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import sys
import textwrap
from optparse import Values
from typing import List
from pip._internal.cli.base_command import Command
from pip._internal.cli.status_codes import SUCCESS
from pip._internal.utils.misc import get_prog
BASE_COMPLETION = """
# pip {shell} completion start{script}# pip {shell} completion end
"""
COMPLETION_SCRIPTS = {
"bash": """
_pip_completion()
{{
COMPREPLY=( $( COMP_WORDS="${{COMP_WORDS[*]}}" \\
COMP_CWORD=$COMP_CWORD \\
PIP_AUTO_COMPLETE=1 $1 2>/dev/null ) )
}}
complete -o default -F _pip_completion {prog}
""",
"zsh": """
function _pip_completion {{
local words cword
read -Ac words
read -cn cword
reply=( $( COMP_WORDS="$words[*]" \\
COMP_CWORD=$(( cword-1 )) \\
PIP_AUTO_COMPLETE=1 $words[1] 2>/dev/null ))
}}
compctl -K _pip_completion {prog}
""",
"fish": """
function __fish_complete_pip
set -lx COMP_WORDS (commandline -o) ""
set -lx COMP_CWORD ( \\
math (contains -i -- (commandline -t) $COMP_WORDS)-1 \\
)
set -lx PIP_AUTO_COMPLETE 1
string split \\ -- (eval $COMP_WORDS[1])
end
complete -fa "(__fish_complete_pip)" -c {prog}
""",
"powershell": """
if ((Test-Path Function:\\TabExpansion) -and -not `
(Test-Path Function:\\_pip_completeBackup)) {{
Rename-Item Function:\\TabExpansion _pip_completeBackup
}}
function TabExpansion($line, $lastWord) {{
$lastBlock = [regex]::Split($line, '[|;]')[-1].TrimStart()
if ($lastBlock.StartsWith("{prog} ")) {{
$Env:COMP_WORDS=$lastBlock
$Env:COMP_CWORD=$lastBlock.Split().Length - 1
$Env:PIP_AUTO_COMPLETE=1
(& {prog}).Split()
Remove-Item Env:COMP_WORDS
Remove-Item Env:COMP_CWORD
Remove-Item Env:PIP_AUTO_COMPLETE
}}
elseif (Test-Path Function:\\_pip_completeBackup) {{
# Fall back on existing tab expansion
_pip_completeBackup $line $lastWord
}}
}}
""",
}
class CompletionCommand(Command):
"""A helper command to be used for command completion."""
ignore_require_venv = True
def add_options(self) -> None:
self.cmd_opts.add_option(
"--bash",
"-b",
action="store_const",
const="bash",
dest="shell",
help="Emit completion code for bash",
)
self.cmd_opts.add_option(
"--zsh",
"-z",
action="store_const",
const="zsh",
dest="shell",
help="Emit completion code for zsh",
)
self.cmd_opts.add_option(
"--fish",
"-f",
action="store_const",
const="fish",
dest="shell",
help="Emit completion code for fish",
)
self.cmd_opts.add_option(
"--powershell",
"-p",
action="store_const",
const="powershell",
dest="shell",
help="Emit completion code for powershell",
)
self.parser.insert_option_group(0, self.cmd_opts)
def run(self, options: Values, args: List[str]) -> int:
"""Prints the completion code of the given shell"""
shells = COMPLETION_SCRIPTS.keys()
shell_options = ["--" + shell for shell in sorted(shells)]
if options.shell in shells:
script = textwrap.dedent(
COMPLETION_SCRIPTS.get(options.shell, "").format(prog=get_prog())
)
print(BASE_COMPLETION.format(script=script, shell=options.shell))
return SUCCESS
else:
sys.stderr.write(
"ERROR: You must pass {}\n".format(" or ".join(shell_options))
)
return SUCCESS
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