Commit Graph

1447 Commits

Author SHA1 Message Date
Thomas Hartmann
20e891db6e Move variable assignment to clarify use. 2019-10-13 23:10:54 +02:00
Thomas Hartmann
38b5979881 Make usage string clearer. 2019-10-13 23:09:24 +02:00
Thomas Hartmann
8422d40e2c Add from-ssv to readme. 2019-10-13 23:09:10 +02:00
Thomas Hartmann
de1c4e6c88 Implements from-ssv 2019-10-13 22:50:45 +02:00
Thomas Hartmann
648d4865b1 Adds unimplemented module, tests. 2019-10-13 21:15:30 +02:00
Jonathan Turner
7d4fec4db3
Merge pull request #817 from thegedge/bump-heim
Bump heim in Cargo.toml to match Cargo.lock
2019-10-14 07:41:38 +13:00
Jason Gedge
0f7e73646f Bump heim in Cargo.toml to match Cargo.lock 2019-10-13 14:21:44 -04:00
Jonathan Turner
bd6ca75032
Merge pull request #814 from thegedge/fix-ls-bug-with-broken-symlinks
Ignore errors in `ls`.
2019-10-14 05:52:02 +13:00
Jason Gedge
341cc1ea63 Ignore errors in ls.
`std::fs::metadata` will attempt to follow symlinks, which results in a
"No such file or directory" error if the path pointed to by the symlink
does not exist. This shouldn't prevent `ls` from succeeding, so we
ignore errors.

Also, switching to use of `symlink_metadata` means we get stat info on
the symlink itself, not what it points to. This means `ls` will now
include broken symlinks in its listing.
2019-10-13 12:26:31 -04:00
Jonathan Turner
2716bb020f
Fix #811 (#813) 2019-10-13 17:53:58 +13:00
Jonathan Turner
193b00764b
Stream support (#812)
* Moves off of draining between filters. Instead, the sink will pull on the stream, and will drain element-wise. This moves the whole stream to being lazy.
* Adds ctrl-c support and connects it into some of the key points where we pull on the stream. If a ctrl-c is detect, we immediately halt pulling on the stream and return to the prompt.
* Moves away from having a SourceMap where anchor locations are stored. Now AnchorLocation is kept directly in the Tag.
* To make this possible, split tag and span. Span is largely used in the parser and is copyable. Tag is now no longer copyable.
2019-10-13 17:12:43 +13:00
Yehuda Katz
8ca678440a
Merge pull request #810 from nushell/feature-flags
Feature flagging infrastructure
2019-10-11 17:47:25 -07:00
Yehuda Katz
439889dcef Feature flagging infrastructure
This commit adds the ability to work on features behind a feature flag
that won't be included in normal builds of nu.

These features are not exposed as Cargo features, as they reflect
incomplete features that are not yet stable.

To create a feature, add it to `features.toml`:

```toml
[hintsv1]

description = "Adding hints based on error states in the highlighter"
enabled = false
```

Each feature in `features.toml` becomes a feature flag accessible to `cfg`:

```rs
println!("hintsv1 is enabled");
```

By default, features are enabled based on the value of the `enabled` field.

You can also enable a feature from the command line via the
`NUSHELL_ENABLE_FLAGS` environment variable:

```sh
$ NUSHELL_ENABLE_FLAGS=hintsv1 cargo run
```

You can enable all flags via `NUSHELL_ENABLE_ALL_FLAGS`.

This commit also updates the CI setup to run the build with all flags off and
with all flags on. It also extracts the linting test into its own
parallelizable test, which means it doesn't need to run together with every
other test anymore.

When working on a feature, you should also add tests behind the same flag. A
commit is mergable if all tests pass with and without the flag, allowing
incomplete commits to land on master as long as the incomplete code builds and
passes tests.
2019-10-11 17:19:44 -07:00
Thomas Hartmann
5ec6bac7d9 Removes redundant parens. 2019-10-11 21:39:11 +02:00
Thomas Hartmann
af2ec60980 Shell.nix cleanup. 2019-10-11 21:13:00 +02:00
Thomas Hartmann
f0ca0312f3 Adds racer, formats shell.nix 2019-10-11 19:06:24 +02:00
Jonathan Turner
3317b137e5
Merge pull request #728 from nushell/better-pseudo-blocks
[DON'T MERGE] Overhaul the expansion system
2019-10-11 17:28:33 +13:00
Yehuda Katz
c2c10e2bc0 Overhaul the coloring system
This commit replaces the previous naive coloring system with a coloring
system that is more aligned with the parser.

The main benefit of this change is that it allows us to use parsing
rules to decide how to color tokens.

For example, consider the following syntax:

```
$ ps | where cpu > 10
```

Ideally, we could color `cpu` like a column name and not a string,
because `cpu > 10` is a shorthand block syntax that expands to
`{ $it.cpu > 10 }`.

The way that we know that it's a shorthand block is that the `where`
command declares that its first parameter is a `SyntaxShape::Block`,
which allows the shorthand block form.

In order to accomplish this, we need to color the tokens in a way that
corresponds to their expanded semantics, which means that high-fidelity
coloring requires expansion.

This commit adds a `ColorSyntax` trait that corresponds to the
`ExpandExpression` trait. The semantics are fairly similar, with a few
differences.

First `ExpandExpression` consumes N tokens and returns a single
`hir::Expression`. `ColorSyntax` consumes N tokens and writes M
`FlatShape` tokens to the output.

Concretely, for syntax like `[1 2 3]`

- `ExpandExpression` takes a single token node and produces a single
  `hir::Expression`
- `ColorSyntax` takes the same token node and emits 7 `FlatShape`s
  (open delimiter, int, whitespace, int, whitespace, int, close
  delimiter)

Second, `ColorSyntax` is more willing to plow through failures than
`ExpandExpression`.

In particular, consider syntax like

```
$ ps | where cpu >
```

In this case

- `ExpandExpression` will see that the `where` command is expecting a
  block, see that it's not a literal block and try to parse it as a
  shorthand block. It will successfully find a member followed by an
  infix operator, but not a following expression. That means that the
  entire pipeline part fails to parse and is a syntax error.
- `ColorSyntax` will also try to parse it as a shorthand block and
  ultimately fail, but it will fall back to "backoff coloring mode",
  which parsing any unidentified tokens in an unfallible, simple way. In
  this case, `cpu` will color as a string and `>` will color as an
  operator.

Finally, it's very important that coloring a pipeline infallibly colors
the entire string, doesn't fail, and doesn't get stuck in an infinite
loop.

In order to accomplish this, this PR separates `ColorSyntax`, which is
infallible from `FallibleColorSyntax`, which might fail. This allows the
type system to let us know if our coloring rules bottom out at at an
infallible rule.

It's not perfect: it's still possible for the coloring process to get
stuck or consume tokens non-atomically. I intend to reduce the
opportunity for those problems in a future commit. In the meantime, the
current system catches a number of mistakes (like trying to use a
fallible coloring rule in a loop without thinking about the possibility
that it will never terminate).
2019-10-10 19:30:04 -07:00
Thomas Hartmann
d2eb6f6646 Adds .envrc and shell.nix 2019-10-10 21:23:12 +02:00
Yehuda Katz
1ad9d6f199 Overhaul the expansion system
The main thrust of this (very large) commit is an overhaul of the
expansion system.

The parsing pipeline is:

- Lightly parse the source file for atoms, basic delimiters and pipeline
  structure into a token tree
- Expand the token tree into a HIR (high-level intermediate
  representation) based upon the baseline syntax rules for expressions
  and the syntactic shape of commands.

Somewhat non-traditionally, nu doesn't have an AST at all. It goes
directly from the token tree, which doesn't represent many important
distinctions (like the difference between `hello` and `5KB`) directly
into a high-level representation that doesn't have a direct
correspondence to the source code.

At a high level, nu commands work like macros, in the sense that the
syntactic shape of the invocation of a command depends on the
definition of a command.

However, commands do not have the ability to perform unrestricted
expansions of the token tree. Instead, they describe their arguments in
terms of syntactic shapes, and the expander expands the token tree into
HIR based upon that definition.

For example, the `where` command says that it takes a block as its first
required argument, and the description of the block syntactic shape
expands the syntax `cpu > 10` into HIR that represents
`{ $it.cpu > 10 }`.

This commit overhauls that system so that the syntactic shapes are
described in terms of a few new traits (`ExpandSyntax` and
`ExpandExpression` are the primary ones) that are more composable than
the previous system.

The first big win of this new system is the addition of the `ColumnPath`
shape, which looks like `cpu."max ghz"` or `package.version`.
Previously, while a variable path could look like `$it.cpu."max ghz"`,
the tail of a variable path could not be easily reused in other
contexts. Now, that tail is its own syntactic shape, and it can be used
as part of a command's signature.

This cleans up commands like `inc`, `add` and `edit` as well as
shorthand blocks, which can now look like `| where cpu."max ghz" > 10`
2019-10-10 08:27:51 -07:00
Andrés N. Robalino
e18892000a
Merge pull request #802 from twe4ked/improve-cd-docs
Improve cd docs
2019-10-08 20:20:28 -05:00
Odin Dutton
4d70255696 Add documentation for cd - 2019-10-08 18:32:42 +11:00
Odin Dutton
77c34acb03 Whitespace 2019-10-08 18:32:42 +11:00
Odin Dutton
e72bc8ea8b Remove unneeded - 2019-10-08 18:32:39 +11:00
Jonathan Turner
a882e640e4
Merge pull request #793 from chhetripradeep/pchhetri/enter
Add documentation for the enter command
2019-10-08 06:02:49 +13:00
Pradeep Chhetri
c09d866a77 Add documentation for the enter command 2019-10-07 23:21:58 +08:00
Jonathan Turner
4467e59122
Merge pull request #792 from chhetripradeep/pchhetri/open
Add documentation for the open command
2019-10-07 11:17:28 +11:00
Jonathan Turner
9c096d320a
Merge pull request #797 from chhetripradeep/pchhetri/fetch
Add documentation for the fetch command
2019-10-07 11:16:36 +11:00
Pradeep Chhetri
9f15017032 Add documentation for the fetch command 2019-10-07 02:17:57 +08:00
Pradeep Chhetri
81fec11f88 Add documentation for the open command 2019-10-07 02:08:20 +08:00
Jonathan Turner
8a6a688131
Merge pull request #795 from chhetripradeep/pchhetri/inc
Add documentation for the inc command
2019-10-07 04:35:08 +11:00
Jonathan Turner
77a4de31fa
Merge pull request #794 from chhetripradeep/pchhetri/sys
Add documentation for the sys command
2019-10-07 04:33:51 +11:00
Jonathan Turner
09e88d127e
Merge pull request #791 from chhetripradeep/pchhetri/trim
Add documentation for the trim command
2019-10-07 04:30:52 +11:00
Pradeep Chhetri
7ff5734d5d Add documentation for the inc command 2019-10-06 23:30:52 +08:00
Pradeep Chhetri
1d19595996 Add documentation for the sys command 2019-10-06 23:20:48 +08:00
Pradeep Chhetri
7d115da782 Add documentation for the trim command 2019-10-06 22:35:38 +08:00
Andrés N. Robalino
b066775630
Merge pull request #789 from cristicismas/patch-1
Update cd.md to look better
2019-10-04 16:24:42 -05:00
Andrés N. Robalino
8bb6bcb6eb
Merge pull request #790 from mfarberbrodsky/add-nth-docs
Add documentation for nth command
2019-10-04 16:24:06 -05:00
Maya Farber Brodsky
20031861b9 Add documentation for nth command 2019-10-04 17:37:11 +03:00
Cristi Cismas
eb297d3b8f
Update cd.md to look better 2019-10-04 15:10:46 +03:00
Andrés N. Robalino
8faa0126eb
Merge pull request #784 from coolshaurya/to-dash-sth-docs
Added docs for most of the to-sth commands
2019-10-03 21:47:00 -05:00
Shaurya Shubham
6aec03708f Fix minor typo 2019-10-04 06:44:45 +05:30
Shaurya Shubham
2f7b1e4282 Added improvements suggested by @andrasio
Added `open file.sth | to-sth` type examples
Also did a format conversion example with `open jonathon.xml | to-json` in to-json.md
2019-10-04 06:40:16 +05:30
Andrés N. Robalino
7492131142
Merge pull request #770 from rnxpyke/master
add regex match plugin
2019-10-03 14:20:41 -05:00
Andrés N. Robalino
3c6ee63e59
Merge pull request #777 from JonnyWalker81/fix-get-panic
Attempt at fixing `get` command panic.
2019-10-03 14:02:51 -05:00
Andrés N. Robalino
45ad18f654
Merge pull request #785 from Charles-Schleich/master
Created Docs for env command
2019-10-03 14:00:51 -05:00
Andrés N. Robalino
01829f04d5
Merge pull request #783 from notryanb/document-last
add documentation for the last command
2019-10-03 13:59:41 -05:00
Andrés N. Robalino
cc1c471877
Merge pull request #779 from pema99/lines-doc
Add documentation for lines
2019-10-03 13:58:30 -05:00
Andrés N. Robalino
de14f9fce8
Merge pull request #781 from coolshaurya/add-command-docs
Create docs for add command
2019-10-03 13:38:11 -05:00
Andrés N. Robalino
6c3ed1dbc2
Merge pull request #782 from coolshaurya/docs-edit-command
Create docs for edit command
2019-10-03 13:37:49 -05:00