func (*DebugHooksClientSuite) TestClientScript(c *gc.C) {
ctx := debug.NewHooksContext("foo/8")
// Test the variable substitutions.
result := debug.ClientScript(ctx, nil)
// No variables left behind.
c.Assert(result, gc.Matches, "[^{}]*")
// tmux new-session -d -s {unit_name}
c.Assert(result, gc.Matches, fmt.Sprintf("(.|\n)*tmux new-session -s %s(.|\n)*", regexp.QuoteMeta(ctx.Unit)))
//) 9>{exit_flock}
c.Assert(result, gc.Matches, fmt.Sprintf("(.|\n)*\\) 9>%s(.|\n)*", regexp.QuoteMeta(ctx.ClientExitFileLock())))
//) 8>{entry_flock}
c.Assert(result, gc.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), gc.Equals, debug.ClientScript(ctx, []string{}))
c.Assert(debug.ClientScript(ctx, []string{"*"}), gc.Equals, debug.ClientScript(ctx, nil))
c.Assert(debug.ClientScript(ctx, []string{"*", "something"}), gc.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"}), gc.Matches, expected)
}
// TestHooksContext tests the behaviour of HooksContext.
func (*DebugHooksCommonSuite) TestHooksContext(c *gc.C) {
ctx := debug.NewHooksContext("foo/8")
c.Assert(ctx.Unit, gc.Equals, "foo/8")
c.Assert(ctx.FlockDir, gc.Equals, "/tmp")
ctx.FlockDir = "/var/lib/juju"
c.Assert(ctx.ClientFileLock(), gc.Equals, "/var/lib/juju/juju-unit-foo-8-debug-hooks")
c.Assert(ctx.ClientExitFileLock(), gc.Equals, "/var/lib/juju/juju-unit-foo-8-debug-hooks-exit")
}
// RunHook executes a hook in an environment which allows it to to call back
// into the hook context 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 = ctx.runCharmHook(hookName, charmDir, env)
}
return ctx.finalizeContext(hookName, err)
}
// 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 {
var err error
c.apiClient, err = c.initAPIClient()
if err != nil {
return err
}
defer c.apiClient.Close()
err = c.validateHooks()
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)
}