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Updating doc.go to pass linting
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Signed-off-by: Matt Farina <matt@mattfarina.com>
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mattfarina committed Aug 9, 2022
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178 changes: 89 additions & 89 deletions doc.go
Expand Up @@ -3,12 +3,12 @@ Package semver provides the ability to work with Semantic Versions (http://semve
Specifically it provides the ability to:
* Parse semantic versions
* Sort semantic versions
* Check if a semantic version fits within a set of constraints
* Optionally work with a `v` prefix
- Parse semantic versions
- Sort semantic versions
- Check if a semantic version fits within a set of constraints
- Optionally work with a `v` prefix
Parsing Semantic Versions
# Parsing Semantic Versions
There are two functions that can parse semantic versions. The `StrictNewVersion`
function only parses valid version 2 semantic versions as outlined in the
Expand All @@ -21,48 +21,48 @@ that can be sorted, compared, and used in constraints.
When parsing a version an optional error can be returned if there is an issue
parsing the version. For example,
v, err := semver.NewVersion("1.2.3-beta.1+b345")
v, err := semver.NewVersion("1.2.3-beta.1+b345")
The version object has methods to get the parts of the version, compare it to
other versions, convert the version back into a string, and get the original
string. For more details please see the documentation
at https://godoc.org/github.com/Masterminds/semver.
Sorting Semantic Versions
# Sorting Semantic Versions
A set of versions can be sorted using the `sort` package from the standard library.
For example,
raw := []string{"1.2.3", "1.0", "1.3", "2", "0.4.2",}
vs := make([]*semver.Version, len(raw))
for i, r := range raw {
v, err := semver.NewVersion(r)
if err != nil {
t.Errorf("Error parsing version: %s", err)
}
raw := []string{"1.2.3", "1.0", "1.3", "2", "0.4.2",}
vs := make([]*semver.Version, len(raw))
for i, r := range raw {
v, err := semver.NewVersion(r)
if err != nil {
t.Errorf("Error parsing version: %s", err)
}
vs[i] = v
}
vs[i] = v
}
sort.Sort(semver.Collection(vs))
sort.Sort(semver.Collection(vs))
Checking Version Constraints and Comparing Versions
# Checking Version Constraints and Comparing Versions
There are two methods for comparing versions. One uses comparison methods on
`Version` instances and the other is using Constraints. There are some important
differences to notes between these two methods of comparison.
1. When two versions are compared using functions such as `Compare`, `LessThan`,
and others it will follow the specification and always include prereleases
within the comparison. It will provide an answer valid with the comparison
spec section at https://semver.org/#spec-item-11
2. When constraint checking is used for checks or validation it will follow a
different set of rules that are common for ranges with tools like npm/js
and Rust/Cargo. This includes considering prereleases to be invalid if the
ranges does not include on. If you want to have it include pre-releases a
simple solution is to include `-0` in your range.
3. Constraint ranges can have some complex rules including the shorthard use of
~ and ^. For more details on those see the options below.
1. When two versions are compared using functions such as `Compare`, `LessThan`,
and others it will follow the specification and always include prereleases
within the comparison. It will provide an answer valid with the comparison
spec section at https://semver.org/#spec-item-11
2. When constraint checking is used for checks or validation it will follow a
different set of rules that are common for ranges with tools like npm/js
and Rust/Cargo. This includes considering prereleases to be invalid if the
ranges does not include on. If you want to have it include pre-releases a
simple solution is to include `-0` in your range.
3. Constraint ranges can have some complex rules including the shorthard use of
~ and ^. For more details on those see the options below.
There are differences between the two methods or checking versions because the
comparison methods on `Version` follow the specification while comparison ranges
Expand All @@ -76,19 +76,19 @@ patters with their versions.
Checking a version against version constraints is one of the most featureful
parts of the package.
c, err := semver.NewConstraint(">= 1.2.3")
if err != nil {
// Handle constraint not being parsable.
}
c, err := semver.NewConstraint(">= 1.2.3")
if err != nil {
// Handle constraint not being parsable.
}
v, err := semver.NewVersion("1.3")
if err != nil {
// Handle version not being parsable.
}
// Check if the version meets the constraints. The a variable will be true.
a := c.Check(v)
v, err := semver.NewVersion("1.3")
if err != nil {
// Handle version not being parsable.
}
// Check if the version meets the constraints. The a variable will be true.
a := c.Check(v)
Basic Comparisons
# Basic Comparisons
There are two elements to the comparisons. First, a comparison string is a list
of comma or space separated AND comparisons. These are then separated by || (OR)
Expand All @@ -99,43 +99,43 @@ greater than or equal to 4.2.3. This can also be written as
The basic comparisons are:
* `=`: equal (aliased to no operator)
* `!=`: not equal
* `>`: greater than
* `<`: less than
* `>=`: greater than or equal to
* `<=`: less than or equal to
- `=`: equal (aliased to no operator)
- `!=`: not equal
- `>`: greater than
- `<`: less than
- `>=`: greater than or equal to
- `<=`: less than or equal to
Hyphen Range Comparisons
# Hyphen Range Comparisons
There are multiple methods to handle ranges and the first is hyphens ranges.
These look like:
* `1.2 - 1.4.5` which is equivalent to `>= 1.2, <= 1.4.5`
* `2.3.4 - 4.5` which is equivalent to `>= 2.3.4 <= 4.5`
- `1.2 - 1.4.5` which is equivalent to `>= 1.2, <= 1.4.5`
- `2.3.4 - 4.5` which is equivalent to `>= 2.3.4 <= 4.5`
Wildcards In Comparisons
# Wildcards In Comparisons
The `x`, `X`, and `*` characters can be used as a wildcard character. This works
for all comparison operators. When used on the `=` operator it falls
back to the tilde operation. For example,
* `1.2.x` is equivalent to `>= 1.2.0 < 1.3.0`
* `>= 1.2.x` is equivalent to `>= 1.2.0`
* `<= 2.x` is equivalent to `<= 3`
* `*` is equivalent to `>= 0.0.0`
- `1.2.x` is equivalent to `>= 1.2.0 < 1.3.0`
- `>= 1.2.x` is equivalent to `>= 1.2.0`
- `<= 2.x` is equivalent to `<= 3`
- `*` is equivalent to `>= 0.0.0`
Tilde Range Comparisons (Patch)
The tilde (`~`) comparison operator is for patch level ranges when a minor
version is specified and major level changes when the minor number is missing.
For example,
* `~1.2.3` is equivalent to `>= 1.2.3 < 1.3.0`
* `~1` is equivalent to `>= 1, < 2`
* `~2.3` is equivalent to `>= 2.3 < 2.4`
* `~1.2.x` is equivalent to `>= 1.2.0 < 1.3.0`
* `~1.x` is equivalent to `>= 1 < 2`
- `~1.2.3` is equivalent to `>= 1.2.3 < 1.3.0`
- `~1` is equivalent to `>= 1, < 2`
- `~2.3` is equivalent to `>= 2.3 < 2.4`
- `~1.2.x` is equivalent to `>= 1.2.0 < 1.3.0`
- `~1.x` is equivalent to `>= 1 < 2`
Caret Range Comparisons (Major)
Expand All @@ -144,41 +144,41 @@ The caret (`^`) comparison operator is for major level changes once a stable
as the API stability level. This is useful when comparisons of API versions as a
major change is API breaking. For example,
* `^1.2.3` is equivalent to `>= 1.2.3, < 2.0.0`
* `^1.2.x` is equivalent to `>= 1.2.0, < 2.0.0`
* `^2.3` is equivalent to `>= 2.3, < 3`
* `^2.x` is equivalent to `>= 2.0.0, < 3`
* `^0.2.3` is equivalent to `>=0.2.3 <0.3.0`
* `^0.2` is equivalent to `>=0.2.0 <0.3.0`
* `^0.0.3` is equivalent to `>=0.0.3 <0.0.4`
* `^0.0` is equivalent to `>=0.0.0 <0.1.0`
* `^0` is equivalent to `>=0.0.0 <1.0.0`
- `^1.2.3` is equivalent to `>= 1.2.3, < 2.0.0`
- `^1.2.x` is equivalent to `>= 1.2.0, < 2.0.0`
- `^2.3` is equivalent to `>= 2.3, < 3`
- `^2.x` is equivalent to `>= 2.0.0, < 3`
- `^0.2.3` is equivalent to `>=0.2.3 <0.3.0`
- `^0.2` is equivalent to `>=0.2.0 <0.3.0`
- `^0.0.3` is equivalent to `>=0.0.3 <0.0.4`
- `^0.0` is equivalent to `>=0.0.0 <0.1.0`
- `^0` is equivalent to `>=0.0.0 <1.0.0`
Validation
# Validation
In addition to testing a version against a constraint, a version can be validated
against a constraint. When validation fails a slice of errors containing why a
version didn't meet the constraint is returned. For example,
c, err := semver.NewConstraint("<= 1.2.3, >= 1.4")
if err != nil {
// Handle constraint not being parseable.
}
v, _ := semver.NewVersion("1.3")
if err != nil {
// Handle version not being parseable.
}
// Validate a version against a constraint.
a, msgs := c.Validate(v)
// a is false
for _, m := range msgs {
fmt.Println(m)
// Loops over the errors which would read
// "1.3 is greater than 1.2.3"
// "1.3 is less than 1.4"
}
c, err := semver.NewConstraint("<= 1.2.3, >= 1.4")
if err != nil {
// Handle constraint not being parseable.
}
v, _ := semver.NewVersion("1.3")
if err != nil {
// Handle version not being parseable.
}
// Validate a version against a constraint.
a, msgs := c.Validate(v)
// a is false
for _, m := range msgs {
fmt.Println(m)
// Loops over the errors which would read
// "1.3 is greater than 1.2.3"
// "1.3 is less than 1.4"
}
*/
package semver

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