Feat: Remove Requirement for Dotfile (#84)

This MR removes the requirement for a dotfile (the dotfile is now optional and will override the configuration provided via environment variables). The requirement for providing a project ID is also eliminated, by parsing the namespace and project name from the SSH or HTTPS remote, and then using that to query Gitlab for a matching project.

cmd/git.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"fmt"
+	"os/exec"
+	"regexp"
+	"strings"
+)
+
+/*
+Extracts information about the current repository and returns
+it to the client for initialization. The current directory must be a valid
+Gitlab project and the branch must be a feature branch
+*/
+func ExtractGitInfo() (string, string, string, string, error) {
+
+	url, err := getProjectUrl()
+	if err != nil {
+		return "", "", "", "", fmt.Errorf("Could not get project Url: %v", err)
+	}
+
+	re := regexp.MustCompile(`(?:[:\/])([^\/]+)\/([^\/]+)\.git$`)
+	matches := re.FindStringSubmatch(url)
+	if len(matches) != 3 {
+		return "", "", "", "", fmt.Errorf("Invalid Git URL format: %s", url)
+	}
+
+	namespace := matches[1]
+	projectName := matches[2]
+
+	branch, err := getCurrentBranch()
+	if err != nil {
+		return "", "", "", "", fmt.Errorf("Failed to get current branch: %v", err)
+	}
+
+	return url, namespace, projectName, branch, nil
+}
+
+/* Gets the current branch */
+func getCurrentBranch() (res string, e error) {
+	gitCmd := exec.Command("git", "rev-parse", "--abbrev-ref", "HEAD")
+
+	output, err := gitCmd.Output()
+	if err != nil {
+		return "", fmt.Errorf("Error running git rev-parse: %w", err)
+	}
+
+	branchName := strings.TrimSpace(string(output))
+
+	if branchName == "main" || branchName == "master" {
+		return "", fmt.Errorf("Cannot run on %s branch", branchName)
+	}
+
+	return branchName, nil
+}
+
+/* Gets the project SSH or HTTPS url */
+func getProjectUrl() (res string, e error) {
+	cmd := exec.Command("git", "remote", "get-url", "origin")
+	url, err := cmd.Output()
+
+	if err != nil {
+		return "", fmt.Errorf("Could not get origin remote")
+	}
+
+	return strings.TrimSpace(string(url)), nil
+}