1	#
2	# Tests for the blog.
3	#
4	# Fun game: try to come up with an expression that behaves differently on ALL
5	# FOUR shells.
6
7	#### ${##}
8	set -- $(seq 25)
9	echo ${##}
10	## stdout: 2
11
12	#### ${###}
13	set -- $(seq 25)
14	echo ${###}
15	## stdout: 25
16	## N-I osh stdout-json: ""
17	## N-I osh status: 2
18
19	#### ${####}
20	set -- $(seq 25)
21	echo ${####}
22	## stdout: 25
23	## N-I osh stdout-json: ""
24	## N-I osh status: 2
25
26	#### ${##2}
27	set -- $(seq 25)
28	echo ${##2}
29	## stdout: 5
30	## N-I osh stdout-json: ""
31	## N-I osh status: 2
32
33	#### ${###2}
34	set -- $(seq 25)
35	echo ${###2}
36	## stdout: 5
37	## BUG mksh stdout: 25
38	## N-I osh stdout-json: ""
39	## N-I osh status: 2
40
41	#### ${1####}
42	set -- '####'
43	echo ${1####}
44	## stdout: ##
45
46	#### ${1#'###'}
47	set -- '####'
48	echo ${1#'###'}
49	## stdout: #
50
51	#### ${#1#'###'}
52	set -- '####'
53	echo ${#1#'###'}
54	# dash and zsh accept; mksh/bash/osh don't.
55	## status: 2
56	## stdout-json: ""
57	## OK dash/zsh status: 0
58	## OK dash stdout: 4
59	## OK zsh stdout: 1
60	## N-I bash/mksh status: 1
61
62	#### Julia example from spec/oil-user-feedback
63
64	case $SH in (dash|mksh|zsh) exit ;; esac
65
66	git-branch-merged() {
67	cat <<EOF
68	foo
69	* bar
70	baz
71	master
72	EOF
73	}
74
75	shopt -s lastpipe # required for bash, not OSH
76
77	branches=() # dangerous when set -e is on
78	git-branch-merged | while read -r line; do
79	line=${line# *} # strip leading spaces
80	if [[ $line != 'master' && ! ${line:0:1} == '*' ]]; then
81	branches+=("$line")
82	fi
83	done
84
85	if [[ ${#branches[@]} -eq 0 ]]; then
86	echo "No merged branches"
87	else
88	echo git branch -D "${branches[@]}"
89	fi
90
91	## STDOUT:
92	git branch -D foo baz
93	## END
94	## N-I dash/mksh/zsh STDOUT:
95	## END