fix(parser): continue on unparsable commit message (#48)

We should not fail the whole process if a single commit message is
unparsable.

Instead we now log the issue and ignore the commit.

internal/commitparser/conventionalcommits/conventionalcommits.go

@@ -2,6 +2,7 @@ package conventionalcommits
 
 import (
 	"fmt"
+	"log/slog"
 
 	"github.com/leodido/go-conventionalcommits"
 	"github.com/leodido/go-conventionalcommits/parser"
@@ -12,9 +13,10 @@ import (
 
 type Parser struct {
 	machine conventionalcommits.Machine
+	logger  *slog.Logger
 }
 
-func NewParser() *Parser {
+func NewParser(logger *slog.Logger) *Parser {
 	parserMachine := parser.NewMachine(
 		parser.WithBestEffort(),
 		parser.WithTypes(conventionalcommits.TypesConventional),
@@ -22,6 +24,7 @@ func NewParser() *Parser {
 
 	return &Parser{
 		machine: parserMachine,
+		logger:  logger,
 	}
 }
 
@@ -31,8 +34,10 @@ func (c *Parser) Analyze(commits []git.Commit) ([]commitparser.AnalyzedCommit, e
 	for _, commit := range commits {
 		msg, err := c.machine.Parse([]byte(commit.Message))
 		if err != nil {
-			return nil, fmt.Errorf("failed to parse message of commit %q: %w", commit.Hash, err)
+			c.logger.Warn("failed to parse message of commit, skipping", "commit.hash", commit.Hash, "err", err)
+			continue
 		}
+
 		conventionalCommit, ok := msg.(*conventionalcommits.ConventionalCommit)
 		if !ok {
 			return nil, fmt.Errorf("unable to get ConventionalCommit from parser result: %T", msg)

internal/commitparser/conventionalcommits/conventionalcommits_test.go

@@ -1,6 +1,7 @@
 package conventionalcommits
 
 import (
+	"log/slog"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -23,14 +24,14 @@ func TestAnalyzeCommits(t *testing.T) {
 			wantErr:         assert.NoError,
 		},
 		{
-			name: "malformed commit message",
+			name: "skips malformed commit message",
 			commits: []git.Commit{
 				{
 					Message: "aksdjaklsdjka",
 				},
 			},
-			expectedCommits: nil,
-			wantErr:         assert.Error,
+			expectedCommits: []commitparser.AnalyzedCommit{},
+			wantErr:         assert.NoError,
 		},
 		{
 			name: "drops unreleasable",
@@ -114,7 +115,7 @@ func TestAnalyzeCommits(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			analyzedCommits, err := NewParser().Analyze(tt.commits)
+			analyzedCommits, err := NewParser(slog.Default()).Analyze(tt.commits)
 			if !tt.wantErr(t, err) {
 				return
 			}