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author | Laria Carolin Chabowski <laria@laria.me> | 2020-10-04 22:58:03 +0200 |
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committer | Laria Carolin Chabowski <laria@laria.me> | 2020-10-04 22:58:03 +0200 |
commit | 5b456afb49bfa6ff1567510bc1d9362377d32216 (patch) | |
tree | e9f13973251405095dd8b0a31930ca10caa57163 /conflang.go | |
parent | 1f700deeb1a26ab289178b76518a33faa3f51545 (diff) | |
download | startpage-5b456afb49bfa6ff1567510bc1d9362377d32216.tar.gz startpage-5b456afb49bfa6ff1567510bc1d9362377d32216.tar.bz2 startpage-5b456afb49bfa6ff1567510bc1d9362377d32216.zip |
New config format and new features
We're now using json as a config format instead of our weird own format.
The weather icon is now optional, simply don't define WeatherPlace in your
config.
You can now specify which subreddit to get background images from. The
default is still /r/EarthPorn.
Diffstat (limited to 'conflang.go')
-rw-r--r-- | conflang.go | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/conflang.go b/conflang.go deleted file mode 100644 index 0b4a856..0000000 --- a/conflang.go +++ /dev/null @@ -1,160 +0,0 @@ -package main - -import ( - "bufio" - "fmt" - "io" -) - -type toktype int - -const ( - tText toktype = iota - tNextCmd -) - -type token struct { - Type toktype - Data string - Line int -} - -func scan(r io.Reader, tokens chan<- token, errch chan<- error) { - emit := func(t toktype, d []byte, line int) { - if t == tText && len(d) == 0 { - return - } - tokens <- token{t, string(d), line} - } - - err := func() error { - br := bufio.NewReader(r) - - escaped := false - data := []byte{} - line := 1 - - for { - b, err := br.ReadByte() - - switch err { - case nil: - case io.EOF: - return nil - default: - return ErrorAtLine{line, err} - } - - if b == '\n' { - line++ - } - - if escaped { - data = append(data, b) - escaped = false - continue - } - - switch b { - case '\\': - escaped = true - case ' ', '\t': - emit(tText, data, line) - data = data[:0] - case '\n': - emit(tText, data, line) - data = data[:0] - emit(tNextCmd, nil, line) - default: - data = append(data, b) - } - } - - emit(tText, data, line) - emit(tNextCmd, nil, line) - return nil - }() - - close(tokens) - errch <- err -} - -type command struct { - Name string - Params []string - Line int -} - -func parse(tokens <-chan token, cmds chan<- command) { - defer close(cmds) - - startcmd := true - cmd := command{"", make([]string, 0), 0} - - for tok := range tokens { - switch tok.Type { - case tText: - if startcmd { - cmd.Name = tok.Data - cmd.Line = tok.Line - startcmd = false - } else { - cmd.Params = append(cmd.Params, tok.Data) - } - case tNextCmd: - if !startcmd { - cmds <- cmd - cmd.Name = "" - cmd.Params = make([]string, 0) - startcmd = true - } - } - } -} - -type cmdfunc func(params []string) error - -var commands = map[string]cmdfunc{ - "nop": func(_ []string) error { return nil }, -} - -func RegisterCommand(name string, f cmdfunc) { - commands[name] = f -} - -type ErrorAtLine struct { - Line int - Err error -} - -func (err ErrorAtLine) Error() string { - return fmt.Sprintf("%s (at line %d)", err.Err, err.Line) -} - -type CommandNotFound string - -func (c CommandNotFound) Error() string { - return fmt.Sprintf("Command \"%s\" not found", c) -} - -func RunCommands(r io.Reader) error { - errch := make(chan error) - tokens := make(chan token) - cmds := make(chan command) - - go scan(r, tokens, errch) - go parse(tokens, cmds) - - for cmd := range cmds { - f, ok := commands[cmd.Name] - if !ok { - return ErrorAtLine{cmd.Line, CommandNotFound(cmd.Name)} - } - - if err := f(cmd.Params); err != nil { - return ErrorAtLine{cmd.Line, err} - } - } - - return <-errch -} |