470 lines
12 KiB
Go
470 lines
12 KiB
Go
package config
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"net/url"
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"os"
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"os/exec"
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"path"
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"regexp"
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"sort"
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"strings"
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"unicode"
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"github.com/gdamore/tcell"
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"github.com/go-ini/ini"
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"github.com/kyoh86/xdg"
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)
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type GeneralConfig struct {
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DefaultSavePath string `ini:"default-save-path"`
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}
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type UIConfig struct {
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IndexFormat string `ini:"index-format"`
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TimestampFormat string `ini:"timestamp-format"`
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ShowHeaders []string `delim:","`
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RenderAccountTabs string `ini:"render-account-tabs"`
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SidebarWidth int `ini:"sidebar-width"`
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PreviewHeight int `ini:"preview-height"`
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EmptyMessage string `ini:"empty-message"`
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EmptyDirlist string `ini:"empty-dirlist"`
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MouseEnabled bool `ini:"mouse-enabled"`
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}
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const (
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FILTER_MIMETYPE = iota
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FILTER_HEADER
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)
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type AccountConfig struct {
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Archive string
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CopyTo string
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Default string
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From string
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Name string
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Source string
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SourceCredCmd string
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Folders []string
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Params map[string]string
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Outgoing string
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OutgoingCredCmd string
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}
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type BindingConfig struct {
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Global *KeyBindings
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AccountWizard *KeyBindings
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Compose *KeyBindings
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ComposeEditor *KeyBindings
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ComposeReview *KeyBindings
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MessageList *KeyBindings
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MessageView *KeyBindings
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Terminal *KeyBindings
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}
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type ComposeConfig struct {
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Editor string `ini:"editor"`
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}
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type FilterConfig struct {
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FilterType int
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Filter string
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Command string
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Header string
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Regex *regexp.Regexp
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}
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type ViewerConfig struct {
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Pager string
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Alternatives []string
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ShowHeaders bool `ini:"show-headers"`
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AlwaysShowMime bool `ini:"always-show-mime"`
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HeaderLayout [][]string `ini:"-"`
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}
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type TriggersConfig struct {
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NewEmail string `ini:"new-email"`
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ExecuteCommand func(command []string) error
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}
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type AercConfig struct {
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Bindings BindingConfig
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Compose ComposeConfig
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Ini *ini.File `ini:"-"`
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Accounts []AccountConfig `ini:"-"`
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Filters []FilterConfig `ini:"-"`
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Viewer ViewerConfig `ini:"-"`
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Triggers TriggersConfig `ini:"-"`
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Ui UIConfig
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General GeneralConfig
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}
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// Input: TimestampFormat
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// Output: timestamp-format
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func mapName(raw string) string {
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newstr := make([]rune, 0, len(raw))
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for i, chr := range raw {
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if isUpper := 'A' <= chr && chr <= 'Z'; isUpper {
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if i > 0 {
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newstr = append(newstr, '-')
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}
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}
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newstr = append(newstr, unicode.ToLower(chr))
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}
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return string(newstr)
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}
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func loadAccountConfig(path string) ([]AccountConfig, error) {
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file, err := ini.Load(path)
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if err != nil {
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// No config triggers account configuration wizard
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return nil, nil
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}
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file.NameMapper = mapName
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var accounts []AccountConfig
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for _, _sec := range file.SectionStrings() {
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if _sec == "DEFAULT" {
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continue
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}
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sec := file.Section(_sec)
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account := AccountConfig{
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Archive: "Archive",
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Default: "INBOX",
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Name: _sec,
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Params: make(map[string]string),
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}
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if err = sec.MapTo(&account); err != nil {
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return nil, err
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}
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for key, val := range sec.KeysHash() {
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if key == "folders" {
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folders := strings.Split(val, ",")
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sort.Strings(folders)
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account.Folders = folders
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} else if key == "source-cred-cmd" {
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account.SourceCredCmd = val
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} else if key == "outgoing" {
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account.Outgoing = val
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} else if key == "outgoing-cred-cmd" {
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account.OutgoingCredCmd = val
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} else if key == "from" {
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account.From = val
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} else if key == "copy-to" {
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account.CopyTo = val
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} else if key == "archive" {
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account.Archive = val
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} else if key != "name" {
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account.Params[key] = val
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}
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}
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if account.Source == "" {
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return nil, fmt.Errorf("Expected source for account %s", _sec)
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}
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source, err := parseCredential(account.Source, account.SourceCredCmd)
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if err != nil {
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return nil, fmt.Errorf("Invalid source credentials for %s: %s", _sec, err)
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}
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account.Source = source
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outgoing, err := parseCredential(account.Outgoing, account.OutgoingCredCmd)
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if err != nil {
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return nil, fmt.Errorf("Invalid outgoing credentials for %s: %s", _sec, err)
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}
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account.Outgoing = outgoing
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accounts = append(accounts, account)
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}
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return accounts, nil
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}
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func parseCredential(cred, command string) (string, error) {
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if cred == "" || command == "" {
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return cred, nil
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}
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u, err := url.Parse(cred)
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if err != nil {
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return "", err
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}
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// ignore the command if a password is specified
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if _, exists := u.User.Password(); exists {
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return cred, nil
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}
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// don't attempt to parse the command if the url is a path (ie /usr/bin/sendmail)
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if !u.IsAbs() {
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return cred, nil
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}
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cmd := exec.Command("sh", "-c", command)
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output, err := cmd.Output()
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if err != nil {
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return "", fmt.Errorf("failed to read password: %s", err)
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}
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pw := strings.TrimSpace(string(output))
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u.User = url.UserPassword(u.User.Username(), pw)
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return u.String(), nil
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}
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func installTemplate(root, sharedir, name string) error {
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if _, err := os.Stat(root); os.IsNotExist(err) {
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err := os.MkdirAll(root, 0755)
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if err != nil {
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return err
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}
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}
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data, err := ioutil.ReadFile(path.Join(sharedir, name))
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if err != nil {
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return err
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}
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err = ioutil.WriteFile(path.Join(root, name), data, 0644)
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if err != nil {
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return err
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}
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return nil
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}
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func (config *AercConfig) LoadConfig(file *ini.File) error {
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if filters, err := file.GetSection("filters"); err == nil {
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// TODO: Parse the filter more finely, e.g. parse the regex
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for _, match := range filters.KeyStrings() {
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cmd := filters.KeysHash()[match]
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filter := FilterConfig{
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Command: cmd,
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Filter: match,
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}
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if strings.Contains(match, ",~") {
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filter.FilterType = FILTER_HEADER
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header := filter.Filter[:strings.Index(filter.Filter, ",")]
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regex := filter.Filter[strings.Index(filter.Filter, "~")+1:]
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filter.Header = strings.ToLower(header)
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filter.Regex, err = regexp.Compile(regex)
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if err != nil {
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panic(err)
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}
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} else if strings.ContainsRune(match, ',') {
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filter.FilterType = FILTER_HEADER
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header := filter.Filter[:strings.Index(filter.Filter, ",")]
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value := filter.Filter[strings.Index(filter.Filter, ",")+1:]
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filter.Header = strings.ToLower(header)
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filter.Regex, err = regexp.Compile(regexp.QuoteMeta(value))
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} else {
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filter.FilterType = FILTER_MIMETYPE
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}
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config.Filters = append(config.Filters, filter)
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}
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}
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if viewer, err := file.GetSection("viewer"); err == nil {
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if err := viewer.MapTo(&config.Viewer); err != nil {
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return err
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}
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for key, val := range viewer.KeysHash() {
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switch key {
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case "alternatives":
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config.Viewer.Alternatives = strings.Split(val, ",")
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case "header-layout":
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config.Viewer.HeaderLayout = parseLayout(val)
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}
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}
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}
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if compose, err := file.GetSection("compose"); err == nil {
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if err := compose.MapTo(&config.Compose); err != nil {
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return err
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}
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}
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if ui, err := file.GetSection("ui"); err == nil {
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if err := ui.MapTo(&config.Ui); err != nil {
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return err
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}
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}
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if triggers, err := file.GetSection("triggers"); err == nil {
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if err := triggers.MapTo(&config.Triggers); err != nil {
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return err
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}
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}
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return nil
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}
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func LoadConfigFromFile(root *string, sharedir string) (*AercConfig, error) {
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if root == nil {
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_root := path.Join(xdg.ConfigHome(), "aerc")
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root = &_root
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}
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filename := path.Join(*root, "accounts.conf")
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if err := checkConfigPerms(filename); err != nil {
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return nil, err
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}
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filename = path.Join(*root, "aerc.conf")
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file, err := ini.Load(filename)
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if err != nil {
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if err := installTemplate(*root, sharedir, "aerc.conf"); err != nil {
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return nil, err
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}
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if file, err = ini.Load(filename); err != nil {
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return nil, err
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}
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}
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file.NameMapper = mapName
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config := &AercConfig{
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Bindings: BindingConfig{
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Global: NewKeyBindings(),
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AccountWizard: NewKeyBindings(),
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Compose: NewKeyBindings(),
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ComposeEditor: NewKeyBindings(),
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ComposeReview: NewKeyBindings(),
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MessageList: NewKeyBindings(),
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MessageView: NewKeyBindings(),
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Terminal: NewKeyBindings(),
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},
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Ini: file,
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Ui: UIConfig{
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IndexFormat: "%D %-17.17n %s",
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TimestampFormat: "2006-01-02 03:04 PM",
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ShowHeaders: []string{
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"From", "To", "Cc", "Bcc", "Subject", "Date",
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},
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RenderAccountTabs: "auto",
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SidebarWidth: 20,
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PreviewHeight: 12,
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EmptyMessage: "(no messages)",
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EmptyDirlist: "(no folders)",
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MouseEnabled: false,
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},
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Viewer: ViewerConfig{
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Pager: "less -R",
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Alternatives: []string{"text/plain", "text/html"},
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ShowHeaders: false,
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HeaderLayout: [][]string{
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{"From", "To"},
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{"Cc", "Bcc"},
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{"Date"},
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{"Subject"},
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},
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},
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}
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// These bindings are not configurable
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config.Bindings.AccountWizard.ExKey = KeyStroke{
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Key: tcell.KeyCtrlE,
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}
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quit, _ := ParseBinding("<C-q>", ":quit<Enter>")
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config.Bindings.AccountWizard.Add(quit)
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if err = config.LoadConfig(file); err != nil {
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return nil, err
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}
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if ui, err := file.GetSection("general"); err == nil {
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if err := ui.MapTo(&config.General); err != nil {
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return nil, err
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}
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}
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accountsPath := path.Join(*root, "accounts.conf")
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if accounts, err := loadAccountConfig(accountsPath); err != nil {
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return nil, err
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} else {
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config.Accounts = accounts
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}
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filename = path.Join(*root, "binds.conf")
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binds, err := ini.Load(filename)
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if err != nil {
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if err := installTemplate(*root, sharedir, "binds.conf"); err != nil {
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return nil, err
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}
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if binds, err = ini.Load(filename); err != nil {
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return nil, err
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}
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}
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groups := map[string]**KeyBindings{
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"default": &config.Bindings.Global,
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"compose": &config.Bindings.Compose,
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"messages": &config.Bindings.MessageList,
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"terminal": &config.Bindings.Terminal,
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"view": &config.Bindings.MessageView,
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"compose::editor": &config.Bindings.ComposeEditor,
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"compose::review": &config.Bindings.ComposeReview,
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}
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for _, name := range binds.SectionStrings() {
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sec, err := binds.GetSection(name)
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if err != nil {
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return nil, err
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}
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group, ok := groups[strings.ToLower(name)]
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if !ok {
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return nil, errors.New("Unknown keybinding group " + name)
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}
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bindings := NewKeyBindings()
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for key, value := range sec.KeysHash() {
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if key == "$ex" {
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strokes, err := ParseKeyStrokes(value)
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if err != nil {
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return nil, err
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}
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if len(strokes) != 1 {
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return nil, errors.New(
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"Error: only one keystroke supported for $ex")
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}
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bindings.ExKey = strokes[0]
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continue
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}
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if key == "$noinherit" {
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if value == "false" {
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continue
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}
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if value != "true" {
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return nil, errors.New(
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"Error: expected 'true' or 'false' for $noinherit")
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}
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bindings.Globals = false
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continue
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}
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binding, err := ParseBinding(key, value)
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if err != nil {
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return nil, err
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}
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bindings.Add(binding)
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}
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*group = MergeBindings(bindings, *group)
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}
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// Globals can't inherit from themselves
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config.Bindings.Global.Globals = false
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return config, nil
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}
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// checkConfigPerms checks for too open permissions
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// printing the fix on stdout and returning an error
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func checkConfigPerms(filename string) error {
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info, err := os.Stat(filename)
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if err != nil {
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return nil // disregard absent files
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}
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perms := info.Mode().Perm()
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goPerms := perms >> 3
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// group or others have read access
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if goPerms&0x44 != 0 {
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fmt.Printf("The file %v has too open permissions.\n", filename)
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fmt.Println("This is a security issue (it contains passwords).")
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fmt.Printf("To fix it, run `chmod 600 %v`\n", filename)
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return errors.New("account.conf permissions too lax")
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}
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return nil
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}
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func parseLayout(layout string) [][]string {
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rows := strings.Split(layout, ",")
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l := make([][]string, len(rows))
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for i, r := range rows {
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l[i] = strings.Split(r, "|")
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}
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return l
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}
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