1
2	#### try builtin
3	shopt --set errexit strict_errexit
4
5	myproc() {
6	echo hi
7	false
8	echo bye
9	}
10
11	case $SH in
12	(*osh)
13	# new semantics: the function aborts at 'false', the 'catch' builtin exits
14	# with code 1, and we echo 'failed'
15	try myproc || echo "failed"
16	;;
17	(*)
18	myproc || echo "failed"
19	;;
20	esac
21
22	## STDOUT:
23	hi
24	failed
25	## END
26	## N-I dash/bash/mksh/ash STDOUT:
27	hi
28	bye
29	## END
30
31	#### try with !
32	shopt -s oil:all || true
33
34	deploy() {
35	echo 'one'
36	false
37	echo 'two'
38	}
39
40	#if ! deploy; then
41	# echo 'failed'
42	#fi
43
44	if ! try deploy; then
45	echo 'failed'
46	fi
47	echo done
48
49	## STDOUT:
50	one
51	failed
52	done
53	## END
54
55	#### try -allow-status-01 with external command
56
57	set -o errexit
58
59	echo hi > file.txt
60
61	if try --allow-status-01 -- grep pat file.txt; then
62	echo 'match'
63	else
64	echo 'no match'
65	fi
66
67	if try --allow-status-01 -- grep pat BAD; then
68	echo 'match'
69	else
70	echo 'no match'
71	fi
72
73	echo DONE
74	## status: 2
75	## STDOUT:
76	no match
77	## END
78
79	#### try -allow-status-01 with function
80
81	set -o errexit
82
83	echo hi > file.txt
84
85	myproc() {
86	echo ---
87	grep pat BAD # exits with code 2
88	#grep pat file.txt
89	echo ---
90	}
91
92	#myproc
93
94	if try --allow-status-01 -- myproc; then
95	echo 'match'
96	else
97	echo 'no match'
98	fi
99
100	## status: 2
101	## STDOUT:
102	---
103	## END
104
105	#### try syntax error
106	set -o errexit
107
108	# Irony: we can't fail that hard here because errexit is disabled before
109	# we enable it.
110	# TODO: We could special case this perhaps
111
112	if try; then
113	echo hi
114	else
115	echo fail
116	fi
117
118	## status: 2
119	## STDOUT:
120	## END
121
122	#### try --assign
123	set -o errexit
124
125	myproc() {
126	return 42
127	}
128
129	try --assign st -- myproc
130	echo st=$st
131
132	# colon
133	try --assign :st -- myproc
134	echo st=$st
135
136
137	## STDOUT:
138	st=42
139	st=42
140	## END