chore(lint): update golangci-lint configuration to version 2

.golangci.yml

@@ -1,20 +1,30 @@
+version: "2"
 run:
-  timeout: 5m
   modules-download-mode: readonly
-
 linters:
-  disable-all: true
+  default: none
   enable:
     - errcheck
-    - goimports
-    - gofumpt
-    - revive # golint
-    - gosimple
     - govet
     - ineffassign
+    - revive
     - staticcheck
-
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
 issues:
-  exclude-use-default: false
   max-issues-per-linter: 0
   max-same-issues: 0
+formatters:
+  enable:
+    - gofumpt
+    - goimports
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1734424634,
-        "narHash": "sha256-cHar1vqHOOyC7f1+tVycPoWTfKIaqkoe1Q6TnKzuti4=",
+        "lastModified": 1760878510,
+        "narHash": "sha256-K5Osef2qexezUfs0alLvZ7nQFTGS9DL2oTVsIXsqLgs=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "d3c42f187194c26d9f0309a8ecc469d6c878ce33",
+        "rev": "5e2a59a5b1a82f89f2c7e598302a9cacebb72a67",
         "type": "github"
       },
       "original": {

xtemplate/hot.go

@@ -0,0 +1,283 @@
+package xtemplate
+
+import (
+	"errors"
+	"fmt"
+	htmltemplate "html/template"
+	"io"
+	"io/fs"
+	"slices"
+	"text/template"
+	"text/template/parse"
+)
+
+func NewHot[T template.Template | htmltemplate.Template](name string) *HotTemplate {
+	return Hot(New[T](name))
+}
+
+func Hot(t Template) *HotTemplate {
+	return &HotTemplate{template: t}
+}
+
+type HotTemplate struct {
+	template    Template
+	err         error
+	methodQueue []struct {
+		name methodName
+		args []any
+	}
+}
+
+var _ Template = (*HotTemplate)(nil)
+
+func (t *HotTemplate) AddParseTree(name string, tree *parse.Tree) (Template, error) {
+	return t.queue(methodAddParseTree, []any{name, tree})
+}
+
+func (t *HotTemplate) Clone() (Template, error) {
+	return t.clone()
+}
+
+func (t *HotTemplate) DefinedTemplates() string {
+	temp, err := t.run()
+	if err != nil {
+		return ""
+	}
+	return temp.DefinedTemplates()
+}
+
+func (t *HotTemplate) Delims(left, right string) Template {
+	t, _ = t.queue(methodDelims, []any{left, right})
+	return t
+}
+
+func (t *HotTemplate) Execute(wr io.Writer, data any) error {
+	temp, err := t.run()
+	if err != nil {
+		return errors.Join(ErrHotRun, err)
+	}
+	return temp.Execute(wr, data)
+}
+
+func (t *HotTemplate) ExecuteTemplate(wr io.Writer, name string, data any) error {
+	temp, err := t.run()
+	if err != nil {
+		return errors.Join(ErrHotRun, err)
+	}
+	return temp.ExecuteTemplate(wr, name, data)
+}
+
+func (t *HotTemplate) Funcs(funcMap template.FuncMap) Template {
+	t, _ = t.queue(methodFuncs, funcMap)
+	return t
+}
+
+func (t *HotTemplate) Lookup(name string) Template {
+	temp, err := t.run()
+	if err != nil {
+		return nil
+	}
+	return temp.Lookup(name)
+}
+
+func (t *HotTemplate) Name() string {
+	temp, err := t.run()
+	if err != nil {
+		return ""
+	}
+	return temp.Name()
+}
+
+func (t *HotTemplate) New(name string) Template {
+	temp, err := t.run()
+	if err != nil {
+		return nil
+	}
+	return Hot(temp.New(name))
+}
+
+func (t *HotTemplate) Option(opt ...string) Template {
+	t, _ = t.queue(methodOption, opt)
+	return t
+}
+
+func (t *HotTemplate) Parse(text string) (Template, error) {
+	return t.queue(methodParse, text)
+}
+
+func (t *HotTemplate) ParseFS(fs fs.FS, patterns ...string) (Template, error) {
+	return t.queue(methodParseFS, fs, patterns)
+}
+
+func (t *HotTemplate) ParseFiles(filenames ...string) (Template, error) {
+	return t.queue(methodParseFiles, filenames)
+}
+
+func (t *HotTemplate) ParseGlob(pattern string) (Template, error) {
+	return t.queue(methodParseGlob, pattern)
+}
+
+func (t *HotTemplate) Templates() []Template {
+	temp, err := t.run()
+	if err != nil {
+		return nil
+	}
+
+	ts := temp.Templates()
+	hts := make([]Template, len(ts))
+	for i := range ts {
+		hts[i] = Hot(ts[i])
+	}
+	return hts
+}
+
+func (t *HotTemplate) queue(method methodName, args ...any) (*HotTemplate, error) {
+	tc, err := t.clone()
+	if err != nil {
+		// HACK: Storing the error so it can be returned on methods that can
+		t.err = errors.Join(ErrHotQueue, err)
+		return t, err
+	}
+	tc.methodQueue = append(t.methodQueue, struct {
+		name methodName
+		args []any
+	}{
+		name: method,
+		args: args,
+	})
+	return tc, nil
+}
+
+func (t *HotTemplate) clone() (*HotTemplate, error) {
+	temp, err := t.template.Clone()
+	if err != nil {
+		return nil, fmt.Errorf("HotTemplate: unable to clone template: %w", err)
+	}
+
+	return &HotTemplate{
+		template:    temp,
+		methodQueue: slices.Clone(t.methodQueue),
+	}, nil
+}
+
+func (t *HotTemplate) run() (Template, error) {
+	if t.err != nil {
+		return t, fmt.Errorf("HotTemplate: template has a past error: %w", t.err)
+	}
+
+	temp, err := t.template.Clone()
+	if err != nil {
+		return temp, fmt.Errorf("HotTemplate: unable to clone template: %w", err)
+	}
+
+	for _, method := range t.methodQueue {
+		switch method.name {
+		case methodAddParseTree:
+			name, ok := method.args[0].(string)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: first argument is not of type string")
+				break
+			}
+			tree, ok := method.args[1].(*parse.Tree)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: second argument is not of type *parse.Tree")
+				break
+			}
+			temp, err = temp.AddParseTree(name, tree)
+
+		case methodDelims:
+			left, ok := method.args[0].(string)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: first argument is not of type string")
+				break
+			}
+			right, ok := method.args[1].(string)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: second argument is not of type string")
+				break
+			}
+			temp = temp.Delims(left, right)
+
+		case methodFuncs:
+			funcMap, ok := method.args[0].(template.FuncMap)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: first argument is not of type template.FuncMap")
+				break
+			}
+			temp = temp.Funcs(funcMap)
+
+		case methodOption:
+			opt, ok := method.args[0].([]string)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: first argument is not of type []string")
+				break
+			}
+			temp = temp.Option(opt...)
+
+		case methodParse:
+			text, ok := method.args[0].(string)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: first argument is not of type string")
+				break
+			}
+			temp, err = temp.Parse(text)
+
+		case methodParseFS:
+			fs, ok := method.args[0].(fs.FS)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: first argument is not of type fs.FS")
+				break
+			}
+			patterns, ok := method.args[0].([]string)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: second argument is not of type []string")
+				break
+			}
+			temp, err = temp.ParseFS(fs, patterns...)
+
+		case methodParseFiles:
+			filenames, ok := method.args[0].([]string)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: first argument is not of type []string")
+				break
+			}
+			temp, err = temp.ParseFiles(filenames...)
+
+		case methodParseGlob:
+			pattern, ok := method.args[0].(string)
+			if !ok {
+				err = fmt.Errorf("HotTemplate: first argument is not of type string")
+				break
+			}
+			temp, err = temp.ParseGlob(pattern)
+
+		default:
+			err = fmt.Errorf("HotTemplate: method %q does not exist", method.name)
+		}
+
+		if err != nil {
+			return temp, fmt.Errorf("HotTemplate: failed to run method %q with arguments %v: %w",
+				method.name, method.args, err)
+		}
+	}
+
+	return temp, nil
+}
+
+const (
+	methodAddParseTree methodName = "AddParseTree"
+	methodDelims       methodName = "Delims"
+	methodFuncs        methodName = "Funcs"
+	methodOption       methodName = "Option"
+	methodParse        methodName = "Parse"
+	methodParseFS      methodName = "ParseFS"
+	methodParseFiles   methodName = "ParseFiles"
+	methodParseGlob    methodName = "ParseGlob"
+)
+
+type methodName string
+
+var (
+	ErrHotRun   = errors.New("HotTemplate: unable to run queued methods")
+	ErrHotQueue = errors.New("HotTemplate: unable to queue method")
+)