package config import ( "errors" "fmt" "io/ioutil" "log" "net/url" "os" "os/exec" "path" "regexp" "sort" "strconv" "strings" "time" "unicode" "github.com/gdamore/tcell/v2" "github.com/go-ini/ini" "github.com/imdario/mergo" "github.com/kyoh86/xdg" "github.com/mitchellh/go-homedir" "git.sr.ht/~rjarry/aerc/lib/templates" ) type GeneralConfig struct { DefaultSavePath string `ini:"default-save-path"` } type UIConfig struct { IndexFormat string `ini:"index-format"` TimestampFormat string `ini:"timestamp-format"` ThisDayTimeFormat string `ini:"this-day-time-format"` ThisWeekTimeFormat string `ini:"this-week-time-format"` ThisYearTimeFormat string `ini:"this-year-time-format"` ShowHeaders []string `delim:","` RenderAccountTabs string `ini:"render-account-tabs"` PinnedTabMarker string `ini:"pinned-tab-marker"` SidebarWidth int `ini:"sidebar-width"` PreviewHeight int `ini:"preview-height"` EmptyMessage string `ini:"empty-message"` EmptyDirlist string `ini:"empty-dirlist"` MouseEnabled bool `ini:"mouse-enabled"` ThreadingEnabled bool `ini:"threading-enabled"` FuzzyComplete bool `ini:"fuzzy-complete"` NewMessageBell bool `ini:"new-message-bell"` Spinner string `ini:"spinner"` SpinnerDelimiter string `ini:"spinner-delimiter"` DirListFormat string `ini:"dirlist-format"` DirListDelay time.Duration `ini:"dirlist-delay"` DirListTree bool `ini:"dirlist-tree"` Sort []string `delim:" "` NextMessageOnDelete bool `ini:"next-message-on-delete"` CompletionDelay time.Duration `ini:"completion-delay"` CompletionPopovers bool `ini:"completion-popovers"` StyleSetDirs []string `ini:"stylesets-dirs" delim:":"` StyleSetName string `ini:"styleset-name"` style StyleSet // customize border appearance BorderCharVertical rune `ini:"-"` BorderCharHorizontal rune `ini:"-"` } type ContextType int const ( UI_CONTEXT_FOLDER ContextType = iota UI_CONTEXT_ACCOUNT UI_CONTEXT_SUBJECT BIND_CONTEXT_ACCOUNT ) type UIConfigContext struct { ContextType ContextType Regex *regexp.Regexp UiConfig UIConfig } const ( FILTER_MIMETYPE = iota FILTER_HEADER ) type AccountConfig struct { Archive string CopyTo string Default string Postpone string From string Aliases string Name string Source string SourceCredCmd string Folders []string FoldersExclude []string Params map[string]string Outgoing string OutgoingCredCmd string SignatureFile string SignatureCmd string EnableFoldersSort bool `ini:"enable-folders-sort"` FoldersSort []string `ini:"folders-sort" delim:","` } type BindingConfig struct { Global *KeyBindings AccountWizard *KeyBindings Compose *KeyBindings ComposeEditor *KeyBindings ComposeReview *KeyBindings MessageList *KeyBindings MessageView *KeyBindings MessageViewPassthrough *KeyBindings Terminal *KeyBindings } type BindingConfigContext struct { ContextType ContextType Regex *regexp.Regexp Bindings *KeyBindings BindContext string } type ComposeConfig struct { Editor string `ini:"editor"` HeaderLayout [][]string `ini:"-"` AddressBookCmd string `ini:"address-book-cmd"` ReplyToSelf bool `ini:"reply-to-self"` } type FilterConfig struct { FilterType int Filter string Command string Header string Regex *regexp.Regexp } type ViewerConfig struct { Pager string Alternatives []string ShowHeaders bool `ini:"show-headers"` AlwaysShowMime bool `ini:"always-show-mime"` HeaderLayout [][]string `ini:"-"` KeyPassthrough bool `ini:"-"` } type StatuslineConfig struct { RenderFormat string `ini:"render-format"` Separator string DisplayMode string `ini:"display-mode"` } type TriggersConfig struct { NewEmail string `ini:"new-email"` ExecuteCommand func(command []string) error } type TemplateConfig struct { TemplateDirs []string `ini:"template-dirs" delim:":"` NewMessage string `ini:"new-message"` QuotedReply string `ini:"quoted-reply"` Forwards string `ini:"forwards"` } type AercConfig struct { Bindings BindingConfig ContextualBinds []BindingConfigContext Compose ComposeConfig Ini *ini.File `ini:"-"` Accounts []AccountConfig `ini:"-"` Filters []FilterConfig `ini:"-"` Viewer ViewerConfig `ini:"-"` Statusline StatuslineConfig `ini:"-"` Triggers TriggersConfig `ini:"-"` Ui UIConfig ContextualUis []UIConfigContext General GeneralConfig Templates TemplateConfig } // Input: TimestampFormat // Output: timestamp-format func mapName(raw string) string { newstr := make([]rune, 0, len(raw)) for i, chr := range raw { if isUpper := 'A' <= chr && chr <= 'Z'; isUpper { if i > 0 { newstr = append(newstr, '-') } } newstr = append(newstr, unicode.ToLower(chr)) } return string(newstr) } func loadAccountConfig(path string) ([]AccountConfig, error) { file, err := ini.Load(path) if err != nil { // No config triggers account configuration wizard return nil, nil } file.NameMapper = mapName var accounts []AccountConfig for _, _sec := range file.SectionStrings() { if _sec == "DEFAULT" { continue } sec := file.Section(_sec) account := AccountConfig{ Archive: "Archive", Default: "INBOX", Postpone: "Drafts", Name: _sec, Params: make(map[string]string), EnableFoldersSort: true, } if err = sec.MapTo(&account); err != nil { return nil, err } for key, val := range sec.KeysHash() { if key == "folders" { folders := strings.Split(val, ",") sort.Strings(folders) account.Folders = folders } else if key == "folders-exclude" { folders := strings.Split(val, ",") sort.Strings(folders) account.FoldersExclude = folders } else if key == "source-cred-cmd" { account.SourceCredCmd = val } else if key == "outgoing" { account.Outgoing = val } else if key == "outgoing-cred-cmd" { account.OutgoingCredCmd = val } else if key == "from" { account.From = val } else if key == "aliases" { account.Aliases = val } else if key == "copy-to" { account.CopyTo = val } else if key == "archive" { account.Archive = val } else if key == "enable-folders-sort" { account.EnableFoldersSort, _ = strconv.ParseBool(val) } else if key != "name" { account.Params[key] = val } } if account.Source == "" { return nil, fmt.Errorf("Expected source for account %s", _sec) } if account.From == "" { return nil, fmt.Errorf("Expected from for account %s", _sec) } source, err := parseCredential(account.Source, account.SourceCredCmd) if err != nil { return nil, fmt.Errorf("Invalid source credentials for %s: %s", _sec, err) } account.Source = source outgoing, err := parseCredential(account.Outgoing, account.OutgoingCredCmd) if err != nil { return nil, fmt.Errorf("Invalid outgoing credentials for %s: %s", _sec, err) } account.Outgoing = outgoing accounts = append(accounts, account) } return accounts, nil } func parseCredential(cred, command string) (string, error) { if cred == "" || command == "" { return cred, nil } u, err := url.Parse(cred) if err != nil { return "", err } // ignore the command if a password is specified if _, exists := u.User.Password(); exists { return cred, nil } // don't attempt to parse the command if the url is a path (ie /usr/bin/sendmail) if !u.IsAbs() { return cred, nil } cmd := exec.Command("sh", "-c", command) cmd.Stdin = os.Stdin output, err := cmd.Output() if err != nil { return "", fmt.Errorf("failed to read password: %s", err) } pw := strings.TrimSpace(string(output)) u.User = url.UserPassword(u.User.Username(), pw) return u.String(), nil } // Set at build time var shareDir string func buildDefaultDirs() []string { var defaultDirs []string prefixes := []string{ xdg.ConfigHome(), xdg.DataHome(), } // Add XDG_CONFIG_HOME and XDG_DATA_HOME for _, v := range prefixes { if v != "" { v, err := homedir.Expand(v) if err != nil { log.Println(err) } defaultDirs = append(defaultDirs, path.Join(v, "aerc")) } } // Add custom buildtime shareDir if shareDir != "" && shareDir != "/usr/local/share/aerc" { shareDir, err := homedir.Expand(shareDir) if err == nil { defaultDirs = append(defaultDirs, shareDir) } } // Add fixed fallback locations defaultDirs = append(defaultDirs, "/usr/local/share/aerc") defaultDirs = append(defaultDirs, "/usr/share/aerc") return defaultDirs } var searchDirs = buildDefaultDirs() func installTemplate(root, name string) error { var err error if _, err = os.Stat(root); os.IsNotExist(err) { err = os.MkdirAll(root, 0755) if err != nil { return err } } var data []byte for _, dir := range searchDirs { data, err = ioutil.ReadFile(path.Join(dir, name)) if err == nil { break } } if err != nil { return err } err = ioutil.WriteFile(path.Join(root, name), data, 0644) if err != nil { return err } return nil } func (config *AercConfig) LoadConfig(file *ini.File) error { if filters, err := file.GetSection("filters"); err == nil { // TODO: Parse the filter more finely, e.g. parse the regex for _, match := range filters.KeyStrings() { cmd := filters.KeysHash()[match] filter := FilterConfig{ Command: cmd, Filter: match, } if strings.Contains(match, ",~") { filter.FilterType = FILTER_HEADER header := filter.Filter[:strings.Index(filter.Filter, ",")] regex := filter.Filter[strings.Index(filter.Filter, "~")+1:] filter.Header = strings.ToLower(header) filter.Regex, err = regexp.Compile(regex) if err != nil { return err } } else if strings.ContainsRune(match, ',') { filter.FilterType = FILTER_HEADER header := filter.Filter[:strings.Index(filter.Filter, ",")] value := filter.Filter[strings.Index(filter.Filter, ",")+1:] filter.Header = strings.ToLower(header) filter.Regex, err = regexp.Compile(regexp.QuoteMeta(value)) if err != nil { return err } } else { filter.FilterType = FILTER_MIMETYPE } config.Filters = append(config.Filters, filter) } } if viewer, err := file.GetSection("viewer"); err == nil { if err := viewer.MapTo(&config.Viewer); err != nil { return err } for key, val := range viewer.KeysHash() { switch key { case "alternatives": config.Viewer.Alternatives = strings.Split(val, ",") case "header-layout": config.Viewer.HeaderLayout = parseLayout(val) } } } if statusline, err := file.GetSection("statusline"); err == nil { if err := statusline.MapTo(&config.Statusline); err != nil { return err } } if compose, err := file.GetSection("compose"); err == nil { if err := compose.MapTo(&config.Compose); err != nil { return err } for key, val := range compose.KeysHash() { switch key { case "header-layout": config.Compose.HeaderLayout = parseLayout(val) } } } if ui, err := file.GetSection("ui"); err == nil { if err := ui.MapTo(&config.Ui); err != nil { return err } if err := validateBorderChars(ui, &config.Ui); err != nil { return err } } for _, sectionName := range file.SectionStrings() { if !strings.Contains(sectionName, "ui:") { continue } uiSection, err := file.GetSection(sectionName) if err != nil { return err } uiSubConfig := UIConfig{} if err := uiSection.MapTo(&uiSubConfig); err != nil { return err } if err := validateBorderChars(uiSection, &uiSubConfig); err != nil { return err } contextualUi := UIConfigContext{ UiConfig: uiSubConfig, } var index int if strings.Contains(sectionName, "~") { index = strings.Index(sectionName, "~") regex := string(sectionName[index+1:]) contextualUi.Regex, err = regexp.Compile(regex) if err != nil { return err } } else if strings.Contains(sectionName, "=") { index = strings.Index(sectionName, "=") value := string(sectionName[index+1:]) contextualUi.Regex, err = regexp.Compile(regexp.QuoteMeta(value)) if err != nil { return err } } else { return fmt.Errorf("Invalid Ui Context regex in %s", sectionName) } switch sectionName[3:index] { case "account": contextualUi.ContextType = UI_CONTEXT_ACCOUNT case "folder": contextualUi.ContextType = UI_CONTEXT_FOLDER case "subject": contextualUi.ContextType = UI_CONTEXT_SUBJECT default: return fmt.Errorf("Unknown Contextual Ui Section: %s", sectionName) } config.ContextualUis = append(config.ContextualUis, contextualUi) } if triggers, err := file.GetSection("triggers"); err == nil { if err := triggers.MapTo(&config.Triggers); err != nil { return err } } if templatesSec, err := file.GetSection("templates"); err == nil { if err := templatesSec.MapTo(&config.Templates); err != nil { return err } templateDirs := templatesSec.Key("template-dirs").String() if templateDirs != "" { config.Templates.TemplateDirs = strings.Split(templateDirs, ":") } } // append default paths to template-dirs and styleset-dirs for _, dir := range searchDirs { config.Ui.StyleSetDirs = append( config.Ui.StyleSetDirs, path.Join(dir, "stylesets"), ) config.Templates.TemplateDirs = append( config.Templates.TemplateDirs, path.Join(dir, "templates"), ) } // we want to fail during startup if the templates are not ok // hence we do dummy executes here t := config.Templates if err := templates.CheckTemplate(t.NewMessage, t.TemplateDirs); err != nil { return err } if err := templates.CheckTemplate(t.QuotedReply, t.TemplateDirs); err != nil { return err } if err := templates.CheckTemplate(t.Forwards, t.TemplateDirs); err != nil { return err } if err := config.Ui.loadStyleSet( config.Ui.StyleSetDirs); err != nil { return err } for idx, contextualUi := range config.ContextualUis { if contextualUi.UiConfig.StyleSetName == "" && len(contextualUi.UiConfig.StyleSetDirs) == 0 { continue // no need to do anything if nothing is overridden } // fill in the missing part from the base if contextualUi.UiConfig.StyleSetName == "" { config.ContextualUis[idx].UiConfig.StyleSetName = config.Ui.StyleSetName } else if len(contextualUi.UiConfig.StyleSetDirs) == 0 { config.ContextualUis[idx].UiConfig.StyleSetDirs = config.Ui.StyleSetDirs } // since at least one of them has changed, load the styleset if err := config.ContextualUis[idx].UiConfig.loadStyleSet( config.ContextualUis[idx].UiConfig.StyleSetDirs); err != nil { return err } } return nil } func validateBorderChars(section *ini.Section, config *UIConfig) error { for key, val := range section.KeysHash() { switch key { case "border-char-vertical": char := []rune(val) if len(char) != 1 { return fmt.Errorf("%v must be one and only one character", key) } config.BorderCharVertical = char[0] case "border-char-horizontal": char := []rune(val) if len(char) != 1 { return fmt.Errorf("%v must be one and only one character", key) } config.BorderCharHorizontal = char[0] } } return nil } func LoadConfigFromFile(root *string, logger *log.Logger) (*AercConfig, error) { if root == nil { _root := path.Join(xdg.ConfigHome(), "aerc") root = &_root } filename := path.Join(*root, "accounts.conf") if err := checkConfigPerms(filename); err != nil { return nil, err } filename = path.Join(*root, "aerc.conf") // if it doesn't exist copy over the template, then load if _, err := os.Stat(filename); errors.Is(err, os.ErrNotExist) { if err := installTemplate(*root, "aerc.conf"); err != nil { return nil, err } } file, err := ini.LoadSources(ini.LoadOptions{ KeyValueDelimiters: "=", }, filename) if err != nil { return nil, err } file.NameMapper = mapName config := &AercConfig{ Bindings: BindingConfig{ Global: NewKeyBindings(), AccountWizard: NewKeyBindings(), Compose: NewKeyBindings(), ComposeEditor: NewKeyBindings(), ComposeReview: NewKeyBindings(), MessageList: NewKeyBindings(), MessageView: NewKeyBindings(), MessageViewPassthrough: NewKeyBindings(), Terminal: NewKeyBindings(), }, ContextualBinds: []BindingConfigContext{}, Ini: file, Ui: UIConfig{ IndexFormat: "%D %-17.17n %s", TimestampFormat: "2006-01-02 03:04 PM", ThisDayTimeFormat: "", ThisWeekTimeFormat: "", ThisYearTimeFormat: "", ShowHeaders: []string{ "From", "To", "Cc", "Bcc", "Subject", "Date", }, RenderAccountTabs: "auto", PinnedTabMarker: "`", SidebarWidth: 20, PreviewHeight: 12, EmptyMessage: "(no messages)", EmptyDirlist: "(no folders)", MouseEnabled: false, NewMessageBell: true, FuzzyComplete: false, Spinner: "[..] , [..] , [..] , [..] , [..], [..] , [..] , [..] ", SpinnerDelimiter: ",", DirListFormat: "%n %>r", DirListDelay: 200 * time.Millisecond, NextMessageOnDelete: true, CompletionDelay: 250 * time.Millisecond, CompletionPopovers: true, StyleSetDirs: []string{}, StyleSetName: "default", // border defaults BorderCharVertical: ' ', BorderCharHorizontal: ' ', }, ContextualUis: []UIConfigContext{}, Viewer: ViewerConfig{ Pager: "less -R", Alternatives: []string{"text/plain", "text/html"}, ShowHeaders: false, HeaderLayout: [][]string{ {"From", "To"}, {"Cc", "Bcc"}, {"Date"}, {"Subject"}, }, }, Statusline: StatuslineConfig{ RenderFormat: "[%a] %S %>%T", Separator: " | ", DisplayMode: "", }, Compose: ComposeConfig{ HeaderLayout: [][]string{ {"To", "From"}, {"Subject"}, }, ReplyToSelf: true, }, Templates: TemplateConfig{ TemplateDirs: []string{}, NewMessage: "new_message", QuotedReply: "quoted_reply", Forwards: "forward_as_body", }, } // These bindings are not configurable config.Bindings.AccountWizard.ExKey = KeyStroke{ Key: tcell.KeyCtrlE, } quit, _ := ParseBinding("", ":quit") config.Bindings.AccountWizard.Add(quit) if err = config.LoadConfig(file); err != nil { return nil, err } if ui, err := file.GetSection("general"); err == nil { if err := ui.MapTo(&config.General); err != nil { return nil, err } } accountsPath := path.Join(*root, "accounts.conf") if accounts, err := loadAccountConfig(accountsPath); err != nil { return nil, err } else { config.Accounts = accounts } filename = path.Join(*root, "binds.conf") binds, err := ini.Load(filename) if err != nil { if err := installTemplate(*root, "binds.conf"); err != nil { return nil, err } if binds, err = ini.Load(filename); err != nil { return nil, err } } baseGroups := map[string]**KeyBindings{ "default": &config.Bindings.Global, "compose": &config.Bindings.Compose, "messages": &config.Bindings.MessageList, "terminal": &config.Bindings.Terminal, "view": &config.Bindings.MessageView, "view::passthrough": &config.Bindings.MessageViewPassthrough, "compose::editor": &config.Bindings.ComposeEditor, "compose::review": &config.Bindings.ComposeReview, } // Base Bindings for _, sectionName := range binds.SectionStrings() { // Handle :: delimeter baseSectionName := strings.Replace(sectionName, "::", "////", -1) sections := strings.Split(baseSectionName, ":") baseOnly := len(sections) == 1 baseSectionName = strings.Replace(sections[0], "////", "::", -1) group, ok := baseGroups[strings.ToLower(baseSectionName)] if !ok { return nil, errors.New("Unknown keybinding group " + sectionName) } if baseOnly { err = config.LoadBinds(binds, baseSectionName, group, logger) if err != nil { return nil, err } } } config.Bindings.Global.Globals = false for _, contextBind := range config.ContextualBinds { if contextBind.BindContext == "default" { contextBind.Bindings.Globals = false } } return config, nil } func LoadBindingSection(sec *ini.Section) (*KeyBindings, error) { bindings := NewKeyBindings() for key, value := range sec.KeysHash() { if key == "$ex" { strokes, err := ParseKeyStrokes(value) if err != nil { return nil, err } if len(strokes) != 1 { return nil, errors.New("Invalid binding") } bindings.ExKey = strokes[0] continue } if key == "$noinherit" { if value == "false" { continue } if value != "true" { return nil, errors.New("Invalid binding") } bindings.Globals = false continue } binding, err := ParseBinding(key, value) if err != nil { return nil, err } bindings.Add(binding) } return bindings, nil } func (config *AercConfig) LoadBinds(binds *ini.File, baseName string, baseGroup **KeyBindings, logger *log.Logger) error { if sec, err := binds.GetSection(baseName); err == nil { binds, err := LoadBindingSection(sec) if err != nil { return err } *baseGroup = MergeBindings(binds, *baseGroup) } for _, sectionName := range binds.SectionStrings() { if !strings.Contains(sectionName, baseName+":") || strings.Contains(sectionName, baseName+"::") { continue } bindSection, err := binds.GetSection(sectionName) if err != nil { return err } binds, err := LoadBindingSection(bindSection) if err != nil { return err } contextualBind := BindingConfigContext{ Bindings: binds, BindContext: baseName, } var index int if strings.Contains(sectionName, "=") { index = strings.Index(sectionName, "=") value := string(sectionName[index+1:]) contextualBind.Regex, err = regexp.Compile(value) if err != nil { return err } } else { return fmt.Errorf("Invalid Bind Context regex in %s", sectionName) } switch sectionName[len(baseName)+1 : index] { case "account": acctName := sectionName[index+1:] valid := false for _, acctConf := range config.Accounts { matches := contextualBind.Regex.FindString(acctConf.Name) if matches != "" { valid = true } } if !valid { logger.Printf("Tried to define binds for unexistent account: %v\n", acctName) continue } contextualBind.ContextType = BIND_CONTEXT_ACCOUNT default: return fmt.Errorf("Unknown Context Bind Section: %s", sectionName) } config.ContextualBinds = append(config.ContextualBinds, contextualBind) } return nil } // checkConfigPerms checks for too open permissions // printing the fix on stdout and returning an error func checkConfigPerms(filename string) error { info, err := os.Stat(filename) if errors.Is(err, os.ErrNotExist) { return nil // disregard absent files } if err != nil { return err } perms := info.Mode().Perm() // group or others have read access if perms&044 != 0 { fmt.Fprintf(os.Stderr, "The file %v has too open permissions.\n", filename) fmt.Fprintln(os.Stderr, "This is a security issue (it contains passwords).") fmt.Fprintf(os.Stderr, "To fix it, run `chmod 600 %v`\n", filename) return errors.New("account.conf permissions too lax") } return nil } func parseLayout(layout string) [][]string { rows := strings.Split(layout, ",") l := make([][]string, len(rows)) for i, r := range rows { l[i] = strings.Split(r, "|") } return l } func (ui *UIConfig) loadStyleSet(styleSetDirs []string) error { ui.style = NewStyleSet() err := ui.style.LoadStyleSet(ui.StyleSetName, styleSetDirs) if err != nil { return fmt.Errorf("Unable to load default styleset: %s", err) } return nil } func (config AercConfig) mergeContextualUi(baseUi UIConfig, contextType ContextType, s string) UIConfig { for _, contextualUi := range config.ContextualUis { if contextualUi.ContextType != contextType { continue } if !contextualUi.Regex.Match([]byte(s)) { continue } mergo.Merge(&baseUi, contextualUi.UiConfig, mergo.WithOverride) if contextualUi.UiConfig.StyleSetName != "" { baseUi.style = contextualUi.UiConfig.style } return baseUi } return baseUi } func (config AercConfig) GetUiConfig(params map[ContextType]string) UIConfig { baseUi := config.Ui for k, v := range params { baseUi = config.mergeContextualUi(baseUi, k, v) } return baseUi } func (uiConfig UIConfig) GetStyle(so StyleObject) tcell.Style { return uiConfig.style.Get(so) } func (uiConfig UIConfig) GetStyleSelected(so StyleObject) tcell.Style { return uiConfig.style.Selected(so) } func (uiConfig UIConfig) GetComposedStyle(base StyleObject, styles []StyleObject) tcell.Style { return uiConfig.style.Compose(base, styles) } func (uiConfig UIConfig) GetComposedStyleSelected(base StyleObject, styles []StyleObject) tcell.Style { return uiConfig.style.ComposeSelected(base, styles) }