Method setPatch

internal/devconfig/configfile/ast.go:250–283

setPatch sets the patch field of the named package.

(name string, mode PatchMode)

// setPatch sets the patch field of the named package.
func (c *configAST) setPatch(name string, mode PatchMode) {
	pkgObject := c.findPkgObject(name)
	if pkgObject == nil {
		return
	}

	glibcIndex := c.memberIndex(pkgObject, "patch_glibc") // deprecated
	patchIndex := c.memberIndex(pkgObject, "patch")
	switch {
	// Neither patch_glibc or patch exist - append a new field.
	case patchIndex == -1 && glibcIndex == -1:
		pkgObject.Members = append(pkgObject.Members, hujson.ObjectMember{
			Name: hujson.Value{
				BeforeExtra: []byte{'\n'},
			},
		})
		patchIndex = len(pkgObject.Members) - 1
		defer c.root.Format()
	// patch_glibc exists and patch doesn't - rename patch_glibc to
	// preserve formatting/comments.
	case patchIndex == -1 && glibcIndex != -1:
		patchIndex = glibcIndex
	// Both patch_glibc and patch exist - delete patch_glibc.
	case patchIndex != -1 && glibcIndex != -1:
		pkgObject.Members = slices.Delete(pkgObject.Members, glibcIndex, glibcIndex+1)
		if patchIndex > glibcIndex {
			patchIndex--
		}
		defer c.root.Format()
	}

	pkgObject.Members[patchIndex].Name.Value = hujson.String("patch")
	pkgObject.Members[patchIndex].Value.Value = hujson.String(string(mode))
}

func (c *configAST) findPkgObject(name string) *hujson.Object {
	pkgs := c.packagesField(true).Value.Value.(*hujson.Object)