-
-
Notifications
You must be signed in to change notification settings - Fork 62
/
main.go
131 lines (113 loc) · 3.34 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
package version
import (
"fmt"
"regexp"
"strings"
"github.com/sirupsen/logrus"
)
// Filter defines parameters to apply different kind of version matching based on a list of versions
type Filter struct {
Kind string
Pattern string
}
// FoundVersions defines a version from a filter that holds both the original found version and the parsed version (depending on the kind of filter: semantic, text, etc.)
// Keeping the original found versions is useful when checking for metadata around the version, such as the changelog
type Version struct {
ParsedVersion string
OriginalVersion string
}
const (
// REGEXVERSIONKIND represents versions as a simple string
REGEXVERSIONKIND string = "regex"
// SEMVERVERSIONKIND represents versions as a semantic versioning type
SEMVERVERSIONKIND string = "semver"
// LATESTVERSIONKIND specifies that we are looking for the latest version of an array
LATESTVERSIONKIND string = "latest"
)
var (
// SupportedKind holds a list of supported version kind
SupportedKind []string = []string{
REGEXVERSIONKIND,
SEMVERVERSIONKIND,
LATESTVERSIONKIND,
}
)
// Init returns a new (copy) valid instanciated filter
func (f Filter) Init() (Filter, error) {
// Set default kind value to "latest"
if len(f.Kind) == 0 {
f.Kind = LATESTVERSIONKIND
}
// Set default pattern value based on kind
if f.Kind == LATESTVERSIONKIND && len(f.Pattern) == 0 {
f.Pattern = LATESTVERSIONKIND
} else if f.Kind == SEMVERVERSIONKIND && len(f.Pattern) == 0 {
f.Pattern = "*"
} else if f.Kind == REGEXVERSIONKIND && len(f.Pattern) == 0 {
f.Pattern = ".*"
}
return f, f.Validate()
}
// Validate tests if our filter contains valid parameters
func (f Filter) Validate() error {
ok := false
for id := range SupportedKind {
if SupportedKind[id] == f.Kind {
ok = true
break
}
}
if !ok {
return fmt.Errorf("Unsupported version kind %q", f.Kind)
}
return nil
}
// Search returns a value matching pattern
func (f *Filter) Search(versions []string) (Version, error) {
logrus.Infof("Searching for version matching pattern %q", f.Pattern)
foundVersion := Version{}
switch f.Kind {
case LATESTVERSIONKIND:
if f.Pattern == LATESTVERSIONKIND {
foundVersion.ParsedVersion = versions[len(versions)-1]
foundVersion.OriginalVersion = foundVersion.ParsedVersion
return foundVersion, nil
}
// Search for simple text matching
for i := len(versions) - 1; i >= 0; i-- {
if strings.Compare(f.Pattern, versions[i]) == 0 {
foundVersion.ParsedVersion = versions[i]
foundVersion.OriginalVersion = versions[i]
return foundVersion, nil
}
}
case REGEXVERSIONKIND:
re, err := regexp.Compile(f.Pattern)
if err != nil {
return foundVersion, err
}
// Parse version in by date publishing
// Oldest version appears first in array
for i := len(versions) - 1; i >= 0; i-- {
v := versions[i]
if re.MatchString(v) {
foundVersion.ParsedVersion = v
foundVersion.OriginalVersion = v
return foundVersion, nil
}
}
case SEMVERVERSIONKIND:
s := Semver{
Constraint: f.Pattern,
}
err := s.Search(versions)
if err != nil {
logrus.Error(err)
return foundVersion, err
}
return s.FoundVersion, nil
default:
return foundVersion, fmt.Errorf("Unsupported version kind %q with pattern %q", f.Kind, f.Pattern)
}
return foundVersion, fmt.Errorf("No version found matching pattern %q", f.Pattern)
}