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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
package autorest
import (
"fmt"
"io"
"io/ioutil"
"log"
"regexp"
"strings"
)
// ReadBatchTags reads from a io.Reader of readme.go.md, parses the `multiapi` section and produces a slice of tags
func ReadBatchTags(reader io.Reader) ([]string, error) {
b, err := ioutil.ReadAll(reader)
if err != nil {
return nil, err
}
lines := strings.Split(string(b), "\n")
start := -1
end := -1
for i, line := range lines {
if multiAPISectionBeginRegex.MatchString(line) {
if start >= 0 {
return nil, fmt.Errorf("multiple multiapi section found on line %d and %d, we should only have one", start+1, i+1)
}
start = i
}
if start >= 0 && end < 0 && multiAPISectionEndRegex.MatchString(line) {
end = i
}
}
if start < 0 {
return nil, fmt.Errorf("cannot find multiapi section")
}
if end < 0 {
return nil, fmt.Errorf("multiapi section does not properly end")
}
// get the content of the mutliapi section
multiAPISection := lines[start+1 : end]
// the multiapi section should at least have two lines
if len(multiAPISection) < 2 {
return nil, fmt.Errorf("multiapi section cannot be parsed")
}
// verify the first line of the section should be "batch:"
if !batchRegex.MatchString(multiAPISection[0]) {
return nil, fmt.Errorf("multiapi section should begin with `batch:`")
}
// iterate over the rest lines, should one for one tag
var tags []string
for _, line := range multiAPISection[1:] {
matches := tagRegex.FindStringSubmatch(line)
if len(matches) < 2 {
log.Printf("[WARNING] line in batch '%s' does not starts with 'tags', ignore", line)
continue
}
tags = append(tags, matches[1])
}
return tags, nil
}
var (
multiAPISectionBeginRegex = regexp.MustCompile("^```\\s*yaml\\s*\\$\\(go\\)\\s*&&\\s*\\$\\(multiapi\\)")
multiAPISectionEndRegex = regexp.MustCompile("^\\s*```\\s*$")
batchRegex = regexp.MustCompile(`^\s*batch:\s*$`)
tagRegex = regexp.MustCompile(`^\s*-\s+tag: (\S+)\s*$`)
)
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