fix: limit the amount of minor to build

Since we are limited to 256 job per run in a github workflow, we can't
keep building all the minor versions for every major.
This limit the amount of minor version to build to the 5 most recent
ones.

build-matrix/main.go

@@ -14,6 +14,8 @@ import (
 const (
 	// Define the oldest major version we care about, we do not want to build image starting ansible 1.0
 	minSupportedMajor = 7
+	// Numbed of latest minor release to keep building
+	maxSupportedMinor = 5
 )
 
 type ReleaseResponse struct {
@@ -38,6 +40,7 @@ type Matrix []matrixVersion
 // - 10.1
 // - 10.3
 // - 10.4, additional_tags: 10
+// We also only keep the latest 5 minor versions because we are limited to 256 jobs per workflow run
 // Check main_test.go for a quick overview of the expected behavior.
 func main() {
 	resp, err := http.Get("https://pypi.org/pypi/ansible/json")
@@ -87,7 +90,9 @@ func GenerateBuildMatrix(reader io.Reader, minSupportedMajor uint64) Matrix {
 		if _, exists := versionGroupedByMajor[major]; !exists {
 			majorVersions = append(majorVersions, major)
 		}
-		versionGroupedByMajor[major] = append(versionGroupedByMajor[major], version)
+		if len(versionGroupedByMajor[major]) < maxSupportedMinor {
+			versionGroupedByMajor[major] = append(versionGroupedByMajor[major], version)
+		}
 	}
 
 	sort.Sort(sort.Reverse(sort.IntSlice(majorVersions)))

build-matrix/main_test.go

@@ -20,6 +20,10 @@ func TestGenerateBuildMatrix(t *testing.T) {
 			"3.1.0":  struct{}{},
 			"3.1.1":  struct{}{},
 			"3.2.0":  struct{}{},
+			"3.3.0":  struct{}{},
+			"3.4.0":  struct{}{},
+			"3.5.0":  struct{}{},
+			"3.6.0":  struct{}{},
 		},
 	}
 
@@ -29,11 +33,23 @@ func TestGenerateBuildMatrix(t *testing.T) {
 	matrix := GenerateBuildMatrix(bytes.NewReader(fakeJsonResponse), 2)
 	expectedMatrix := Matrix{
 		{
-			Ansible:        "3.2",
+			Ansible:        "3.6",
 			AdditionalTags: []string{"3"},
 		},
 		{
-			Ansible:        "3.1",
+			Ansible:        "3.5",
+			AdditionalTags: []string{},
+		},
+		{
+			Ansible:        "3.4",
+			AdditionalTags: []string{},
+		},
+		{
+			Ansible:        "3.3",
+			AdditionalTags: []string{},
+		},
+		{
+			Ansible:        "3.2",
 			AdditionalTags: []string{},
 		},
 		{