🎯 ExtractVersionFromOutput

Extracts the first version number of the form X.Y.Z (optionally with a pre-release suffix) from any text output.

When to use

Use it when you have a non-standard command output or log and need to grab a version number but are unsure of the format. It uses a lenient regex match, suitable for outputs from composer, php, custom tools, and so on.

Signature

func ExtractVersionFromOutput(output string) (string, bool)

Parameters

Parameter	Type	Description
output	string	Any command output text

Return value

• string: the extracted version number (for example 2.6.6 or 2.6.6-RC1); empty string when not found.
• bool: whether a version number was successfully found.

Example

package main

import (
	"fmt"

	"github.com/scagogogo/composer-skills/pkg/composer"
)

func main() {
	outputs := []string{
		"Composer version 2.6.6 2024-02-22",
		"PHP 8.2.1 (cli) (built: Jan  4 2024)",
		"some random text without version",
	}

	for _, out := range outputs {
		if ver, ok := composer.ExtractVersionFromOutput(out); ok {
			fmt.Printf("Extracted version: %s\n", ver)
		} else {
			fmt.Println("Version number not found")
		}
	}
}

Advanced

• 🔍 The regex used is (\d+\.\d+\.\d+(?:-[a-zA-Z0-9.]+)?), matching major.minor.patch with an optional - followed by a pre-release identifier (such as 1.2.3-beta.1). It returns the first match.
• ⚠️ Because the regex is lenient, it may mismatch numbers in dates (for example, 2024-02-22 will not match because it does not conform to the three-segment dot-separated X.Y.Z form), but it is reliable for well-formed version output.
• 🔗 For structured Composer version information (including major/minor/patch integers and release date), use ParseVersionOutput.
• 📦 To extract a list of package names from output, use ExtractPackageNamesFromOutput.