Redesign PAC Resolver

This will redesign resolver to work with
multiple edge case scenarios.

Previously pac resolver was filtering
pipelinerun based on annotations but it was
resolving all pipelines in .tekton dir
leading to resolving unnecessary pipelines
and other issue was it was storing task
based on task name, instead of annotation name
and version, so different version of task
were not used across pipelineruns in .tekton dir

Now with new design we are first filtering
pipelinerun based on annotations, and then
processing all pipelineruns one by one
and only resolving pipeline related to these
pipelineruns. Also we are now maintaining map
of tasks with name and version at event level
to not re fetch the task and now inline spec
replacement in pipelinerun is done one by one
so respective task as mentioned in annotation
with name and version is used

Also before filtering the pipelineruns, we should
make sure that no two pipelineruns exists with
same name in .tekton dir

Added tests for the three scenarios

Author: piyush-garg

pkg/matcher/annotation_tasks_install.go

@@ -181,60 +181,54 @@ func grabValuesFromAnnotations(annotations map[string]string, annotationReg stri
 	return ret, nil
 }
 
-// GetTaskFromAnnotations Get task remotely if they are on Annotations.
-func (rt RemoteTasks) GetTaskFromAnnotations(ctx context.Context, annotations map[string]string) ([]*tektonv1.Task, error) {
-	ret := []*tektonv1.Task{}
-	tasks, err := grabValuesFromAnnotations(annotations, taskAnnotationsRegexp)
+func GrabTasksFromAnnotations(annotations map[string]string) ([]string, error) {
+	return grabValuesFromAnnotations(annotations, taskAnnotationsRegexp)
+}
+
+func GrabPipelineFromAnnotations(annotations map[string]string) (string, error) {
+	pipelinesAnnotation, err := grabValuesFromAnnotations(annotations, pipelineAnnotationsRegexp)
 	if err != nil {
-		return nil, err
+		return "", err
 	}
-	for _, v := range tasks {
-		data, err := rt.getRemote(ctx, v, true, "task")
-		if err != nil {
-			return nil, fmt.Errorf("error getting remote task \"%s\": %w", v, err)
-		}
-		if data == "" {
-			return nil, fmt.Errorf("could not get remote task \"%s\": returning empty", v)
-		}
-
-		task, err := rt.convertTotask(ctx, v, data)
-		if err != nil {
-			return nil, err
-		}
-		ret = append(ret, task)
+	if len(pipelinesAnnotation) > 1 {
+		return "", fmt.Errorf("only one pipeline is allowed on remote resolution, we have received multiple of them: %+v", pipelinesAnnotation)
 	}
-	return ret, nil
+	if len(pipelinesAnnotation) == 0 {
+		return "", nil
+	}
+	return pipelinesAnnotation[0], nil
 }
 
-// GetPipelineFromAnnotations Get pipeline remotely if they are on Annotations
-// TODO: merge in a generic between the two.
-func (rt RemoteTasks) GetPipelineFromAnnotations(ctx context.Context, annotations map[string]string) (*tektonv1.Pipeline, error) {
-	ret := []*tektonv1.Pipeline{}
-	pipelinesAnnotation, err := grabValuesFromAnnotations(annotations, pipelineAnnotationsRegexp)
+func (rt RemoteTasks) GetTaskFromAnnotationName(ctx context.Context, name string) (*tektonv1.Task, error) {
+	data, err := rt.getRemote(ctx, name, true, "task")
+	if err != nil {
+		return nil, fmt.Errorf("error getting remote task \"%s\": %w", name, err)
+	}
+	if data == "" {
+		return nil, fmt.Errorf("could not get remote task \"%s\": returning empty", name)
+	}
+
+	task, err := rt.convertTotask(ctx, name, data)
 	if err != nil {
 		return nil, err
 	}
-	if len(pipelinesAnnotation) > 1 {
-		return nil, fmt.Errorf("only one pipeline is allowed on remote resolution, we have received multiple of them: %+v", pipelinesAnnotation)
+	return task, nil
+}
+
+func (rt RemoteTasks) GetPipelineFromAnnotationName(ctx context.Context, name string) (*tektonv1.Pipeline, error) {
+	data, err := rt.getRemote(ctx, name, true, "pipeline")
+	if err != nil {
+		return nil, fmt.Errorf("error getting remote pipeline \"%s\": %w", name, err)
 	}
-	if len(pipelinesAnnotation) == 0 {
-		return nil, nil
+	if data == "" {
+		return nil, fmt.Errorf("could not get remote pipeline \"%s\": returning empty", name)
 	}
-	for _, v := range pipelinesAnnotation {
-		data, err := rt.getRemote(ctx, v, true, "pipeline")
-		if err != nil {
-			return nil, fmt.Errorf("error getting remote pipeline %s: %w", v, err)
-		}
-		if data == "" {
-			return nil, fmt.Errorf("could not get remote pipeline \"%s\": returning empty", v)
-		}
-		pipeline, err := rt.convertToPipeline(ctx, v, data)
-		if err != nil {
-			return nil, err
-		}
-		ret = append(ret, pipeline)
+
+	pipeline, err := rt.convertToPipeline(ctx, name, data)
+	if err != nil {
+		return nil, err
 	}
-	return ret[0], nil
+	return pipeline, nil
 }
 
 // getFileFromLocalFS get task locally if file exist