1	#!/bin/bash
2
3	# TODO: Need a SETUP section.
4
5	### SETUP
6	a=(1 '2 3')
7
8	### $a gives first element of array
9	a=(1 '2 3')
10	echo $a
11	# stdout: 1
12
13	### "${a[@]}" and "${a[*]}"
14	a=(1 '2 3')
15	argv.py "${a[@]}" "${a[*]}"
16	# stdout: ['1', '2 3', '1 2 3']
17
18	### ${a[@]} and ${a[*]}
19	a=(1 '2 3')
20	argv.py ${a[@]} ${a[*]}
21	# stdout: ['1', '2', '3', '1', '2', '3']
22
23	### local array
24	# mksh support local variables, but not local arrays, oddly.
25	f() {
26	local a=(1 '2 3')
27	argv.py "${a[0]}"
28	}
29	f
30	# stdout: ['1']
31	# status: 0
32	# BUG mksh status: 1
33	# BUG mksh stdout-json: ""
34
35	### Command with with word splitting in array
36	array=('1 2' $(echo '3 4'))
37	argv.py "${array[@]}"
38	# stdout: ['1 2', '3', '4']
39
40	### space before ( in array initialization
41	# NOTE: mksh accepts this, but bash doesn't
42	a= (1 '2 3')
43	echo $a
44	# status: 2
45	# OK mksh status: 0
46	# OK mksh stdout: 1
47
48	### empty array
49	empty=()
50	argv.py "${empty[@]}"
51	# stdout: []
52
53	### array with empty string
54	empty=('')
55	argv.py "${empty[@]}"
56	# stdout: ['']
57
58	### Assign to array index without initialization
59	b[2]=9
60	argv.py "${b[@]}"
61	# stdout: ['9']
62
63	### Retrieve index
64	a=(1 '2 3')
65	argv.py "${a[1]}"
66	# stdout: ['2 3']
67
68	### Retrieve out of bounds index
69	a=(1 '2 3')
70	argv.py "${a[3]}"
71	# stdout: ['']
72
73	### Retrieve index that is a variable
74	a=(1 '2 3')
75	i=1
76	argv.py "${a[$i]}"
77	# stdout: ['2 3']
78
79	### Retrieve index that is a variable without $
80	a=(1 '2 3')
81	i=5
82	argv.py "${a[i-4]}"
83	# stdout: ['2 3']
84
85	### Retrieve index that is a command sub
86	a=(1 '2 3')
87	argv.py "${a[$(echo 1)]}"
88	# stdout: ['2 3']
89
90	### Retrieve all indices with !
91	a=(1 '2 3')
92	argv.py "${!a[@]}"
93	# stdout: ['0', '1']
94
95	### Retrieve indices for one value
96	# Not really standardized between bash and mksh. Just doing whatever bash
97	# does.
98	a=(4 '2 3')
99	argv.py "${!a[1]}"
100	# status: 0
101	# stdout: ['']
102	# OK mksh stdout: ['1']
103
104	### Retrieve indices without []
105	# bash gives empty string?
106	# mksh gives the name of the variable with !. Very weird.
107	a=(1 '2 3')
108	argv.py "${!a}"
109	# stdout: ['']
110	# OK mksh stdout: ['a']
111
112	### All elements unquoted
113	a=(1 '2 3')
114	argv.py ${a[@]}
115	# stdout: ['1', '2', '3']
116
117	### All elements quoted
118	a=(1 '2 3')
119	argv.py "${a[@]}"
120	# stdout: ['1', '2 3']
121
122	### $*
123	a=(1 '2 3')
124	argv.py ${a[*]}
125	# stdout: ['1', '2', '3']
126
127	### "$*"
128	a=(1 '2 3')
129	argv.py "${a[*]}"
130	# stdout: ['1 2 3']
131
132	### Interpolate array into array
133	a=(1 '2 3')
134	a=(0 "${a[@]}" '4 5')
135	argv.py "${a[@]}"
136	# stdout: ['0', '1', '2 3', '4 5']
137
138	### Arrays can't be copied directly
139	declare -a a b
140	a=(x y z)
141	b="${a[@]}" # this collapses to a string
142	c=("${a[@]}") # this preserves the array
143	c[1]=YYY # mutate a copy -- doesn't affect the original
144	argv.py "${a[@]}" "${b[@]}" "${c[@]}"
145	# stdout: ['x', 'y', 'z', 'x y z', 'x', 'YYY', 'z']
146
147	### Exporting array doesn't do anything, not even first element
148	# bash parses, but doesn't execute.
149	# mksh gives syntax error -- parses differently with 'export'
150	export PYTHONPATH=(a b c)
151	export PYTHONPATH=a # NOTE: in bash, this doesn't work afterward!
152	printenv.py PYTHONPATH
153	# stdout: None
154	# BUG mksh stdout-json: ""
155	# BUG mksh status: 1
156
157	### Env with array
158	# Hm it treats it as a string!
159	A=a B=(b b) printenv.py A B
160	# stdout-json: "a\n(b b)\n"
161	# BUG mksh stdout-json: ""
162	# BUG mksh status: 1
163
164	### Set element
165	a=(1 '2 3')
166	a[0]=9
167	argv.py "${a[@]}"
168	# stdout: ['9', '2 3']
169
170	### Set element with var ref
171	a=(1 '2 3')
172	i=0
173	a[$i]=9
174	argv.py "${a[@]}"
175	# stdout: ['9', '2 3']
176
177	### Set element with array ref
178	# This makes parsing a little more complex. Anything can be inside [],
179	# including other [].
180	a=(1 '2 3')
181	i=(0 1)
182	a[${i[1]}]=9
183	argv.py "${a[@]}"
184	# stdout: ['1', '9']
185
186	### Slice of array with [@]
187	# mksh doesn't support this syntax! It's a bash extension.
188	a=(1 2 3)
189	argv.py "${a[@]:1:2}"
190	# stdout: ['2', '3']
191	# N-I mksh status: 1
192	# N-I mksh stdout-json: ""
193
194	### Negative slice
195	# mksh doesn't support this syntax! It's a bash extension.
196	# NOTE: for some reason -2) has to be in parens? Ah that's because it
197	# conflicts with :-! That's silly. You can also add a space.
198	a=(1 2 3)
199	argv.py "${a[@]:(-2):1}"
200	# stdout: ['2']
201	# N-I mksh status: 1
202	# N-I mksh stdout-json: ""
203
204	### Slice with arithmetic
205	a=(1 2 3)
206	i=5
207	argv.py "${a[@]:i-4:2}"
208	# stdout: ['2', '3']
209	# N-I mksh status: 1
210	# N-I mksh stdout-json: ""
211
212	### Number of elements
213	a=(1 '2 3')
214	echo "${#a[@]}"
215	# stdout: 2
216
217	### Iteration
218	a=(1 '2 3')
219	for v in "${a[@]}"; do
220	echo $v
221	done
222	# stdout-json: "1\n2 3\n"
223
224	### glob within array yields separate elements
225	touch _tmp/y.Y _tmp/yy.Y
226	a=(_tmp/*.Y)
227	argv.py "${a[@]}"
228	# stdout: ['_tmp/y.Y', '_tmp/yy.Y']
229
230	### declare array and then append
231	declare -a array
232	array+=(a)
233	array+=(b c)
234	argv.py "${array[@]}"
235	# stdout: ['a', 'b', 'c']
236
237	### Array syntax in wrong place
238	ls foo=(1 2)
239	# status: 2
240	# OK mksh status: 1
241
242	### Empty array with :-
243	empty=()
244	argv.py ${empty[@]:-not one} "${empty[@]:-not one}"
245	# stdout: ['not', 'one', 'not one']
246
247	### Single array with :-
248	# bash does EMPTY ELISION here, unless it's double quoted. Looks like mksh has
249	# the sane behavior.
250	single=('')
251	argv.py ${single[@]:-none} "${single[@]:-none}"
252	# stdout: ['none', '']
253	# OK mksh stdout: ['none', 'none']
254
255	### Stripping a whole array
256	files=('foo.c' 'sp ace.h' 'bar.c')
257	argv.py ${files[@]%.c} "${files[@]%.c}"
258	# stdout: ['foo', 'sp', 'ace.h', 'bar', 'foo', 'sp ace.h', 'bar']
259	# N-I mksh stdout-json: ""
260
261	### Multiple subscripts not allowed
262	a=('123' '456')
263	argv.py "${a[0]}" "${a[0][0]}"
264	# stdout-json: ""
265	# status: 2
266	# OK mksh status: 1
267	# bash is bad -- it IGNORES the bad subscript.
268	# BUG bash status: 0
269	# BUG bash stdout: ['123', '123']
270
271	### Length op, index op, then transform op is not allowed
272	a=('123' '456')
273	echo "${#a[0]}" "${#a[0]/1/xxx}"
274	# stdout-json: ""
275	# status: 2
276	# OK mksh status: 1
277	# bash is bad -- it IGNORES the op at the end
278	# BUG bash status: 0
279	# BUG bash stdout: 3 3
280
281	### Array subscript not allowed on string
282	s='abc'
283	echo ${s[@]}
284	# BUG bash/mksh status: 0
285	# BUG bash/mksh stdout: abc
286	# status: 1
287
288	### Create a "user" array out of the argv array
289	set -- 'a b' 'c'
290	array1=('x y' 'z')
291	array2=("$@")
292	array3="$@" # Without splicing with (), this one is flattened
293	argv.py "${array1[@]}" "${array2[@]}" "${array3[@]}"
294	# stdout: ['x y', 'z', 'a b', 'c', 'a b c']
295
296	### Tilde expansion within array
297	HOME=/home/bob
298	a=(~/src ~/git)
299	echo "${a[@]}"
300	# stdout: /home/bob/src /home/bob/git
301
302	### Brace Expansion within Array
303	a=(-{a,b} {c,d}-)
304	echo "${a[@]}"
305	# stdout: -a -b c- d-
306
307	### array default
308	default=('1 2' '3')
309	argv.py "${undef[@]:-${default[@]}}"
310	# stdout: ['1 2', '3']
311