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#!/usr/bin/env -S python3 -u
"""
ADOdb release build script

- Create release tag if it does not exist
- Copy release files to target directory
- Generate zip/tar balls

This file is part of ADOdb, a Database Abstraction Layer library for PHP.

@package ADOdb
@link https://adodb.org Project's web site and documentation
@link https://github.com/ADOdb/ADOdb Source code and issue tracker

The ADOdb Library is dual-licensed, released under both the BSD 3-Clause
and the GNU Lesser General Public Licence (LGPL) v2.1 or, at your option,
any later version. This means you can use it in proprietary products.
See the LICENSE.md file distributed with this source code for details.
@license BSD-3-Clause
@license LGPL-2.1-or-later

@copyright 2013 Damien Regad, Mark Newnham and the ADOdb community
@author Damien Regad
"""

import errno
import getopt
import re
import os
from os import path
import shutil
import subprocess
import sys
import tempfile

import updateversion


# ADOdb Repository reference
origin_repo = "https://github.com/ADOdb/ADOdb.git"
release_branch = "master"
release_prefix = "adodb"

# Directories and files to exclude from release tarballs
# For consistency, this should match the list in .gitattributes
exclude_list = (".git*",
                ".mailmap",
                "replicate",
                "scripts",
                "tests",
                "cute_icons_for_site",
                ".idea",
                )

# Command-line options
options = "hb:dfk"
long_options = ["help", "branch=", "debug", "fresh", "keep"]

# Global flags
debug_mode = False
fresh_clone = False
cleanup = True


def usage():
    """
    Print script's command-line arguments help.
    """
    print('''Usage: {} [options] version release_path

    Parameters:
        version                 ADOdb version to bundle (e.g. v5.19)
        release_path            Where to save the release tarballs

    Options:
        -h | --help             Show this usage message

        -b | --branch <branch>  Use specified branch (defaults to '{}' for '.0'
                                releases, or 'hotfix/<version>' for patches)
        -d | --debug            Debug mode (ignores upstream: no fetch, allows
                                build even if local branch is not in sync)
        -f | --fresh            Create a fresh clone of the repository
        -k | --keep             Keep build directories after completion
                                (useful for debugging)
'''.format(
        path.basename(__file__),
        release_branch
    ))
# end usage()


def set_version_and_tag(version):
    global release_branch, debug_mode, fresh_clone, cleanup

    # Delete existing tag to force creation in debug mode
    if debug_mode:
        try:
            updateversion.tag_delete(version)
        except subprocess.CalledProcessError:
            pass

    # Checkout release branch
    subprocess.call("git checkout {}".format(release_branch), shell=True)

    if not debug_mode:
        # Make sure we're up-to-date, ignore untracked files
        ret = subprocess.check_output(
            "git status --branch --porcelain --untracked-files=no",
            text=True,
            shell=True
        )
        if not re.search(release_branch + "$", ret):
            print("\nERROR: branch must be aligned with upstream")
            sys.exit(4)

    # Update the code, create commit and tag
    updateversion.version_set(version)

    # Make sure we don't delete the modified repo
    if fresh_clone:
        cleanup = False


def main():
    global release_branch, debug_mode, fresh_clone, cleanup

    # Get command-line options
    try:
        opts, args = getopt.gnu_getopt(sys.argv[1:], options, long_options)
    except getopt.GetoptError as err:
        print(str(err))
        usage()
        sys.exit(2)

    if len(args) < 2:
        usage()
        print("ERROR: please specify the version and release_path")
        sys.exit(1)

    for opt, val in opts:
        if opt in ("-h", "--help"):
            usage()
            sys.exit(0)

        elif opt in ("-b", "--branch"):
            release_branch = val

        elif opt in ("-d", "--debug"):
            debug_mode = True

        elif opt in ("-f", "--fresh"):
            fresh_clone = True

        elif opt in ("-k", "--keep"):
            cleanup = False

    # Mandatory parameters
    version = updateversion.version_check(args[0])
    release_path = args[1]

    # Default release branch
    if updateversion.version_is_patch(version):
        release_branch = 'hotfix/' + version.rsplit('.', 1)[0]

    # -------------------------------------------------------------------------
    # Start the build
    #
    global release_prefix

    print("Building ADOdb release {} into '{}'\n".format(
        version,
        release_path
    ))

    if debug_mode:
        print("DEBUG MODE: ignoring upstream repository status")

    if fresh_clone:
        # Create a new repo clone
        print("Cloning a new repository")
        repo_path = tempfile.mkdtemp(prefix=release_prefix + "-",
                                     suffix=".git")
        subprocess.call(
            "git clone {} {}".format(origin_repo, repo_path),
            shell=True
        )
        os.chdir(repo_path)
    else:
        # Git repo's root directory
        repo_path = updateversion.git_root()
        os.chdir(repo_path)

        # Check for any uncommitted changes
        try:
            subprocess.check_output(
                "git diff --exit-code && "
                "git diff --cached --exit-code",
                shell=True
                )
        except subprocess.CalledProcessError:
            print("ERROR: there are uncommitted changes in the repository")
            sys.exit(3)

        # Update the repository
        if not debug_mode:
            print("Updating repository in '{}'".format(os.getcwd()))
            try:
                subprocess.check_output("git fetch", shell=True)
            except subprocess.CalledProcessError:
                print("ERROR: unable to fetch\n")
                sys.exit(3)

    # Check existence of Tag for version in repo, create if not found
    try:
        updateversion.tag_check(version)
        if debug_mode:
            set_version_and_tag(version)
    except subprocess.CalledProcessError:
        set_version_and_tag(version)

    # Copy files to release dir
    release_files = release_prefix + version.split(".")[0]
    release_tmp_dir = path.join(release_path, release_files)
    print("Copying release files to '{}'".format(release_tmp_dir))
    retry = True
    while True:
        try:
            shutil.copytree(
                repo_path,
                release_tmp_dir,
                ignore=shutil.ignore_patterns(*exclude_list)
            )
            break
        except OSError as err:
            # First try and file exists, try to delete dir
            if retry and err.errno == errno.EEXIST:
                print("WARNING: Directory '{}' exists, delete it and retry"
                      .format(release_tmp_dir))
                shutil.rmtree(release_tmp_dir)
                retry = False
                continue
            else:
                # We already tried to delete or some other error occurred
                raise

    # Create tarballs
    print("Creating release tarballs...")
    release_name = release_prefix + '-' + version

    os.chdir(release_path)
    print("- tar")
    subprocess.call(
        "tar -czf {}.tar.gz {}".format(release_name, release_files),
        shell=True
    )
    print("- zip")
    subprocess.call(
        "zip -rq {}.zip {}".format(release_name, release_files),
        shell=True
    )

    if cleanup:
        print("Deleting working directories")
        shutil.rmtree(release_tmp_dir)
        if fresh_clone:
            shutil.rmtree(repo_path)
    else:
        print("\nThe following working directories were kept:")
        if fresh_clone:
            print("- '{}' (repo clone)".format(repo_path))
        print("- '{}' (release temp dir)".format(release_tmp_dir))
        print("Delete them manually when they are no longer needed.")

    # Done
    print("\nADOdb release {} build complete, files saved in '{}'.".format(
        version,
        release_path
    ))
    print("Don't forget to generate a README file with the changelog")

# end main()


if __name__ == "__main__":
    main()