1	# Oil Blocks
2
3
4	#### cd with block
5	shopt -s oil:all
6	# OLDPWD is NOT defined
7	cd / { echo $PWD; echo OLDPWD=${OLDPWD:-} }; echo done
8	echo $(basename $PWD) # restored
9	cd /tmp {
10	write PWD=$PWD
11	write -sep ' ' pwd builtin: $(pwd)
12	}
13	echo $(basename $PWD) # restored
14	## STDOUT:
15	/
16	OLDPWD=
17	done
18	oil-blocks.test.sh
19	PWD=/tmp
20	pwd builtin: /tmp
21	oil-blocks.test.sh
22	## END
23
24	#### cd with block: fatal error in block
25	shopt -s oil:all
26	cd / {
27	echo one
28	false
29	echo two
30	}
31	## status: 1
32	## STDOUT:
33	one
34	## END
35
36
37	#### cd with block: return in block
38	shopt -s oil:all
39	f() {
40	cd / {
41	echo one
42	return
43	echo two
44	}
45	echo 'end func'
46	}
47	f
48	## STDOUT:
49	one
50	end func
51	## END
52
53	#### cd with block: break in block
54	shopt -s oil:all
55	f() {
56	cd / {
57	echo one
58	for i in 1 2; do
59	echo $i
60	break # break out of loop
61	done
62
63	break # break out of block isn't valid
64	echo two
65	}
66	echo end func
67	}
68	f
69	## status: 1
70	## STDOUT:
71	one
72	1
73	## END
74
75	#### cd with block exits with status 0
76	shopt -s oil:all
77	cd / {
78	echo block
79
80	# This return value is ignored.
81	# Or maybe this should be a runtime error?
82	return 1
83	}
84	echo status=$?
85	## STDOUT:
86	block
87	status=0
88	## END
89
90	#### block doesn't have its own scope
91	shopt -s oil:all
92	var x = 1
93	echo "x=$x"
94	cd / {
95	#set y = 5 # This would be an error because set doesn't do dynamic lookup
96	var x = 42
97	echo "x=$x"
98	}
99	echo "x=$x"
100	## STDOUT:
101	x=1
102	x=42
103	x=42
104	## END
105
106	#### block literal in expression mode: ^(echo $PWD)
107	shopt -s oil:all
108
109	const myblock = ^(echo $PWD | wc -l)
110	const b2 = ^(echo one; echo two)
111	= myblock
112	= b2
113
114	# TODO:
115	# Implement something like this?
116	# _ evalexpr(b2, binding_dict) # e.g. to bind to QTSV fields
117	# _ evalblock(b2, binding_dict)
118
119	## STDOUT:
120	one
121	two
122	## END
123
124	#### 'builtin' and 'command' with block
125	shopt --set oil:basic
126	builtin cd / {
127	echo "builtin $PWD"
128	}
129	command cd / {
130	echo "command $PWD"
131	}
132	## STDOUT:
133	builtin /
134	command /
135	## END