config: replace YAML with scfg config format

This patch replaces the YAML configuration format with scfg
(https://git.sr.ht/~emersion/scfg).

Additionally, a few things about configuration are cleaned up:
* abbreviated names are expanded (addr -> address, nick -> nickname)
* negative bools switched to positive (no-tls -> tls)
* independent column widths are grouped under the "pane-width"
  directive
* implementation of default configuration values is improved
* password-cmd is executed directly (with scfg field parsing)
  instead of with "sh -c".
* on-highlight is now a file, $XDG_CONFIG_HOME/senpai/highlight by
  default, which can be changed with the on-highlight-path directive

9 files changed, 358 insertions, 151 deletions

diff --git a/README.md b/README.md
index 8ad8467..7dec286 100644
--- a/README.md
+++ b/README.md
@@ -14,12 +14,12 @@ senpai is an IRC client that works best with bouncers:
 
 ```shell
 mkdir -p ~/.config/senpai
-cat <<EOF >~/.config/senpai/senpai.yaml
-addr: chat.sr.ht
-nick: senpai
-password: "my password can't be this cute (2010)"
+cat <<EOF >~/.config/senpai/senpai.scfg
+address chat.sr.ht
+nickname senpai
+password "my password can't be this cute (2010)"
 # alternatively, specify a command to fetch your password:
-# password-cmd: "gopass show irc/<username>"
+# password-cmd  gopass show irc/<username>
 EOF
 go run ./cmd/senpai
 ```
diff --git a/app.go b/app.go
index d652b97..6ea9f44 100644
--- a/app.go
+++ b/app.go
@@ -2,6 +2,7 @@ package senpai
 
 import (
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"net"
 	"os"
@@ -111,10 +112,7 @@ func NewApp(cfg Config) (app *App, err error) {
 		}
 	}
 
-	mouse := true
-	if cfg.Mouse != nil {
-		mouse = *cfg.Mouse
-	}
+	mouse := cfg.Mouse
 
 	app.win, err = ui.New(ui.Config{
 		NickColWidth:   cfg.NickColWidth,
@@ -320,10 +318,10 @@ func (app *App) tryConnect() (conn net.Conn, err error) {
 	if colonIdx <= bracketIdx {
 		// either colonIdx < 0, or the last colon is before a ']' (end
 		// of IPv6 address. -> missing port
-		if app.cfg.NoTLS {
-			addr += ":6667"
-		} else {
+		if app.cfg.TLS {
 			addr += ":6697"
+		} else {
+			addr += ":6667"
 		}
 	}
 
@@ -332,7 +330,7 @@ func (app *App) tryConnect() (conn net.Conn, err error) {
 		return
 	}
 
-	if !app.cfg.NoTLS {
+	if app.cfg.TLS {
 		host, _, _ := net.SplitHostPort(addr) // should succeed since net.Dial did.
 		conn = tls.Client(conn, &tls.Config{
 			ServerName: host,
@@ -889,22 +887,38 @@ func (app *App) isHighlight(s *irc.Session, content string) bool {
 	return false
 }
 
-// notifyHighlight executes the "on-highlight" command according to the given
+// notifyHighlight executes the script at "on-highlight-path" according to the given
 // message context.
 func (app *App) notifyHighlight(buffer, nick, content string) {
-	if app.cfg.OnHighlight == "" {
-		return
+	path := app.cfg.OnHighlightPath
+	if path == "" {
+		defaultHighlightPath, err := DefaultHighlightPath()
+		if err != nil {
+			return
+		}
+		path = defaultHighlightPath
 	}
-	sh, err := exec.LookPath("sh")
-	if err != nil {
+
+	netID, curBuffer := app.win.CurrentBuffer()
+	if _, err := os.Stat(app.cfg.OnHighlightPath); errors.Is(err, os.ErrNotExist) {
+		// only error out if the user specified a highlight path
+		// if default path unreachable, simple bail
+		if app.cfg.OnHighlightPath != "" {
+			body := fmt.Sprintf("Unable to find on-highlight command at path: %q", app.cfg.OnHighlightPath)
+			app.addStatusLine(netID, ui.Line{
+				At:        time.Now(),
+				Head:      "!!",
+				HeadColor: tcell.ColorRed,
+				Body:      ui.PlainString(body),
+			})
+		}
 		return
 	}
-	netID, curBuffer := app.win.CurrentBuffer()
 	here := "0"
 	if buffer == curBuffer { // TODO also check netID
 		here = "1"
 	}
-	cmd := exec.Command(sh, "-c", app.cfg.OnHighlight)
+	cmd := exec.Command(app.cfg.OnHighlightPath)
 	cmd.Env = append(os.Environ(),
 		fmt.Sprintf("BUFFER=%s", buffer),
 		fmt.Sprintf("HERE=%s", here),
@@ -913,7 +927,7 @@ func (app *App) notifyHighlight(buffer, nick, content string) {
 	)
 	output, err := cmd.CombinedOutput()
 	if err != nil {
-		body := fmt.Sprintf("Failed to invoke on-highlight command: %v. Output: %q", err, string(output))
+		body := fmt.Sprintf("Failed to invoke on-highlight command at path: %v. Output: %q", err, string(output))
 		app.addStatusLine(netID, ui.Line{
 			At:        time.Now(),
 			Head:      "!!",
@@ -928,7 +942,7 @@ func (app *App) notifyHighlight(buffer, nick, content string) {
 func (app *App) typing() {
 	netID, buffer := app.win.CurrentBuffer()
 	s := app.sessions[netID]
-	if s == nil || app.cfg.NoTypings {
+	if s == nil || !app.cfg.Typings {
 		return
 	}
 	if buffer == "" {
diff --git a/cmd/senpai/main.go b/cmd/senpai/main.go
index 675228f..665cacc 100644
--- a/cmd/senpai/main.go
+++ b/cmd/senpai/main.go
@@ -34,7 +34,7 @@ func main() {
 		if err != nil {
 			panic(err)
 		}
-		configPath = path.Join(configDir, "senpai", "senpai.yaml")
+		configPath = path.Join(configDir, "senpai", "senpai.scfg")
 	}
 
 	cfg, err := senpai.LoadConfigFile(configPath)
diff --git a/cmd/test/main.go b/cmd/test/main.go
index 804937f..6eb0574 100644
--- a/cmd/test/main.go
+++ b/cmd/test/main.go
@@ -108,7 +108,7 @@ func parseFlags() {
 			if err != nil {
 				panic(err)
 			}
-			configPath = path.Join(configDir, "senpai", "senpai.yaml")
+			configPath = path.Join(configDir, "senpai", "senpai.scfg")
 		}
 
 		cfg, err := senpai.LoadConfigFile(configPath)
@@ -121,6 +121,6 @@ func parseFlags() {
 		if cfg.Password != nil {
 			password = *cfg.Password
 		}
-		useTLS = !cfg.NoTLS
+		useTLS = cfg.TLS
 	}
 }
diff --git a/config.go b/config.go
index 8c8181d..5a3cc2b 100644
--- a/config.go
+++ b/config.go
@@ -3,21 +3,20 @@ package senpai
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"os/exec"
+	"path"
 	"strconv"
 	"strings"
 
 	"github.com/gdamore/tcell/v2"
 
-	"gopkg.in/yaml.v2"
+	"git.sr.ht/~emersion/go-scfg"
 )
 
 type Color tcell.Color
 
-func (c *Color) UnmarshalText(data []byte) error {
-	s := string(data)
-
+func parseColor(s string, c *Color) error {
 	if strings.HasPrefix(s, "#") {
 		hex, err := strconv.ParseInt(s[1:], 16, 32)
 		if err != nil {
@@ -47,34 +46,73 @@ func (c *Color) UnmarshalText(data []byte) error {
 	return nil
 }
 
+type ConfigColors struct {
+	Prompt Color
+}
+
 type Config struct {
-	Addr        string
-	Nick        string
-	Real        string
-	User        string
-	Password    *string
-	PasswordCmd string `yaml:"password-cmd"`
-	NoTLS       bool   `yaml:"no-tls"`
-	Channels    []string
-
-	NoTypings bool `yaml:"no-typings"`
-	Mouse     *bool
-
-	Highlights     []string
-	OnHighlight    string `yaml:"on-highlight"`
-	NickColWidth   int    `yaml:"nick-column-width"`
-	ChanColWidth   int    `yaml:"chan-column-width"`
-	MemberColWidth int    `yaml:"member-column-width"`
-
-	Colors struct {
-		Prompt Color
-	}
+	Addr     string
+	Nick     string
+	Real     string
+	User     string
+	Password *string
+	TLS      bool
+	Channels []string
+
+	Typings bool
+	Mouse   bool
+
+	Highlights      []string
+	OnHighlightPath string
+	NickColWidth    int
+	ChanColWidth    int
+	MemberColWidth  int
+
+	Colors ConfigColors
 
 	Debug bool
 }
 
-func ParseConfig(buf []byte) (cfg Config, err error) {
-	err = yaml.Unmarshal(buf, &cfg)
+func DefaultHighlightPath() (string, error) {
+	configDir, err := os.UserConfigDir()
+	if err != nil {
+		return "", err
+	}
+	return path.Join(configDir, "senpai", "highlight"), nil
+}
+
+func Defaults() (cfg Config, err error) {
+	cfg = Config{
+		Addr:            "",
+		Nick:            "",
+		Real:            "",
+		User:            "",
+		Password:        nil,
+		TLS:             true,
+		Channels:        nil,
+		Typings:         true,
+		Mouse:           true,
+		Highlights:      nil,
+		OnHighlightPath: "",
+		NickColWidth:    16,
+		ChanColWidth:    0,
+		MemberColWidth:  0,
+		Colors: ConfigColors{
+			Prompt: Color(tcell.ColorDefault),
+		},
+		Debug: false,
+	}
+
+	return
+}
+
+func ParseConfig(filename string) (cfg Config, err error) {
+	cfg, err = Defaults()
+	if err != nil {
+		return
+	}
+
+	err = unmarshal(filename, &cfg)
 	if err != nil {
 		return cfg, err
 	}
@@ -90,45 +128,165 @@ func ParseConfig(buf []byte) (cfg Config, err error) {
 	if cfg.Real == "" {
 		cfg.Real = cfg.Nick
 	}
-	if cfg.PasswordCmd != "" {
-		password, err := runPasswordCmd(cfg.PasswordCmd)
-		if err != nil {
-			return cfg, err
-		}
-		cfg.Password = &password
-	}
-	if cfg.NickColWidth <= 0 {
-		cfg.NickColWidth = 16
-	}
-	if cfg.ChanColWidth < 0 {
-		cfg.ChanColWidth = 0
-	}
-	if cfg.MemberColWidth < 0 {
-		cfg.MemberColWidth = 0
-	}
 	return
 }
 
 func LoadConfigFile(filename string) (cfg Config, err error) {
-	var buf []byte
-
-	buf, err = ioutil.ReadFile(filename)
-	if err != nil {
-		return cfg, fmt.Errorf("failed to read the file: %s", err)
-	}
-
-	cfg, err = ParseConfig(buf)
+	cfg, err = ParseConfig(filename)
 	if err != nil {
 		return cfg, fmt.Errorf("invalid content found in the file: %s", err)
 	}
 	return
 }
 
-func runPasswordCmd(command string) (password string, err error) {
-	cmd := exec.Command("sh", "-c", command)
-	stdout, err := cmd.Output()
-	if err == nil {
-		password = strings.TrimSuffix(string(stdout), "\n")
+func unmarshal(filename string, cfg *Config) (err error) {
+	directives, err := scfg.Load(filename)
+	if err != nil {
+		return fmt.Errorf("error parsing scfg: %s", err)
+	}
+
+	for _, d := range directives {
+		switch d.Name {
+		case "address":
+			if err := d.ParseParams(&cfg.Addr); err != nil {
+				return err
+			}
+		case "nickname":
+			if err := d.ParseParams(&cfg.Nick); err != nil {
+				return err
+			}
+		case "username":
+			if err := d.ParseParams(&cfg.User); err != nil {
+				return err
+			}
+		case "realname":
+			if err := d.ParseParams(&cfg.Real); err != nil {
+				return err
+			}
+		case "password":
+			// if a password-cmd is provided, don't use this value
+			if directives.Get("password-cmd") != nil {
+				continue
+			}
+
+			var password string
+			if err := d.ParseParams(&password); err != nil {
+				return err
+			}
+			cfg.Password = &password
+		case "password-cmd":
+			var cmdName string
+			if err := d.ParseParams(&cmdName); err != nil {
+				return err
+			}
+
+			cmd := exec.Command(cmdName, d.Params[1:]...)
+			var stdout []byte
+			if stdout, err = cmd.Output(); err != nil {
+				return fmt.Errorf("error running password command: %s", err)
+			}
+
+			password := strings.TrimSuffix(string(stdout), "\n")
+			cfg.Password = &password
+		case "channel":
+			// TODO: does this work with soju.im/bouncer-networks extension?
+			cfg.Channels = append(cfg.Channels, d.Params...)
+		case "highlight":
+			cfg.Highlights = append(cfg.Highlights, d.Params...)
+		case "on-highlight-path":
+			if err := d.ParseParams(&cfg.OnHighlightPath); err != nil {
+				return err
+			}
+		case "pane-widths":
+			for _, child := range d.Children {
+				switch child.Name {
+				case "nicknames":
+					var nicknames string
+					if err := child.ParseParams(&nicknames); err != nil {
+						return err
+					}
+
+					if cfg.NickColWidth, err = strconv.Atoi(nicknames); err != nil {
+						return err
+					}
+				case "channels":
+					var channels string
+					if err := child.ParseParams(&channels); err != nil {
+						return err
+					}
+
+					if cfg.ChanColWidth, err = strconv.Atoi(channels); err != nil {
+						return err
+					}
+				case "members":
+					var members string
+					if err := child.ParseParams(&members); err != nil {
+						return err
+					}
+
+					if cfg.MemberColWidth, err = strconv.Atoi(members); err != nil {
+						return err
+					}
+				default:
+					return fmt.Errorf("unknown directive %q", child.Name)
+				}
+			}
+		case "tls":
+			var tls string
+			if err := d.ParseParams(&tls); err != nil {
+				return err
+			}
+
+			if cfg.TLS, err = strconv.ParseBool(tls); err != nil {
+				return err
+			}
+		case "typings":
+			var typings string
+			if err := d.ParseParams(&typings); err != nil {
+				return err
+			}
+
+			if cfg.Typings, err = strconv.ParseBool(typings); err != nil {
+				return err
+			}
+		case "mouse":
+			var mouse string
+			if err := d.ParseParams(&mouse); err != nil {
+				return err
+			}
+
+			if cfg.Mouse, err = strconv.ParseBool(mouse); err != nil {
+				return err
+			}
+		case "colors":
+			for _, child := range d.Children {
+				switch child.Name {
+				case "prompt":
+					var prompt string
+					if err := child.ParseParams(&prompt); err != nil {
+						return err
+					}
+
+					fmt.Println(prompt)
+					if err = parseColor(prompt, &cfg.Colors.Prompt); err != nil {
+						return err
+					}
+				default:
+					return fmt.Errorf("unknown directive %q", child.Name)
+				}
+			}
+		case "debug":
+			var debug string
+			if err := d.ParseParams(&debug); err != nil {
+				return err
+			}
+
+			if cfg.Debug, err = strconv.ParseBool(debug); err != nil {
+				return err
+			}
+		default:
+			return fmt.Errorf("unknown directive %q", d.Name)
+		}
 	}
 
 	return
diff --git a/doc/senpai.1.scd b/doc/senpai.1.scd
index df943aa..7517d14 100644
--- a/doc/senpai.1.scd
+++ b/doc/senpai.1.scd
@@ -31,7 +31,7 @@ extensions, such as:
 senpai needs a configuration file to start.  It searches for it in the following
 location:
 
-	$XDG_CONFIG_HOME/senpai/senpai.yaml
+	$XDG_CONFIG_HOME/senpai/senpai.scfg
 
 If unset, $XDG_CONFIG_HOME defaults to *~/.config*.
 
diff --git a/doc/senpai.5.scd b/doc/senpai.5.scd
index 4121297..1d49e51 100644
--- a/doc/senpai.5.scd
+++ b/doc/senpai.5.scd
@@ -6,34 +6,35 @@ senpai - Configuration file format and settings
 
 # DESCRIPTION
 
-A senpai configuration file is a YAML file.
+A senpai configuration file is a scfg file (see https://git.sr.ht/~emersion/scfg).
+The config file has one directive per line.
 
 Some settings are required, the others are optional.
 
 # SETTINGS
 
-*addr* (required)
+*address* (required)
 	The address (_host[:port]_) of the IRC server. senpai uses TLS connections
 	by default unless you specify *no-tls* option. TLS connections default to
 	port 6697, plain-text use port 6667.
 
-*nick* (required)
+*nickname* (required)
 	Your nickname, sent with a _NICK_ IRC message. It mustn't contain spaces or
 	colons (*:*).
 
-*real*
+*realname*
 	Your real name, or actually just a field that will be available to others
 	and may contain spaces and colons.  Sent with the _USER_ IRC message.  By
 	default, the value of *nick* is used.
 
-*user*
+*username*
 	Your username, sent with the _USER_ IRC message and also used for SASL
 	authentication.  By default, the value of *nick* is used.
 
 *password*
 	Your password, used for SASL authentication. See also *password-cmd*.
 
-*password-cmd*
+*password-cmd* command [arguments...]
 	Alternatively to providing your SASL authentication password directly in
 	plaintext, you can specify a command to be run to fetch the password at
 	runtime. This is useful if you store your passwords in a separate (probably
@@ -41,18 +42,31 @@ Some settings are required, the others are optional.
 	_pass_ or _gopass_. If a *password-cmd* is provided, the value of *password*
 	will be ignored and the output of *password-cmd* will be used for login.
 
-*channels*
-	A list of channel names that senpai will automatically join at startup and
-	server reconnect.
+*channel*
+	A spaced separated list of channel names that senpai will automatically join 
+	at startup and server reconnect. This directive can be specified multiple times.
 
-*highlights*
-	A list of keywords that will trigger a notification and a display indicator
-	when said by others.  By default, senpai will use your current nickname.
+*highlight*
+	A space separated list of keywords that will trigger a notification and a 
+	display indicator when said by others. This directive can be specified
+	multiple times.
 
-*on-highlight*
-	A command to be executed via _sh_ when you are highlighted.  The following
-	environment variables are set with repect to the highlight, THEY MUST APPEAR
-	QUOTED IN THE SETTING, OR YOU WILL BE OPEN TO SHELL INJECTION ATTACKS.
+	By default, senpai will use your current nickname.
+
+*on-highlight-path*
+	Alternative path to a shell script to be executed when you are highlighted. By default,
+	senpai looks for a highlight shell script at $XDG_CONFIG_HOME/senpai/highlight.
+	If no file is found at that path, and an alternate path is not provided,
+	highlight command execution is disabled.
+
+	If unset, $XDG_CONFIG_HOME defaults to *~/.config/*.
+
+	Before the highlight script is executed, the following environment
+	variables are populated:
+	
+	Shell scripts MUST ENSURE VARIABLES appear QUOTED in the script file,
+	OR YOU WILL BE OPEN TO SHELL INJECTION ATTACKS. Shell scripts must also 
+	ensure characters like '\*' and '?' are not expanded.
 
 [[ *Environment variable*
 :< *Description*
@@ -72,65 +86,80 @@ Some settings are required, the others are optional.
 	To get around this, you can double the backslash with the following snippet:
 
 ```
-on-highlight: |
-    escape() {
-        printf "%s" "$1" | sed 's#\\#\\\\#g'
-    }
-    notify-send "[$BUFFER] $SENDER" "$(escape "$MESSAGE")"
+#!/bin/sh
+escape() {
+	printf "%s" "$1" | sed 's#\\#\\\\#g'
+}
+
+notify-send "[$BUFFER] $SENDER" "$(escape "$MESSAGE")"
 ```
 
-*nick-column-width*
-	The number of cells that the column for nicknames occupies in the timeline.
-	By default, 16.
+*pane-widths* { ... }
+	Configure the width of various UI panes. 
 
-*chan-column-width*
-	Make the channel list vertical, with a width equals to the given amount of
-	cells.  By default, the channel list is horizontal.
+	Pane widths are set as sub-directives of the main *pane-widths* directive:
+
+```
+pane-widths {
+    nicknames 16
+}
+```
 
-*member-column-width*
-	Show the list of channel members on the right of the screen, with a width
-	equals to the given amount of cells.
+	This directive supports the following sub-directives:
 
-*no-tls*
-	Disable TLS encryption.  Defaults to false.
+	*nicknames*
+		The number of cells that the column for nicknames occupies in the timeline.
+		By default, 16.
 
-*no-typings*
-	Prevent senpai from sending typing notifications which let others know when
-	you are typing a message.  Defaults to false.
+	*channels*
+		Make the channel list vertical, with a width equals to the given amount of
+		cells.  By default, the channel list is horizontal.
+
+	*members*
+		Show the list of channel members on the right of the screen, with a width
+		equals to the given amount of cells.
+
+*tls*
+	Enable TLS encryption.  Defaults to true.
+
+*typings*
+	Send typing notifications which let others know when you are typing a message.
+	Defaults to true.
 
 *mouse*
 	Enable or disable mouse support.  Defaults to true.
 
-*colors*
+*colors* { ... }
 	Settings for colors of different UI elements.
 
 	Colors are represented as numbers from 0 to 255 for 256 default terminal
 	colors respectively. -1 has special meaning of default terminal color. To
 	use true colors, *#*_rrggbb_ notation is supported.
 
-	Colors are set as sub-options of the main *colors* option:
+	Colors are set as sub-directives of the main *colors* directive:
 
 ```
-colors:
-    prompt: 3 # green
+colors {
+    prompt 3 # green
+}
 ```
 
-[[ *Sub-option*
+[[ *Sub-directive*
 :< *Description*
 |  prompt
 :  color for ">"-prompt that appears in command mode
 
 *debug*
 	Dump all sent and received data to the home buffer, useful for debugging.
-	By default, false.
+	Defaults to false.
 
 # EXAMPLES
 
 A minimal configuration file to connect to Libera.Chat as "Guest123456":
 
 ```
-addr: irc.libera.chat
-nick: Guest123456
+address irc.libera.chat
+nickname Guest123456
 ```
 
 A more advanced configuration file that enables SASL authentication, fetches the
@@ -140,24 +169,30 @@ notifications on highlight and decreases the width of the nick column to 12
 need to know if the terminal emulator that runs senpai has focus):
 
 ```
-addr: irc.libera.chat
-nick: Guest123456
-user: senpai
-real: Guest von Lenon
-password-cmd: "gopass show irc/guest" # use your favorite CLI password solution here
-channels: ["#rahxephon"]
-highlights:
-	- guest
-	- senpai
-on-highlight: |
-    escape() {
-        printf "%s" "$1" | sed 's#\\#\\\\#g'
-    }
-    FOCUS=$(swaymsg -t get_tree | jq '..|objects|select(.focused==true)|.name' | grep senpai | wc -l)
-    if [ "$HERE" -eq 0 ] || [ $FOCUS -eq 0 ]; then
-        notify-send "[$BUFFER] $SENDER" "$(escape "$MESSAGE")"
-    fi
-nick-column-width: 12
+address irc.libera.chat
+nickname Guest123456
+username senpai
+realname "Guest von Lenon"
+password-cmd gopass show irc/guest # use your favorite CLI password solution here
+channel "#rahxephon"
+highlight guest senpai
+highlight lenon # don't know why you'd split it into multiple lines, but you can if you want
+pane-widths {
+	nicknames 12
+}
+```
+
+And the highlight file (*~/.config/senpai/highlight*):
+```
+#!/bin/sh
+
+escape() {
+	printf "%s" "$1" | sed 's#\\#\\\\#g'
+}
+FOCUS=$(swaymsg -t get_tree | jq '..|objects|select(.focused==true)|.name' | grep senpai | wc -l)
+if [ "$HERE" -eq 0 ] || [ $FOCUS -eq 0 ]; then
+	notify-send "[$BUFFER] $SENDER" "$(escape "$MESSAGE")"
+fi
 ```
 
 # SEE ALSO
diff --git a/go.mod b/go.mod
index 88829bd..d3c9b55 100644
--- a/go.mod
+++ b/go.mod
@@ -3,11 +3,11 @@ module git.sr.ht/~taiite/senpai
 go 1.16
 
 require (
+	git.sr.ht/~emersion/go-scfg v0.0.0-20201019143924-142a8aa629fc
 	github.com/gdamore/tcell/v2 v2.3.11
 	github.com/mattn/go-runewidth v0.0.10
 	golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf
 	golang.org/x/time v0.0.0-20210611083556-38a9dc6acbc6
-	gopkg.in/yaml.v2 v2.3.0
 	mvdan.cc/xurls/v2 v2.3.0
 )
 
diff --git a/go.sum b/go.sum
index 634a5bd..856f865 100644
--- a/go.sum
+++ b/go.sum
@@ -1,11 +1,15 @@
+git.sr.ht/~emersion/go-scfg v0.0.0-20201019143924-142a8aa629fc h1:51BD67xFX+bozd3ZRuOUfalrhx4/nQSh6A9lI08rYOk=
+git.sr.ht/~emersion/go-scfg v0.0.0-20201019143924-142a8aa629fc/go.mod h1:t+Ww6SR24yYnXzEWiNlOY0AFo5E9B73X++10lrSpp4U=
+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/gdamore/encoding v1.0.0 h1:+7OoQ1Bc6eTm5niUzBa0Ctsh6JbMW6Ra+YNuAtDBdko=
 github.com/gdamore/encoding v1.0.0/go.mod h1:alR0ol34c49FCSBLjhosxzcPHQbf2trDkoo5dl+VrEg=
+github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
+github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
 github.com/hhirtz/tcell/v2 v2.3.12-0.20210807133752-5d743c3ab0c9 h1:YE0ZsDHfDGR0MeB6YLSGW8tjoxOXZKX3XbB0ytGDX4M=
 github.com/hhirtz/tcell/v2 v2.3.12-0.20210807133752-5d743c3ab0c9/go.mod h1:cTTuF84Dlj/RqmaCIV5p4w8uG1zWdk0SF6oBpwHp4fU=
-github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tWFlaaUAac=
 github.com/lucasb-eyer/go-colorful v1.0.3/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
@@ -23,11 +27,7 @@ golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/time v0.0.0-20210611083556-38a9dc6acbc6 h1:Vv0JUPWTyeqUq42B2WJ1FeIDjjvGKoA2Ss+Ts0lAVbs=
 golang.org/x/time v0.0.0-20210611083556-38a9dc6acbc6/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
-gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
-gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 mvdan.cc/xurls/v2 v2.3.0 h1:59Olnbt67UKpxF1EwVBopJvkSUBmgtb468E4GVWIZ1I=
 mvdan.cc/xurls/v2 v2.3.0/go.mod h1:AjuTy7gEiUArFMjgBBDU4SMxlfUYsRokpJQgNWOt3e4=