Avoid using log.Fatal in pkg/* (#1705)

* fix: common

* fix: in runner

* fix: decodeNode

* fix: GetMatrixes

* Revert "fix: common"

This reverts commit 6599803b6ae3b7adc168ef41b4afd4d89fc22f34.

* fix: GetOutboundIP

* test: fix cases

---------

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/model/workflow.go

@@ -248,15 +248,13 @@ func (j *Job) Container() *ContainerSpec {
 	switch j.RawContainer.Kind {
 	case yaml.ScalarNode:
 		val = new(ContainerSpec)
-		err := j.RawContainer.Decode(&val.Image)
-		if err != nil {
-			log.Fatal(err)
+		if !decodeNode(j.RawContainer, &val.Image) {
+			return nil
 		}
 	case yaml.MappingNode:
 		val = new(ContainerSpec)
-		err := j.RawContainer.Decode(val)
-		if err != nil {
-			log.Fatal(err)
+		if !decodeNode(j.RawContainer, val) {
+			return nil
 		}
 	}
 	return val
@@ -267,16 +265,14 @@ func (j *Job) Needs() []string {
 	switch j.RawNeeds.Kind {
 	case yaml.ScalarNode:
 		var val string
-		err := j.RawNeeds.Decode(&val)
-		if err != nil {
-			log.Fatal(err)
+		if !decodeNode(j.RawNeeds, &val) {
+			return nil
 		}
 		return []string{val}
 	case yaml.SequenceNode:
 		var val []string
-		err := j.RawNeeds.Decode(&val)
-		if err != nil {
-			log.Fatal(err)
+		if !decodeNode(j.RawNeeds, &val) {
+			return nil
 		}
 		return val
 	}
@@ -288,16 +284,14 @@ func (j *Job) RunsOn() []string {
 	switch j.RawRunsOn.Kind {
 	case yaml.ScalarNode:
 		var val string
-		err := j.RawRunsOn.Decode(&val)
-		if err != nil {
-			log.Fatal(err)
+		if !decodeNode(j.RawRunsOn, &val) {
+			return nil
 		}
 		return []string{val}
 	case yaml.SequenceNode:
 		var val []string
-		err := j.RawRunsOn.Decode(&val)
-		if err != nil {
-			log.Fatal(err)
+		if !decodeNode(j.RawRunsOn, &val) {
+			return nil
 		}
 		return val
 	}
@@ -307,8 +301,8 @@ func (j *Job) RunsOn() []string {
 func environment(yml yaml.Node) map[string]string {
 	env := make(map[string]string)
 	if yml.Kind == yaml.MappingNode {
-		if err := yml.Decode(&env); err != nil {
-			log.Fatal(err)
+		if !decodeNode(yml, &env) {
+			return nil
 		}
 	}
 	return env
@@ -323,8 +317,8 @@ func (j *Job) Environment() map[string]string {
 func (j *Job) Matrix() map[string][]interface{} {
 	if j.Strategy.RawMatrix.Kind == yaml.MappingNode {
 		var val map[string][]interface{}
-		if err := j.Strategy.RawMatrix.Decode(&val); err != nil {
-			log.Fatal(err)
+		if !decodeNode(j.Strategy.RawMatrix, &val) {
+			return nil
 		}
 		return val
 	}
@@ -335,7 +329,7 @@ func (j *Job) Matrix() map[string][]interface{} {
 // It skips includes and hard fails excludes for non-existing keys
 //
 //nolint:gocyclo
-func (j *Job) GetMatrixes() []map[string]interface{} {
+func (j *Job) GetMatrixes() ([]map[string]interface{}, error) {
 	matrixes := make([]map[string]interface{}, 0)
 	if j.Strategy != nil {
 		j.Strategy.FailFast = j.Strategy.GetFailFast()
@@ -386,7 +380,7 @@ func (j *Job) GetMatrixes() []map[string]interface{} {
 						excludes = append(excludes, e)
 					} else {
 						// We fail completely here because that's what GitHub does for non-existing matrix keys, fail on exclude, silent skip on include
-						log.Fatalf("The workflow is not valid. Matrix exclude key '%s' does not match any key within the matrix", k)
+						return nil, fmt.Errorf("the workflow is not valid. Matrix exclude key %q does not match any key within the matrix", k)
 					}
 				}
 			}
@@ -431,7 +425,7 @@ func (j *Job) GetMatrixes() []map[string]interface{} {
 	} else {
 		matrixes = append(matrixes, make(map[string]interface{}))
 	}
-	return matrixes
+	return matrixes, nil
 }
 
 func commonKeysMatch(a map[string]interface{}, b map[string]interface{}) bool {
@@ -671,3 +665,17 @@ func (w *Workflow) GetJobIDs() []string {
 	}
 	return ids
 }
+
+var OnDecodeNodeError = func(node yaml.Node, out interface{}, err error) {
+	log.Fatalf("Failed to decode node %v into %T: %v", node, out, err)
+}
+
+func decodeNode(node yaml.Node, out interface{}) bool {
+	if err := node.Decode(out); err != nil {
+		if OnDecodeNodeError != nil {
+			OnDecodeNodeError(node, out, err)
+		}
+		return false
+	}
+	return true
+}