fix(context): Ensure resource set paths are made absolute

Resolving of files (for `insertFile` and `insertTemplate`) should
always be relative to the resource set location, the previous
behaviour was considered a bug.

This is fixed by ensuring that resource set paths are absolute at
context loading time.

context/context.go

@@ -77,7 +77,7 @@ func LoadContext(filename string, explicitVars *[]string) (*Context, error) {
 	ctx.BaseDir = path.Dir(filename)
 
 	// Prepare the resource sets by resolving parents etc.
-	ctx.ResourceSets = flattenPrepareResourceSetPaths(&ctx.ResourceSets)
+	ctx.ResourceSets = flattenPrepareResourceSetPaths(&ctx.BaseDir, &ctx.ResourceSets)
 
 	// Add variables explicitly specified on the command line
 	ctx.ExplicitVars, err = loadExplicitVars(explicitVars)
@@ -136,7 +136,7 @@ func (ctx *Context) loadImportedVariables() (map[string]interface{}, error) {
 // collections, i.e. resource sets that themselves have an additional 'include' field set.
 // Those will be regarded as a short-hand for including multiple resource sets from a subfolder.
 // See https://github.com/tazjin/kontemplate/issues/9 for more information.
-func flattenPrepareResourceSetPaths(rs *[]ResourceSet) []ResourceSet {
+func flattenPrepareResourceSetPaths(baseDir *string, rs *[]ResourceSet) []ResourceSet {
 	flattened := make([]ResourceSet, 0)
 
 	for _, r := range *rs {
@@ -146,6 +146,12 @@ func flattenPrepareResourceSetPaths(rs *[]ResourceSet) []ResourceSet {
 			r.Path = r.Name
 		}
 
+		// Paths are made absolute by resolving them relative to the context base,
+		// unless absolute paths were specified.
+		if !path.IsAbs(r.Path) {
+			r.Path = path.Join(*baseDir, r.Path)
+		}
+
 		if len(r.Include) == 0 {
 			flattened = append(flattened, r)
 		} else {
@@ -225,7 +231,7 @@ func loadDefaultValues(rs *ResourceSet, c *Context) *map[string]interface{} {
 	var defaultVars map[string]interface{}
 
 	for _, filename := range util.DefaultFilenames {
-		err := util.LoadData(path.Join(c.BaseDir, rs.Path, filename), &defaultVars)
+		err := util.LoadData(path.Join(rs.Path, filename), &defaultVars)
 		if err == nil {
 			return &defaultVars
 		}

context/context_test.go

@@ -32,7 +32,7 @@ func TestLoadFlatContextFromFile(t *testing.T) {
 		ResourceSets: []ResourceSet{
 			{
 				Name: "some-api",
-				Path: "some-api",
+				Path: "testdata/some-api",
 				Values: map[string]interface{}{
 					"apiPort":          float64(4567), // yep!
 					"importantFeature": true,
@@ -67,7 +67,7 @@ func TestLoadContextWithArgs(t *testing.T) {
 		ResourceSets: []ResourceSet{
 			{
 				Name:   "some-api",
-				Path:   "some-api",
+				Path:   "testdata/some-api",
 				Values: make(map[string]interface{}, 0),
 				Args: []string{
 					"--as=some-user",
@@ -106,7 +106,7 @@ func TestLoadContextWithResourceSetCollections(t *testing.T) {
 		ResourceSets: []ResourceSet{
 			{
 				Name: "some-api",
-				Path: "some-api",
+				Path: "testdata/some-api",
 				Values: map[string]interface{}{
 					"apiPort":          float64(4567), // yep!
 					"importantFeature": true,
@@ -118,7 +118,7 @@ func TestLoadContextWithResourceSetCollections(t *testing.T) {
 			},
 			{
 				Name: "collection/nested",
-				Path: "collection/nested",
+				Path: "testdata/collection/nested",
 				Values: map[string]interface{}{
 					"lizards":   "good",
 					"globalVar": "lizards",
@@ -152,7 +152,7 @@ func TestSubresourceVariableInheritance(t *testing.T) {
 		ResourceSets: []ResourceSet{
 			{
 				Name: "parent/child",
-				Path: "parent/child",
+				Path: "testdata/parent/child",
 				Values: map[string]interface{}{
 					"foo": "bar",
 					"bar": "baz",
@@ -185,7 +185,7 @@ func TestSubresourceVariableInheritanceOverride(t *testing.T) {
 		ResourceSets: []ResourceSet{
 			{
 				Name: "parent/child",
-				Path: "parent/child",
+				Path: "testdata/parent/child",
 				Values: map[string]interface{}{
 					"foo": "newvalue",
 				},
@@ -256,7 +256,7 @@ func TestExplicitPathLoading(t *testing.T) {
 		ResourceSets: []ResourceSet{
 			{
 				Name: "some-api-europe",
-				Path: "some-api",
+				Path: "testdata/some-api",
 				Values: map[string]interface{}{
 					"location": "europe",
 				},
@@ -265,7 +265,7 @@ func TestExplicitPathLoading(t *testing.T) {
 			},
 			{
 				Name: "some-api-asia",
-				Path: "some-api",
+				Path: "testdata/some-api",
 				Values: map[string]interface{}{
 					"location": "asia",
 				},
@@ -296,7 +296,7 @@ func TestExplicitSubresourcePathLoading(t *testing.T) {
 		ResourceSets: []ResourceSet{
 			{
 				Name:   "parent/child",
-				Path:   "parent-path/child-path",
+				Path:   "testdata/parent-path/child-path",
 				Parent: "parent",
 				Values: make(map[string]interface{}, 0),
 			},