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53 lines
2.0 KiB
Go
53 lines
2.0 KiB
Go
package edit
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// This file encapsulates functionality related to a complete REPL cycle. Such as capturing
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// information about the most recently executed interactive command.
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import (
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"src.elv.sh/pkg/eval"
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"src.elv.sh/pkg/eval/vals"
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"src.elv.sh/pkg/eval/vars"
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"src.elv.sh/pkg/parse"
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)
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//elvdoc:var after-command
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//
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// A list of functions to call after each interactive command completes. There is one pre-defined
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// function used to populate the [`$edit:command-duration`](./edit.html#edit:command-duration)
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// variable. Each function is called with a single [map](https://elv.sh/ref/language.html#map)
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// argument containing the following keys:
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//
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// * `src`: Information about the source that was executed, same as what
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// [`src`](builtin.html#src) would output inside the code.
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//
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// * `duration`: A [floating-point number](https://elv.sh/ref/language.html#number) representing the
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// command execution duration in seconds.
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//
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// * `error`: An [exception](../ref/language.html#exception) object if the command terminated with
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// an exception, else [`$nil`](../ref/language.html#nil).
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//
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// @cf edit:command-duration
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//elvdoc:var command-duration
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//
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// Duration, in seconds, of the most recent interactive command. This can be useful in your prompt
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// to provide feedback on how long a command took to run. The initial value of this variable is the
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// time to evaluate your [`rc.elv`](command.html#rc-file) before printing the first prompt.
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//
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// @cf edit:after-command
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func initRepl(ed *Editor, ev *eval.Evaler, nb eval.NsBuilder) {
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var commandDuration float64
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// TODO: Ensure that this variable can only be written from the Elvish code
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// in elv_init.go.
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nb.AddVar("command-duration", vars.FromPtr(&commandDuration))
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afterCommandHook := newListVar(vals.EmptyList)
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nb.AddVar("after-command", afterCommandHook)
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ed.AfterCommand = append(ed.AfterCommand,
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func(src parse.Source, duration float64, err error) {
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m := vals.MakeMap("src", src, "duration", duration, "error", err)
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callHooks(ev, "$<edit>:after-command", afterCommandHook.Get().(vals.List), m)
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})
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}
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