support custom Ide commands

[pepeiborra]

Consolidated commands in defaultMain and added support for defining Custom ones

[pepeiborra]

haskell-language-server - GHC Haskell LSP server

Usage: haskell-language-server [--version | --numeric-version | --probe-tools | 
                                 [COMMAND | --lsp | FILES/DIRS...] [--cwd DIR] 
                                 [--shake-profiling DIR] [--test] [--example] 
                                 [-d|--debug] [-l|--logfile LOGFILE] [-j NUM] 
                                 [--project-ghc-version] |
                                 --vscode-extension-schema | 
                                 --generate-default-config]
  Used as a test bed to check your IDE Client will work

Available options:
  --version                Show haskell-language-server and GHC versions
  --numeric-version        Show numeric version of haskell-language-server
  --probe-tools            Show haskell-language-server version and other tools
                           of interest
  --lsp                    Start talking to an LSP server
  --cwd DIR                Change to this directory
  --shake-profiling DIR    Dump profiling reports to this directory
  --test                   Enable additional lsp messages used by the testsuite
  --example                Include the Example Plugin. For Plugin devs only
  -d,--debug               Generate debug output
  -l,--logfile LOGFILE     File to log to, defaults to stdout
  -j NUM                   Number of threads (0: automatic) (default: 0)
  --project-ghc-version    Work out the project GHC version and print it
  --vscode-extension-schema
                           Print generic config schema for plugins (used in the
                           package.json of haskell vscode extension)
  --generate-default-config
                           Print config supported by the server with default
                           values
  -h,--help                Show this help text

Available commands:
  typecheck                Used as a test bed to check your IDE will work
  hiedb                    Query .hie files
  index                    Load the given files and index all the known targets
  lsp                      Start talking to an LSP client

[pepeiborra]

ghcide - the core of a Haskell IDE

Usage: ghcide [--cwd DIR] [--version] [--vscode-extension-schema] 
              [--generate-default-config] [--shake-profiling DIR] 
              [--ot-memory-profiling] [--test] [--test-no-kick] [-j NUM] 
              [--verbose] [COMMAND | --lsp | FILES/DIRS...]

Available options:
  --cwd DIR                Change to this directory
  --version                Show ghcide and GHC versions
  --vscode-extension-schema
                           Print generic config schema for plugins (used in the
                           package.json of haskell vscode extension)
  --generate-default-config
                           Print config supported by the server with default
                           values
  --shake-profiling DIR    Dump profiling reports to this directory
  --ot-memory-profiling    Record OpenTelemetry info to the eventlog. Needs the
                           -l RTS flag to have an effect
  --test                   Enable additional lsp messages used by the testsuite
  --test-no-kick           Disable kick. Useful for testing cancellation
  -j NUM                   Number of threads (0: automatic) (default: 0)
  --verbose                Include internal events in logging output
  --lsp                    Start talking to an LSP client
  -h,--help                Show this help text

Available commands:
  typecheck                Used as a test bed to check your IDE will work
  hiedb                    Query .hie files
  index                    Load the given files and index all the known targets
  lsp                      Start talking to an LSP client

[pepeiborra]

dist-newstyle/build/x86_64-osx/ghc-8.10.4/ghcide-1.1.0.0/x/ghcide/build/ghcide/ghcide index ghcide/src/Development/IDE.hs

ghcide version: 1.1.0.0 (GHC: 8.10) (PATH: /Users/pepeiborra/scratch/ide/dist-newstyle/build/x86_64-osx/ghc-8.10.4/ghcide-1.1.0.0/x/ghcide/build/ghcide/ghcide) (GIT hash: 32a8e70cd894ac11ea2d0dd0360c6be2d437d268)
 [INFO] Consulting the cradle for "ghcide/src/Development/IDE.hs"
Output from setting up the cradle Cradle {cradleRootDir = "/Users/pepeiborra/scratch/ide", cradleOptsProg = CradleAction: Cabal}
> Build profile: -w ghc-8.10.4 -O1
> In order, the following will be built (use -v for more details):
>  - ghcide-1.1.0.0 (lib) (ephemeral targets)
> Preprocessing library for ghcide-1.1.0.0..
[INFO] Using interface files cache dir: /Users/pepeiborra/.cache/ghcide/ghcide-1.1.0.0-inplace-fd5b55ee3ebaea18531542106613726f3620b9a0
[INFO] Making new HscEnv[ghcide-1.1.0.0-inplace]
[WARNING] File:     ghcide/src/Development/IDE.hs
Hidden:   no
Range:    1:1-2:1
Source:   compiler
Severity: DsError
Message: 
  user error (Failed to get the immediate reverse dependencies of NormalizedFilePath
  "ghcide/src/Development/IDE.hs")
Indexing 57 targets
Writing index... 
[INFO] finish: Index (took 2.81s)
/Users/pepeiborra/.cache/ghcide/3a52ce780950d4d969792a2559cd519d7ee8c727--8.10.4-1.hiedb

[pepeiborra]

dist-newstyle/build/x86_64-osx/ghc-8.10.4/haskell-language-server-1.0.0.0/x/haskell-language-server/build/haskell-language-server/haskell-language-server index ghcide/src/Development/IDE.hs 

haskell-language-server version: 1.0.0.0 (GHC: 8.10.4) (PATH: /Users/pepeiborra/scratch/ide/dist-newstyle/build/x86_64-osx/ghc-8.10.4/haskell-language-server-1.0.0.0/x/haskell-language-server/build/haskell-language-server/haskell-language-server) (GIT hash: 32a8e70cd894ac11ea2d0dd0360c6be2d437d268)
 2021-04-05 09:42:37.444791 [ThreadId 46] INFO hls:	Consulting the cradle for "ghcide/src/Development/IDE.hs"
Output from setting up the cradle Cradle {cradleRootDir = "/Users/pepeiborra/scratch/ide", cradleOptsProg = CradleAction: Cabal}
> Build profile: -w ghc-8.10.4 -O1
> In order, the following will be built (use -v for more details):
>  - ghcide-1.1.0.0 (lib) (ephemeral targets)
> Preprocessing library for ghcide-1.1.0.0..
2021-04-05 09:42:38.162667 [ThreadId 46] INFO hls:	Using interface files cache dir: /Users/pepeiborra/.cache/ghcide/ghcide-1.1.0.0-inplace-fd5b55ee3ebaea18531542106613726f3620b9a0
2021-04-05 09:42:38.163095 [ThreadId 46] INFO hls:	Making new HscEnv[ghcide-1.1.0.0-inplace]
2021-04-05 09:42:40.974549 [ThreadId 2881] WARNING hls:	File:     ghcide/src/Development/IDE.hs
Hidden:   no
Range:    1:1-2:1
Source:   compiler
Severity: DsError
Message: 
  user error (Failed to get the immediate reverse dependencies of NormalizedFilePath
  "ghcide/src/Development/IDE.hs")
Indexing 57 targets
Writing index... 
2021-04-05 09:42:41.047898 [ThreadId 3125] INFO hls:	finish: Index (took 2.70s)
/Users/pepeiborra/.cache/ghcide/3a52ce780950d4d969792a2559cd519d7ee8c727--8.10.4-1.hiedb

[pepeiborra]

In the end the index command wasn't exactly what I needed, but the changes in the PR are valuable. And to simplify the definition of custom commands, I have added a new Custom constructor

[berberman]

LGTM

[rayshih]

a new Custom constructor

Awesome!