change update-go-mod.sh to use head of main for fosite via config file

hack/update-go-mod/main.go

@@ -8,21 +8,37 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"golang.org/x/mod/modfile"
 )
 
 func main() {
 	goModFilepath := filepath.Clean(os.Args[1])
+	overridesFilepath := filepath.Clean(os.Args[2])
 
 	if _, err := os.Stat(goModFilepath); err != nil {
 		log.Fatalf("File '%s' does not exist\n", goModFilepath)
 	}
 
+	if _, err := os.Stat(overridesFilepath); err != nil {
+		log.Fatalf("File '%s' does not exist\n", overridesFilepath)
+	}
+
 	var (
-		bytes []byte
-		err   error
+		bytes     []byte
+		overrides map[string]string
+		err       error
 	)
+
+	if bytes, err = os.ReadFile(overridesFilepath); err != nil {
+		log.Fatalf("Unable to read file '%s'\n", overridesFilepath)
+	}
+
+	if overrides, err = parseOverrides(string(bytes)); err != nil {
+		log.Fatalf("Parse error in file '%s': %s\n", overridesFilepath, err.Error())
+	}
+
 	if bytes, err = os.ReadFile(goModFilepath); err != nil {
 		log.Fatalf("Unable to read file '%s'\n", goModFilepath)
 	}
@@ -34,9 +50,41 @@ func main() {
 
 	for _, require := range file.Require {
 		if !require.Indirect {
-			fmt.Printf("go get %s &&\n", require.Mod.Path)
+			mod := require.Mod.Path
+			overrideMod, hasOverride := overrides[mod]
+			if hasOverride {
+				mod = overrideMod
+			}
+			fmt.Printf("go get %s &&\n", mod)
 		}
 	}
 
 	fmt.Printf("./hack/module.sh tidy\n")
 }
+
+func parseOverrides(overridesText string) (map[string]string, error) {
+	overridesMap := map[string]string{}
+
+	lines := strings.Split(overridesText, "\n")
+
+	for i, line := range lines {
+		trimmedLine := strings.TrimSpace(line)
+
+		if strings.HasPrefix(trimmedLine, "#") || len(trimmedLine) == 0 {
+			continue
+		}
+
+		splitLine := strings.Split(trimmedLine, " ")
+
+		if len(splitLine) != 2 {
+			return nil, fmt.Errorf(
+				"error on line %d: found %d tokens instead of 2 tokens",
+				i+1, len(splitLine),
+			)
+		}
+
+		overridesMap[splitLine[0]] = splitLine[1]
+	}
+
+	return overridesMap, nil
+}

hack/update-go-mod/overrides.conf

@@ -0,0 +1,5 @@
+# Format:
+# package_name_as_it_appears_in_go_mod package_name_as_it_should_be_used_with_go_get
+
+# Fosite has not had a release for a long time, so use the head of their main branch.
+github.com/ory/fosite github.com/ory/fosite@master

hack/update-go-mod/update-go-mod.sh

@@ -11,9 +11,12 @@ ROOT_DIR="$SCRIPT_DIR/../.."
 GO_MOD="${ROOT_DIR}/go.mod"
 
 pushd "${SCRIPT_DIR}" > /dev/null
-  script=$(go run . "${GO_MOD}")
+  script=$(go run . "${GO_MOD}" overrides.conf)
 popd > /dev/null
 
+# Print to screen for debugging purposes.
+echo "$script"
+
 pushd "${ROOT_DIR}" > /dev/null
   eval "$script"
 popd > /dev/null