bin/process_plug_in_packages.py

#!/usr/bin/env python3

r"""
See help text for details.
"""

import os
import subprocess
import sys

save_dir_path = sys.path.pop(0)

modules = [
    "gen_arg",
    "gen_print",
    "gen_valid",
    "gen_plug_in",
    "gen_cmd",
    "gen_misc",
]
for module in modules:
    exec("from " + module + " import *")

sys.path.insert(0, save_dir_path)

# Create parser object.
parser = argparse.ArgumentParser(
    usage="%(prog)s [OPTIONS]",
    description="%(prog)s will process the plug-in packages passed to it."
    + "  A plug-in package is essentially a directory containing"
    + " one or more call point programs.  Each of these call point"
    + ' programs must have a prefix of "cp_".  When calling'
    + " %(prog)s, a user must provide a call_point parameter"
    + " (described below).  For each plug-in package passed,"
    + " %(prog)s will check for the presence of the specified call"
    + " point program in the plug-in directory.  If it is found,"
    + " %(prog)s will run it.  It is the responsibility of the"
    + " caller to set any environment variables needed by the call"
    + " point programs.\n\nAfter each call point program"
    + " has been run, %(prog)s will print the following values in"
    + " the following formats for use by the calling program:\n"
    + "  failed_plug_in_name:               <failed plug-in value,"
    + " if any>\n  shell_rc:                          "
    + "<shell return code value of last call point program - this"
    + " will be printed in hexadecimal format.  Also, be aware"
    + " that if a call point program returns a value it will be"
    + " shifted left 2 bytes (e.g. rc of 2 will be printed as"
    + " 0x00000200).  That is because the rightmost byte is"
    + " reserved for errors in calling the call point program"
    + " rather than errors generated by the call point program.>",
    formatter_class=argparse.ArgumentDefaultsHelpFormatter,
    prefix_chars="-+",
)

# Create arguments.
parser.add_argument(
    "plug_in_dir_paths",
    nargs="?",
    default="",
    help=plug_in_dir_paths_help_text + default_string,
)

parser.add_argument(
    "--call_point",
    default="setup",
    required=True,
    help="The call point program name.  This value must not include the"
    + ' "cp_" prefix.  For each plug-in package passed to this program,'
    + " the specified call_point program will be called if it exists in"
    + " the plug-in directory."
    + default_string,
)

parser.add_argument(
    "--allow_shell_rc",
    default="0x00000000",
    help="The user may supply a value other than zero to indicate an"
    + " acceptable non-zero return code.  For example, if this value"
    + " equals 0x00000200, it means that for each plug-in call point that"
    + " runs, a 0x00000200 will not be counted as a failure.  See note"
    + " above regarding left-shifting of return codes."
    + default_string,
)

parser.add_argument(
    "--stop_on_plug_in_failure",
    default=1,
    type=int,
    choices=[1, 0],
    help="If this parameter is set to 1, this program will stop and return "
    + "non-zero if the call point program from any plug-in directory "
    + "fails.  Conversely, if it is set to false, this program will run "
    + "the call point program from each and every plug-in directory "
    + "regardless of their return values.  Typical example cases where "
    + "you'd want to run all plug-in call points regardless of success "
    + 'or failure would be "cleanup" or "ffdc" call points.',
)

parser.add_argument(
    "--stop_on_non_zero_rc",
    default=0,
    type=int,
    choices=[1, 0],
    help="If this parm is set to 1 and a plug-in call point program returns "
    + 'a valid non-zero return code (see "allow_shell_rc" parm above),'
    + " this program will stop processing and return 0 (success).  Since"
    + " this constitutes a successful exit, this would normally be used"
    + " where the caller wishes to stop processing if one of the plug-in"
    + " directory call point programs returns a special value indicating"
    + " that some special case has been found.  An example might be in"
    + ' calling some kind of "check_errl" call point program.  Such a'
    + " call point program might return a 2 (i.e. 0x00000200) to indicate"
    + ' that a given error log entry was found in an "ignore" list and is'
    + " therefore to be ignored.  That being the case, no other"
    + ' "check_errl" call point program would need to be called.'
    + default_string,
)

parser.add_argument(
    "--mch_class", default="obmc", help=mch_class_help_text + default_string
)

# Populate stock_list with options we want.
stock_list = [("test_mode", 0), ("quiet", 1), ("debug", 0)]

original_path = os.environ.get("PATH")


def validate_parms():
    r"""
    Validate program parameters, etc.  Return True or False accordingly.
    """

    valid_value(call_point)

    global allow_shell_rc
    valid_integer(allow_shell_rc)

    # Convert to hex string for consistency in printout.
    allow_shell_rc = "0x%08x" % int(allow_shell_rc, 0)
    set_pgm_arg(allow_shell_rc)


def run_pgm(plug_in_dir_path, call_point, allow_shell_rc):
    r"""
    Run the call point program in the given plug_in_dir_path.  Return the following:
    rc                              The return code - 0 = PASS, 1 = FAIL.
    shell_rc                        The shell return code returned by process_plug_in_packages.py.
    failed_plug_in_name             The failed plug in name (if any).

    Description of arguments:
    plug_in_dir_path                The directory path where the call_point program may be located.
    call_point                      The call point (e.g. "setup").  This program will look for a program
                                    named "cp_" + call_point in the plug_in_dir_path.  If no such call point
                                    program is found, this function returns an rc of 0 (i.e. success).
    allow_shell_rc                  The user may supply a value other than zero to indicate an acceptable
                                    non-zero return code.  For example, if this value equals 0x00000200, it
                                    means that for each plug-in call point that runs, a 0x00000200 will not
                                    be counted as a failure.  See note above regarding left-shifting of
                                    return codes.
    """

    rc = 0
    failed_plug_in_name = ""
    shell_rc = 0x00000000

    plug_in_name = os.path.basename(os.path.normpath(plug_in_dir_path))
    cp_prefix = "cp_"
    plug_in_pgm_path = plug_in_dir_path + cp_prefix + call_point
    if not os.path.exists(plug_in_pgm_path):
        # No such call point in this plug in dir path.  This is legal so we return 0, etc.
        return rc, shell_rc, failed_plug_in_name

    print(
        "------------------------------------------------- Starting plug-"
        + "in -----------------------------------------------"
    )

    print_timen("Running " + plug_in_name + "/" + cp_prefix + call_point + ".")

    stdout = 1 - quiet
    if AUTOBOOT_OPENBMC_NICKNAME != "":
        auto_status_file_prefix = AUTOBOOT_OPENBMC_NICKNAME + "."
    else:
        auto_status_file_prefix = ""
    auto_status_file_prefix += plug_in_name + ".cp_" + call_point
    status_dir_path = add_trailing_slash(
        os.environ.get("STATUS_DIR_PATH", os.environ["HOME"] + "/status/")
    )
    if not os.path.isdir(status_dir_path):
        AUTOBOOT_EXECDIR = add_trailing_slash(
            os.environ.get("AUTOBOOT_EXECDIR", "")
        )
        status_dir_path = AUTOBOOT_EXECDIR + "logs/"
        if not os.path.exists(status_dir_path):
            os.makedirs(status_dir_path)
    status_file_name = (
        auto_status_file_prefix + "." + file_date_time_stamp() + ".status"
    )
    auto_status_file_subcmd = (
        "auto_status_file.py --status_dir_path="
        + status_dir_path
        + " --status_file_name="
        + status_file_name
        + " --quiet=1 --show_url=1 --prefix="
        + auto_status_file_prefix
        + " --stdout="
        + str(stdout)
        + " "
    )

    cmd_buf = "PATH=" + plug_in_dir_path.rstrip("/") + ":${PATH}"
    print_issuing(cmd_buf)
    os.environ["PATH"] = (
        plug_in_dir_path.rstrip("/") + os.pathsep + original_path
    )
    cmd_buf = auto_status_file_subcmd + cp_prefix + call_point
    print_issuing(cmd_buf)

    sub_proc = subprocess.Popen(cmd_buf, shell=True)
    sub_proc.communicate()
    shell_rc = sub_proc.returncode
    # Shift to left.
    shell_rc *= 0x100
    if shell_rc != 0 and shell_rc != allow_shell_rc:
        rc = 1
        failed_plug_in_name = plug_in_name + "/" + cp_prefix + call_point
    if shell_rc != 0:
        failed_plug_in_name = plug_in_name + "/" + cp_prefix + call_point
    if failed_plug_in_name != "" and not stdout:
        # Use tail to avoid double-printing of status_file_url.
        shell_cmd(
            "tail -n +2 " + status_dir_path + status_file_name,
            quiet=1,
            print_output=1,
        )

    print(
        "------------------------------------------------- Ending plug-in"
        + " -------------------------------------------------"
    )
    if failed_plug_in_name != "":
        print_var(failed_plug_in_name)
    print_var(shell_rc, hexa())

    return rc, shell_rc, failed_plug_in_name


def main():
    gen_setup()

    set_term_options(term_requests="children")

    # Access program parameter globals.
    global plug_in_dir_paths
    global mch_class
    global allow_shell_rc
    global stop_on_plug_in_failure
    global stop_on_non_zero_rc

    plug_in_packages_list = return_plug_in_packages_list(
        plug_in_dir_paths, mch_class
    )

    qprint_var(plug_in_packages_list)
    qprint("\n")

    allow_shell_rc = int(allow_shell_rc, 0)
    shell_rc = 0
    failed_plug_in_name = ""

    global AUTOBOOT_OPENBMC_NICKNAME
    AUTOBOOT_OPENBMC_NICKNAME = os.environ.get("AUTOBOOT_OPENBMC_NICKNAME", "")

    ret_code = 0
    for plug_in_dir_path in plug_in_packages_list:
        rc, shell_rc, failed_plug_in_name = run_pgm(
            plug_in_dir_path, call_point, allow_shell_rc
        )
        if rc != 0:
            ret_code = 1
            if stop_on_plug_in_failure:
                break
        if shell_rc != 0 and stop_on_non_zero_rc:
            qprint_time(
                "Stopping on non-zero shell return code as requested"
                + " by caller.\n"
            )
            break

    if ret_code != 0:
        print_error("At least one plug-in failed.\n")
        exit(1)


main()