* Refactor InputStream and affected commands.
First, making `values` private and leaning on the `Stream` implementation makes
consumes of `InputStream` less likely to have to change in the future, if we
change what an `InputStream` is internally.
Second, we're dropping `Option<InputStream>` as the input to pipelines,
internals, and externals. Instead, `InputStream.is_empty` can be used to check
for "emptiness". Empty streams are typically only ever used as the first input
to a pipeline.
* Add run_external internal command.
We want to push external commands closer to internal commands, eventually
eliminating the concept of "external" completely. This means we can consolidate
a couple of things:
- Variable evaluation (for example, `$it`, `$nu`, alias vars)
- Behaviour of whole stream vs per-item external execution
It should also make it easier for us to start introducing argument signatures
for external commands,
* Update run_external.rs
* Update run_external.rs
* Update run_external.rs
* Update run_external.rs
Co-authored-by: Jonathan Turner <jonathandturner@users.noreply.github.com>
* Better message error
* Use custom canonicalize in FileStructure build
* Better glob error in ls
* Use custom canonicalize, remove some duplicate code in cd.
* Enable recursive copying with patterns.
* Change test to fit new error message
* Test recursive with glob pattern
* Show that not matches were found in cp
* Fix typo in message error
* Change old canonicalize usage, follow newest changes
* Expand n dots early where tilde was also expanded.
* Remove normalize, not needed.
New function absolutize, doesn't follow links neither checks existence.
Renamed canonicalize_existing to canonicalize, works as expected.
* Remove normalize usages, change canonicalize.
* Treat strings as paths
* Making Commands match what UntaggedValue needs
* WIP
* WIP
* WIP
* Moved to expressions for conditions
* Add 'each' command to use command blocks
* More cleanup
* Add test for 'each'
* Instead use an expression block
* New 'path' module under nu-cli.
Added normalize and canonicalize method.
Added some unit tests.
* Replace old usages of normalize and canonicalize.
* Fix reading symlinks and existence logic.
* Better explained
1. Fixed a bug where `--all` wasn't showing files at the root directories.
2. More use of `Result`'s `map` and `map_err` methods.
3. Making tables be homogeneous so one can, for example, `get directories`.
Previously, if the user didn't have the appropriate permissions to execute the
binary/script, they would see "command not found", which is confusing.
This commit eliminates the `which` crate in favour of `ichwh`, which deals
better with permissions by not dealing with them at all! This is closer to the
behaviour of `which` in many shells. Permission checks are then left up to the
caller to deal with.
Mostly, making more use of `map` and `map_err` in `Result`. One benefit
is that at least one location had duplicated logic for how to map the
error, which is no longer the case after this commit.
An interruptible stream can query an `AtomicBool. If that bool is true,
the stream will no longer produce any values.
Also introducing the `Interruptible` trait, which extends any `Stream`
with the `interruptible` function, to simplify the construction and
allow chaining.
