git-importer/lib/git.py

import fnmatch
import logging
import os
import pathlib
import subprocess

import requests

from lib.binary import BINARY

LFS_SUFFIX = "filter=lfs diff=lfs merge=lfs -text"


class Git:
    """Local git repository"""

    def __init__(self, path, committer=None, committer_email=None):
        self.path = pathlib.Path(path)
        self.committer = committer
        self.committer_email = committer_email

    def exists(self):
        """Check if the path is a valid git repository"""
        return (self.path / ".git").exists()

    def create(self):
        """Create a local git repository"""
        self.path.mkdir(parents=True, exist_ok=True)
        self.open()

    def git_run(self, args, **kwargs):
        """Run a git command"""
        if "env" in kwargs:
            envs = kwargs["env"].copy()
            del kwargs["env"]
        else:
            envs = os.environ.copy()
        envs["GIT_LFS_SKIP_SMUDGE"] = "1"
        envs["GIT_CONFIG_GLOBAL"] = "/dev/null"
        return subprocess.run(
            ["git"] + args,
            cwd=self.path,
            check=True,
            env=envs,
            **kwargs,
        )

    def open(self):
        if not self.exists():
            self.git_run(["init", "--object-format=sha256", "-b", "factory"])

    def is_dirty(self):
        """Check if there is something to commit"""
        status_str = self.git_run(
            ["status", "--porcelain=2"],
            stdout=subprocess.PIPE,
        ).stdout.decode("utf-8")
        return len(list(filter(None, status_str.split("\n")))) > 0

    def branches(self):
        br = (
            self.git_run(
                ["for-each-ref", "--format=%(refname:short)", "refs/heads/"],
                stdout=subprocess.PIPE,
            )
            .stdout.decode("utf-8")
            .split()
        )
        if len(br) == 0:
            br.append("factory")  # unborn branch?
        return br

    def branch(self, branch, commit="HEAD"):
        commit = (
            self.git_run(
                ["rev-parse", "--verify", "--end-of-options", commit + "^{commit}"],
                stdout=subprocess.PIPE,
            )
            .stdout.decode("utf-8")
            .strip()
        )
        return self.git_run(["branch", branch, commit])

    def checkout(self, branch):
        """Checkout into the branch HEAD"""
        new_branch = False
        if branch not in self.branches():
            self.git_run(["branch", "-q", branch, "HEAD"])
            new_branch = True
        else:
            ref = f"refs/heads/{branch}"
            if (self.path / ".git" / ref).exists():
                self.git_run(["switch", "--no-guess", "-q", branch])
        return new_branch

    def commit(
        self,
        user,
        user_email,
        user_time,
        message,
        parents=None,
        committer=None,
        committer_email=None,
        committer_time=None,
    ):
        """Add all the files and create a new commit in the current HEAD"""

        if not committer:
            committer = self.committer if self.committer else self.user
            committer_email = (
                self.committer_email if self.committer_email else self.user_email
            )
            committer_time = committer_time if committer_time else user_time

        if self.is_dirty():
            self.git_run(["add", "--all", "."])

        tree_id = (
            self.git_run(["write-tree"], stdout=subprocess.PIPE)
            .stdout.decode("utf-8")
            .strip()
        )

        parent_array = []
        if isinstance(parents, list):
            for parent in filter(None, parents):
                parent_array = parent_array + ["-p", parent]
        elif isinstance(parents, str):
            parent_array = ["-p", parents]

        commit_id = (
            self.git_run(
                ["commit-tree"] + parent_array + [tree_id],
                env={
                    "GIT_AUTHOR_NAME": user,
                    "GIT_AUTHOR_EMAIL": user_email,
                    "GIT_AUTHOR_DATE": f"{int(user_time.timestamp())} +0000",
                    "GIT_COMMITTER_NAME": committer,
                    "GIT_COMMITTER_EMAIL": committer_email,
                    "GIT_COMMITTER_DATE": f"{int(committer_time.timestamp())} +0000",
                },
                input=message.encode("utf-8"),
                stdout=subprocess.PIPE,
            )
            .stdout.decode("utf-8")
            .rstrip()
        )
        self.git_run(["reset", "--soft", commit_id])
        return commit_id

    def branch_head(self, branch="HEAD"):
        return (
            self.git_run(
                ["rev-parse", "--verify", "--end-of-options", branch],
                stdout=subprocess.PIPE,
            )
            .stdout.decode("utf-8")
            .strip()
        )

    def set_branch_head(self, branch, commit):
        return self.git_run(["update-ref", f"refs/heads/{branch}", commit])

    def gc(self):
        logging.debug(f"Garbage recollect and repackage {self.path}")
        self.git_run(
            ["gc", "--auto"],
            stdout=subprocess.PIPE,
            stderr=subprocess.STDOUT,
        )

    #    def clean(self):
    #        for path, _ in self.repo.status().items():
    #            logging.debug(f"Cleaning {path}")
    #            try:
    #                (self.path / path).unlink()
    #                self.repo.index.remove(path)
    #            except Exception as e:
    #                logging.warning(f"Error removing file {path}: {e}")

    def add(self, filename):
        self.git_run(["add", filename])

    def add_default_lfs_gitattributes(self, force=False):
        if not (self.path / ".gitattributes").exists() or force:
            with (self.path / ".gitattributes").open("w") as f:
                content = ["## Default LFS"]
                content += [f"*{b} {LFS_SUFFIX}" for b in sorted(BINARY)]
                f.write("\n".join(content))
                f.write("\n")
            self.add(".gitattributes")

    def add_specific_lfs_gitattributes(self, binaries):
        self.add_default_lfs_gitattributes(force=True)
        if binaries:
            with (self.path / ".gitattributes").open("a") as f:
                content = ["## Specific LFS patterns"]
                content += [f"{b} {LFS_SUFFIX}" for b in sorted(binaries)]
                f.write("\n".join(content))
                f.write("\n")
        self.add(".gitattributes")

    def get_specific_lfs_gitattributes(self):
        with (self.path / ".gitattributes").open() as f:
            patterns = [
                line.split()[0]
                for line in f
                if line.strip() and not line.startswith("#")
            ]
        binary = {f"*{b}" for b in BINARY}
        return [p for p in patterns if p not in binary]

    def add_lfs(self, filename, sha256, size):
        with (self.path / filename).open("w") as f:
            f.write("version https://git-lfs.github.com/spec/v1\n")
            f.write(f"oid sha256:{sha256}\n")
            f.write(f"size {size}\n")
        self.add(filename)

        if not self.is_lfs_tracked(filename):
            logging.debug(f"Add specific LFS file {filename}")
            specific_patterns = self.get_specific_lfs_gitattributes()
            specific_patterns.append(filename)
            self.add_specific_lfs_gitattributes(specific_patterns)

    def is_lfs_tracked(self, filename):
        with (self.path / ".gitattributes").open() as f:
            patterns = (
                line.split()[0]
                for line in f
                if line.strip() and not line.startswith("#")
            )
            return any(fnmatch.fnmatch(filename, line) for line in patterns)

    def remove(self, file: pathlib.Path):
        self.git_run(
            ["rm", "-q", "-f", "--ignore-unmatch", file.name],
        )
        patterns = self.get_specific_lfs_gitattributes()
        if file.name in patterns:
            patterns.remove(file.name)
            self.add_specific_lfs_gitattributes(patterns)

    def add_gitea_remote(self, package):
        repo_name = package.replace("+", "_")
        org_name = "rpm"

        if not os.getenv("GITEA_TOKEN"):
            logging.warning("Not adding a remote due to missing $GITEA_TOKEN")
            return

        url = f"https://src.opensuse.org/api/v1/org/{org_name}/repos"
        response = requests.post(
            url,
            data={"name": repo_name},
            headers={"Authorization": f"token {os.getenv('GITEA_TOKEN')}"},
            timeout=10,
        )
        # 409 Conflict (Already existing)
        # 201 Created
        if response.status_code not in (201, 409):
            print(response.data)
        url = f"gitea@src.opensuse.org:{org_name}/{repo_name}.git"
        self.git_run(
            ["remote", "add", "origin", url],
        )

    def push(self, force=False):
        if "origin" not in self.git_run(
            ["remote"],
            stdout=subprocess.PIPE,
        ).stdout.decode("utf-8"):
            logger.warning("Not pushing to remote because no 'origin' configured")
            return

        cmd = ["push"]
        if force:
            cmd.append("-f")
        cmd.append("origin")
        cmd.append("refs/heads/factory")
        cmd.append("refs/heads/devel")
        self.git_run(cmd)