action.yml

@@ -0,0 +1,5 @@
+name: 'Pull Request Lint'
+description: 'Validates a pull request for semantical commit message'
+runs:
+  using: 'go'
+  main: 'main.go'

go.mod

@@ -0,0 +1,13 @@
+module git.kjan.de/actions/pull-request-lint
+
+go 1.24.2
+
+require (
+	code.gitea.io/sdk/gitea v0.21.0 // indirect
+	github.com/42wim/httpsig v1.2.2 // indirect
+	github.com/davidmz/go-pageant v1.0.2 // indirect
+	github.com/go-fed/httpsig v1.1.0 // indirect
+	github.com/hashicorp/go-version v1.7.0 // indirect
+	golang.org/x/crypto v0.33.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
+)

go.sum

@@ -0,0 +1,26 @@
+code.gitea.io/sdk/gitea v0.21.0 h1:69n6oz6kEVHRo1+APQQyizkhrZrLsTLXey9142pfkD4=
+code.gitea.io/sdk/gitea v0.21.0/go.mod h1:tnBjVhuKJCn8ibdyyhvUyxrR1Ca2KHEoTWoukNhXQPA=
+github.com/42wim/httpsig v1.2.2 h1:ofAYoHUNs/MJOLqQ8hIxeyz2QxOz8qdSVvp3PX/oPgA=
+github.com/42wim/httpsig v1.2.2/go.mod h1:P/UYo7ytNBFwc+dg35IubuAUIs8zj5zzFIgUCEl55WY=
+github.com/davidmz/go-pageant v1.0.2 h1:bPblRCh5jGU+Uptpz6LgMZGD5hJoOt7otgT454WvHn0=
+github.com/davidmz/go-pageant v1.0.2/go.mod h1:P2EDDnMqIwG5Rrp05dTRITj9z2zpGcD9efWSkTNKLIE=
+github.com/go-fed/httpsig v1.1.0 h1:9M+hb0jkEICD8/cAiNqEB66R87tTINszBRTjwjQzWcI=
+github.com/go-fed/httpsig v1.1.0/go.mod h1:RCMrTZvN1bJYtofsG4rd5NaO5obxQ5xBkdiS7xsT7bM=
+github.com/hashicorp/go-version v1.7.0 h1:5tqGy27NaOTB8yJKUZELlFAS/LTKJkrmONwQKeRZfjY=
+github.com/hashicorp/go-version v1.7.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
+golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
+golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

internal/gitea/gitea.go

@@ -0,0 +1,16 @@
+package gitea
+
+import (
+	"fmt"
+	"os"
+
+	"code.gitea.io/sdk/gitea"
+)
+
+func getPrTitle() {
+	_, err := gitea.NewClient("https://git.kjan.de")
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}

internal/validation/validation.go

@@ -0,0 +1,83 @@
+package validation
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+func ValidateConventionalCommit(commit string) error {
+	// Regex to match the commit format
+	// type(scope)!: description
+	// or
+	// type!: description
+	// or
+	// type: description
+	re := regexp.MustCompile(`^(?P<type>[a-z]+)(?P<scope>\([a-z]+\))?(?P<breaking>!)?: (?P<description>[a-z].+)$`)
+	match := re.FindStringSubmatch(commit)
+
+	if len(match) == 0 {
+		return fmt.Errorf("invalid commit format")
+	}
+
+	typeIndex := re.SubexpIndex("type")
+	scopeIndex := re.SubexpIndex("scope")
+	breakingIndex := re.SubexpIndex("breaking")
+	descriptionIndex := re.SubexpIndex("description")
+
+	commitType := match[typeIndex]
+	scope := match[scopeIndex]
+	breaking := match[breakingIndex]
+	description := match[descriptionIndex]
+
+	// Type MUST be lowercase
+	if commitType != strings.ToLower(commitType) {
+		return fmt.Errorf("type must be lowercase")
+	}
+
+	// Description MUST start with lowercase
+	if description != strings.ToLower(description) {
+		return fmt.Errorf("description must start with lowercase")
+	}
+
+	// Scope MUST be lowercase
+	if scope != "" && scope != strings.ToLower(scope) {
+		return fmt.Errorf("scope must be lowercase")
+	}
+
+	// Check for breaking change indicator
+	hasBreakingChangeFooter := strings.Contains(commit, "BREAKING CHANGE:")
+	if breaking == "!" && hasBreakingChangeFooter {
+		return fmt.Errorf("breaking change indicator and footer are mutually exclusive")
+	}
+
+	lines := strings.Split(commit, "\n")
+	if len(lines) > 1 {
+		body := strings.Join(lines[1:], "\n")
+		// Check if body is separated from description by a blank line
+		if !strings.HasPrefix(body, "\n") {
+			return fmt.Errorf("body must be separated from description by a blank line")
+		}
+	}
+
+	// Check for footers
+	footerRegex := regexp.MustCompile(`(?m)^(?P<token>[A-Za-z-]+|BREAKING CHANGE): (?P<value>.*)$`)
+	footerMatches := footerRegex.FindAllStringSubmatch(commit, -1)
+
+	for _, footerMatch := range footerMatches {
+		tokenIndex := footerRegex.SubexpIndex("token")
+		token := footerMatch[tokenIndex]
+
+		// BREAKING-CHANGE MUST be synonymous with BREAKING CHANGE
+		if token == "BREAKING-CHANGE" {
+			continue
+		}
+
+		// Token MUST use - in place of whitespace characters, except for BREAKING CHANGE
+		if token != "BREAKING CHANGE" && strings.Contains(token, " ") {
+			return fmt.Errorf("footer token must use - in place of whitespace characters")
+		}
+	}
+
+	return nil
+}

main.go

@@ -0,0 +1,11 @@
+package pullrequestlint
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	prTitle := os.Getenv("GITEA_PULL_REQUEST_TITLE")
+	fmt.Println(prTitle)
+}