Running shell commands

[chshersh]

Implement functions to run Shell commands easier in the Iris applications. A simple implementation would be something like this (inspired by shellmet):

-- | Run the command but don't print it
shellSilent
    :: FilePath  -- ^ Executable name
    -> [Text]    -- ^ Arguments
    -> IO ()

-- | Run the command and print the command itself to stderr
shell
    :: Text      -- ^ Prompt
    -> FilePath  -- ^ Executable name
    -> [Text]    -- ^ Arguments
    -> IO ()

-- | Run the command, don't print it and return its stdout
shellRetSilent
    :: FilePath  -- ^ Executable name
    -> [Text]    -- ^ Arguments
    -> IO Text

-- | Run the command, print it with prompt to stderr and return its stdout
shellRet
    :: Text      -- ^ Prompt
    -> FilePath  -- ^ Executable name
    -> [Text]    -- ^ Arguments
    -> IO Text

Alternatively, we can integrate with one of the existing and battle-tested libraries:

• shellmet
• typed-process

Possible usage inside Iris itself — Iris.Browse module:

https://github.com/chshersh/iris/blob/7e694331069c7732fa70235767c472e23dbf402b/src/Iris/Browse.hs#L69-L74

Open questions:

• [ ] Would it make sense to run those commands in MonadReader CliEnv to use something specific for running shell commands?