55 lines
2.0 KiB
Go
55 lines
2.0 KiB
Go
 
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package gradle
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import (
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"fmt"
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"os"
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"regexp"
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)
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// versionRe matches a Gradle/Kotlin DSL version assignment on its own line.
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// Group 1 captures the version string (without quotes).
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// Handles both double-quoted (Kotlin/Groovy) and single-quoted (Groovy) forms,
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// with or without spaces around =.
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var versionRe = regexp.MustCompile(`(?m)^[ \t]*version\s*=\s*["']([^"']+)["']`)
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// ReadVersion returns the version value from a build.gradle or build.gradle.kts file.
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func ReadVersion(path string) (string, error) {
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data, err := os.ReadFile(path)
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if err != nil {
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return "", fmt.Errorf("read %s: %w", path, err)
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}
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m := versionRe.FindStringSubmatch(string(data))
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if m == nil {
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return "", fmt.Errorf("no version assignment found in %s", path)
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}
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return m[1], nil
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}
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// WriteVersion replaces the version assignment in a build.gradle or build.gradle.kts
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// file in-place. oldVersion must match what ReadVersion returned. Quote style is preserved.
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func WriteVersion(path, oldVersion, newVersion string) error {
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data, err := os.ReadFile(path)
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if err != nil {
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return fmt.Errorf("read %s: %w", path, err)
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}
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updated, ok := replaceVersion(string(data), oldVersion, newVersion)
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if !ok {
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return fmt.Errorf("version %q not found in %s", oldVersion, path)
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}
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return os.WriteFile(path, []byte(updated), 0644)
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}
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// replaceVersion finds and replaces the first version assignment line in a Gradle build file.
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// Quote style (single or double) of the original line is preserved.
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// Returns the updated content and true if a replacement was made.
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func replaceVersion(content, oldVersion, newVersion string) (string, bool) {
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re := regexp.MustCompile(`(?m)^([ \t]*version\s*=\s*)(["'])` + regexp.QuoteMeta(oldVersion) + `["']`)
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m := re.FindStringSubmatchIndex(content)
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if m == nil {
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return content, false
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}
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prefix := content[m[2]:m[3]] // "version = " etc., preserving whitespace
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quote := content[m[4]:m[5]] // " or '
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return content[:m[0]] + prefix + quote + newVersion + quote + content[m[1]:], true
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}
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