93 lines
1.9 KiB
Go
93 lines
1.9 KiB
Go
package compat
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import (
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"strconv"
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"strings"
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"github.com/evanw/esbuild/internal/ast"
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)
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type v struct {
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major uint16
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minor uint8
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patch uint8
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}
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type Semver struct {
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// "1.2.3-alpha" => { Parts: {1, 2, 3}, PreRelease: "-alpha" }
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Parts []int
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PreRelease string
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}
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func (v Semver) String() string {
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b := strings.Builder{}
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for _, part := range v.Parts {
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if b.Len() > 0 {
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b.WriteRune('.')
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}
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b.WriteString(strconv.Itoa(part))
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}
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b.WriteString(v.PreRelease)
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return b.String()
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}
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// Returns <0 if "a < b"
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// Returns 0 if "a == b"
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// Returns >0 if "a > b"
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func compareVersions(a v, b Semver) int {
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diff := int(a.major)
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if len(b.Parts) > 0 {
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diff -= b.Parts[0]
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}
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if diff == 0 {
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diff = int(a.minor)
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if len(b.Parts) > 1 {
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diff -= b.Parts[1]
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}
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}
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if diff == 0 {
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diff = int(a.patch)
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if len(b.Parts) > 2 {
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diff -= b.Parts[2]
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}
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}
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if diff == 0 && len(b.PreRelease) != 0 {
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return 1 // "1.0.0" > "1.0.0-alpha"
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}
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return diff
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}
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// The start is inclusive and the end is exclusive
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type versionRange struct {
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start v
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end v // Use 0.0.0 for "no end"
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}
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func isVersionSupported(ranges []versionRange, version Semver) bool {
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for _, r := range ranges {
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if compareVersions(r.start, version) <= 0 && (r.end == (v{}) || compareVersions(r.end, version) > 0) {
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return true
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}
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}
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return false
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}
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func SymbolFeature(kind ast.SymbolKind) JSFeature {
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switch kind {
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case ast.SymbolPrivateField:
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return ClassPrivateField
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case ast.SymbolPrivateMethod:
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return ClassPrivateMethod
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case ast.SymbolPrivateGet, ast.SymbolPrivateSet, ast.SymbolPrivateGetSetPair:
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return ClassPrivateAccessor
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case ast.SymbolPrivateStaticField:
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return ClassPrivateStaticField
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case ast.SymbolPrivateStaticMethod:
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return ClassPrivateStaticMethod
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case ast.SymbolPrivateStaticGet, ast.SymbolPrivateStaticSet, ast.SymbolPrivateStaticGetSetPair:
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return ClassPrivateStaticAccessor
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default:
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return 0
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}
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}
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