Fixes #598 (#628)

* Potentially solved merge conflict

* Update pkg/model/planner.go

Based on feedback

Co-authored-by: Ryan (hackercat) <me@hackerc.at>

* Fixed compilation error

* added missed test

* Fixed spelling error to work with lint error

Co-authored-by: Ryan (hackercat) <me@hackerc.at>
Co-authored-by: Casey Lee <cplee@nektos.com>

pkg/model/workflow.go

@@ -59,7 +59,7 @@ type Job struct {
 	RawNeeds       yaml.Node                 `yaml:"needs"`
 	RawRunsOn      yaml.Node                 `yaml:"runs-on"`
 	Env            map[string]string         `yaml:"env"`
-	If             string                    `yaml:"if"`
+	If             yaml.Node                 `yaml:"if"`
 	Steps          []*Step                   `yaml:"steps"`
 	TimeoutMinutes int64                     `yaml:"timeout-minutes"`
 	Services       map[string]*ContainerSpec `yaml:"services"`
@@ -211,7 +211,7 @@ type ContainerSpec struct {
 // Step is the structure of one step in a job
 type Step struct {
 	ID               string            `yaml:"id"`
-	If               string            `yaml:"if"`
+	If               yaml.Node         `yaml:"if"`
 	Name             string            `yaml:"name"`
 	Uses             string            `yaml:"uses"`
 	Run              string            `yaml:"run"`