// Validate implements environs.EnvironProvider.Validate.
func (provider environProvider) Validate(cfg, old *config.Config) (valid *config.Config, err error) {
// Check for valid changes for the base config values.
if err := config.Validate(cfg, old); err != nil {
return nil, err
}
validated, err := cfg.ValidateUnknownAttrs(configFields, configDefaults)
if err != nil {
return nil, err
}
localConfig := newEnvironConfig(cfg, validated)
// Before potentially creating directories, make sure that the
// root directory has not changed.
if old != nil {
oldLocalConfig, err := provider.newConfig(old)
if err != nil {
return nil, fmt.Errorf("old config is not a valid local config: %v", old)
}
if localConfig.rootDir() != oldLocalConfig.rootDir() {
return nil, fmt.Errorf("cannot change root-dir from %q to %q",
oldLocalConfig.rootDir(),
localConfig.rootDir())
}
if localConfig.storagePort() != oldLocalConfig.storagePort() {
return nil, fmt.Errorf("cannot change storage-port from %v to %v",
oldLocalConfig.storagePort(),
localConfig.storagePort())
}
if localConfig.sharedStoragePort() != oldLocalConfig.sharedStoragePort() {
return nil, fmt.Errorf("cannot change shared-storage-port from %v to %v",
oldLocalConfig.sharedStoragePort(),
localConfig.sharedStoragePort())
}
}
dir := utils.NormalizePath(localConfig.rootDir())
if dir == "." {
dir = config.JujuHomePath(cfg.Name())
localConfig.attrs["root-dir"] = dir
}
// Apply the coerced unknown values back into the config.
return cfg.Apply(localConfig.attrs)
}
func (*fileSuite) TestNormalizePath(c *gc.C) {
for _, test := range []struct {
path string
expected string
}{{
path: "/var/lib/juju",
expected: "/var/lib/juju",
}, {
path: "~/foo",
expected: "/home/test-user/foo",
}, {
path: "~/foo//../bar",
expected: "/home/test-user/bar",
}, {
path: "~bob/foo",
expected: "~bob/foo",
}} {
c.Assert(utils.NormalizePath(test.path), gc.Equals, test.expected)
}
}