Hilbish/golibs/commander/commander.go

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// library for custom commands
/*
Commander is the library which handles Hilbish commands. This makes
the user able to add Lua-written commands to their shell without making
a separate script in a bin folder. Instead, you may simply use the Commander
library in your Hilbish config.
```lua
local commander = require 'commander'
commander.register('hello', function(args, sinks)
sinks.out:writeln 'Hello world!'
end)
```
In this example, a command with the name of `hello` is created
that will print `Hello world!` to output. One question you may
have is: What is the `sinks` parameter?
The `sinks` parameter is a table with 3 keys: `in`, `out`,
and `err`. All of them are a @Sink.
- `in` is the standard input.
You may use the read functions on this sink to get input from the user.
- `out` is standard output.
This is usually where command output should go.
- `err` is standard error.
This sink is for writing errors, as the name would suggest.
*/
package commander
import (
"hilbish/util"
"hilbish/golibs/bait"
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
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rt "github.com/arnodel/golua/runtime"
"github.com/arnodel/golua/lib/packagelib"
)
type Commander struct{
Events *bait.Bait
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
2022-04-04 10:40:02 +00:00
Loader packagelib.Loader
}
func New(rtm *rt.Runtime) Commander {
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
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c := Commander{
Events: bait.New(rtm),
}
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
2022-04-04 10:40:02 +00:00
c.Loader = packagelib.Loader{
Load: c.loaderFunc,
Name: "commander",
}
return c
}
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
2022-04-04 10:40:02 +00:00
func (c *Commander) loaderFunc(rtm *rt.Runtime) (rt.Value, func()) {
exports := map[string]util.LuaExport{
"register": util.LuaExport{c.cregister, 2, false},
"deregister": util.LuaExport{c.cderegister, 1, false},
}
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
2022-04-04 10:40:02 +00:00
mod := rt.NewTable()
util.SetExports(rtm, mod, exports)
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
2022-04-04 10:40:02 +00:00
return rt.TableValue(mod), nil
}
// register(name, cb)
// Adds a new command with the given `name`. When Hilbish has to run a command with a name,
// it will run the function providing the arguments and sinks.
// #param name string Name of the command
// #param cb function Callback to handle command invocation
/*
#example
-- When you run the command `hello` in the shell, it will print `Hello world`.
-- If you run it with, for example, `hello Hilbish`, it will print 'Hello Hilbish'
commander.register('hello', function(args, sinks)
local name = 'world'
if #args > 0 then name = args[1] end
sinks.out:writeln('Hello ' .. name)
end)
#example
*/
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
2022-04-04 10:40:02 +00:00
func (c *Commander) cregister(t *rt.Thread, ct *rt.GoCont) (rt.Cont, error) {
cmdName, cmd, err := util.HandleStrCallback(t, ct)
if err != nil {
return nil, err
}
c.Events.Emit("commandRegister", cmdName, cmd)
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
2022-04-04 10:40:02 +00:00
return ct.Next(), err
}
// deregister(name)
// Removes the named command. Note that this will only remove Commander-registered commands.
// #param name string Name of the command to remove.
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
2022-04-04 10:40:02 +00:00
func (c *Commander) cderegister(t *rt.Thread, ct *rt.GoCont) (rt.Cont, error) {
if err := ct.Check1Arg(); err != nil {
return nil, err
}
cmdName, err := ct.StringArg(0)
if err != nil {
return nil, err
}
c.Events.Emit("commandDeregister", cmdName)
refactor!: support lua 5.4 (#129) major rewrite which changes the library hilbish uses for it's lua vm this one implements lua 5.4, and since that's a major version bump, it's a breaking change. introduced here also is a fix for `hilbish.login` not being the right value * refactor: start work on lua 5.4 lots of commented out code ive found a go lua library which implements lua 5.4 and found an opportunity to start working on it. this commit basically removes everything and just leaves enough for the shell to be "usable" and able to start. there are no builtins or libraries (besides the `hilbish` global) * fix: call cont next in prompt function this continues execution of lua, very obvious fixes an issue with code stopping at the prompt function * fix: handle errors in user config * fix: handle panic in lua input if it is incorrect * feat: implement bait * refactor: use util funcs to run lua where possible * refactor: move arg handle function to util * feat: implement commander * feat: implement fs * feat: add hilbish module functions used by prelude * chore: use custom fork of golua * fix: make sure args to setenv are strings in prelude * feat: implement completions * chore: remove comment * feat: implement terminal * feat: implement hilbish.interval * chore: update lunacolors * chore: update golua * feat: implement aliases * feat: add input mode * feat: implement runner mode * style: use comma separated cases instead of fallthrough * feat: implement syntax highlight and hints * chore: add comments to document util functions * chore: fix dofile comment doc * refactor: make loader functions for go modules unexported * feat: implement job management * feat: add hilbish properties * feat: implement all hilbish module functions * feat: implement history interface * feat: add completion interface * feat: add module description docs * feat: implement os interface * refactor: use hlalias for add function in hilbish.alias interface * feat: make it so hilbish.run can return command output * fix: set hilbish.exitCode to last command exit code * fix(ansikit): flush on io.write * fix: deregister commander if return isnt number * feat: run script when provided path * fix: read file manually in DoFile to avoid shebang * chore: add comment for reason of unreading byte * fix: remove prelude error printing * fix: add names at chunk load for context in errors * fix: add newline at the beginning of file buffer when there is shebang this makes the line count in error messages line up properly * fix: remove extra newline after error
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return ct.Next(), err
}