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config.go
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config.go
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package peco
import (
"encoding/json"
"fmt"
"os"
"path/filepath"
"strings"
"strconv"
"github.com/nsf/termbox-go"
"github.com/peco/peco/filter"
"github.com/peco/peco/internal/util"
"github.com/pkg/errors"
)
var homedirFunc = util.Homedir
// NewConfig creates a new Config
func (c *Config) Init() error {
c.Keymap = make(map[string]string)
c.InitialMatcher = IgnoreCaseMatch
c.Style.Init()
c.Prompt = "QUERY>"
c.Layout = LayoutTypeTopDown
c.Use256Color = false
return nil
}
// ReadFilename reads the config from the given file, and
// does the appropriate processing, if any
func (c *Config) ReadFilename(filename string) error {
f, err := os.Open(filename)
if err != nil {
return errors.Wrapf(err, "failed to open file %s", filename)
}
defer f.Close()
err = json.NewDecoder(f).Decode(c)
if err != nil {
return errors.Wrap(err, "failed to decode JSON")
}
if !IsValidLayoutType(LayoutType(c.Layout)) {
return errors.Errorf("invalid layout type: %s", c.Layout)
}
if len(c.CustomMatcher) > 0 {
fmt.Fprintf(os.Stderr, "'CustomMatcher' is deprecated. Use CustomFilter instead\n")
for n, cfg := range c.CustomMatcher {
if _, ok := c.CustomFilter[n]; ok {
return errors.Errorf("failed to create CustomFilter: '%s' already exists. Refusing to overwrite with deprecated CustomMatcher config", n)
}
c.CustomFilter[n] = CustomFilterConfig{
Cmd: cfg[0],
Args: cfg[1:],
BufferThreshold: filter.DefaultCustomFilterBufferThreshold,
}
}
}
return nil
}
var (
stringToFg = map[string]termbox.Attribute{
"default": termbox.ColorDefault,
"black": termbox.ColorBlack,
"red": termbox.ColorRed,
"green": termbox.ColorGreen,
"yellow": termbox.ColorYellow,
"blue": termbox.ColorBlue,
"magenta": termbox.ColorMagenta,
"cyan": termbox.ColorCyan,
"white": termbox.ColorWhite,
}
stringToBg = map[string]termbox.Attribute{
"on_default": termbox.ColorDefault,
"on_black": termbox.ColorBlack,
"on_red": termbox.ColorRed,
"on_green": termbox.ColorGreen,
"on_yellow": termbox.ColorYellow,
"on_blue": termbox.ColorBlue,
"on_magenta": termbox.ColorMagenta,
"on_cyan": termbox.ColorCyan,
"on_white": termbox.ColorWhite,
}
stringToFgAttr = map[string]termbox.Attribute{
"bold": termbox.AttrBold,
"underline": termbox.AttrUnderline,
"reverse": termbox.AttrReverse,
}
stringToBgAttr = map[string]termbox.Attribute{
"on_bold": termbox.AttrBold,
}
)
// NewStyleSet creates a new StyleSet struct
func NewStyleSet() *StyleSet {
ss := &StyleSet{}
ss.Init()
return ss
}
func (ss *StyleSet) Init() {
ss.Basic.fg = termbox.ColorDefault
ss.Basic.bg = termbox.ColorDefault
ss.Query.fg = termbox.ColorDefault
ss.Query.bg = termbox.ColorDefault
ss.Matched.fg = termbox.ColorCyan
ss.Matched.bg = termbox.ColorDefault
ss.SavedSelection.fg = termbox.ColorBlack | termbox.AttrBold
ss.SavedSelection.bg = termbox.ColorCyan
ss.Selected.fg = termbox.ColorDefault | termbox.AttrUnderline
ss.Selected.bg = termbox.ColorMagenta
}
// UnmarshalJSON satisfies json.RawMessage.
func (s *Style) UnmarshalJSON(buf []byte) error {
raw := []string{}
if err := json.Unmarshal(buf, &raw); err != nil {
return errors.Wrapf(err, "failed to unmarshal Style")
}
return stringsToStyle(s, raw)
}
func stringsToStyle(style *Style, raw []string) error {
style.fg = termbox.ColorDefault
style.bg = termbox.ColorDefault
for _, s := range raw {
fg, ok := stringToFg[s]
if ok {
style.fg = fg
} else {
if fg, err := strconv.ParseUint(s, 10, 8); err == nil {
style.fg = termbox.Attribute(fg+1)
}
}
bg, ok := stringToBg[s]
if ok {
style.bg = bg
} else {
if strings.HasPrefix(s, "on_") {
if bg, err := strconv.ParseUint(s[3:], 10, 8); err == nil {
style.bg = termbox.Attribute(bg+1)
}
}
}
}
for _, s := range raw {
if fgAttr, ok := stringToFgAttr[s]; ok {
style.fg |= fgAttr
}
if bgAttr, ok := stringToBgAttr[s]; ok {
style.bg |= bgAttr
}
}
return nil
}
// This is a variable because we want to change its behavior
// when we run tests.
type configLocateFunc func(string) (string, error)
func locateRcfileIn(dir string) (string, error) {
const basename = "config.json"
file := filepath.Join(dir, basename)
if _, err := os.Stat(file); err != nil {
return "", errors.Wrapf(err, "failed to stat file %s", file)
}
return file, nil
}
// LocateRcfile attempts to find the config file in various locations
func LocateRcfile(locater configLocateFunc) (string, error) {
// http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
//
// Try in this order:
// $XDG_CONFIG_HOME/peco/config.json
// $XDG_CONFIG_DIR/peco/config.json (where XDG_CONFIG_DIR is listed in $XDG_CONFIG_DIRS)
// ~/.peco/config.json
home, uErr := homedirFunc()
// Try dir supplied via env var
if dir := os.Getenv("XDG_CONFIG_HOME"); dir != "" {
if file, err := locater(filepath.Join(dir, "peco")); err == nil {
return file, nil
}
} else if uErr == nil { // silently ignore failure for homedir()
// Try "default" XDG location, is user is available
if file, err := locater(filepath.Join(home, ".config", "peco")); err == nil {
return file, nil
}
}
// this standard does not take into consideration windows (duh)
// while the spec says use ":" as the separator, Go provides us
// with filepath.ListSeparator, so use it
if dirs := os.Getenv("XDG_CONFIG_DIRS"); dirs != "" {
for _, dir := range strings.Split(dirs, fmt.Sprintf("%c", filepath.ListSeparator)) {
if file, err := locater(filepath.Join(dir, "peco")); err == nil {
return file, nil
}
}
}
if uErr == nil { // silently ignore failure for homedir()
if file, err := locater(filepath.Join(home, ".peco")); err == nil {
return file, nil
}
}
return "", errors.New("config file not found")
}