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Support o>>, e>>, o+e>> to append output to an external file (#10764)

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# Description
Close: #10278

This pr introduces `o>>`, `e>>`, `o+e>>` to allow redirection to append
to a file.
Examples:
```nushell
echo abc o>> a.txt
echo abc o>> a.txt
cat asdf e>> a.txt
cat asdf e>> a.txt
cat asdf o+e>> a.txt
```

~~TODO:~~
~~1. currently internal commands with `o+e>` redirect to a variable is
broken: `let x = "a.txt"; echo abc o+e> $x`, not sure when it was
introduced...~~
~~2. redirect stdout and stderr with append mode doesn't supported yet:
`cat asdf o>>a.txt e>>b.ext`~~

~~For these 2 items, I'd like to fix them in different prs.~~
Already done in this pr
This commit is contained in:
WindSoilder
2023-11-27 21:52:39 +08:00
committed by GitHub
parent 1ff8c2d81d
commit 077d1c8125
13 changed files with 364 additions and 147 deletions
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4
crates/nu-command/src/formats/from/nuon.rs
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@ -124,7 +124,7 @@ impl Command for FromNuon {
} else {
match pipeline.elements.remove(0) {
PipelineElement::Expression(_, expression)
| PipelineElement::Redirection(_, _, expression)
| PipelineElement::Redirection(_, _, expression, _)
| PipelineElement::And(_, expression)
| PipelineElement::Or(_, expression)
| PipelineElement::SameTargetRedirection {
@ -132,7 +132,7 @@ impl Command for FromNuon {
..
}
| PipelineElement::SeparateRedirection {
out: (_, expression),
out: (_, expression, _),
..
} => expression,
}