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rtfiles.go
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rtfiles.go
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package config
import (
"errors"
"io/ioutil"
"log"
"os"
"path"
"path/filepath"
"regexp"
"strings"
rt "github.com/zyedidia/micro/v2/runtime"
)
const (
RTColorscheme = 0
RTSyntax = 1
RTHelp = 2
RTPlugin = 3
RTSyntaxHeader = 4
)
var (
NumTypes = 5 // How many filetypes are there
)
type RTFiletype int
// RuntimeFile allows the program to read runtime data like colorschemes or syntax files
type RuntimeFile interface {
// Name returns a name of the file without paths or extensions
Name() string
// Data returns the content of the file.
Data() ([]byte, error)
}
// allFiles contains all available files, mapped by filetype
var allFiles [][]RuntimeFile
var realFiles [][]RuntimeFile
func init() {
initRuntimeVars()
}
func initRuntimeVars() {
allFiles = make([][]RuntimeFile, NumTypes)
realFiles = make([][]RuntimeFile, NumTypes)
}
// NewRTFiletype creates a new RTFiletype
func NewRTFiletype() int {
NumTypes++
allFiles = append(allFiles, []RuntimeFile{})
realFiles = append(realFiles, []RuntimeFile{})
return NumTypes - 1
}
// some file on filesystem
type realFile string
// some asset file
type assetFile string
// some file on filesystem but with a different name
type namedFile struct {
realFile
name string
}
// a file with the data stored in memory
type memoryFile struct {
name string
data []byte
}
func (mf memoryFile) Name() string {
return mf.name
}
func (mf memoryFile) Data() ([]byte, error) {
return mf.data, nil
}
func (rf realFile) Name() string {
fn := filepath.Base(string(rf))
return fn[:len(fn)-len(filepath.Ext(fn))]
}
func (rf realFile) Data() ([]byte, error) {
return ioutil.ReadFile(string(rf))
}
func (af assetFile) Name() string {
fn := path.Base(string(af))
return fn[:len(fn)-len(path.Ext(fn))]
}
func (af assetFile) Data() ([]byte, error) {
return rt.Asset(string(af))
}
func (nf namedFile) Name() string {
return nf.name
}
// AddRuntimeFile registers a file for the given filetype
func AddRuntimeFile(fileType RTFiletype, file RuntimeFile) {
allFiles[fileType] = append(allFiles[fileType], file)
}
// AddRealRuntimeFile registers a file for the given filetype
func AddRealRuntimeFile(fileType RTFiletype, file RuntimeFile) {
allFiles[fileType] = append(allFiles[fileType], file)
realFiles[fileType] = append(realFiles[fileType], file)
}
// AddRuntimeFilesFromDirectory registers each file from the given directory for
// the filetype which matches the file-pattern
func AddRuntimeFilesFromDirectory(fileType RTFiletype, directory, pattern string) {
files, _ := ioutil.ReadDir(directory)
for _, f := range files {
if ok, _ := filepath.Match(pattern, f.Name()); !f.IsDir() && ok {
fullPath := filepath.Join(directory, f.Name())
AddRealRuntimeFile(fileType, realFile(fullPath))
}
}
}
// AddRuntimeFilesFromAssets registers each file from the given asset-directory for
// the filetype which matches the file-pattern
func AddRuntimeFilesFromAssets(fileType RTFiletype, directory, pattern string) {
files, err := rt.AssetDir(directory)
if err != nil {
return
}
assetLoop:
for _, f := range files {
if ok, _ := path.Match(pattern, f); ok {
af := assetFile(path.Join(directory, f))
for _, rf := range realFiles[fileType] {
if af.Name() == rf.Name() {
continue assetLoop
}
}
AddRuntimeFile(fileType, af)
}
}
}
// FindRuntimeFile finds a runtime file of the given filetype and name
// will return nil if no file was found
func FindRuntimeFile(fileType RTFiletype, name string) RuntimeFile {
for _, f := range ListRuntimeFiles(fileType) {
if f.Name() == name {
return f
}
}
return nil
}
// ListRuntimeFiles lists all known runtime files for the given filetype
func ListRuntimeFiles(fileType RTFiletype) []RuntimeFile {
return allFiles[fileType]
}
// ListRealRuntimeFiles lists all real runtime files (on disk) for a filetype
// these runtime files will be ones defined by the user and loaded from the config directory
func ListRealRuntimeFiles(fileType RTFiletype) []RuntimeFile {
return realFiles[fileType]
}
// InitRuntimeFiles initializes all assets files and the config directory.
// If `user` is false, InitRuntimeFiles ignores the config directory and
// initializes asset files only.
func InitRuntimeFiles(user bool) {
add := func(fileType RTFiletype, dir, pattern string) {
if user {
AddRuntimeFilesFromDirectory(fileType, filepath.Join(ConfigDir, dir), pattern)
}
AddRuntimeFilesFromAssets(fileType, path.Join("runtime", dir), pattern)
}
initRuntimeVars()
add(RTColorscheme, "colorschemes", "*.micro")
add(RTSyntax, "syntax", "*.yaml")
add(RTSyntaxHeader, "syntax", "*.hdr")
add(RTHelp, "help", "*.md")
}
// InitPlugins initializes the plugins
func InitPlugins() {
Plugins = Plugins[:0]
initlua := filepath.Join(ConfigDir, "init.lua")
if _, err := os.Stat(initlua); !os.IsNotExist(err) {
p := new(Plugin)
p.Name = "initlua"
p.DirName = "initlua"
p.Srcs = append(p.Srcs, realFile(initlua))
Plugins = append(Plugins, p)
}
// Search ConfigDir for plugin-scripts
plugdir := filepath.Join(ConfigDir, "plug")
files, _ := ioutil.ReadDir(plugdir)
isID := regexp.MustCompile(`^[_A-Za-z0-9]+$`).MatchString
for _, d := range files {
plugpath := filepath.Join(plugdir, d.Name())
if stat, err := os.Stat(plugpath); err == nil && stat.IsDir() {
srcs, _ := ioutil.ReadDir(plugpath)
p := new(Plugin)
p.Name = d.Name()
p.DirName = d.Name()
for _, f := range srcs {
if strings.HasSuffix(f.Name(), ".lua") {
p.Srcs = append(p.Srcs, realFile(filepath.Join(plugdir, d.Name(), f.Name())))
} else if strings.HasSuffix(f.Name(), ".json") {
data, err := ioutil.ReadFile(filepath.Join(plugdir, d.Name(), f.Name()))
if err != nil {
continue
}
p.Info, err = NewPluginInfo(data)
if err != nil {
continue
}
p.Name = p.Info.Name
}
}
if !isID(p.Name) || len(p.Srcs) <= 0 {
log.Println(p.Name, "is not a plugin")
continue
}
Plugins = append(Plugins, p)
}
}
plugdir = filepath.Join("runtime", "plugins")
if files, err := rt.AssetDir(plugdir); err == nil {
outer:
for _, d := range files {
for _, p := range Plugins {
if p.Name == d {
log.Println(p.Name, "built-in plugin overridden by user-defined one")
continue outer
}
}
if srcs, err := rt.AssetDir(filepath.Join(plugdir, d)); err == nil {
p := new(Plugin)
p.Name = d
p.DirName = d
p.Default = true
for _, f := range srcs {
if strings.HasSuffix(f, ".lua") {
p.Srcs = append(p.Srcs, assetFile(filepath.Join(plugdir, d, f)))
} else if strings.HasSuffix(f, ".json") {
data, err := rt.Asset(filepath.Join(plugdir, d, f))
if err != nil {
continue
}
p.Info, err = NewPluginInfo(data)
if err != nil {
continue
}
p.Name = p.Info.Name
}
}
if !isID(p.Name) || len(p.Srcs) <= 0 {
log.Println(p.Name, "is not a plugin")
continue
}
Plugins = append(Plugins, p)
}
}
}
}
// PluginReadRuntimeFile allows plugin scripts to read the content of a runtime file
func PluginReadRuntimeFile(fileType RTFiletype, name string) string {
if file := FindRuntimeFile(fileType, name); file != nil {
if data, err := file.Data(); err == nil {
return string(data)
}
}
return ""
}
// PluginListRuntimeFiles allows plugins to lists all runtime files of the given type
func PluginListRuntimeFiles(fileType RTFiletype) []string {
files := ListRuntimeFiles(fileType)
result := make([]string, len(files))
for i, f := range files {
result[i] = f.Name()
}
return result
}
// PluginAddRuntimeFile adds a file to the runtime files for a plugin
func PluginAddRuntimeFile(plugin string, filetype RTFiletype, filePath string) error {
pl := FindPlugin(plugin)
if pl == nil {
return errors.New("Plugin " + plugin + " does not exist")
}
pldir := pl.DirName
fullpath := filepath.Join(ConfigDir, "plug", pldir, filePath)
if _, err := os.Stat(fullpath); err == nil {
AddRealRuntimeFile(filetype, realFile(fullpath))
} else {
fullpath = path.Join("runtime", "plugins", pldir, filePath)
AddRuntimeFile(filetype, assetFile(fullpath))
}
return nil
}
// PluginAddRuntimeFilesFromDirectory adds files from a directory to the runtime files for a plugin
func PluginAddRuntimeFilesFromDirectory(plugin string, filetype RTFiletype, directory, pattern string) error {
pl := FindPlugin(plugin)
if pl == nil {
return errors.New("Plugin " + plugin + " does not exist")
}
pldir := pl.DirName
fullpath := filepath.Join(ConfigDir, "plug", pldir, directory)
if _, err := os.Stat(fullpath); err == nil {
AddRuntimeFilesFromDirectory(filetype, fullpath, pattern)
} else {
fullpath = path.Join("runtime", "plugins", pldir, directory)
AddRuntimeFilesFromAssets(filetype, fullpath, pattern)
}
return nil
}
// PluginAddRuntimeFileFromMemory adds a file to the runtime files for a plugin from a given string
func PluginAddRuntimeFileFromMemory(filetype RTFiletype, filename, data string) {
AddRealRuntimeFile(filetype, memoryFile{filename, []byte(data)})
}