admin: Add link to forge

admin/sync/file.go

@@ -6,6 +6,7 @@ import (
 	"encoding/base32"
 	"fmt"
 	"io"
+	"net/url"
 	"os"
 	"path"
 	"strings"
@@ -46,6 +47,12 @@ type DirectAccessImporter interface {
 	GetLocalPath(p ...string) string
 }
 
+// ForgeLinkedImporter abstracts importer that are linked to a forge
+type ForgeLinkedImporter interface {
+	GetThemeLink(th *fic.Theme) (*url.URL, error)
+	GetExerciceLink(e *fic.Exercice) (*url.URL, error)
+}
+
 // GlobalImporter stores the main importer instance to use for global imports.
 var GlobalImporter Importer
 

admin/sync/importer_git_common.go

@@ -2,9 +2,13 @@ package sync
 
 import (
 	"bufio"
+	"net/url"
 	"os"
+	"regexp"
 )
 
+var gitRemoteRe = regexp.MustCompile(`^(?:(?:git@|https://)([\w.@]+)(?:/|:))((?:[\w-_]+)/(?:[\w-_/]+))(?:.git){0,1}(?:(?:/){0,1})$`)
+
 func countFileInDir(dirname string) (int, error) {
 	files, err := os.ReadDir(dirname)
 	if err != nil {
@@ -45,3 +49,11 @@ func (i GitImporter) stat(filename string) (os.FileInfo, error) {
 func (i GitImporter) Kind() string {
 	return "git originated from " + i.Remote + " on " + i.li.Kind()
 }
+
+func getForgeBaseLink(remote string) (u *url.URL, err error) {
+	res := gitRemoteRe.FindStringSubmatch(remote)
+	u, err = url.Parse(res[2])
+	u.Scheme = "https"
+	u.Host = res[1]
+	return
+}

admin/sync/importer_gitbin.go

@@ -8,10 +8,13 @@ import (
 	"errors"
 	"fmt"
 	"log"
+	"net/url"
 	"os"
 	"os/exec"
 	"path"
 	"strings"
+
+	"srs.epita.fr/fic-server/libfic"
 )
 
 // GitImporter implements an Importer, where files to imports are located
@@ -133,3 +136,75 @@ func (i GitImporter) Sync() error {
 	log.Println("Local git repository synchronized successfully")
 	return nil
 }
+
+func (i GitImporter) GetThemeLink(th *fic.Theme) (u *url.URL, err error) {
+	prefix := ""
+
+	if _, err = os.Stat(path.Join(i.li.Base, ".gitmodules")); !errors.Is(err, os.ErrNotExist) {
+		thdir := path.Join(i.li.Base, th.Path)
+		cmdremote := exec.Command("git", "-C", thdir, "remote", "get-url", "origin")
+		var stdout []byte
+		stdout, err = cmdremote.CombinedOutput()
+		if err != nil {
+			return
+		}
+
+		u, err = getForgeBaseLink(string(bytes.TrimSpace(stdout)))
+
+		// Search .git directory
+		for {
+			if _, err = os.Stat(path.Join(thdir, ".git")); !errors.Is(err, os.ErrNotExist) {
+				break
+			}
+
+			thdir, _ = path.Split(thdir)
+		}
+		prefix = strings.TrimPrefix(thdir, i.li.Base)
+	} else {
+		u, err = getForgeBaseLink(i.Remote)
+	}
+
+	if err != nil {
+		return
+	}
+
+	u.Path = path.Join(u.Path, "-", "tree", "master", strings.TrimPrefix(th.Path, prefix))
+
+	return
+}
+
+func (i GitImporter) GetExerciceLink(e *fic.Exercice) (u *url.URL, err error) {
+	prefix := ""
+
+	if _, err = os.Stat(path.Join(i.li.Base, ".gitmodules")); !errors.Is(err, os.ErrNotExist) {
+		exdir := path.Join(i.li.Base, e.Path)
+		cmdremote := exec.Command("git", "-C", exdir, "remote", "get-url", "origin")
+		var stdout []byte
+		stdout, err = cmdremote.CombinedOutput()
+		if err != nil {
+			return
+		}
+
+		u, err = getForgeBaseLink(string(bytes.TrimSpace(stdout)))
+
+		// Search .git directory
+		for {
+			if _, err = os.Stat(path.Join(exdir, ".git")); !errors.Is(err, os.ErrNotExist) {
+				break
+			}
+
+			exdir, _ = path.Split(exdir)
+		}
+		prefix = strings.TrimPrefix(exdir, i.li.Base)
+	} else {
+		u, err = getForgeBaseLink(i.Remote)
+	}
+
+	if err != nil {
+		return
+	}
+
+	u.Path = path.Join(u.Path, "-", "tree", "master", strings.TrimPrefix(e.Path, prefix))
+
+	return
+}