mirror of
https://github.com/woodpecker-ci/woodpecker.git
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128 lines
2.9 KiB
Go
128 lines
2.9 KiB
Go
// Copyright (c) 2020 Denis Tingajkin
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at:
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package goheader
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import (
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"errors"
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"fmt"
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"regexp"
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"strings"
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)
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type Calculable interface {
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Calculate(map[string]Value) error
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Get() string
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}
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type Value interface {
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Calculable
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Read(*Reader) Issue
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}
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func calculateValue(calculable Calculable, values map[string]Value) (string, error) {
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sb := strings.Builder{}
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r := calculable.Get()
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var endIndex int
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var startIndex int
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for startIndex = strings.Index(r, "{{"); startIndex >= 0; startIndex = strings.Index(r, "{{") {
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_, _ = sb.WriteString(r[:startIndex])
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endIndex = strings.Index(r, "}}")
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if endIndex < 0 {
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return "", errors.New("missed value ending")
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}
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subVal := strings.ToLower(strings.TrimSpace(r[startIndex+2 : endIndex]))
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if val := values[subVal]; val != nil {
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if err := val.Calculate(values); err != nil {
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return "", err
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}
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sb.WriteString(val.Get())
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} else {
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return "", fmt.Errorf("unknown value name %v", subVal)
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}
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endIndex += 2
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r = r[endIndex:]
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}
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_, _ = sb.WriteString(r)
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return sb.String(), nil
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}
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type ConstValue struct {
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RawValue string
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}
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func (c *ConstValue) Calculate(values map[string]Value) error {
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v, err := calculateValue(c, values)
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if err != nil {
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return err
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}
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c.RawValue = v
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return nil
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}
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func (c *ConstValue) Get() string {
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return c.RawValue
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}
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func (c *ConstValue) Read(s *Reader) Issue {
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l := s.Location()
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p := s.Position()
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for _, ch := range c.Get() {
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if ch != s.Peek() {
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s.SetPosition(p)
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f := s.ReadWhile(func(r rune) bool {
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return r != '\n'
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})
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return NewIssueWithLocation(fmt.Sprintf("Expected:%v, Actual: %v", c.Get(), f), l)
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}
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s.Next()
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}
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return nil
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}
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type RegexpValue struct {
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RawValue string
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}
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func (r *RegexpValue) Calculate(values map[string]Value) error {
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v, err := calculateValue(r, values)
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if err != nil {
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return err
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}
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r.RawValue = v
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return nil
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}
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func (r *RegexpValue) Get() string {
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return r.RawValue
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}
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func (r *RegexpValue) Read(s *Reader) Issue {
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l := s.Location()
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p := regexp.MustCompile(r.Get())
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pos := s.Position()
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str := s.Finish()
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s.SetPosition(pos)
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indexes := p.FindAllIndex([]byte(str), -1)
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if len(indexes) == 0 {
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return NewIssueWithLocation(fmt.Sprintf("Pattern %v doesn't match.", p.String()), l)
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}
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s.SetPosition(pos + indexes[0][1])
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return nil
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}
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var _ Value = &ConstValue{}
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var _ Value = &RegexpValue{}
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