146 lines
4.1 KiB
Go
146 lines
4.1 KiB
Go
/*
|
|
* LURE Updater - Automated updater bot for LURE packages
|
|
* Copyright (C) 2023 Elara Musayelyan
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package builtins
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"go.elara.ws/pcre"
|
|
"go.starlark.net/starlark"
|
|
"go.starlark.net/starlarkstruct"
|
|
)
|
|
|
|
var (
|
|
cacheMtx = &sync.Mutex{}
|
|
regexCache = map[string]*pcre.Regexp{}
|
|
)
|
|
|
|
var regexModule = &starlarkstruct.Module{
|
|
Name: "regex",
|
|
Members: starlark.StringDict{
|
|
"compile": starlark.NewBuiltin("regex.compile", regexCompile),
|
|
"compile_glob": starlark.NewBuiltin("regex.compile_glob", regexCompileGlob),
|
|
},
|
|
}
|
|
|
|
func regexCompile(thread *starlark.Thread, b *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
|
|
var regexStr string
|
|
err := starlark.UnpackArgs("regex.compile", args, kwargs, "regex", ®exStr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
cacheMtx.Lock()
|
|
regex, ok := regexCache[regexStr]
|
|
if !ok {
|
|
regex, err = pcre.Compile(regexStr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
regexCache[regexStr] = regex
|
|
}
|
|
cacheMtx.Unlock()
|
|
|
|
return starlarkRegex(regex), nil
|
|
}
|
|
|
|
func regexCompileGlob(thread *starlark.Thread, b *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
|
|
var globStr string
|
|
err := starlark.UnpackArgs("regex.compile_glob", args, kwargs, "glob", &globStr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
cacheMtx.Lock()
|
|
regex, ok := regexCache[globStr]
|
|
if !ok {
|
|
regex, err = pcre.CompileGlob(globStr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
regexCache[globStr] = regex
|
|
}
|
|
cacheMtx.Unlock()
|
|
|
|
return starlarkRegex(regex), nil
|
|
}
|
|
|
|
func starlarkRegex(regex *pcre.Regexp) *starlarkstruct.Struct {
|
|
return starlarkstruct.FromStringDict(starlarkstruct.Default, starlark.StringDict{
|
|
"find_all": findAll(regex),
|
|
"find_one": findOne(regex),
|
|
"matches": matches(regex),
|
|
})
|
|
}
|
|
|
|
func findAll(regex *pcre.Regexp) *starlark.Builtin {
|
|
return starlark.NewBuiltin("regex.regexp.find_all", func(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
|
|
var in string
|
|
err := starlark.UnpackArgs("regex.compile", args, kwargs, "in", &in)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
matches := regex.FindAllStringSubmatch(in, -1)
|
|
return matchesToStarlark2D(matches), nil
|
|
})
|
|
}
|
|
|
|
func findOne(regex *pcre.Regexp) *starlark.Builtin {
|
|
return starlark.NewBuiltin("regex.regexp.find_one", func(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
|
|
var in string
|
|
err := starlark.UnpackArgs("regex.compile", args, kwargs, "in", &in)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
match := regex.FindStringSubmatch(in)
|
|
return matchesToStarlark1D(match), nil
|
|
})
|
|
}
|
|
|
|
func matches(regex *pcre.Regexp) *starlark.Builtin {
|
|
return starlark.NewBuiltin("regex.regexp.find_one", func(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
|
|
var in string
|
|
err := starlark.UnpackArgs("regex.compile", args, kwargs, "in", &in)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
found := regex.MatchString(in)
|
|
return starlark.Bool(found), nil
|
|
})
|
|
}
|
|
|
|
func matchesToStarlark2D(matches [][]string) *starlark.List {
|
|
outer := make([]starlark.Value, len(matches))
|
|
for i, match := range matches {
|
|
outer[i] = matchesToStarlark1D(match)
|
|
}
|
|
return starlark.NewList(outer)
|
|
}
|
|
|
|
func matchesToStarlark1D(match []string) *starlark.List {
|
|
list := make([]starlark.Value, len(match))
|
|
for j, val := range match {
|
|
list[j] = starlark.String(val)
|
|
}
|
|
return starlark.NewList(list)
|
|
}
|