1	#!/bin/bash
2
3	# TODO: Need a SETUP section.
4
5	### SETUP
6	a=(1 '2 3')
7
8	### "${a[@]}" and "${a[*]}"
9	a=(1 '2 3')
10	argv.py "${a[@]}" "${a[*]}"
11	# stdout: ['1', '2 3', '1 2 3']
12
13	### ${a[@]} and ${a[*]}
14	a=(1 '2 3')
15	argv.py ${a[@]} ${a[*]}
16	# stdout: ['1', '2', '3', '1', '2', '3']
17
18	### Empty array tests
19	argv.py 1 "${a[@]}" 2 ${a[@]} 3 "${a[*]}" 4 ${a[*]} 5
20	# stdout: ['1', '2', '3', '', '4', '5']
21
22	### local array
23	# mksh support local variables, but not local arrays, oddly.
24	f() {
25	local a=(1 '2 3')
26	argv.py "${a[0]}"
27	}
28	f
29	# stdout: ['1']
30	# status: 0
31	# BUG mksh status: 1
32	# BUG mksh stdout-json: ""
33
34	### Command with with word splitting in array
35	array=('1 2' $(echo '3 4'))
36	argv.py "${array[@]}"
37	# stdout: ['1 2', '3', '4']
38
39	### space before ( in array initialization
40	# NOTE: mksh accepts this, but bash doesn't
41	a= (1 '2 3')
42	echo $a
43	# status: 2
44	# OK mksh status: 0
45	# OK mksh stdout: 1
46
47	### empty array
48	empty=()
49	argv.py "${empty[@]}"
50	# stdout: []
51
52	### array with empty string
53	empty=('')
54	argv.py "${empty[@]}"
55	# stdout: ['']
56
57	### Assign to array index without initialization
58	b[2]=9
59	argv.py "${b[@]}"
60	# stdout: ['9']
61
62	### Retrieve index
63	a=(1 '2 3')
64	argv.py "${a[1]}"
65	# stdout: ['2 3']
66
67	### Retrieve out of bounds index
68	a=(1 '2 3')
69	argv.py "${a[3]}"
70	# stdout: ['']
71
72	### Retrieve index that is a variable
73	a=(1 '2 3')
74	i=1
75	argv.py "${a[$i]}"
76	# stdout: ['2 3']
77
78	### Retrieve index that is a variable without $
79	a=(1 '2 3')
80	i=5
81	argv.py "${a[i-4]}"
82	# stdout: ['2 3']
83
84	### Retrieve index that is a command sub
85	a=(1 '2 3')
86	argv.py "${a[$(echo 1)]}"
87	# stdout: ['2 3']
88
89	### Retrieve all indices with !
90	a=(1 '2 3')
91	argv.py "${!a[@]}"
92	# stdout: ['0', '1']
93
94	### Retrieve indices for one value
95	# Not really standardized between bash and mksh. Just doing whatever bash
96	# does.
97	a=(4 '2 3')
98	argv.py "${!a[1]}"
99	# status: 0
100	# stdout: ['']
101	# OK mksh stdout: ['1']
102
103	### Retrieve indices without []
104	# bash gives empty string?
105	# mksh gives the name of the variable with !. Very weird.
106	a=(1 '2 3')
107	argv.py "${!a}"
108	# stdout: ['']
109	# OK mksh stdout: ['a']
110
111	### All elements unquoted
112	a=(1 '2 3')
113	argv.py ${a[@]}
114	# stdout: ['1', '2', '3']
115
116	### All elements quoted
117	a=(1 '2 3')
118	argv.py "${a[@]}"
119	# stdout: ['1', '2 3']
120
121	### $*
122	a=(1 '2 3')
123	argv.py ${a[*]}
124	# stdout: ['1', '2', '3']
125
126	### "$*"
127	a=(1 '2 3')
128	argv.py "${a[*]}"
129	# stdout: ['1 2 3']
130
131	### Interpolate array into array
132	a=(1 '2 3')
133	a=(0 "${a[@]}" '4 5')
134	argv.py "${a[@]}"
135	# stdout: ['0', '1', '2 3', '4 5']
136
137	### Exporting array doesn't do anything, not even first element
138	# bash parses, but doesn't execute.
139	# mksh gives syntax error -- parses differently with 'export'
140	# osh no longer parses this statically.
141	export PYTHONPATH=(a b c)
142	export PYTHONPATH=a # NOTE: in bash, this doesn't work afterward!
143	printenv.py PYTHONPATH
144	# stdout: None
145	# OK mksh stdout-json: ""
146	# OK mksh status: 1
147	# OK osh stdout-json: ""
148	# OK osh status: 2
149
150	### Env with array
151	# Hm it treats it as a string!
152	A=a B=(b b) printenv.py A B
153	# stdout-json: "a\n(b b)\n"
154	# BUG mksh stdout-json: ""
155	# BUG mksh status: 1
156
157	### Set element
158	a=(1 '2 3')
159	a[0]=9
160	argv.py "${a[@]}"
161	# stdout: ['9', '2 3']
162
163	### Set element with var ref
164	a=(1 '2 3')
165	i=0
166	a[$i]=9
167	argv.py "${a[@]}"
168	# stdout: ['9', '2 3']
169
170	### Set element with array ref
171	# This makes parsing a little more complex. Anything can be inside [],
172	# including other [].
173	a=(1 '2 3')
174	i=(0 1)
175	a[${i[1]}]=9
176	argv.py "${a[@]}"
177	# stdout: ['1', '9']
178
179	### Slice of array with [@]
180	# mksh doesn't support this syntax! It's a bash extension.
181	a=(1 2 3)
182	argv.py "${a[@]:1:2}"
183	# stdout: ['2', '3']
184	# N-I mksh status: 1
185	# N-I mksh stdout-json: ""
186
187	### Negative slice
188	# mksh doesn't support this syntax! It's a bash extension.
189	# NOTE: for some reason -2) has to be in parens? Ah that's because it
190	# conflicts with :-! That's silly. You can also add a space.
191	a=(1 2 3)
192	argv.py "${a[@]:(-2):1}"
193	# stdout: ['2']
194	# N-I mksh status: 1
195	# N-I mksh stdout-json: ""
196
197	### Slice with arithmetic
198	a=(1 2 3)
199	i=5
200	argv.py "${a[@]:i-4:2}"
201	# stdout: ['2', '3']
202	# N-I mksh status: 1
203	# N-I mksh stdout-json: ""
204
205	### Number of elements
206	a=(1 '2 3')
207	echo "${#a[@]}"
208	# stdout: 2
209
210	### Length of an element
211	a=(1 '2 3')
212	echo "${#a[1]}"
213	# stdout: 3
214
215	### Iteration
216	a=(1 '2 3')
217	for v in "${a[@]}"; do
218	echo $v
219	done
220	# stdout-json: "1\n2 3\n"
221
222	### glob within array yields separate elements
223	touch _tmp/y.Y _tmp/yy.Y
224	a=(_tmp/*.Y)
225	argv.py "${a[@]}"
226	# stdout: ['_tmp/y.Y', '_tmp/yy.Y']
227
228	### declare array and then append
229	declare -a array
230	array+=(a)
231	array+=(b c)
232	argv.py "${array[@]}"
233	# stdout: ['a', 'b', 'c']
234
235	### Array syntax in wrong place
236	ls foo=(1 2)
237	# status: 2
238	# OK mksh status: 1
239
240	### Empty array with :-
241	empty=()
242	argv.py ${empty[@]:-not one} "${empty[@]:-not one}"
243	# stdout: ['not', 'one', 'not one']
244
245	### Single array with :-
246	# bash does EMPTY ELISION here, unless it's double quoted. mksh has
247	# more sane behavior. OSH is better.
248	single=('')
249	argv.py ${single[@]:-none} x "${single[@]:-none}"
250	# OK osh stdout: ['x', '']
251	# OK bash stdout: ['none', 'x', '']
252	# OK mksh stdout: ['none', 'x', 'none']
253
254	### Stripping a whole array unquoted
255	# Problem: it joins it first.
256	files=('foo.c' 'sp ace.h' 'bar.c')
257	argv.py ${files[@]%.c}
258	# stdout: ['foo', 'sp', 'ace.h', 'bar']
259	# N-I mksh stdout-json: ""
260
261	### Stripping a whole array quoted
262	files=('foo.c' 'sp ace.h' 'bar.c')
263	argv.py "${files[@]%.c}"
264	# stdout: ['foo', 'sp ace.h', 'bar']
265	# N-I mksh stdout-json: ""
266
267	### Multiple subscripts not allowed
268	a=('123' '456')
269	argv.py "${a[0]}" "${a[0][0]}"
270	# stdout-json: ""
271	# status: 2
272	# OK mksh status: 1
273	# bash is bad -- it IGNORES the bad subscript.
274	# BUG bash status: 0
275	# BUG bash stdout: ['123', '123']
276
277	### Length op, index op, then transform op is not allowed
278	a=('123' '456')
279	echo "${#a[0]}" "${#a[0]/1/xxx}"
280	# stdout-json: ""
281	# status: 2
282	# OK mksh status: 1
283	# bash is bad -- it IGNORES the op at the end
284	# BUG bash status: 0
285	# BUG bash stdout: 3 3
286
287	### Array subscript not allowed on string
288	s='abc'
289	echo ${s[@]}
290	# BUG bash/mksh status: 0
291	# BUG bash/mksh stdout: abc
292	# status: 1
293
294	### Create a "user" array out of the argv array
295	set -- 'a b' 'c'
296	array1=('x y' 'z')
297	array2=("$@")
298	argv.py "${array1[@]}" "${array2[@]}"
299	# stdout: ['x y', 'z', 'a b', 'c']
300
301	### Tilde expansion within array
302	HOME=/home/bob
303	a=(~/src ~/git)
304	echo "${a[@]}"
305	# stdout: /home/bob/src /home/bob/git
306
307	### Brace Expansion within Array
308	a=(-{a,b} {c,d}-)
309	echo "${a[@]}"
310	# stdout: -a -b c- d-
311
312	### array default
313	default=('1 2' '3')
314	argv.py "${undef[@]:-${default[@]}}"
315	# stdout: ['1 2', '3']
316