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Showing content from http://docs.haskellstack.org/en/stable/commands/ls_command/ below:

ls - Stack

The stack ls commands¶

stack ls COMMAND

Available commands:
  dependencies             View the dependencies
  globals                  View global packages
  snapshots                View snapshots (local by default)
  stack-colors             View Stack's output styles
  stack-colours            View Stack's output styles (alias for 'stack-colors')
  tools                    View Stack's installed tools

The stack ls commands list different types of information. Command stack ls for the available commands.

The stack ls dependencies command¶

Either

stack ls dependencies COMMAND

Available commands:
  cabal                    Print dependencies as exact Cabal constraints
  json                     Print dependencies as JSON
  text                     Print dependencies as text (default)
  tree                     Print dependencies as tree

stack ls dependencies [--[no-]license] [--separator SEP] [--filter ITEM]
                      [--[no-]external] [--[no-]include-base] [--depth DEPTH]
                      [--prune PACKAGES] [TARGET] [--flag PACKAGE:[-]FLAG]
                      [--test] [--bench] [--global-hints]

stack ls dependencies lists package versions used for a project.

By default:

with the text or tree subcommand (see below), the package name is followed by its version. Pass the --license flag to follow the package name with its licence. (Consistent with the Cabal package description format specification, only the American English spelling (license) is accepted.)
With the text or tree subcommand, the separator between the package name and what follows is a space character. Pass the --separator option to specify a different separator;
with the text command, all relevant package names are included. Pass the --filter option to specify an item to be filtered out from the results, if present. An item can be $locals (for all project packages) or a package name. It can be specified multiple times;

Note

The special value $locals will need to be enclosed with single quotes to distinguish it from a shell variable.
external dependencies are excluded from the output. Pass the flag --external to include external dependencies;
the base package and its dependencies are included in the output. Pass the flag --no-include-base to exclude base and its dependencies;
there is no limit to the depth of the resolution of dependencies. Pass the --depth <depth> option to limit the depth;
all relevant packages are included in the output. Pass the --prune <packages> option to exclude the specified packages (including project packages), where <packages> is a list of package names separated by commas;
for all relevant project packages, relevant dependencies are included in the output. However, each project package for which dependencies are included can be specified as a target argument. The argument uses the same format as the stack build command but components of project packages are ignored. Non-project packages are also ignored;

Note

If the first target is one of cabal, json, text and tree, then a subcommand must be specified.
test components of project packages are excluded from the output. Pass the flag --test to include test components;
benchmark components of project packages are excluded from the output. Pass the flag --bench to include benchmark components; and
global packages for the specified version of GHC are those specified by the global package database of an installed GHC. Pass the flag --global-hints to use a hint file for global packages. If a hint file is used, GHC does not need to be installed.

Subcommands specify the format of the output, as follows:

cabal lists the packages in the format of exact Cabal constraints.

stack ls dependencies cabal [--[no-]external] [--[no-]include-base]
                            [--depth DEPTH] [--prune PACKAGES] [TARGET]
                            [--flag PACKAGE:[-]FLAG] [--test] [--bench]
                            [--global-hints]

For example (extract):

constraints:
, Cabal ==3.6.3.0
, Cabal-syntax ==3.6.0.0
, Glob ==0.10.2

json lists dependencies in JSON format (an array of objects).

stack ls dependencies json [--[no-]external] [--[no-]include-base]
                           [--depth DEPTH] [--prune PACKAGES] [TARGET]
                           [--flag PACKAGE:[-]FLAG] [--test] [--bench]
                           [--global-hints]

For example (extract):

[{"dependencies":["base","bytestring"],"license":"BSD3","location":{"type":"hackage","url":"https://hackage.haskell.org/package/zlib-0.6.3.0"},"name":"zlib","version":"0.6.3.0"},

Each object has the following keys:

name: zlib
version: 0.6.3.0
location:
  type: hackage
  url: https://hackage.haskell.org/package/zlib-0.6.3.0
licence: BSD3
dependencies:
- base
- bytestring

text (the default) lists the packages, each on a separate line.

stack ls dependencies text [--[no-]license] [--separator SEP]
                           [--filter ITEM] [--[no-]external]
                           [--[no-]include-base] [--depth DEPTH]
                           [--prune PACKAGES] [TARGET]
                           [--flag PACKAGE:[-]FLAG] [--test] [--bench]
                           [--global-hints]

For example (extract):

Cabal 3.6.3.0
Cabal-syntax 3.6.0.0
Glob 0.10.2

tree lists dependencies in the format of a tree.

stack ls dependencies tree [--[no-]license] [--separator SEP]
                           [--[no-]external] [--[no-]include-base]
                           [--depth DEPTH] [--prune PACKAGES] [TARGET]
                           [--flag PACKAGE:[-]FLAG] [--test] [--bench]
                           [--global-hints]

For example (extract):

Packages
└─┬ stack 2.10.0
  ├─┬ Cabal 3.6.3.0
  │ ├─┬ Win32 2.12.0.1
  │ │ ├─┬ base 4.16.3.0
  │ │ │ ├─┬ ghc-bignum 1.2
  │ │ │ │ └─┬ ghc-prim 0.8.0
  │ │ │ │   └── rts 1.0.2
  │ │ │ ├─┬ ghc-prim 0.8.0

The stack ls globals command¶

stack ls globals [--[no-]global-hints]

stack ls globals will list all the global packages in alphabetical order.

By default:

the global packages are those for the version of GHC specified by the snapshot according to a hints file. Pass the flag --no-global-hints to use the global package database of an installed GHC.

Note

For example, on Windows, stack ls globals will include a version of the Win32 and unix packages but stack ls globals --no-global-hints will exclude the unix package - and vice versa on Unix-like operating systems.

The stack ls snapshots command¶

stack ls snapshots [COMMAND] [-l|--lts] [-n|--nightly]

Available commands:
  local                    View local snapshots
  remote                   View remote snapshots

stack ls snapshots will list all the local snapshots by default. You can also view the remote snapshots using stack ls snapshots remote. It also supports options for viewing only lts (-l) and nightly (-n) snapshots.

The stack ls stack-colors command¶

stack ls stack-colors [--[no-]basic] [--[no-]sgr] [--[no-]example]

The British English spelling is also accepted (stack ls stack-colours).

stack ls stack-colors will list all of Stack's output styles. A number of different formats for the output are available, see stack ls stack-colors --help.

The default is a full report, with the equivalent SGR instructions and an example of the applied style. The latter can be disabled with flags --no-sgr and --no-example.

The flag --basic specifies a more basic report, in the format that is accepted by Stack's command line option --stack-colors and the stack-colors non-project specific configuration option.

stack ls tools [--filter TOOL_NAME]

stack ls tools will list Stack's installed tools. On Unix-like operating systems, they will be one or more versions of GHC. On Windows, they will include MSYS2. For example, on Windows the command:

yields output like:

ghc-9.4.1
ghc-9.2.4
ghc-9.0.2
msys2-20210604

The --filter <tool_name> option will filter the output by a tool name (e.g. 'ghc', 'ghc-git' or 'msys2'). The tool name is case sensitive. For example the command:

stack ls tools --filter ghc

yields output like:

ghc-9.4.1
ghc-9.2.4
ghc-9.0.2

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