forked from Plemya-x/ALR
372 lines
9.1 KiB
Go
372 lines
9.1 KiB
Go
// This file was originally part of the project "LURE - Linux User REpository", created by Elara Musayelyan.
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// It has been modified as part of "ALR - Any Linux Repository" by Евгений Храмов.
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//
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// ALR - Any Linux Repository
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// Copyright (C) 2025 Евгений Храмов
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package repos
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import (
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"context"
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"errors"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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"github.com/go-git/go-billy/v5"
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"github.com/go-git/go-billy/v5/osfs"
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"github.com/go-git/go-git/v5"
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"github.com/go-git/go-git/v5/plumbing"
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"github.com/pelletier/go-toml/v2"
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"go.elara.ws/vercmp"
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"mvdan.cc/sh/v3/expand"
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"mvdan.cc/sh/v3/interp"
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"mvdan.cc/sh/v3/syntax"
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"gitea.plemya-x.ru/Plemya-x/ALR/internal/config"
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"gitea.plemya-x.ru/Plemya-x/ALR/internal/db"
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"gitea.plemya-x.ru/Plemya-x/ALR/internal/shutils/handlers"
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"gitea.plemya-x.ru/Plemya-x/ALR/internal/types"
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"gitea.plemya-x.ru/Plemya-x/ALR/pkg/loggerctx"
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)
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type actionType uint8
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const (
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actionDelete actionType = iota
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actionUpdate
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)
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type action struct {
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Type actionType
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File string
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}
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// Pull pulls the provided repositories. If a repo doesn't exist, it will be cloned
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// and its packages will be written to the DB. If it does exist, it will be pulled.
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// In this case, only changed packages will be processed if possible.
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// If repos is set to nil, the repos in the ALR config will be used.
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func (rs *Repos) Pull(ctx context.Context, repos []types.Repo) error {
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log := loggerctx.From(ctx)
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if repos == nil {
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repos = rs.cfg.Repos(ctx)
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}
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for _, repo := range repos {
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repoURL, err := url.Parse(repo.URL)
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if err != nil {
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return err
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}
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log.Info("Pulling repository").Str("name", repo.Name).Send()
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repoDir := filepath.Join(config.GetPaths(ctx).RepoDir, repo.Name)
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var repoFS billy.Filesystem
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gitDir := filepath.Join(repoDir, ".git")
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// Only pull repos that contain valid git repos
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if fi, err := os.Stat(gitDir); err == nil && fi.IsDir() {
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r, err := git.PlainOpen(repoDir)
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if err != nil {
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return err
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}
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w, err := r.Worktree()
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if err != nil {
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return err
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}
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old, err := r.Head()
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if err != nil {
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return err
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}
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err = w.PullContext(ctx, &git.PullOptions{Progress: os.Stderr})
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if errors.Is(err, git.NoErrAlreadyUpToDate) {
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log.Info("Repository up to date").Str("name", repo.Name).Send()
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} else if err != nil {
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return err
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}
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repoFS = w.Filesystem
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// Make sure the DB is created even if the repo is up to date
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if !errors.Is(err, git.NoErrAlreadyUpToDate) || rs.db.IsEmpty(ctx) {
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new, err := r.Head()
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if err != nil {
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return err
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}
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// If the DB was not present at startup, that means it's
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// empty. In this case, we need to update the DB fully
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// rather than just incrementally.
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if rs.db.IsEmpty(ctx) {
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err = rs.processRepoFull(ctx, repo, repoDir)
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if err != nil {
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return err
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}
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} else {
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err = rs.processRepoChanges(ctx, repo, r, w, old, new)
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if err != nil {
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return err
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}
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}
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}
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} else {
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err = os.RemoveAll(repoDir)
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if err != nil {
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return err
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}
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err = os.MkdirAll(repoDir, 0o755)
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if err != nil {
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return err
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}
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_, err = git.PlainCloneContext(ctx, repoDir, false, &git.CloneOptions{
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URL: repoURL.String(),
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Progress: os.Stderr,
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})
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if err != nil {
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return err
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}
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err = rs.processRepoFull(ctx, repo, repoDir)
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if err != nil {
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return err
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}
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repoFS = osfs.New(repoDir)
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}
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fl, err := repoFS.Open("alr-repo.toml")
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if err != nil {
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log.Warn("Git repository does not appear to be a valid ALR repo").Str("repo", repo.Name).Send()
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continue
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}
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var repoCfg types.RepoConfig
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err = toml.NewDecoder(fl).Decode(&repoCfg)
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if err != nil {
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return err
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}
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fl.Close()
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// If the version doesn't have a "v" prefix, it's not a standard version.
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// It may be "unknown" or a git version, but either way, there's no way
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// to compare it to the repo version, so only compare versions with the "v".
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if strings.HasPrefix(config.Version, "v") {
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if vercmp.Compare(config.Version, repoCfg.Repo.MinVersion) == -1 {
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log.Warn("ALR repo's minumum ALR version is greater than the current version. Try updating ALR if something doesn't work.").Str("repo", repo.Name).Send()
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}
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}
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}
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return nil
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}
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func (rs *Repos) processRepoChanges(ctx context.Context, repo types.Repo, r *git.Repository, w *git.Worktree, old, new *plumbing.Reference) error {
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oldCommit, err := r.CommitObject(old.Hash())
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if err != nil {
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return err
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}
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newCommit, err := r.CommitObject(new.Hash())
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if err != nil {
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return err
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}
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patch, err := oldCommit.Patch(newCommit)
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if err != nil {
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return err
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}
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var actions []action
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for _, fp := range patch.FilePatches() {
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from, to := fp.Files()
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if !isValid(from, to) {
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continue
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}
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if to == nil {
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actions = append(actions, action{
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Type: actionDelete,
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File: from.Path(),
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})
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} else if from == nil {
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actions = append(actions, action{
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Type: actionUpdate,
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File: to.Path(),
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})
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} else {
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if from.Path() != to.Path() {
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actions = append(actions,
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action{
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Type: actionDelete,
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File: from.Path(),
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},
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action{
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Type: actionUpdate,
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File: to.Path(),
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},
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)
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} else {
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actions = append(actions, action{
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Type: actionUpdate,
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File: to.Path(),
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})
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}
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}
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}
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repoDir := w.Filesystem.Root()
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parser := syntax.NewParser()
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for _, action := range actions {
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env := append(os.Environ(), "scriptdir="+filepath.Dir(filepath.Join(repoDir, action.File)))
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runner, err := interp.New(
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interp.Env(expand.ListEnviron(env...)),
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interp.ExecHandler(handlers.NopExec),
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interp.ReadDirHandler(handlers.RestrictedReadDir(repoDir)),
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interp.StatHandler(handlers.RestrictedStat(repoDir)),
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interp.OpenHandler(handlers.RestrictedOpen(repoDir)),
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interp.StdIO(handlers.NopRWC{}, handlers.NopRWC{}, handlers.NopRWC{}),
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)
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if err != nil {
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return err
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}
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switch action.Type {
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case actionDelete:
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if filepath.Base(action.File) != "alr.sh" {
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continue
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}
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scriptFl, err := oldCommit.File(action.File)
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if err != nil {
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return nil
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}
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r, err := scriptFl.Reader()
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if err != nil {
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return nil
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}
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var pkg db.Package
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err = parseScript(ctx, parser, runner, r, &pkg)
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if err != nil {
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return err
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}
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err = rs.db.DeletePkgs(ctx, "name = ? AND repository = ?", pkg.Name, repo.Name)
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if err != nil {
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return err
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}
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case actionUpdate:
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if filepath.Base(action.File) != "alr.sh" {
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action.File = filepath.Join(filepath.Dir(action.File), "alr.sh")
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}
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scriptFl, err := newCommit.File(action.File)
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if err != nil {
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return nil
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}
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r, err := scriptFl.Reader()
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if err != nil {
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return nil
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}
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pkg := db.Package{
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Description: db.NewJSON(map[string]string{}),
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Homepage: db.NewJSON(map[string]string{}),
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Maintainer: db.NewJSON(map[string]string{}),
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Depends: db.NewJSON(map[string][]string{}),
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BuildDepends: db.NewJSON(map[string][]string{}),
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Repository: repo.Name,
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}
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err = parseScript(ctx, parser, runner, r, &pkg)
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if err != nil {
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return err
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}
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resolveOverrides(runner, &pkg)
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err = rs.db.InsertPackage(ctx, pkg)
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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func (rs *Repos) processRepoFull(ctx context.Context, repo types.Repo, repoDir string) error {
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glob := filepath.Join(repoDir, "/*/alr.sh")
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matches, err := filepath.Glob(glob)
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if err != nil {
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return err
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}
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parser := syntax.NewParser()
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for _, match := range matches {
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env := append(os.Environ(), "scriptdir="+filepath.Dir(match))
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runner, err := interp.New(
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interp.Env(expand.ListEnviron(env...)),
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interp.ExecHandler(handlers.NopExec),
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interp.ReadDirHandler(handlers.RestrictedReadDir(repoDir)),
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interp.StatHandler(handlers.RestrictedStat(repoDir)),
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interp.OpenHandler(handlers.RestrictedOpen(repoDir)),
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interp.StdIO(handlers.NopRWC{}, handlers.NopRWC{}, handlers.NopRWC{}),
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)
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if err != nil {
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return err
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}
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scriptFl, err := os.Open(match)
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if err != nil {
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return err
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}
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pkg := db.Package{
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Description: db.NewJSON(map[string]string{}),
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Homepage: db.NewJSON(map[string]string{}),
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Maintainer: db.NewJSON(map[string]string{}),
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Depends: db.NewJSON(map[string][]string{}),
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BuildDepends: db.NewJSON(map[string][]string{}),
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Repository: repo.Name,
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}
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err = parseScript(ctx, parser, runner, scriptFl, &pkg)
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if err != nil {
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return err
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}
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resolveOverrides(runner, &pkg)
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err = rs.db.InsertPackage(ctx, pkg)
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if err != nil {
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return err
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}
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}
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return nil
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}
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