0gc29tZXRoaW5nIHNvbWV0aGluZ2Vsc2UK" | base64 -d > %s(.|\n)*`,
regexp.QuoteMeta(ctx.ClientFileLock()),
)
c.Assert(debug.ClientScript(ctx, []string{"something somethingelse"}), Matches, expected)
}
// RunHook executes a hook in an environment which allows it to to call back
// into ctx to execute jujuc tools.
func (ctx *HookContext) RunHook(hookName, charmDir, toolsDir, socketPath string) error {
var err error
env := ctx.hookVars(charmDir, toolsDir, socketPath)
debugctx := unitdebug.NewHooksContext(ctx.unit.Name())
if session, _ := debugctx.FindSession(); session != nil && session.MatchHook(hookName) {
logger.Infof("executing %s via debug-hooks", hookName)
err = session.RunHook(hookName, charmDir, env)
} else {
err = runCharmHook(hookName, charmDir, env)
}
write := err == nil
for id, rctx := range ctx.relations {
if write {
if e := rctx.WriteSettings(); e != nil {
e = fmt.Errorf(
"could not write settings from %q to relation %d: %v",
hookName, id, e,
)
logger.Errorf("%v", e)
if err == nil {
err = e
}
}
}
rctx.ClearCache()
}
return err
}
// TestCommonScript tests the behaviour of HooksContext.
func (*DebugHooksCommonSuite) TestHooksContext(c *C) {
ctx := debug.NewHooksContext("foo/8")
c.Assert(ctx.Unit, Equals, "foo/8")
c.Assert(ctx.FlockDir, Equals, "/tmp")
ctx.FlockDir = "/var/lib/juju"
c.Assert(ctx.ClientFileLock(), Equals, "/var/lib/juju/juju-unit-foo-8-debug-hooks")
c.Assert(ctx.ClientExitFileLock(), Equals, "/var/lib/juju/juju-unit-foo-8-debug-hooks-exit")
}
func (s *DebugHooksServerSuite) SetUpTest(c *C) {
s.fakebin = c.MkDir()
s.tmpdir = c.MkDir()
s.setenv("PATH", s.fakebin+":"+os.Getenv("PATH"))
s.setenv("TMPDIR", s.tmpdir)
s.setenv("TEST_RESULT", "")
for _, name := range fakecommands {
err := ioutil.WriteFile(filepath.Join(s.fakebin, name), []byte(echocommand), 0777)
c.Assert(err, IsNil)
}
s.ctx = debug.NewHooksContext("foo/8")
s.ctx.FlockDir = s.tmpdir
s.setenv("JUJU_UNIT_NAME", s.ctx.Unit)
}
// Run ensures c.Target is a unit, and resolves its address,
// and connects to it via SSH to execute the debug-hooks
// script.
func (c *DebugHooksCommand) Run(ctx *cmd.Context) error {
conn, err := c.initConn()
if err != nil {
return err
}
defer conn.Close()
unit, err := conn.State.Unit(c.Target)
if err != nil {
return err
}
err = c.validateHooks(unit)
if err != nil {
return err
}
debugctx := unitdebug.NewHooksContext(c.Target)
script := base64.StdEncoding.EncodeToString([]byte(unitdebug.ClientScript(debugctx, c.hooks)))
innercmd := fmt.Sprintf(`F=$(mktemp); echo %s | base64 -d > $F; . $F`, script)
args := []string{"--", fmt.Sprintf("sudo /bin/bash -c '%s'", innercmd)}
c.Args = args
return c.SSHCommand.Run(ctx)
}