fixed output file names in html pages, fixed amber function bindings, replaced print command with build, fixed plugin functions, implemented zs and exec functions

This commit is contained in:
Serge A. Zaitsev 2015-08-30 14:20:35 +02:00
parent 80561bf9cc
commit 9d486cc767
4 changed files with 278 additions and 213 deletions

271
zs.go
View File

@ -7,7 +7,6 @@ import (
"io/ioutil"
"log"
"os"
"os/exec"
"path"
"path/filepath"
"strings"
@ -25,17 +24,7 @@ const (
)
type Vars map[string]string
// Splits a string in exactly two parts by delimiter
// If no delimiter is found - the second string is be empty
func split2(s, delim string) (string, string) {
parts := strings.SplitN(s, delim, 2)
if len(parts) == 2 {
return parts[0], parts[1]
} else {
return parts[0], ""
}
}
type Funcs template.FuncMap
// Parses markdown content. Returns parsed header variables and content
func md(path string, globals Vars) (Vars, string, error) {
@ -77,15 +66,26 @@ func md(path string, globals Vars) (Vars, string, error) {
}
// Use standard Go templates
func render(s string, funcs template.FuncMap, vars Vars) (string, error) {
f := template.FuncMap{}
func render(s string, funcs Funcs, vars Vars) (string, error) {
f := Funcs{}
for k, v := range funcs {
f[k] = v
}
for k, v := range vars {
f[k] = varFunc(v)
}
tmpl, err := template.New("").Funcs(f).Parse(s)
// Plugin functions
files, _ := ioutil.ReadDir(ZSDIR)
for _, file := range files {
if !file.IsDir() {
name := file.Name()
if !strings.HasSuffix(name, ".html") && !strings.HasSuffix(name, ".amber") {
f[strings.TrimSuffix(name, filepath.Ext(name))] = pluginFunc(name, vars)
}
}
}
tmpl, err := template.New("").Funcs(template.FuncMap(f)).Parse(s)
if err != nil {
return "", err
}
@ -96,60 +96,8 @@ func render(s string, funcs template.FuncMap, vars Vars) (string, error) {
return string(out.Bytes()), nil
}
// Converts zs markdown variables into environment variables
func env(vars Vars) []string {
env := []string{"ZS=" + os.Args[0], "ZS_OUTDIR=" + PUBDIR}
env = append(env, os.Environ()...)
if vars != nil {
for k, v := range vars {
env = append(env, "ZS_"+strings.ToUpper(k)+"="+v)
}
}
return env
}
// Runs command with given arguments and variables, intercepts stderr and
// redirects stdout into the given writer
func run(cmd string, args []string, vars Vars, output io.Writer) error {
var errbuf bytes.Buffer
c := exec.Command(cmd, args...)
c.Env = env(vars)
c.Stdout = output
c.Stderr = &errbuf
err := c.Run()
if errbuf.Len() > 0 {
log.Println("ERROR:", errbuf.String())
}
if err != nil {
return err
}
return nil
}
// Expands macro: either replacing it with the variable value, or
// running the plugin command and replacing it with the command's output
func eval(cmd []string, vars Vars) (string, error) {
outbuf := bytes.NewBuffer(nil)
err := run(path.Join(ZSDIR, cmd[0]), cmd[1:], vars, outbuf)
if err != nil {
if _, ok := err.(*exec.ExitError); ok {
return "", err
}
outbuf = bytes.NewBuffer(nil)
err := run(cmd[0], cmd[1:], vars, outbuf)
// Return exit errors, but ignore if the command was not found
if _, ok := err.(*exec.ExitError); ok {
return "", err
}
}
return outbuf.String(), nil
}
// Renders markdown with the given layout into html expanding all the macros
func buildMarkdown(path string, funcs template.FuncMap, vars Vars) error {
func buildMarkdown(path string, w io.Writer, funcs Funcs, vars Vars) error {
v, body, err := md(path, vars)
if err != nil {
return err
@ -159,18 +107,24 @@ func buildMarkdown(path string, funcs template.FuncMap, vars Vars) error {
return err
}
v["content"] = string(blackfriday.MarkdownBasic([]byte(content)))
if w == nil {
out, err := os.Create(filepath.Join(PUBDIR, renameExt(path, "", ".html")))
if err != nil {
return err
}
defer out.Close()
w = out
}
if strings.HasSuffix(v["layout"], ".amber") {
return buildAmber(filepath.Join(ZSDIR, v["layout"]),
renameExt(path, "", ".html"), funcs, v)
return buildAmber(filepath.Join(ZSDIR, v["layout"]), w, funcs, v)
} else {
return buildPlain(filepath.Join(ZSDIR, v["layout"]),
renameExt(path, "", ".html"), funcs, v)
return buildHTML(filepath.Join(ZSDIR, v["layout"]), w, funcs, v)
}
}
// Renders text file expanding all variable macros inside it
func buildPlain(in, out string, funcs template.FuncMap, vars Vars) error {
b, err := ioutil.ReadFile(in)
func buildHTML(path string, w io.Writer, funcs Funcs, vars Vars) error {
b, err := ioutil.ReadFile(path)
if err != nil {
return err
}
@ -178,7 +132,7 @@ func buildPlain(in, out string, funcs template.FuncMap, vars Vars) error {
if err != nil {
return err
}
output := filepath.Join(PUBDIR, out)
output := filepath.Join(PUBDIR, path)
if s, ok := vars["output"]; ok {
output = s
}
@ -190,9 +144,9 @@ func buildPlain(in, out string, funcs template.FuncMap, vars Vars) error {
}
// Renders .amber file into .html
func buildAmber(in, out string, funcs template.FuncMap, vars Vars) error {
func buildAmber(path string, w io.Writer, funcs Funcs, vars Vars) error {
a := amber.New()
err := a.ParseFile(in)
err := a.ParseFile(path)
if err != nil {
return err
}
@ -200,110 +154,80 @@ func buildAmber(in, out string, funcs template.FuncMap, vars Vars) error {
if err != nil {
return err
}
//amber.FuncMap = amber.FuncMap
f, err := os.Create(filepath.Join(PUBDIR, out))
if w == nil {
f, err := os.Create(filepath.Join(PUBDIR, renameExt(path, ".amber", ".html")))
if err != nil {
return err
}
defer f.Close()
return t.Execute(f, vars)
w = f
}
return t.Execute(w, vars)
}
// Compiles .gcss into .css
func buildGCSS(path string) error {
func buildGCSS(path string, w io.Writer) error {
f, err := os.Open(path)
if err != nil {
return err
}
defer f.Close()
if w == nil {
s := strings.TrimSuffix(path, ".gcss") + ".css"
css, err := os.Create(filepath.Join(PUBDIR, s))
if err != nil {
return err
}
defer f.Close()
defer css.Close()
_, err = gcss.Compile(css, f)
w = css
}
_, err = gcss.Compile(w, f)
return err
}
// Copies file from working directory into public directory
func copyFile(path string) (err error) {
var in, out *os.File
if in, err = os.Open(path); err == nil {
// Copies file as is from path to writer
func buildRaw(path string, w io.Writer) error {
in, err := os.Open(path)
if err != nil {
return err
}
defer in.Close()
if out, err = os.Create(filepath.Join(PUBDIR, path)); err == nil {
if w == nil {
if out, err := os.Create(filepath.Join(PUBDIR, path)); err != nil {
return err
} else {
defer out.Close()
_, err = io.Copy(out, in)
w = out
}
}
_, err = io.Copy(w, in)
return err
}
func varFunc(s string) func() string {
return func() string {
return s
func build(path string, w io.Writer, funcs Funcs, vars Vars) error {
ext := filepath.Ext(path)
if ext == ".md" || ext == ".mkd" {
return buildMarkdown(path, w, funcs, vars)
} else if ext == ".html" || ext == ".xml" {
return buildHTML(path, w, funcs, vars)
} else if ext == ".amber" {
return buildAmber(path, w, funcs, vars)
} else if ext == ".gcss" {
return buildGCSS(path, w)
} else {
return buildRaw(path, w)
}
}
func pluginFunc(cmd string) func() string {
return func() string {
return "Not implemented yet"
}
}
func createFuncs() template.FuncMap {
// Builtin functions
funcs := template.FuncMap{
"exec": func(s ...string) string {
// Run external command with arguments
return ""
},
"zs": func(args ...string) string {
// Run zs with arguments
return ""
},
}
// Plugin functions
files, _ := ioutil.ReadDir(ZSDIR)
for _, f := range files {
if !f.IsDir() {
name := f.Name()
if !strings.HasSuffix(name, ".html") && !strings.HasSuffix(name, ".amber") {
funcs[strings.TrimSuffix(name, filepath.Ext(name))] = pluginFunc(name)
}
}
}
return funcs
}
func renameExt(path, from, to string) string {
if from == "" {
from = filepath.Ext(path)
}
return strings.TrimSuffix(path, from) + to
}
func globals() Vars {
vars := Vars{}
for _, e := range os.Environ() {
pair := strings.Split(e, "=")
if strings.HasPrefix(pair[0], "ZS_") {
vars[strings.ToLower(pair[0][3:])] = pair[1]
}
}
return vars
}
func buildAll(once bool) {
func buildAll(watch bool) {
lastModified := time.Unix(0, 0)
modified := false
vars := globals()
for {
os.Mkdir(PUBDIR, 0755)
funcs := createFuncs()
funcs := builtins()
err := filepath.Walk(".", func(path string, info os.FileInfo, err error) error {
// ignore hidden files and directories
if filepath.Base(path)[0] == '.' || strings.HasPrefix(path, ".") {
@ -320,23 +244,8 @@ func buildAll(once bool) {
run(filepath.Join(ZSDIR, "pre"), []string{}, nil, nil)
modified = true
}
ext := filepath.Ext(path)
if ext == ".md" || ext == ".mkd" {
log.Println("md: ", path)
return buildMarkdown(path, funcs, vars)
} else if ext == ".html" || ext == ".xml" {
log.Println("html: ", path)
return buildPlain(path, path, funcs, vars)
} else if ext == ".amber" {
log.Println("html: ", path)
return buildAmber(path, renameExt(path, ".amber", ".html"), funcs, vars)
} else if ext == ".gcss" {
log.Println("css: ", path)
return buildGCSS(path)
} else {
log.Println("raw: ", path)
return copyFile(path)
}
log.Println("build: ", path)
return build(path, nil, funcs, vars)
}
return nil
})
@ -349,10 +258,10 @@ func buildAll(once bool) {
run(filepath.Join(ZSDIR, "post"), []string{}, nil, nil)
modified = false
}
lastModified = time.Now()
if once {
if !watch {
break
}
lastModified = time.Now()
time.Sleep(1 * time.Second)
}
}
@ -366,27 +275,23 @@ func main() {
args := os.Args[2:]
switch cmd {
case "build":
buildAll(true)
buildAll(false)
case "watch":
buildAll(false) // pass duration
buildAll(true)
case "print":
if len(args) != 1 {
fmt.Println("ERROR: filename expected")
} else {
build(args[0], os.Stdout, builtins(), globals())
}
case "var":
if len(args) == 0 {
log.Println("ERROR: filename expected")
return
}
if vars, _, err := md(args[0], globals()); err == nil {
if len(args) > 1 {
for _, a := range args[1:] {
fmt.Println(vars[a])
}
} else {
for k, v := range vars {
fmt.Println(k + ":" + v)
}
}
} else {
log.Println("ERROR:", err)
}
fmt.Println(Var(args))
case "lorem":
fmt.Println(Lorem(args))
case "dateparse":
fmt.Println(DateParse(args))
case "datefmt":
fmt.Println(DateFmt(args))
default:
err := run(path.Join(ZSDIR, cmd), args, Vars{}, os.Stdout)
if err != nil {

72
zs_ext.go Normal file
View File

@ -0,0 +1,72 @@
package main
import (
"strconv"
"strings"
"time"
"github.com/drhodes/golorem"
)
// zs var <filename> -- returns list of variables and their values
// zs var <filename> <var...> -- returns list of variable values
func Var(args []string) string {
if len(args) == 0 {
return "var: filename expected"
} else {
s := ""
if vars, _, err := md(args[0], globals()); err != nil {
return "var: " + err.Error()
} else {
if len(args) > 1 {
for _, a := range args[1:] {
s = s + vars[a] + "\n"
}
} else {
for k, v := range vars {
s = s + k + ":" + v + "\n"
}
}
}
return strings.TrimSpace(s)
}
}
// zs lorem <n> -- returns <n> random lorem ipsum sentences
func Lorem(args []string) string {
if len(args) > 1 {
return "lorem: invalid usage"
}
if len(args) == 0 {
return lorem.Paragraph(5, 5)
}
if n, err := strconv.Atoi(args[0]); err == nil {
return lorem.Paragraph(n, n)
} else {
return "lorem: " + err.Error()
}
}
// zs datefmt <fmt> <date> -- returns formatted date from unix time
func DateFmt(args []string) string {
if len(args) == 0 || len(args) > 2 {
return "datefmt: invalid usage"
}
if n, err := strconv.ParseInt(args[1], 10, 64); err == nil {
return time.Unix(n, 0).Format(args[0])
} else {
return "datefmt: " + err.Error()
}
}
// zs dateparse <fmt> <date> -- returns unix time from the formatted date
func DateParse(args []string) string {
if len(args) == 0 || len(args) > 2 {
return "dateparse: invalid usage"
}
if d, err := time.Parse(args[0], args[1]); err != nil {
return "dateparse: " + err.Error()
} else {
return strconv.FormatInt(d.Unix(), 10)
}
}

View File

@ -6,10 +6,8 @@ import (
"io/ioutil"
"log"
"os"
"os/exec"
"strings"
"testing"
"text/template"
)
func TestSplit2(t *testing.T) {
@ -78,7 +76,7 @@ this: is a content`), Vars{})
func TestRender(t *testing.T) {
vars := map[string]string{"foo": "bar"}
funcs := template.FuncMap{
funcs := Funcs{
"greet": func(s ...string) string {
if len(s) == 0 {
return "hello"
@ -138,24 +136,6 @@ func TestRun(t *testing.T) {
}
}
func TestEvalCommand(t *testing.T) {
s, err := eval([]string{"echo", "hello"}, map[string]string{})
if err != nil {
t.Error(err)
}
if s != "hello\n" {
t.Error(s)
}
_, err = eval([]string{"cat", "bogus/file"}, map[string]string{})
if _, ok := err.(*exec.ExitError); !ok {
t.Error("expected ExitError")
}
_, err = eval([]string{"missing command"}, map[string]string{})
if err != nil {
t.Error("missing command should be ignored")
}
}
func TestHelperProcess(*testing.T) {
if os.Getenv("ZS_HELPER") != "1" {
return

108
zs_util.go Normal file
View File

@ -0,0 +1,108 @@
package main
import (
"bytes"
"io"
"log"
"os"
"os/exec"
"path/filepath"
"strings"
)
func varFunc(s string) func() string {
return func() string {
return s
}
}
func pluginFunc(cmd string, vars Vars) func(args ...string) string {
return func(args ...string) string {
out := bytes.NewBuffer(nil)
if err := run(cmd, args, vars, out); err != nil {
return cmd + ":" + err.Error()
} else {
return string(out.Bytes())
}
}
}
func builtins() Funcs {
exec := func(s ...string) string {
return ""
}
return Funcs{
"exec": exec,
"zs": func(args ...string) string {
cmd := []string{"zs"}
cmd = append(cmd, args...)
return exec(cmd...)
},
}
}
func renameExt(path, from, to string) string {
if from == "" {
from = filepath.Ext(path)
}
if strings.HasSuffix(path, from) {
return strings.TrimSuffix(path, from) + to
} else {
return path
}
}
func globals() Vars {
vars := Vars{}
for _, e := range os.Environ() {
pair := strings.Split(e, "=")
if strings.HasPrefix(pair[0], "ZS_") {
vars[strings.ToLower(pair[0][3:])] = pair[1]
}
}
return vars
}
// Converts zs markdown variables into environment variables
func env(vars Vars) []string {
env := []string{"ZS=" + os.Args[0], "ZS_OUTDIR=" + PUBDIR}
env = append(env, os.Environ()...)
if vars != nil {
for k, v := range vars {
env = append(env, "ZS_"+strings.ToUpper(k)+"="+v)
}
}
return env
}
// Runs command with given arguments and variables, intercepts stderr and
// redirects stdout into the given writer
func run(cmd string, args []string, vars Vars, output io.Writer) error {
var errbuf bytes.Buffer
c := exec.Command(cmd, args...)
c.Env = env(vars)
c.Stdout = output
c.Stderr = &errbuf
err := c.Run()
if errbuf.Len() > 0 {
log.Println("ERROR:", errbuf.String())
}
if err != nil {
return err
}
return nil
}
// Splits a string in exactly two parts by delimiter
// If no delimiter is found - the second string is be empty
func split2(s, delim string) (string, string) {
parts := strings.SplitN(s, delim, 2)
if len(parts) == 2 {
return parts[0], parts[1]
} else {
return parts[0], ""
}
}