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[@]} ${a[*]}
16	# stdout: ['1', '2', '3', '1', '2', '3']
17
18	### local array
19	# mksh support local variables, but not local arrays, oddly.
20	f() {
21	local a=(1 '2 3')
22	argv.py "${a[0]}"
23	}
24	f
25	# stdout: ['1']
26	# status: 0
27	# BUG mksh status: 1
28	# BUG mksh stdout-json: ""
29
30	### Command with with word splitting in array
31	array=('1 2' $(echo '3 4'))
32	argv.py "${array[@]}"
33	# stdout: ['1 2', '3', '4']
34
35	### space before ( in array initialization
36	# NOTE: mksh accepts this, but bash doesn't
37	a= (1 '2 3')
38	echo $a
39	# status: 2
40	# OK mksh status: 0
41	# OK mksh stdout: 1
42
43	### empty array
44	empty=()
45	argv.py "${empty[@]}"
46	# stdout: []
47
48	### array with empty string
49	empty=('')
50	argv.py "${empty[@]}"
51	# stdout: ['']
52
53	### Assign to array index without initialization
54	b[2]=9
55	argv.py "${b[@]}"
56	# stdout: ['9']
57
58	### Retrieve index
59	a=(1 '2 3')
60	argv.py "${a[1]}"
61	# stdout: ['2 3']
62
63	### Retrieve out of bounds index
64	a=(1 '2 3')
65	argv.py "${a[3]}"
66	# stdout: ['']
67
68	### Retrieve index that is a variable
69	a=(1 '2 3')
70	i=1
71	argv.py "${a[$i]}"
72	# stdout: ['2 3']
73
74	### Retrieve index that is a variable without $
75	a=(1 '2 3')
76	i=5
77	argv.py "${a[i-4]}"
78	# stdout: ['2 3']
79
80	### Retrieve index that is a command sub
81	a=(1 '2 3')
82	argv.py "${a[$(echo 1)]}"
83	# stdout: ['2 3']
84
85	### Retrieve all indices with !
86	a=(1 '2 3')
87	argv.py "${!a[@]}"
88	# stdout: ['0', '1']
89
90	### Retrieve indices for one value
91	# Not really standardized between bash and mksh. Just doing whatever bash
92	# does.
93	a=(4 '2 3')
94	argv.py "${!a[1]}"
95	# status: 0
96	# stdout: ['']
97	# OK mksh stdout: ['1']
98
99	### Retrieve indices without []
100	# bash gives empty string?
101	# mksh gives the name of the variable with !. Very weird.
102	a=(1 '2 3')
103	argv.py "${!a}"
104	# stdout: ['']
105	# OK mksh stdout: ['a']
106
107	### All elements unquoted
108	a=(1 '2 3')
109	argv.py ${a[@]}
110	# stdout: ['1', '2', '3']
111
112	### All elements quoted
113	a=(1 '2 3')
114	argv.py "${a[@]}"
115	# stdout: ['1', '2 3']
116
117	### $*
118	a=(1 '2 3')
119	argv.py ${a[*]}
120	# stdout: ['1', '2', '3']
121
122	### "$*"
123	a=(1 '2 3')
124	argv.py "${a[*]}"
125	# stdout: ['1 2 3']
126
127	### Interpolate array into array
128	a=(1 '2 3')
129	a=(0 "${a[@]}" '4 5')
130	argv.py "${a[@]}"
131	# stdout: ['0', '1', '2 3', '4 5']
132
133	### Exporting array doesn't do anything, not even first element
134	# bash parses, but doesn't execute.
135	# mksh gives syntax error -- parses differently with 'export'
136	export PYTHONPATH=(a b c)
137	export PYTHONPATH=a # NOTE: in bash, this doesn't work afterward!
138	printenv.py PYTHONPATH
139	# stdout: None
140	# BUG mksh stdout-json: ""
141	# BUG mksh status: 1
142
143	### Env with array
144	# Hm it treats it as a string!
145	A=a B=(b b) printenv.py A B
146	# stdout-json: "a\n(b b)\n"
147	# BUG mksh stdout-json: ""
148	# BUG mksh status: 1
149
150	### Set element
151	a=(1 '2 3')
152	a[0]=9
153	argv.py "${a[@]}"
154	# stdout: ['9', '2 3']
155
156	### Set element with var ref
157	a=(1 '2 3')
158	i=0
159	a[$i]=9
160	argv.py "${a[@]}"
161	# stdout: ['9', '2 3']
162
163	### Set element with array ref
164	# This makes parsing a little more complex. Anything can be inside [],
165	# including other [].
166	a=(1 '2 3')
167	i=(0 1)
168	a[${i[1]}]=9
169	argv.py "${a[@]}"
170	# stdout: ['1', '9']
171
172	### Slice of array with [@]
173	# mksh doesn't support this syntax! It's a bash extension.
174	a=(1 2 3)
175	argv.py "${a[@]:1:2}"
176	# stdout: ['2', '3']
177	# N-I mksh status: 1
178	# N-I mksh stdout-json: ""
179
180	### Negative slice
181	# mksh doesn't support this syntax! It's a bash extension.
182	# NOTE: for some reason -2) has to be in parens? Ah that's because it
183	# conflicts with :-! That's silly. You can also add a space.
184	a=(1 2 3)
185	argv.py "${a[@]:(-2):1}"
186	# stdout: ['2']
187	# N-I mksh status: 1
188	# N-I mksh stdout-json: ""
189
190	### Slice with arithmetic
191	a=(1 2 3)
192	i=5
193	argv.py "${a[@]:i-4:2}"
194	# stdout: ['2', '3']
195	# N-I mksh status: 1
196	# N-I mksh stdout-json: ""
197
198	### Number of elements
199	a=(1 '2 3')
200	echo "${#a[@]}"
201	# stdout: 2
202
203	### Length of an element
204	a=(1 '2 3')
205	echo "${#a[1]}"
206	# stdout: 3
207
208	### Iteration
209	a=(1 '2 3')
210	for v in "${a[@]}"; do
211	echo $v
212	done
213	# stdout-json: "1\n2 3\n"
214
215	### glob within array yields separate elements
216	touch _tmp/y.Y _tmp/yy.Y
217	a=(_tmp/*.Y)
218	argv.py "${a[@]}"
219	# stdout: ['_tmp/y.Y', '_tmp/yy.Y']
220
221	### declare array and then append
222	declare -a array
223	array+=(a)
224	array+=(b c)
225	argv.py "${array[@]}"
226	# stdout: ['a', 'b', 'c']
227
228	### Array syntax in wrong place
229	ls foo=(1 2)
230	# status: 2
231	# OK mksh status: 1
232
233	### Empty array with :-
234	empty=()
235	argv.py ${empty[@]:-not one} "${empty[@]:-not one}"
236	# stdout: ['not', 'one', 'not one']
237
238	### Single array with :-
239	# bash does EMPTY ELISION here, unless it's double quoted. mksh has
240	# more sane behavior. OSH is better.
241	single=('')
242	argv.py ${single[@]:-none} x "${single[@]:-none}"
243	# OK osh stdout: ['x', '']
244	# OK bash stdout: ['none', 'x', '']
245	# OK mksh stdout: ['none', 'x', 'none']
246
247	### Stripping a whole array unquoted
248	# Problem: it joins it first.
249	files=('foo.c' 'sp ace.h' 'bar.c')
250	argv.py ${files[@]%.c}
251	# stdout: ['foo', 'sp', 'ace.h', 'bar']
252	# N-I mksh stdout-json: ""
253
254	### Stripping a whole array quoted
255	files=('foo.c' 'sp ace.h' 'bar.c')
256	argv.py "${files[@]%.c}"
257	# stdout: ['foo', 'sp ace.h', 'bar']
258	# N-I mksh stdout-json: ""
259
260	### Multiple subscripts not allowed
261	a=('123' '456')
262	argv.py "${a[0]}" "${a[0][0]}"
263	# stdout-json: ""
264	# status: 2
265	# OK mksh status: 1
266	# bash is bad -- it IGNORES the bad subscript.
267	# BUG bash status: 0
268	# BUG bash stdout: ['123', '123']
269
270	### Length op, index op, then transform op is not allowed
271	a=('123' '456')
272	echo "${#a[0]}" "${#a[0]/1/xxx}"
273	# stdout-json: ""
274	# status: 2
275	# OK mksh status: 1
276	# bash is bad -- it IGNORES the op at the end
277	# BUG bash status: 0
278	# BUG bash stdout: 3 3
279
280	### Array subscript not allowed on string
281	s='abc'
282	echo ${s[@]}
283	# BUG bash/mksh status: 0
284	# BUG bash/mksh stdout: abc
285	# status: 1
286
287	### Create a "user" array out of the argv array
288	set -- 'a b' 'c'
289	array1=('x y' 'z')
290	array2=("$@")
291	argv.py "${array1[@]}" "${array2[@]}"
292	# stdout: ['x y', 'z', 'a b', 'c']
293
294	### Tilde expansion within array
295	HOME=/home/bob
296	a=(~/src ~/git)
297	echo "${a[@]}"
298	# stdout: /home/bob/src /home/bob/git
299
300	### Brace Expansion within Array
301	a=(-{a,b} {c,d}-)
302	echo "${a[@]}"
303	# stdout: -a -b c- d-
304
305	### array default
306	default=('1 2' '3')
307	argv.py "${undef[@]:-${default[@]}}"
308	# stdout: ['1 2', '3']
309