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author | Jake Champlin <jake.champlin.27@gmail.com> | 2017-06-06 12:40:07 -0400 |
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committer | Jake Champlin <jake.champlin.27@gmail.com> | 2017-06-06 12:40:07 -0400 |
commit | bae9f6d2fd5eb5bc80929bd393932b23f14d7c93 (patch) | |
tree | ca9ab12a7d78b1fc27a8f734729081357ce6d252 /vendor/github.com/hashicorp/go-version/version.go | |
parent | 254c495b6bebab3fb72a243c4bce858d79e6ee99 (diff) | |
download | terraform-provider-statuscake-bae9f6d2fd5eb5bc80929bd393932b23f14d7c93.tar.gz terraform-provider-statuscake-bae9f6d2fd5eb5bc80929bd393932b23f14d7c93.tar.zst terraform-provider-statuscake-bae9f6d2fd5eb5bc80929bd393932b23f14d7c93.zip |
Initial transfer of provider code
Diffstat (limited to 'vendor/github.com/hashicorp/go-version/version.go')
-rw-r--r-- | vendor/github.com/hashicorp/go-version/version.go | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/vendor/github.com/hashicorp/go-version/version.go b/vendor/github.com/hashicorp/go-version/version.go new file mode 100644 index 0000000..ae2f6b6 --- /dev/null +++ b/vendor/github.com/hashicorp/go-version/version.go | |||
@@ -0,0 +1,308 @@ | |||
1 | package version | ||
2 | |||
3 | import ( | ||
4 | "bytes" | ||
5 | "fmt" | ||
6 | "reflect" | ||
7 | "regexp" | ||
8 | "strconv" | ||
9 | "strings" | ||
10 | ) | ||
11 | |||
12 | // The compiled regular expression used to test the validity of a version. | ||
13 | var versionRegexp *regexp.Regexp | ||
14 | |||
15 | // The raw regular expression string used for testing the validity | ||
16 | // of a version. | ||
17 | const VersionRegexpRaw string = `v?([0-9]+(\.[0-9]+)*?)` + | ||
18 | `(-?([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` + | ||
19 | `(\+([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` + | ||
20 | `?` | ||
21 | |||
22 | // Version represents a single version. | ||
23 | type Version struct { | ||
24 | metadata string | ||
25 | pre string | ||
26 | segments []int64 | ||
27 | si int | ||
28 | } | ||
29 | |||
30 | func init() { | ||
31 | versionRegexp = regexp.MustCompile("^" + VersionRegexpRaw + "$") | ||
32 | } | ||
33 | |||
34 | // NewVersion parses the given version and returns a new | ||
35 | // Version. | ||
36 | func NewVersion(v string) (*Version, error) { | ||
37 | matches := versionRegexp.FindStringSubmatch(v) | ||
38 | if matches == nil { | ||
39 | return nil, fmt.Errorf("Malformed version: %s", v) | ||
40 | } | ||
41 | segmentsStr := strings.Split(matches[1], ".") | ||
42 | segments := make([]int64, len(segmentsStr)) | ||
43 | si := 0 | ||
44 | for i, str := range segmentsStr { | ||
45 | val, err := strconv.ParseInt(str, 10, 64) | ||
46 | if err != nil { | ||
47 | return nil, fmt.Errorf( | ||
48 | "Error parsing version: %s", err) | ||
49 | } | ||
50 | |||
51 | segments[i] = int64(val) | ||
52 | si++ | ||
53 | } | ||
54 | |||
55 | // Even though we could support more than three segments, if we | ||
56 | // got less than three, pad it with 0s. This is to cover the basic | ||
57 | // default usecase of semver, which is MAJOR.MINOR.PATCH at the minimum | ||
58 | for i := len(segments); i < 3; i++ { | ||
59 | segments = append(segments, 0) | ||
60 | } | ||
61 | |||
62 | return &Version{ | ||
63 | metadata: matches[7], | ||
64 | pre: matches[4], | ||
65 | segments: segments, | ||
66 | si: si, | ||
67 | }, nil | ||
68 | } | ||
69 | |||
70 | // Must is a helper that wraps a call to a function returning (*Version, error) | ||
71 | // and panics if error is non-nil. | ||
72 | func Must(v *Version, err error) *Version { | ||
73 | if err != nil { | ||
74 | panic(err) | ||
75 | } | ||
76 | |||
77 | return v | ||
78 | } | ||
79 | |||
80 | // Compare compares this version to another version. This | ||
81 | // returns -1, 0, or 1 if this version is smaller, equal, | ||
82 | // or larger than the other version, respectively. | ||
83 | // | ||
84 | // If you want boolean results, use the LessThan, Equal, | ||
85 | // or GreaterThan methods. | ||
86 | func (v *Version) Compare(other *Version) int { | ||
87 | // A quick, efficient equality check | ||
88 | if v.String() == other.String() { | ||
89 | return 0 | ||
90 | } | ||
91 | |||
92 | segmentsSelf := v.Segments64() | ||
93 | segmentsOther := other.Segments64() | ||
94 | |||
95 | // If the segments are the same, we must compare on prerelease info | ||
96 | if reflect.DeepEqual(segmentsSelf, segmentsOther) { | ||
97 | preSelf := v.Prerelease() | ||
98 | preOther := other.Prerelease() | ||
99 | if preSelf == "" && preOther == "" { | ||
100 | return 0 | ||
101 | } | ||
102 | if preSelf == "" { | ||
103 | return 1 | ||
104 | } | ||
105 | if preOther == "" { | ||
106 | return -1 | ||
107 | } | ||
108 | |||
109 | return comparePrereleases(preSelf, preOther) | ||
110 | } | ||
111 | |||
112 | // Get the highest specificity (hS), or if they're equal, just use segmentSelf length | ||
113 | lenSelf := len(segmentsSelf) | ||
114 | lenOther := len(segmentsOther) | ||
115 | hS := lenSelf | ||
116 | if lenSelf < lenOther { | ||
117 | hS = lenOther | ||
118 | } | ||
119 | // Compare the segments | ||
120 | // Because a constraint could have more/less specificity than the version it's | ||
121 | // checking, we need to account for a lopsided or jagged comparison | ||
122 | for i := 0; i < hS; i++ { | ||
123 | if i > lenSelf-1 { | ||
124 | // This means Self had the lower specificity | ||
125 | // Check to see if the remaining segments in Other are all zeros | ||
126 | if !allZero(segmentsOther[i:]) { | ||
127 | // if not, it means that Other has to be greater than Self | ||
128 | return -1 | ||
129 | } | ||
130 | break | ||
131 | } else if i > lenOther-1 { | ||
132 | // this means Other had the lower specificity | ||
133 | // Check to see if the remaining segments in Self are all zeros - | ||
134 | if !allZero(segmentsSelf[i:]) { | ||
135 | //if not, it means that Self has to be greater than Other | ||
136 | return 1 | ||
137 | } | ||
138 | break | ||
139 | } | ||
140 | lhs := segmentsSelf[i] | ||
141 | rhs := segmentsOther[i] | ||
142 | if lhs == rhs { | ||
143 | continue | ||
144 | } else if lhs < rhs { | ||
145 | return -1 | ||
146 | } | ||
147 | // Otherwis, rhs was > lhs, they're not equal | ||
148 | return 1 | ||
149 | } | ||
150 | |||
151 | // if we got this far, they're equal | ||
152 | return 0 | ||
153 | } | ||
154 | |||
155 | func allZero(segs []int64) bool { | ||
156 | for _, s := range segs { | ||
157 | if s != 0 { | ||
158 | return false | ||
159 | } | ||
160 | } | ||
161 | return true | ||
162 | } | ||
163 | |||
164 | func comparePart(preSelf string, preOther string) int { | ||
165 | if preSelf == preOther { | ||
166 | return 0 | ||
167 | } | ||
168 | |||
169 | // if a part is empty, we use the other to decide | ||
170 | if preSelf == "" { | ||
171 | _, notIsNumeric := strconv.ParseInt(preOther, 10, 64) | ||
172 | if notIsNumeric == nil { | ||
173 | return -1 | ||
174 | } | ||
175 | return 1 | ||
176 | } | ||
177 | |||
178 | if preOther == "" { | ||
179 | _, notIsNumeric := strconv.ParseInt(preSelf, 10, 64) | ||
180 | if notIsNumeric == nil { | ||
181 | return 1 | ||
182 | } | ||
183 | return -1 | ||
184 | } | ||
185 | |||
186 | if preSelf > preOther { | ||
187 | return 1 | ||
188 | } | ||
189 | |||
190 | return -1 | ||
191 | } | ||
192 | |||
193 | func comparePrereleases(v string, other string) int { | ||
194 | // the same pre release! | ||
195 | if v == other { | ||
196 | return 0 | ||
197 | } | ||
198 | |||
199 | // split both pre releases for analyse their parts | ||
200 | selfPreReleaseMeta := strings.Split(v, ".") | ||
201 | otherPreReleaseMeta := strings.Split(other, ".") | ||
202 | |||
203 | selfPreReleaseLen := len(selfPreReleaseMeta) | ||
204 | otherPreReleaseLen := len(otherPreReleaseMeta) | ||
205 | |||
206 | biggestLen := otherPreReleaseLen | ||
207 | if selfPreReleaseLen > otherPreReleaseLen { | ||
208 | biggestLen = selfPreReleaseLen | ||
209 | } | ||
210 | |||
211 | // loop for parts to find the first difference | ||
212 | for i := 0; i < biggestLen; i = i + 1 { | ||
213 | partSelfPre := "" | ||
214 | if i < selfPreReleaseLen { | ||
215 | partSelfPre = selfPreReleaseMeta[i] | ||
216 | } | ||
217 | |||
218 | partOtherPre := "" | ||
219 | if i < otherPreReleaseLen { | ||
220 | partOtherPre = otherPreReleaseMeta[i] | ||
221 | } | ||
222 | |||
223 | compare := comparePart(partSelfPre, partOtherPre) | ||
224 | // if parts are equals, continue the loop | ||
225 | if compare != 0 { | ||
226 | return compare | ||
227 | } | ||
228 | } | ||
229 | |||
230 | return 0 | ||
231 | } | ||
232 | |||
233 | // Equal tests if two versions are equal. | ||
234 | func (v *Version) Equal(o *Version) bool { | ||
235 | return v.Compare(o) == 0 | ||
236 | } | ||
237 | |||
238 | // GreaterThan tests if this version is greater than another version. | ||
239 | func (v *Version) GreaterThan(o *Version) bool { | ||
240 | return v.Compare(o) > 0 | ||
241 | } | ||
242 | |||
243 | // LessThan tests if this version is less than another version. | ||
244 | func (v *Version) LessThan(o *Version) bool { | ||
245 | return v.Compare(o) < 0 | ||
246 | } | ||
247 | |||
248 | // Metadata returns any metadata that was part of the version | ||
249 | // string. | ||
250 | // | ||
251 | // Metadata is anything that comes after the "+" in the version. | ||
252 | // For example, with "1.2.3+beta", the metadata is "beta". | ||
253 | func (v *Version) Metadata() string { | ||
254 | return v.metadata | ||
255 | } | ||
256 | |||
257 | // Prerelease returns any prerelease data that is part of the version, | ||
258 | // or blank if there is no prerelease data. | ||
259 | // | ||
260 | // Prerelease information is anything that comes after the "-" in the | ||
261 | // version (but before any metadata). For example, with "1.2.3-beta", | ||
262 | // the prerelease information is "beta". | ||
263 | func (v *Version) Prerelease() string { | ||
264 | return v.pre | ||
265 | } | ||
266 | |||
267 | // Segments returns the numeric segments of the version as a slice of ints. | ||
268 | // | ||
269 | // This excludes any metadata or pre-release information. For example, | ||
270 | // for a version "1.2.3-beta", segments will return a slice of | ||
271 | // 1, 2, 3. | ||
272 | func (v *Version) Segments() []int { | ||
273 | segmentSlice := make([]int, len(v.segments)) | ||
274 | for i, v := range v.segments { | ||
275 | segmentSlice[i] = int(v) | ||
276 | } | ||
277 | return segmentSlice | ||
278 | } | ||
279 | |||
280 | // Segments64 returns the numeric segments of the version as a slice of int64s. | ||
281 | // | ||
282 | // This excludes any metadata or pre-release information. For example, | ||
283 | // for a version "1.2.3-beta", segments will return a slice of | ||
284 | // 1, 2, 3. | ||
285 | func (v *Version) Segments64() []int64 { | ||
286 | return v.segments | ||
287 | } | ||
288 | |||
289 | // String returns the full version string included pre-release | ||
290 | // and metadata information. | ||
291 | func (v *Version) String() string { | ||
292 | var buf bytes.Buffer | ||
293 | fmtParts := make([]string, len(v.segments)) | ||
294 | for i, s := range v.segments { | ||
295 | // We can ignore err here since we've pre-parsed the values in segments | ||
296 | str := strconv.FormatInt(s, 10) | ||
297 | fmtParts[i] = str | ||
298 | } | ||
299 | fmt.Fprintf(&buf, strings.Join(fmtParts, ".")) | ||
300 | if v.pre != "" { | ||
301 | fmt.Fprintf(&buf, "-%s", v.pre) | ||
302 | } | ||
303 | if v.metadata != "" { | ||
304 | fmt.Fprintf(&buf, "+%s", v.metadata) | ||
305 | } | ||
306 | |||
307 | return buf.String() | ||
308 | } | ||