-
Notifications
You must be signed in to change notification settings - Fork 2
Expand file tree
/
Copy pathargparse.bash
More file actions
executable file
·83 lines (69 loc) · 2.22 KB
/
argparse.bash
File metadata and controls
executable file
·83 lines (69 loc) · 2.22 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
#!/usr/bin/env bash
# Use python's argparse module in shell scripts
#
# The function `argparse` parses its arguments using
# argparse.ArgumentParser; the parser is defined in the function's
# stdin.
#
# Executing ``argparse.bash`` (as opposed to sourcing it) prints a
# script template.
#
# https://github.com/nhoffman/argparse-bash
# MIT License - Copyright (c) 2015 Noah Hoffman
argparse(){
argparser=$(mktemp 2>/dev/null || mktemp -t argparser)
cat > "$argparser" <<EOF
from __future__ import print_function
import sys
import argparse
import os
class MyArgumentParser(argparse.ArgumentParser):
def print_help(self, file=None):
"""Print help and exit with error"""
super(MyArgumentParser, self).print_help(file=file)
sys.exit(1)
parser = MyArgumentParser(prog=os.path.basename("$0"),
# preserve newlines in description
formatter_class=argparse.RawDescriptionHelpFormatter,
description="""$ARGPARSE_DESCRIPTION""")
EOF
# stdin to this function should contain the parser definition
cat >> "$argparser"
cat >> "$argparser" <<EOF
args = parser.parse_args()
for arg in [a for a in dir(args) if not a.startswith('_')]:
key = arg.upper()
value = getattr(args, arg, None)
if isinstance(value, bool) or value is None:
print('{0}="{1}";'.format(key, 'yes' if value else ''))
elif isinstance(value, list):
print('{0}=({1});'.format(key, ' '.join('"{0}"'.format(s) for s in value)))
else:
print('{0}="{1}";'.format(key, value))
EOF
# Define variables corresponding to the options if the args can be
# parsed without errors; otherwise, print the text of the error
# message.
if python "$argparser" "$@" &> /dev/null; then
eval $(python "$argparser" "$@")
retval=0
else
python "$argparser" "$@"
retval=1
fi
rm "$argparser"
return $retval
}
# print a script template when this script is executed
if [[ $0 == *argparse.bash ]]; then
cat <<FOO
#!/usr/bin/env bash
source \$(dirname \$0)/argparse.bash || exit 1
argparse "\$@" <<EOF || exit 1
parser.add_argument('infile')
parser.add_argument('-o', '--outfile')
EOF
echo "INFILE: \${INFILE}"
echo "OUTFILE: \${OUTFILE}"
FOO
fi