Initial basic implementation

.commit.json

@@ -0,0 +1,3 @@
+{
+    "issueRegex": "#[0-9]+"
+}

.gitignore

@@ -7,6 +7,7 @@
 *.dll
 *.so
 *.dylib
+commit
 
 # Test binary, built with `go test -c`
 *.test

config.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+type commitConfig struct {
+	IssueRegex string `json:"issueRegex"`
+}
+
+// Reads .commit.json file from current directory and unmarshals it into commitConfig struct
+func readCommitConfig() commitConfig {
+
+	configFilePath := default_config_file_path
+
+	_, err := os.Stat(configFilePath)
+	if os.IsNotExist(err) {
+		return commitConfig{}
+	}
+
+	file, err := os.ReadFile(configFilePath)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, red("Error reading %s file: %v\n"), err, configFilePath)
+		os.Exit(1)
+	}
+
+	var cfg commitConfig
+	err = json.Unmarshal(file, &cfg)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, red("Error unmarshalling %s file: %v\n"), err, configFilePath)
+		os.Exit(1)
+	}
+
+	return cfg
+}

constants.go

@@ -0,0 +1,6 @@
+package main
+
+const (
+	default_config_file_path = ".commit.json"
+	default_issue_regex      = "#[0-9]+"
+)

go.mod

@@ -0,0 +1,29 @@
+module github.com/artem-y/commit
+
+go 1.21.4
+
+require github.com/go-git/go-git/v5 v5.12.0
+
+require (
+	dario.cat/mergo v1.0.0 // indirect
+	github.com/Microsoft/go-winio v0.6.1 // indirect
+	github.com/ProtonMail/go-crypto v1.0.0 // indirect
+	github.com/cloudflare/circl v1.3.7 // indirect
+	github.com/cyphar/filepath-securejoin v0.2.4 // indirect
+	github.com/emirpasic/gods v1.18.1 // indirect
+	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
+	github.com/go-git/go-billy/v5 v5.5.0 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
+	github.com/kevinburke/ssh_config v1.2.0 // indirect
+	github.com/pjbgf/sha1cd v0.3.0 // indirect
+	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
+	github.com/skeema/knownhosts v1.2.2 // indirect
+	github.com/xanzy/ssh-agent v0.3.3 // indirect
+	golang.org/x/crypto v0.21.0 // indirect
+	golang.org/x/mod v0.12.0 // indirect
+	golang.org/x/net v0.22.0 // indirect
+	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/tools v0.13.0 // indirect
+	gopkg.in/warnings.v0 v0.1.2 // indirect
+)

go.sum

@@ -0,0 +1,145 @@
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main.go

@@ -0,0 +1,134 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing"
+	"github.com/go-git/go-git/v5/plumbing/object"
+)
+
+func main() {
+	commitMessage := getCommitMessage()
+
+	issueRegex := default_issue_regex
+
+	commitCfg := readCommitConfig()
+	if commitCfg.IssueRegex != "" {
+		issueRegex = commitCfg.IssueRegex
+	}
+
+	repo := openRepo()
+	headRef := getCurrentHead(repo)
+
+	// Read branch name or HEAD
+	if headRef.Name().IsBranch() {
+
+		branchName := headRef.Name().Short()
+		matches := findIssueMatchesInBranch(issueRegex, branchName)
+
+		if len(matches) > 0 {
+			joinedIssues := strings.Join(matches, ", ")
+			commitMessage = fmt.Sprintf("[%s]: %s", joinedIssues, commitMessage)
+		}
+
+		commitChanges(repo, commitMessage)
+
+		fmt.Println(commitMessage)
+
+	} else if headRef.Name().IsTag() {
+		fmt.Printf("HEAD is a tag: %v\n", headRef.Name().Short())
+	} else {
+		fmt.Printf("Detached HEAD at %v\n", headRef.Hash())
+	}
+}
+
+// Reads commit message from command line arguments
+func getCommitMessage() string {
+	args := os.Args[1:]
+	if len(args) < 1 {
+		fmt.Fprintln(os.Stderr, red("Commit message cannot be empty"))
+		os.Exit(1)
+	}
+
+	return args[0]
+}
+
+// Opens the repository in current directory
+func openRepo() *git.Repository {
+	repo, err := git.PlainOpen(".")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, red("Failed to open repository: %v\n"), err)
+		os.Exit(1)
+	}
+	return repo
+}
+
+// Reads the current HEAD reference
+func getCurrentHead(repo *git.Repository) *plumbing.Reference {
+	headRef, err := repo.Head()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, red("Failed to read current HEAD: %v\n"), err)
+		os.Exit(1)
+	}
+	return headRef
+}
+
+// Opens worktree
+func openWorktree(repo *git.Repository) *git.Worktree {
+	worktree, err := repo.Worktree()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, red("Failed to open worktree: %v\n"), err)
+		os.Exit(1)
+	}
+	return worktree
+}
+
+// Wraps the message string in red color
+func red(msg string) string {
+	return fmt.Sprintf("\033[31m%s\033[0m", msg)
+}
+
+// Searches the branch name for issue numbers matching the given regex
+func findIssueMatchesInBranch(rgxRaw string, branchName string) []string {
+	rgx := regexp.MustCompile(rgxRaw)
+
+	allSubmatches := rgx.FindAllStringSubmatch(branchName, -1)
+
+	matches := []string{}
+	for _, submatches := range allSubmatches {
+		matches = append(matches, submatches[0])
+	}
+
+	return matches
+}
+
+// Creates commit options with the author information
+func makeCommitOptions(usr user) git.CommitOptions {
+	return git.CommitOptions{
+		Author: &object.Signature{
+			Name:  usr.name,
+			Email: usr.email,
+			When:  time.Now(),
+		},
+		AllowEmptyCommits: false,
+		Amend:             false,
+	}
+}
+
+// Commits changes with provided message
+func commitChanges(repo *git.Repository, commitMessage string) {
+	worktree := openWorktree(repo)
+	usr := getUser(*repo)
+	commitOptions := makeCommitOptions(usr)
+
+	_, err := worktree.Commit(commitMessage, &commitOptions)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, red("Failed to commit: %v\n"), err)
+		os.Exit(1)
+	}
+}