github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572: FuncMap, TxtFuncMap, HtmlFuncMap

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify pkg:golang/github.com/go-task/slim-sprig@v0.0.0-20230315185526-52ccab3ef572
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/go-task/slim-sprig@v0.0.0-20230315185526-52ccab3ef572
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:2103b1715034cde2072c2517e2ac980babc8221915c6022621e1643f98ebbba2","contract":["sprig.FuncMap produces template.FuncMap containing string, math, collection, and serialization helper functions","sprig.TxtFuncMap and sprig.HtmlFuncMap produce helper maps for text/template and html/template","sprig.GenericFuncMap returns map of sprig helper functions without html/template or text/template dependencies","sprig.HermeticTxtFuncMap and sprig.HermeticHtmlFuncMap provide deterministic helper maps excluding environment and clock functions","template execution uses sprig helper functions for string trimming, uppercase conversion, defaults, lists, dicts, and base64 encoding"],"goal":"verify pkg:golang/github.com/go-task/slim-sprig@v0.0.0-20230315185526-52ccab3ef572","kind":"HOW","packages":["pkg:golang/github.com/go-task/slim-sprig@v0.0.0-20230315185526-52ccab3ef572"],"schemaVersion":1,"symbols":["github.com/go-task/slim-sprig.FuncMap","github.com/go-task/slim-sprig.TxtFuncMap","github.com/go-task/slim-sprig.HtmlFuncMap","github.com/go-task/slim-sprig.GenericFuncMap","github.com/go-task/slim-sprig.HermeticTxtFuncMap","github.com/go-task/slim-sprig.HermeticHtmlFuncMap"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","language":"go","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","packageManagerVersion":"1.26.6","runtime":"go","runtimeVersion":"1.26.6","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/github.com/go-task/slim-sprig@v0.0.0-20230315185526-52ccab3ef572"],"schemaVersion":1,"subject":"pkg:golang/github.com/go-task/slim-sprig@v0.0.0-20230315185526-52ccab3ef572","symbols":["github.com/go-task/slim-sprig.FuncMap","github.com/go-task/slim-sprig.TxtFuncMap","github.com/go-task/slim-sprig.HtmlFuncMap","github.com/go-task/slim-sprig.GenericFuncMap","github.com/go-task/slim-sprig.HermeticTxtFuncMap","github.com/go-task/slim-sprig.HermeticHtmlFuncMap"],"verifierAdapter":"golang@1"}

module sample

go 1.26.6

require github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572

github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 h1:tfuBGBXKqDEevZMzYi5KSi8KkcZtzBcTgAUUtapy0OI=
github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

{
  "schemaVersion": 1,
  "goal": "verify pkg:golang/github.com/go-task/slim-sprig@v0.0.0-20230315185526-52ccab3ef572",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/go-task/slim-sprig@v0.0.0-20230315185526-52ccab3ef572"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

package main

import (
	"bytes"
	"fmt"
	htemplate "html/template"
	"os"
	"strings"
	ttemplate "text/template"

	sprig "github.com/go-task/slim-sprig"
)

func main() {
	if err := runTests(); err != nil {
		fmt.Fprintf(os.Stderr, "Contract test failed: %v\n", err)
		os.Exit(1)
	}
	fmt.Println("All contract tests passed successfully.")
}

func runTests() error {
	// 1. Test sprig.FuncMap returns template.FuncMap containing core helper functions
	fm := sprig.FuncMap()
	if fm == nil || len(fm) == 0 {
		return fmt.Errorf("sprig.FuncMap() returned empty or nil map")
	}

	requiredKeys := []string{
		"trim", "upper", "lower", "default", "list", "dict",
		"join", "split", "toJson", "fromJson", "add", "mul",
		"coalesce", "hasKey", "keys", "values", "b64enc", "b64dec", "sha256sum",
	}
	for _, key := range requiredKeys {
		if _, ok := fm[key]; !ok {
			return fmt.Errorf("sprig.FuncMap missing required key %q", key)
		}
	}

	// 2. Test sprig.TxtFuncMap and sprig.HtmlFuncMap provide template helper maps
	txtFm := sprig.TxtFuncMap()
	if txtFm == nil || len(txtFm) == 0 {
		return fmt.Errorf("sprig.TxtFuncMap() returned empty or nil map")
	}
	htmlFm := sprig.HtmlFuncMap()
	if htmlFm == nil || len(htmlFm) == 0 {
		return fmt.Errorf("sprig.HtmlFuncMap() returned empty or nil map")
	}

	// 3. Test sprig.GenericFuncMap returns map of sprig helper functions without template dependencies
	gfm := sprig.GenericFuncMap()
	if gfm == nil || len(gfm) == 0 {
		return fmt.Errorf("sprig.GenericFuncMap() returned empty or nil map")
	}
	for _, key := range requiredKeys {
		if _, ok := gfm[key]; !ok {
			return fmt.Errorf("sprig.GenericFuncMap missing required key %q", key)
		}
	}

	// 4. Test sprig.HermeticTxtFuncMap and sprig.HermeticHtmlFuncMap provide deterministic helper maps
	hermeticTxt := sprig.HermeticTxtFuncMap()
	if hermeticTxt == nil || len(hermeticTxt) == 0 {
		return fmt.Errorf("sprig.HermeticTxtFuncMap() returned empty or nil map")
	}
	hermeticHtml := sprig.HermeticHtmlFuncMap()
	if hermeticHtml == nil || len(hermeticHtml) == 0 {
		return fmt.Errorf("sprig.HermeticHtmlFuncMap() returned empty or nil map")
	}
	if _, ok := hermeticTxt["env"]; ok {
		return fmt.Errorf("sprig.HermeticTxtFuncMap should not contain 'env'")
	}
	if _, ok := hermeticTxt["expandenv"]; ok {
		return fmt.Errorf("sprig.HermeticTxtFuncMap should not contain 'expandenv'")
	}

	// 5. Test text/template execution using sprig helper functions
	tmplText := `{{ "  hello world  " | trim | upper }}|{{ "" | default "fallback" }}|{{ list "a" "b" "c" | join "-" }}|{{ add 10 5 }}|{{ mul 4 3 }}|{{ "hello" | b64enc }}|{{ "aGVsbG8=" | b64dec }}|{{ "test" | sha256sum }}`
	tmpl, err := ttemplate.New("test").Funcs(fm).Parse(tmplText)
	if err != nil {
		return fmt.Errorf("text/template parse failed: %w", err)
	}

	var buf bytes.Buffer
	if err := tmpl.Execute(&buf, nil); err != nil {
		return fmt.Errorf("text/template execute failed: %w", err)
	}

	expectedParts := []string{
		"HELLO WORLD",
		"fallback",
		"a-b-c",
		"15",
		"12",
		"aGVsbG8=",
		"hello",
		"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
	}
	gotOutput := buf.String()
	expectedOutput := strings.Join(expectedParts, "|")
	if gotOutput != expectedOutput {
		return fmt.Errorf("template output mismatch:\n got:  %q\n want: %q", gotOutput, expectedOutput)
	}

	// 6. Test dict, keys, hasKey, and JSON serialization in template
	dictTmplText := `{{ $d := dict "name" "sample" "count" 42 }}{{ hasKey $d "name" }}|{{ get $d "count" }}|{{ $d | toJson }}`
	dictTmpl, err := ttemplate.New("dictTest").Funcs(fm).Parse(dictTmplText)
	if err != nil {
		return fmt.Errorf("dict template parse failed: %w", err)
	}

	var dictBuf bytes.Buffer
	if err := dictTmpl.Execute(&dictBuf, nil); err != nil {
		return fmt.Errorf("dict template execute failed: %w", err)
	}

	dictOutput := dictBuf.String()
	if !strings.HasPrefix(dictOutput, "true|42|") {
		return fmt.Errorf("dict template output unexpected: %q", dictOutput)
	}

	// 7. Test html/template execution with HtmlFuncMap
	htmlTmplText := `<b>{{ .Name | upper | html }}</b>`
	htmlTmpl, err := htemplate.New("htmlTest").Funcs(htmlFm).Parse(htmlTmplText)
	if err != nil {
		return fmt.Errorf("html/template parse failed: %w", err)
	}

	var htmlBuf bytes.Buffer
	if err := htmlTmpl.Execute(&htmlBuf, map[string]string{"Name": "<safe & sound>"}); err != nil {
		return fmt.Errorf("html/template execute failed: %w", err)
	}
	expectedHTML := `<b>&lt;SAFE &amp; SOUND&gt;</b>`
	if htmlBuf.String() != expectedHTML {
		return fmt.Errorf("html/template output mismatch: got %q, want %q", htmlBuf.String(), expectedHTML)
	}

	// 8. Test direct generic function execution from GenericFuncMap
	upperFn, ok := gfm["upper"].(func(string) string)
	if !ok {
		return fmt.Errorf("gfm['upper'] is not func(string) string (got %T)", gfm["upper"])
	}
	if got := upperFn("sprig"); got != "SPRIG" {
		return fmt.Errorf("gfm['upper']('sprig') = %q, want 'SPRIG'", got)
	}

	b64encFn, ok := gfm["b64enc"].(func(string) string)
	if !ok {
		return fmt.Errorf("gfm['b64enc'] is not func(string) string (got %T)", gfm["b64enc"])
	}
	if got := b64encFn("data"); got != "ZGF0YQ==" {
		return fmt.Errorf("gfm['b64enc']('data') = %q, want 'ZGF0YQ=='", got)
	}

	return nil
}