feat: file check

squash all previous commits

.gitmodules

@@ -38,6 +38,34 @@
 	path = examples/keyword/clangtidy/sillycode
 	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
 	branch = keyword/clangtidy/sillycode
+[submodule "examples/healthcheck/asciifile"]
+	path = examples/healthcheck/asciifile
+	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
+	branch = healthcheck/asciifile
+[submodule "examples/healthcheck/asciimsg"]
+	path = examples/healthcheck/asciimsg
+	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
+	branch = healthcheck/asciimsg
+[submodule "examples/healthcheck/forbiddenfile"]
+	path = examples/healthcheck/forbiddenfile
+	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
+	branch = healthcheck/forbiddenfile
+[submodule "examples/healthcheck/meta"]
+	path = examples/healthcheck/meta
+	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
+	branch = healthcheck/meta
+[submodule "examples/healthcheck/release"]
+	path = examples/healthcheck/release
+	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
+	branch = healthcheck/release
+[submodule "examples/healthcheck/reposize"]
+	path = examples/healthcheck/reposize
+	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
+	branch = healthcheck/reposize
+[submodule "examples/healthcheck/repoverify"]
+	path = examples/healthcheck/repoverify
+	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
+	branch = healthcheck/repoverify
 [submodule "examples/cppcheck/sillycode"]
 	path = examples/cppcheck/sillycode
 	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git

README.md

@@ -84,3 +84,7 @@ Check the `Result` at <https://github.com/criyle/go-judge#rest-api-interface>.
 
 -   `Score int`: score of the stage.
 -   `Comment string`: comment on the stage.
+
+### HealthCheck
+
+The repohealth check will return a json list to for check result. The structure of json file is in `pkg/healthcheck/util.go`

cmd/healthcheck/main.go

@@ -0,0 +1,78 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"os"
+
+	"focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/pkg/healthcheck"
+)
+
+// parseMultiValueFlag parses a multi-value command-line flag and appends its values to the provided slice.
+// It registers a flag with the specified name and description, associating it with a multiStringValue receiver.
+func parseMultiValueFlag(values *[]string, flagName, description string) {
+	flag.Var((*multiStringValue)(values), flagName, description)
+}
+
+type multiStringValue []string
+
+// Set appends a new value to the multiStringValue slice.
+// It satisfies the flag.Value interface, allowing multiStringValue to be used as a flag value.
+func (m *multiStringValue) Set(value string) error {
+	*m = append(*m, value)
+	return nil
+}
+
+func (m *multiStringValue) String() string {
+	return fmt.Sprintf("%v", *m)
+}
+
+// Generally, err is used for runtime errors, and checkRes is used for the result of the checks.
+func main() {
+	var info []healthcheck.CheckStage
+	var gitWhitelist, metaFile, releaseTags []string
+	var tmp healthcheck.CheckStage
+
+	rootDir := flag.String("root", "", "")
+	repo := flag.String("repo", "", "")
+	droneBranch := flag.String("droneBranch", "", "")
+	releaseCategories := flag.String("releaseCategories", "", "")
+	releaseNumber := flag.Int("releaseNumber", 0, "")
+	// FIXME: for drone usage
+	adminDir := flag.String("admin", "", "") // adminDir is for config files
+	parseMultiValueFlag(&gitWhitelist, "whitelist", "")
+	parseMultiValueFlag(&metaFile, "meta", "")
+	parseMultiValueFlag(&releaseTags, "releaseTags", "")
+	flag.Parse()
+
+	tmp = healthcheck.RepoSize()
+	info = append(info, tmp)
+
+	tmp = healthcheck.ForbiddenCheck(*rootDir, gitWhitelist, *repo, *droneBranch)
+	info = append(info, tmp)
+
+	tmp = healthcheck.MetaCheck(*rootDir, metaFile)
+	info = append(info, tmp)
+
+	tmp = healthcheck.NonAsciiFiles(*rootDir)
+	info = append(info, tmp)
+
+	tmp = healthcheck.NonAsciiMsg(*rootDir)
+	info = append(info, tmp)
+
+	// TODO: find a way to test the release tag
+	tmp = healthcheck.CheckReleases(*rootDir, *releaseCategories, *releaseNumber)
+	info = append(info, tmp)
+
+	// FIXME: for drone usage
+	tmp = healthcheck.Verify(*rootDir, *adminDir)
+	info = append(info, tmp)
+
+	jsonData, err := json.Marshal(info)
+	if err != nil {
+		fmt.Fprint(os.Stderr, err)
+		os.Exit(1)
+	}
+	fmt.Printf("%s", jsonData)
+}

cmd/joj3/main_test.go

@@ -14,6 +14,18 @@ import (
 
 func compareStageResults(t *testing.T, actual, expected []stage.StageResult, regex bool) {
 	t.Helper()
+
+	// For Test
+	fmt.Println("Actual:")
+	for _, result := range actual {
+		fmt.Println(result)
+	}
+
+	fmt.Println("Expected:")
+	for _, result := range expected {
+		fmt.Println(result)
+	}
+
 	if len(actual) != len(expected) {
 		t.Fatalf("len(actual) = %d, expected %d", len(actual), len(expected))
 	}

examples/healthcheck/asciifile

@@ -0,0 +1 @@
+Subproject commit 46804afd2ebe8787a9d43711b191e424134ce25b

examples/healthcheck/asciimsg

@@ -0,0 +1 @@
+Subproject commit e9ed6a464a507730ef956bb8ea6dbe84fffea7ad

examples/healthcheck/forbiddenfile

@@ -0,0 +1 @@
+Subproject commit 245d036af0cbfe3745ef303d239a2d7225067d0b

examples/healthcheck/meta

@@ -0,0 +1 @@
+Subproject commit 4f5e444940d2c383a0b069405e2ef42b01878bc5

examples/healthcheck/release

@@ -0,0 +1 @@
+Subproject commit a4cedea002a198c2dae373f7ee6f6dc67753fae6

examples/healthcheck/reposize

@@ -0,0 +1 @@
+Subproject commit d78308bcaaaeda9ead86069652288ae911503e33

examples/healthcheck/repoverify

@@ -0,0 +1 @@
+Subproject commit a7a3bd0894c2e727e3ab3f9ddda3d438fbb86b30

internal/parsers/all.go

@@ -5,6 +5,7 @@ import (
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/cppcheck"
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/cpplint"
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/diff"
+	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/healthcheck"
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/keyword"
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/resultstatus"
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/sample"

internal/parsers/healthcheck/meta.go

@@ -0,0 +1,9 @@
+package healthcheck
+
+import "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/stage"
+
+var name = "healthcheck"
+
+func init() {
+	stage.RegisterParser(name, &Healthcheck{})
+}

internal/parsers/healthcheck/parser.go

@@ -0,0 +1,49 @@
+package healthcheck
+
+import (
+	// "encoding/json"
+	"fmt"
+
+	"focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/stage"
+	// "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/pkg/healthcheck"
+	"github.com/criyle/go-judge/envexec"
+)
+
+type Conf struct {
+	Score   int
+	Comment string
+}
+
+type Healthcheck struct{}
+
+func Parse(executorResult stage.ExecutorResult, conf Conf) stage.ParserResult {
+	stdout := executorResult.Files["stdout"]
+	stderr := executorResult.Files["stderr"]
+	if executorResult.Status != stage.Status(envexec.StatusAccepted) {
+		return stage.ParserResult{
+			Score: 0,
+			Comment: fmt.Sprintf(
+				"Unexpected executor status: %s.\nStderr: %s",
+				executorResult.Status, stderr,
+			),
+		}
+	}
+	return stage.ParserResult{
+		Score:   0,
+		Comment: stdout,
+	}
+}
+
+func (*Healthcheck) Run(results []stage.ExecutorResult, confAny any) (
+	[]stage.ParserResult, bool, error,
+) {
+	conf, err := stage.DecodeConf[Conf](confAny)
+	if err != nil {
+		return nil, true, err
+	}
+	var res []stage.ParserResult
+	for _, result := range results {
+		res = append(res, Parse(result, *conf))
+	}
+	return res, false, nil
+}

internal/parsers/keyword/parser.go

@@ -57,13 +57,13 @@ func (*Keyword) Run(results []stage.ExecutorResult, confAny any) (
 		return nil, true, err
 	}
 	var res []stage.ParserResult
-	forceQuit := false
+	end := false
 	for _, result := range results {
 		tmp, matched := Parse(result, *conf)
 		if matched && conf.EndOnMatch {
-			forceQuit = true
+			end = true
 		}
 		res = append(res, tmp)
 	}
-	return res, forceQuit, nil
+	return res, end, nil
 }

internal/parsers/resultstatus/parser.go

@@ -19,12 +19,12 @@ func (*ResultStatus) Run(results []stage.ExecutorResult, confAny any) (
 	if err != nil {
 		return nil, true, err
 	}
-	forceQuit := false
+	end := false
 	var res []stage.ParserResult
 	for _, result := range results {
 		comment := ""
 		if result.Status != stage.Status(envexec.StatusAccepted) {
-			forceQuit = true
+			end = true
 			comment = fmt.Sprintf(
 				"Unexpected executor status: %s.", result.Status,
 			)
@@ -34,5 +34,5 @@ func (*ResultStatus) Run(results []stage.ExecutorResult, confAny any) (
 			Comment: comment,
 		})
 	}
-	return res, forceQuit, nil
+	return res, end, nil
 }

internal/stage/model.go

@@ -164,7 +164,6 @@ type ParserResult struct {
 }
 
 type StageResult struct {
-	Name      string         `json:"name"`
+	Name    string         `json:"name"`
-	Results   []ParserResult `json:"results"`
+	Results []ParserResult `json:"results"`
-	ForceQuit bool           `json:"force_quit"`
 }

internal/stage/run.go

@@ -26,18 +26,17 @@ func Run(stages []Stage) []StageResult {
 			slog.Error("parser not found", "name", stage.ParserName)
 			break
 		}
-		parserResults, forceQuit, err := parser.Run(executorResults, stage.ParserConf)
+		parserResults, end, err := parser.Run(executorResults, stage.ParserConf)
 		if err != nil {
 			slog.Error("parser run error", "name", stage.ExecutorName, "error", err)
 			break
 		}
 		slog.Debug("parser run done", "results", parserResults)
 		stageResults = append(stageResults, StageResult{
-			Name:      stage.Name,
+			Name:    stage.Name,
-			Results:   parserResults,
+			Results: parserResults,
-			ForceQuit: forceQuit,
 		})
-		if forceQuit {
+		if end {
 			break
 		}
 	}

pkg/healthcheck/commit.go

@@ -0,0 +1,83 @@
+package healthcheck
+
+import (
+	"fmt"
+	"strings"
+	"unicode"
+
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing/object"
+)
+
+// nonAsciiMsg checks for non-ASCII characters in the commit message.
+// If the message starts with "Merge pull request", it skips the non-ASCII characters check.
+// Otherwise, it iterates over each character in the message and checks if it is a non-ASCII character.
+// If a non-ASCII character is found, it returns an error indicating not to use non-ASCII characters in commit messages.
+// Otherwise, it returns nil indicating that the commit message is valid.
+func NonAsciiMsg(root string) (jsonOut CheckStage) {
+	jsonOut = CheckStage{
+		Name:     "NonAsciiMsg",
+		StdOut:   "Checking for non-ASCII characters in commit message: ",
+		ExitCode: 0,
+		StdErr:   "",
+	}
+
+	// cmd := exec.Command("git", "log", "--encoding=UTF-8", "--format=%B")
+	repo, err := git.PlainOpen(root)
+	if err != nil {
+		jsonOut.StdOut += "Failed"
+		jsonOut.ExitCode = 1
+		jsonOut.ErrorLog = fmt.Errorf("Error openning git repo%w", err)
+		return jsonOut
+	}
+
+	ref, err := repo.Head()
+	if err != nil {
+		jsonOut.StdOut += "Failed"
+		jsonOut.ExitCode = 1
+		jsonOut.ErrorLog = fmt.Errorf("Error getting reference%w", err)
+		return jsonOut
+	}
+	commits, err := repo.Log(&git.LogOptions{From: ref.Hash()})
+	if err != nil {
+		jsonOut.StdOut += "Failed"
+		jsonOut.ExitCode = 1
+		jsonOut.ErrorLog = fmt.Errorf("Error getting commits%w", err)
+		return jsonOut
+	}
+
+	var msgs []string
+	err = commits.ForEach(func(c *object.Commit) error {
+		msgs = append(msgs, c.Message)
+		return nil
+	})
+	if err != nil {
+		jsonOut.StdOut += "Failed"
+		jsonOut.ExitCode = 1
+		jsonOut.ErrorLog = fmt.Errorf("Error converting log to string%w", err)
+		return jsonOut
+	}
+
+	var nonAsciiMsgs []string
+	for _, msg := range msgs {
+		if msg == "" {
+			continue
+		}
+		if strings.HasPrefix(msg, "Merge pull request") {
+			continue
+		}
+		for _, c := range msg {
+			if c > unicode.MaxASCII {
+				nonAsciiMsgs = append(nonAsciiMsgs, msg)
+			}
+		}
+	}
+	if len(nonAsciiMsgs) > 0 {
+		jsonOut.StdOut += "Failed"
+		jsonOut.ExitCode = 105
+		jsonOut.StdErr = "Non-ASCII characters in commit messages:\n" + strings.Join(nonAsciiMsgs, "\n")
+		return jsonOut
+	}
+	jsonOut.StdOut += "OK"
+	return jsonOut
+}

pkg/healthcheck/forbidden.go

@@ -0,0 +1,94 @@
+package healthcheck
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"regexp"
+)
+
+// getForbiddens retrieves a list of forbidden files in the specified root directory.
+// It searches for files that do not match the specified regex patterns in the given file list.
+func getForbiddens(root string, fileList []string) ([]string, error) {
+	var matches []string
+
+	var regexList []*regexp.Regexp
+	regexList, err := getRegex(fileList)
+	if err != nil {
+		fmt.Println("Error compiling regex:", err)
+		return nil, err
+	}
+
+	err = filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if info.IsDir() {
+			if info.Name() == ".git" || info.Name() == ".gitea" || info.Name() == "ci" {
+				return filepath.SkipDir
+			} else {
+				return nil
+			}
+		}
+
+		match := false
+		for _, regex := range regexList {
+			if regex.MatchString(info.Name()) {
+				match = true
+				break
+			}
+		}
+
+		if !match {
+			matches = append(matches, path)
+		}
+		return nil
+	})
+
+	return matches, err
+}
+
+// forbiddenCheck checks for forbidden files in the specified root directory.
+// It prints the list of forbidden files found, along with instructions on how to fix them.
+func ForbiddenCheck(rootDir string, regexList []string, repo string, droneBranch string) (jsonOut CheckStage) {
+	jsonOut = CheckStage{
+		Name:     "forbiddenFile",
+		StdOut:   "Checking forbidden files: ",
+		ExitCode: 0,
+		StdErr:   "",
+	}
+
+	// INFO: test case
+	// regexList := []string{`\.$`, `\.git`, `\.drone.yml`, `Makefile`, `CMakeLists.txt`,`.*\.go`,`.*\.toml`, `.*\.c`, `.*\.cc`, `.*\.cpp`, `.*\.h`, `.*\.md`}
+	// rootDir = "/Users/zhouzhaojiacheng/Desktop/STUDENT_ORG/TechJI/Dev/joj/JOJ3"
+
+	forbids, err := getForbiddens(rootDir, regexList)
+	if err != nil {
+		jsonOut.StdOut += "Failed"
+		jsonOut.ExitCode = 1
+		jsonOut.ErrorLog = err
+		return jsonOut
+	}
+
+	var message string
+
+	if len(forbids) > 0 {
+		message += fmt.Sprint(103, "the following forbidden files were found: ")
+		for _, file := range forbids {
+			message += fmt.Sprint(file, ", ")
+		}
+		message += "\n\nTo fix it, first make a backup of your repository and then run the following commands:\nfor i in "
+		for _, file := range forbids {
+			message += fmt.Sprint(file, " ")
+		}
+		message += fmt.Sprint("; do git filter-repo --force --invert-paths --path \\\"\\$i\\\"; done\ngit remote add origin ", repo, "\ngit push --set-upstream origin ", droneBranch, " --force")
+		jsonOut.StdOut += "Failed"
+		jsonOut.ExitCode = 103
+		jsonOut.StdErr = message
+		return jsonOut
+	} else {
+		jsonOut.StdOut += "OK"
+		return jsonOut
+	}
+}

pkg/healthcheck/main.go

@@ -1 +0,0 @@
-package healthcheck

pkg/healthcheck/meta.go

@@ -0,0 +1,86 @@
+package healthcheck
+
+import (
+	"fmt"
+	"os"
+)
+
+// getMetas retrieves a list of metadata files that are expected to exist in the specified root directory.
+// It checks for the existence of each file in the fileList and provides instructions if any file is missing.
+func getMetas(rootDir string, fileList []string) ([]string, string, error) {
+	addExt(fileList, "\\.*")
+	regexList, err := getRegex(fileList)
+	var unmatchedList []string
+
+	if err != nil {
+		return nil, "", err
+	}
+
+	files, err := os.ReadDir(rootDir)
+	if err != nil {
+		return nil, "", fmt.Errorf("Error reading directory:%w", err)
+	}
+
+	matched := false
+	umatchedRes := ""
+
+	// TODO: it seems that there is no good find subsitution now
+	// modify current code if exist a better solution
+	for i, regex := range regexList {
+		for _, file := range files {
+			if file.IsDir() {
+				continue
+			}
+
+			if regex.MatchString(file.Name()) {
+				matched = true
+				break
+			}
+		}
+		if !matched {
+			unmatchedList = append(unmatchedList, fileList[i])
+			str := fmt.Sprint("\tno ", fileList[i], " file found")
+			switch fileList[i] {
+			case "readme\\.*":
+				str += ", please refer to https://www.makeareadme.com/ for more information"
+			case "changelog\\.*":
+				str += ", please refer to https://keepachangelog.com/en/1.1.0/ for more information"
+			default:
+				str += ""
+			}
+			str += "\n"
+
+			umatchedRes += str
+		}
+	}
+
+	return unmatchedList, umatchedRes, nil
+}
+
+// metaCheck performs a check for metadata files in the specified root directory.
+// It prints a message if any required metadata files are missing.
+func MetaCheck(rootDir string, fileList []string) (jsonOut CheckStage) {
+	unmatchedList, umatchedRes, err := getMetas(rootDir, fileList)
+	jsonOut = CheckStage{
+		Name:     "metaFile",
+		StdOut:   "Checking the existence of meta file: ",
+		ExitCode: 0,
+		StdErr:   "",
+	}
+
+	if err != nil {
+		jsonOut.ExitCode = 1
+		jsonOut.ErrorLog = err
+		return jsonOut
+	}
+
+	if len(unmatchedList) == 0 {
+		jsonOut.StdOut += "OK"
+		return jsonOut
+	} else {
+		jsonOut.ExitCode = 104
+		jsonOut.StdOut += "Failed"
+		jsonOut.StdErr = fmt.Sprintf("%d important project files missing\n"+umatchedRes, len(unmatchedList))
+		return jsonOut
+	}
+}

pkg/healthcheck/nonascii.go

@@ -0,0 +1,90 @@
+package healthcheck
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"unicode"
+)
+
+// getNonAscii retrieves a list of files in the specified root directory that contain non-ASCII characters.
+// It searches for non-ASCII characters in each file's content and returns a list of paths to files containing non-ASCII characters.
+func getNonAscii(root string) ([]string, error) {
+	var nonAscii []string
+
+	err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if info.IsDir() {
+			if info.Name() == ".git" || info.Name() == ".gitea" || info.Name() == "ci" {
+				return filepath.SkipDir
+			} else {
+				return nil
+			}
+		}
+
+		if info.Name() == "healthcheck" {
+			return nil
+		}
+
+		file, err := os.Open(path)
+		if err != nil {
+			return err
+		}
+		defer file.Close()
+
+		scanner := bufio.NewScanner(file)
+		for scanner.Scan() {
+			cont := true
+			for _, c := range scanner.Text() {
+				if c > unicode.MaxASCII {
+					nonAscii = append(nonAscii, "\t"+path)
+					cont = false
+					break
+				}
+			}
+			if !cont {
+				break
+			}
+		}
+
+		return nil
+	})
+
+	return nonAscii, err
+}
+
+// nonAsciiFiles checks for non-ASCII characters in files within the specified root directory.
+// It prints a message with the paths to files containing non-ASCII characters, if any.
+func NonAsciiFiles(root string) (jsonOut CheckStage) {
+	jsonOut = CheckStage{
+		Name:     "NonAsciiFiles",
+		StdOut:   "Checking for non-ascii files: ",
+		ExitCode: 0,
+		StdErr:   "",
+	}
+	nonAscii, err := getNonAscii(root)
+	if err != nil {
+		jsonOut.StdOut += "Failed"
+		jsonOut.ExitCode = 1
+		jsonOut.ErrorLog = err
+		return jsonOut
+	}
+
+	var nonAsciiRes string
+	if len(nonAscii) > 0 {
+		nonAsciiRes = fmt.Sprintf("Non-ASCII characters found in the following files:\n" + strings.Join(nonAscii, "\n"))
+		jsonOut.ExitCode = 105
+		jsonOut.StdOut += "Failed"
+	} else {
+		jsonOut.StdOut += "OK"
+	}
+
+	jsonOut.StdErr = nonAsciiRes
+
+	return jsonOut
+}

pkg/healthcheck/release.go

@@ -0,0 +1,88 @@
+package healthcheck
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing"
+)
+
+func catTags(all []string) (out string) {
+	out = ""
+	for _, str := range all {
+		out += str + " "
+	}
+	return out
+}
+
+func getTagsFromRepo(repoPath string) ([]string, error) {
+	repo, err := git.PlainOpen(repoPath)
+	if err != nil {
+		return nil, fmt.Errorf("Cannot open repo: %v", err)
+	}
+
+	refs, err := repo.Tags()
+	if err != nil {
+		return nil, fmt.Errorf("Cannot get tags: %v", err)
+	}
+
+	var tags []string
+	err = refs.ForEach(func(ref *plumbing.Reference) error {
+		tags = append(tags, ref.Name().Short())
+		return nil
+	})
+	if err != nil {
+		return nil, fmt.Errorf("Error while iterating tags: %v", err)
+	}
+
+	return tags, nil
+}
+
+func CheckReleases(repoPath string, category string, n int) (jsonOut CheckStage) {
+	jsonOut = CheckStage{
+		Name:     "ReleaseCheck",
+		StdOut:   "Checking release tag: ",
+		ExitCode: 0,
+		StdErr:   "",
+	}
+
+	tags, err := getTagsFromRepo(repoPath)
+	if err != nil {
+		log.Fatalf("Error in getting tags: %v", err)
+	}
+
+	var prefix string
+
+	switch category {
+	case "exam":
+		prefix = "e"
+	case "project":
+		prefix = "p"
+	case "homework":
+		prefix = "h"
+	default:
+		prefix = "a"
+	}
+
+	target := prefix + fmt.Sprintf("%d", n)
+	found := false
+	for _, tag := range tags {
+		if tag == target {
+			found = true
+			break
+		}
+	}
+	if !found {
+		tagList := catTags(tags)
+		jsonOut.ExitCode = 107
+		jsonOut.StdOut = "Failed"
+		jsonOut.StdErr = fmt.Sprintf("wrong release tag '%s', please use one of %s aborting", target, tagList)
+		return jsonOut
+	}
+
+	jsonOut.StdOut += "OK"
+	jsonOut.ExitCode = 0
+	jsonOut.StdErr = "Fine"
+	return jsonOut
+}

pkg/healthcheck/reposize.go

@@ -0,0 +1,56 @@
+package healthcheck
+
+import (
+	"fmt"
+	"os/exec"
+	"strconv"
+	"strings"
+)
+
+// RepoSize checks the size of the repository to determine if it is oversized.
+// It executes the 'git count-objects -v' command to obtain the size information,
+func RepoSize() (jsonOut CheckStage) {
+	jsonOut = CheckStage{
+		Name:     "RepoSize",
+		StdOut:   "Checking repository size: ",
+		ExitCode: 0,
+		StdErr:   "",
+	}
+
+	// TODO: reimplement here when go-git is available
+	// https://github.com/go-git/go-git/blob/master/COMPATIBILITY.md
+	cmd := exec.Command("git", "count-objects", "-v")
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		jsonOut.StdOut += "Failed"
+		jsonOut.ExitCode = 1
+		jsonOut.ErrorLog = fmt.Errorf("Error running git command:%w", err)
+		return jsonOut
+	}
+
+	lines := strings.Split(string(output), "\n")
+	var sum int
+	for _, line := range lines {
+		if strings.Contains(line, "size") {
+			fields := strings.Fields(line)
+			sizeStr := fields[1]
+			size, err := strconv.Atoi(sizeStr)
+			if err != nil {
+				jsonOut.StdOut += "Failed"
+				jsonOut.ExitCode = 1
+				jsonOut.ErrorLog = fmt.Errorf("Error running git command:%w", err)
+				return jsonOut
+			}
+			sum += size
+		}
+	}
+
+	if sum <= 2048 {
+		jsonOut.StdOut += "OK"
+		return jsonOut
+	}
+	jsonOut.StdOut += "Failed"
+	jsonOut.ExitCode = 100
+	jsonOut.StdErr = "repository larger than 2MB, please clean up or contact the teaching team."
+	return jsonOut
+}

pkg/healthcheck/utils.go

@@ -0,0 +1,39 @@
+package healthcheck
+
+import (
+	"fmt"
+	"regexp"
+)
+
+// For ExitCode, see https://focs.ji.sjtu.edu.cn/git/TAs/resources/src/branch/drone/dronelib.checks
+// 1 for unrecoverable error and 0 for succeses
+type CheckStage struct {
+	Name     string `json:"name of check"`
+	StdOut   string `json:"stdout"`
+	ExitCode int    `json:"exit code"`
+	StdErr   string `json:"stderr"`
+	ErrorLog error  `json:"errorLog"`
+}
+
+// addExt appends the specified extension to each file name in the given fileList.
+// It modifies the original fileList in place.
+func addExt(fileList []string, ext string) {
+	for i, file := range fileList {
+		fileList[i] = file + ext
+	}
+}
+
+// getRegex compiles each regex pattern in the fileList into a []*regexp.Regexp slice.
+// It returns a slice containing compiled regular expressions.
+func getRegex(fileList []string) ([]*regexp.Regexp, error) {
+	var regexList []*regexp.Regexp
+	for _, pattern := range fileList {
+		regex, err := regexp.Compile("(?i)" + pattern)
+		if err != nil {
+			return nil, fmt.Errorf("Error compiling regex:%w", err)
+		}
+		regexList = append(regexList, regex)
+	}
+
+	return regexList, nil
+}

pkg/healthcheck/verify.go

@@ -0,0 +1,114 @@
+package healthcheck
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// fileExists checks if a file exists at the specified path.
+func fileExists(filePath string) bool {
+	_, err := os.Stat(filePath)
+	return !os.IsNotExist(err)
+}
+
+// filesMatch checks if two files are identical.
+func filesMatch(file1, file2 string) (bool, error) {
+	f1, err := os.Open(file1)
+	if err != nil {
+		return false, err
+	}
+	defer f1.Close()
+
+	f2, err := os.Open(file2)
+	if err != nil {
+		return false, err
+	}
+	defer f2.Close()
+
+	scanner1 := bufio.NewScanner(f1)
+	scanner2 := bufio.NewScanner(f2)
+
+	for scanner1.Scan() && scanner2.Scan() {
+		line1 := scanner1.Text()
+		line2 := scanner2.Text()
+
+		if line1 != line2 {
+			return false, nil
+		}
+	}
+
+	if scanner1.Scan() || scanner2.Scan() {
+		// One file has more lines than the other
+		return false, nil
+	}
+
+	return true, nil
+}
+
+// compareDirectories compares the contents of two directories.
+func compareDirectories(dir1, dir2 string, jsonOut *CheckStage) error {
+	allMatch := true
+	var message string
+	err := filepath.Walk(dir1, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if !info.IsDir() {
+			relPath, _ := filepath.Rel(dir1, path)
+			file2 := filepath.Join(dir2, relPath)
+
+			if !fileExists(file2) {
+				// fmt.Printf("File %s in %s is missing in %s\n, please immediately revert your changes!\n", relPath, dir1, dir2)
+				message += "File missing"
+				allMatch = false
+				jsonOut.StdOut += "Failed"
+				jsonOut.ExitCode = 101
+				jsonOut.StdErr = message
+				return nil
+			}
+
+			// fmt.Printf("Checking integrity of %s:\n", path)
+			match, err := filesMatch(path, file2)
+			if err != nil {
+				return err
+			}
+
+			if !match {
+				// fmt.Printf("File %s in %s is not identical to %s\nPlease revert your changes or contact the teaching team if you have a valid reason for adjusting them.\n", relPath, dir1, dir2)
+				message += "File is not identical"
+				allMatch = false
+				jsonOut.StdOut += "Failed"
+				jsonOut.ExitCode = 101
+				jsonOut.StdErr = message
+			}
+		}
+		return nil
+	})
+
+	if allMatch {
+		jsonOut.StdOut += "OK!"
+	} else {
+		jsonOut.StdOut += "Failed!"
+	}
+
+	return err
+}
+
+// Verify checks if the contents of two directories are identical.
+func Verify(rootDir, compareDir string) CheckStage {
+	jsonOut := CheckStage{
+		Name:     "verifyFile",
+		StdOut:   "Checking files to be verified: ",
+		ExitCode: 0,
+		StdErr:   "",
+	}
+	err := compareDirectories(rootDir, compareDir, &jsonOut)
+	// fmt.Println("Comparison finished ")
+	if err != nil {
+		fmt.Println("Error:", err)
+	}
+	return jsonOut
+}