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2 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Ian Manske
|
c747ec75c9
|
Add command_prelude module (#12291)
# Description
When implementing a `Command`, one must also import all the types
present in the function signatures for `Command`. This makes it so that
we often import the same set of types in each command implementation
file. E.g., something like this:
```rust
use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{
record, Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData,
ShellError, Signature, Span, Type, Value,
};
```
This PR adds the `nu_engine::command_prelude` module which contains the
necessary and commonly used types to implement a `Command`:
```rust
// command_prelude.rs
pub use crate::CallExt;
pub use nu_protocol::{
ast::{Call, CellPath},
engine::{Command, EngineState, Stack},
record, Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, IntoSpanned,
PipelineData, Record, ShellError, Signature, Span, Spanned, SyntaxShape, Type, Value,
};
```
This should reduce the boilerplate needed to implement a command and
also gives us a place to track the breadth of the `Command` API. I tried
to be conservative with what went into the prelude modules, since it
might be hard/annoying to remove items from the prelude in the future.
Let me know if something should be included or excluded.
|
||
KITAGAWA Yasutaka
|
752d25b004
|
separate commandline into subcommands (#11877)
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# Description
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Related issue and PR, #11825 #11864
This improves the signature of `commandline`.
## Before
`commandline` returns different types depending on the flags and an
aurgument.
| command | input | output | description |
|-----------------------------|---------|---------|----------------------------------------|
| `commandline` | nothing | string | get current cursor line |
| `commandline arg` | nothing | nothing | replace the cursor line with
`arg` |
| `commandline --append arg` | nothing | nothing | append `arg` to the
end of cursor line |
| `commandline --insert arg` | nothing | nothing | insert `arg` to the
position of cursor |
| `commandline --replace arg` | nothing | nothing | replace the cursor
line with `arg` |
| `commandline --cursor` | nothing | int | get current cursor position |
| `commandline --cursor pos` | nothing | nothing | set cursor position
to pos |
| `commandline --cursor-end` | nothing | nothing | set cursor position
to end |
`help commandline` shows that `commandline` accepts string as pipeline
input, but `commandline` ignores pipeline input.
```
Input/output types:
╭───┬─────────┬─────────╮
│ # │ input │ output │
├───┼─────────┼─────────┤
│ 0 │ nothing │ nothing │
│ 1 │ string │ string │
╰───┴─────────┴─────────╯
```
|