1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
<div class="hidden-warning"><a href="https://docs.haskellstack.org/"><img src="https://cdn.jsdelivr.net/gh/commercialhaskell/stack/doc/img/hidden-warning.svg"></a></div>
# The `stack query` command
:octicons-beaker-24: Experimental
[:octicons-tag-24: 0.1.6.0](https://github.com/commercialhaskell/stack/releases/tag/v0.1.6.0)
~~~text
stack query [SELECTOR...]
~~~
`stack query` outputs certain build information. For example, for a
multi-package project `multi` specifying snapshot `lts-19.25` (GHC 9.0.2) and
with two project packages, `my-package-A` (version 0.1.0.0) and `my-package-B`
(version 0.2.0.0), command `stack query` outputs:
~~~text
compiler:
actual: ghc-9.0.2
wanted: ghc-9.0.2
locals:
my-package-A:
path: <absolute_path_to>\multi\my-package-A\
version: 0.1.0.0
my-package-B:
path: <absolute_path_to>\multi\my-package-B\
version: 0.2.0.0
~~~
The component parts of the information can be specified using 'selectors' with
the command. In the example above the selectors include `compiler`,
`compiler actual`, `locals`, `locals my-package-A`, and
`locals my-package-A version`. For example, commanding:
~~~text
stack query locals my-package-B path
~~~
results in output:
~~~text
<absolute_path_to>\multi\my-package-B\
~~~
|
