yay/pkg/query/version_diff.go

package query

import (
	"strings"
	"unicode"

	"github.com/Jguer/yay/v12/pkg/text"

	"github.com/Jguer/go-alpm/v2"
)

func GetVersionDiff(oldVersion, newVersion string) (left, right string) {
	if oldVersion == newVersion {
		return oldVersion + text.Red(""), newVersion + text.Green("")
	}

	diffPosition := 0

	checkWords := func(str string, index int, words ...string) bool {
		// Make sure the word is not part of a longer word
		ongoingWord := unicode.IsLetter(rune(str[index]))
		if ongoingWord {
			return false
		}

		for _, word := range words {
			wordLength := len(word)

			nextIndex := index + 1
			if (index < len(str)-wordLength) &&
				(str[nextIndex:(nextIndex+wordLength)] == word) {
				return true
			}
		}

		return false
	}

	for index, char := range oldVersion {
		charIsSpecial := !(unicode.IsLetter(char) || unicode.IsNumber(char))

		if (index >= len(newVersion)) || (char != rune(newVersion[index])) {
			if charIsSpecial {
				diffPosition = index
			}

			break
		}

		if charIsSpecial ||
			(((index == len(oldVersion)-1) || (index == len(newVersion)-1)) &&
				((len(oldVersion) != len(newVersion)) ||
					(oldVersion[index] == newVersion[index]))) ||
			checkWords(oldVersion, index, "rc", "pre", "alpha", "beta") {
			diffPosition = index + 1
		}
	}

	samePart := oldVersion[0:diffPosition]

	left = samePart + text.Red(oldVersion[diffPosition:])
	right = samePart + text.Green(newVersion[diffPosition:])

	return left, right
}

func isDevelName(name string) bool {
	for _, suffix := range []string{"git", "svn", "hg", "bzr", "nightly", "insiders-bin"} {
		if strings.HasSuffix(name, "-"+suffix) {
			return true
		}
	}

	return strings.Contains(name, "-always-")
}

func isDevelPackage(pkg alpm.IPackage) bool {
	return isDevelName(pkg.Name()) || isDevelName(pkg.Base())
}