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