Source code for xonsh.completers.bash
import os
import shlex
import pathlib
import builtins
import subprocess
import xonsh.platform as xp
from xonsh.completers.path import _quote_paths
BASH_COMPLETE_SCRIPT = r"""
{source}
# Override some functions in bash-completion, do not quote for readline
quote_readline()
{{
echo "$1"
}}
_quote_readline_by_ref()
{{
if [[ $1 == \'* ]]; then
# Leave out first character
printf -v $2 %s "${{1:1}}"
else
printf -v $2 %s "$1"
fi
[[ ${{!2}} == \$* ]] && eval $2=${{!2}}
}}
function _get_complete_statement {{
complete -p {cmd} 2> /dev/null || echo "-F _minimal"
}}
_complete_stmt=$(_get_complete_statement)
if echo "$_complete_stmt" | grep --quiet -e "_minimal"
then
declare -f _completion_loader > /dev/null && _completion_loader {cmd}
_complete_stmt=$(_get_complete_statement)
fi
_func=$(echo "$_complete_stmt" | grep -o -e '-F \w\+' | cut -d ' ' -f 2)
declare -f "$_func" > /dev/null || exit 1
echo "$_complete_stmt"
COMP_WORDS=({line})
COMP_LINE={comp_line}
COMP_POINT=${{#COMP_LINE}}
COMP_COUNT={end}
COMP_CWORD={n}
$_func {cmd} {prefix} {prev}
for ((i=0;i<${{#COMPREPLY[*]}};i++)) do echo ${{COMPREPLY[i]}}; done
"""
[docs]def complete_from_bash(prefix, line, begidx, endidx, ctx):
"""Completes based on results from BASH completion."""
source = _get_completions_source()
if not source:
return set()
if prefix.startswith('$'): # do not complete env variables
return set()
splt = line.split()
cmd = splt[0]
idx = n = 0
prev = ''
for n, tok in enumerate(splt):
if tok == prefix:
idx = line.find(prefix, idx)
if idx >= begidx:
break
prev = tok
if len(prefix) == 0:
prefix_quoted = '""'
n += 1
else:
prefix_quoted = shlex.quote(prefix)
script = BASH_COMPLETE_SCRIPT.format(
source=source, line=' '.join(shlex.quote(p) for p in splt),
comp_line=shlex.quote(line), n=n, cmd=shlex.quote(cmd),
end=endidx + 1, prefix=prefix_quoted, prev=shlex.quote(prev),
)
try:
out = subprocess.check_output(
[xp.bash_command(), '-c', script], universal_newlines=True,
stderr=subprocess.PIPE, env=builtins.__xonsh_env__.detype())
except (subprocess.CalledProcessError, FileNotFoundError,
UnicodeDecodeError):
return set()
out = out.splitlines()
complete_stmt = out[0]
out = set(out[1:])
# From GNU Bash document: The results of the expansion are prefix-matched
# against the word being completed
commprefix = os.path.commonprefix(list(out))
strip_len = 0
while strip_len < len(prefix):
if commprefix.startswith(prefix[strip_len:]):
break
strip_len += 1
if '-o noquote' not in complete_stmt:
out = _quote_paths(out, '', '')
if '-o nospace' in complete_stmt:
out = set([x.rstrip() for x in out])
return out, len(prefix) - strip_len
def _get_completions_source():
completers = builtins.__xonsh_env__.get('BASH_COMPLETIONS', ())
for path in map(pathlib.Path, completers):
if path.is_file():
return 'source "{}"'.format(path.as_posix())
return None