65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
 
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package maven
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import (
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"fmt"
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"os"
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"regexp"
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"strings"
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)
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var parentBlockRe = regexp.MustCompile(`(?s)<parent>.*?</parent>`)
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var versionTagRe = regexp.MustCompile(`<version>([^<]+)</version>`)
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// ReadVersion returns the project version from a pom.xml file.
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// It ignores the <parent> block version and dependency versions.
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func ReadVersion(pomPath string) (string, error) {
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data, err := os.ReadFile(pomPath)
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if err != nil {
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return "", fmt.Errorf("read %s: %w", pomPath, err)
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}
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// Strip <parent>…</parent> before searching so we don't pick up the parent version.
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stripped := parentBlockRe.ReplaceAllString(string(data), "")
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m := versionTagRe.FindStringSubmatch(stripped)
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if m == nil {
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return "", fmt.Errorf("no <version> element found in %s", pomPath)
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}
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return strings.TrimSpace(m[1]), nil
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}
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// WriteVersion replaces the project version in a pom.xml file in-place.
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// oldVersion must match what ReadVersion returned. The <parent> version is never touched.
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func WriteVersion(pomPath, oldVersion, newVersion string) error {
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data, err := os.ReadFile(pomPath)
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if err != nil {
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return fmt.Errorf("read %s: %w", pomPath, err)
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}
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updated := replaceProjectVersion(string(data), oldVersion, newVersion)
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if updated == string(data) {
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return fmt.Errorf("version %q not found in %s", oldVersion, pomPath)
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}
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return os.WriteFile(pomPath, []byte(updated), 0644)
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}
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// replaceProjectVersion replaces the first <version>oldVersion</version> that is not
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// inside a <parent> block. This preserves the parent version and dependency versions.
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func replaceProjectVersion(content, oldVersion, newVersion string) string {
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target := "<version>" + oldVersion + "</version>"
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replacement := "<version>" + newVersion + "</version>"
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// If there is a <parent> block, start searching after it.
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if idx := strings.Index(content, "</parent>"); idx >= 0 {
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after := content[idx:]
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if pos := strings.Index(after, target); pos >= 0 {
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abs := idx + pos
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return content[:abs] + replacement + content[abs+len(target):]
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}
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return content
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}
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return strings.Replace(content, target, replacement, 1)
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}
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