Commit Graph

605 Commits

Author SHA1 Message Date
Leonhard Kipp
0dd1403a69
Sleep command (#2381)
* Add deserialization of Primitive::Duration; Fixes #2373

* Implement Sleep command

* Add comment saying you should name your rest field "rest"

* Fix typo

* Add documentation for sleep command
2020-08-22 05:51:29 +12:00
Matt Clarke
c59f860b48
Renamed time units (#2356)
* Changed time units as outlined in issue #2353.
Also applied changes to to_str for Unit - not sure if that was what was wanted.

* Forgot the tests!

* Updated primitive.rs to match changes.

* Updated where example to match changes.

* And the html test!
2020-08-16 07:03:28 +12:00
Jonathan Turner
da4d24d082
Bump to 0.18.2. Move starship external. (#2345)
* Bump to 0.18.2. Move starship external.

* Fix failing test
2020-08-14 07:02:45 +12:00
Jonathan Turner
87d71604ad
Bump to 0.18.1 (#2335) 2020-08-12 15:59:28 +12:00
Jonathan Turner
2ad07912d9
Bump to 0.18 (#2325) 2020-08-11 18:44:53 +12:00
Jonathan Turner
50343f2d6a
Add stderr back when using do -i (#2309)
* Add stderr back when using do -i

* Add stderr back when using do -i
2020-08-07 16:53:37 +12:00
Jason Gedge
cda53b6cda
Return incomplete parse from lite_parse (#2284)
* Move lite_parse tests into a submodule

* Have lite_parse return partial parses when error encountered.

Although a parse fails, we can generally still return what was successfully
parsed. This is useful, for example, when figuring out completions at some
cursor position, because we can map the cursor to something more structured
(e.g., cursor is at a flag name).
2020-08-02 06:39:55 +12:00
Joseph T. Lyons
9fb6f5cd09
Change f/full flag to l/long for ls and ps commands (#2283)
* Change `f`/`full` flag to `l`/`long` for `ls` and `ps` commands

* Fix a few more `--full` instances
2020-08-02 06:30:45 +12:00
Jonathan Turner
2a084fc838
Bump to 0.17.0 (#2237) 2020-07-22 06:41:49 +12:00
bailey-layzer
836efd237c
fix internal command parsing (args.is_last) (#2224) 2020-07-20 05:49:40 +12:00
Philip Peterson
1f0962eb08
Add some tests for parse_arg (#2220)
* add some tests for parse

* Format

* fix warnings
2020-07-19 19:12:56 +12:00
Pierre-André Gagnon
e07a9e4ee7
1747 add ns to duration (#2128)
* Added nanos to Duration

* Removed unwraps

* Added nanos to Duration

* Removed unwraps

* Fixed errors

* Removed unwraps

* Changed serialization to String

* Fixed Date and Duration comparison
2020-07-11 05:48:11 +12:00
Jonathan Turner
d30c40b40e
Bump to 0.16.1 (#2116) 2020-07-06 08:12:44 +12:00
Jonathan Turner
04120e00e4
Oops, fix crash in parser updates (#2108) 2020-07-05 08:56:54 +12:00
Jonathan Turner
e75c44c95b
If command and touchups (#2106) 2020-07-05 07:40:04 +12:00
Philip Peterson
0629c896eb
Return error for unterminated string in bareword parser (#2103)
* add some tests

* add failing tests

* use some; fix test

* clean up code, flesh out tests

* cargo fmt
2020-07-04 17:14:31 +12:00
Jason Gedge
180290f3a8
Remove custom escaping for external args. (#2095)
Our own custom escaping unfortunately is far too simple to cover all cases.
Instead, the parser will now do no transforms on the args passed to an external
command, letting the process spawning library deal with doing the appropriate
escaping.
2020-07-03 11:29:28 +12:00
Jonathan Turner
0522023d4c
Bump to 0.16.0 (#2084) 2020-07-01 06:25:09 +12:00
Jonathan Turner
7fed9992c9
Bump deps and touchup (#2066) 2020-06-27 19:54:31 +12:00
Jonathan Turner
29ea29261d
Bump to 0.15.1 (#1984) 2020-06-15 09:54:30 +12:00
Jonathan Turner
982f067d0e
Proper precedence history in math (#1966) 2020-06-12 05:17:08 +12:00
Jonathan Turner
e5a18eb3c2
Bump to 0.15.0 (#1955) 2020-06-10 05:33:59 +12:00
k-brk
9567c1f564
Fix for inconsistency when quoted strings are used with with_env shorthand (#1900) 2020-05-26 15:03:55 -04:00
Jason Gedge
005d76cf57
Fix broken ordering of args when parsing command with env vars. (#1841) 2020-05-24 19:26:27 -04:00
Jonathan Turner
ed80933806
String interpolation (#1849)
* Add string interpolation

* fix coloring

* A few more fixups + tests

* merge master again
2020-05-20 07:27:26 +12:00
Jonathan Turner
b89976daef
let format access variables also (#1842) 2020-05-19 16:20:09 +12:00
Jonathan Turner
0743b69ad5
Move from language-reporting to codespan (#1825) 2020-05-19 06:44:27 +12:00
Jonathan Turner
0abc94f0c6
Bump some of our dependencies (#1809) 2020-05-17 10:34:10 +12:00
Jonathan Turner
f43ed23ed7
Fix parsing of invocations with a dot (#1804) 2020-05-16 19:25:18 +12:00
Jonathan Turner
076fde16dd
Evaluation of command arguments (#1801)
* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* Finish adding the baseline refactors for argument invocation

* Finish cleanup and add test

* Add missing plugin references
2020-05-16 15:18:24 +12:00
Jonathan Turner
196991ae1e
Bump to 0.14.1 (#1772) 2020-05-13 20:03:45 +12:00
Jonathan Turner
b2eecfb110
Bump to 0.14 (#1766) 2020-05-13 04:32:51 +12:00
Jonathan Turner
c06a692709
Bash-like shorthand with-env (#1718)
* Bash-like shorthand with-env

* fix clippy warning
2020-05-06 18:57:37 +12:00
Jonathan Turner
a9968046ed
Add subcommands. Switch from-* and to-* to them (#1708) 2020-05-04 20:44:33 +12:00
chrisr
ada92f41b4
Parse file size (byte) units in all mixes of case (#1693) 2020-05-02 14:14:07 -04:00
Mohammed Anas
789b28ac8a
Convert if expression to match (#1683) 2020-04-30 12:59:50 +12:00
Jonathan Turner
df90d9e4b6
Fix access to columns with quoted names (#1662) 2020-04-26 18:01:55 +12:00
Jonathan Turner
ad7a3fd908
Add not-in: operator (#1661) 2020-04-26 17:32:17 +12:00
rimathia
e7767ab7b3
suppress the parser error for an insufficient number of required arguments if the named keyword argument 'help' is given (#1659) 2020-04-26 04:45:45 +12:00
Kevin Del Castillo
9ec2aca86f
Support completion for paths with multiple dots (#1640)
* refactor: expand_path and expand_ndots now work for any string.

* refactor: refactor test and add new ones.

* refactor: convert expanded to owned string

* feat: pub export of expand_ndots

* feat: add completion for ndots in fs-shell
2020-04-23 16:17:38 +12:00
Jonathan Turner
88f06c81b2
Update Cargo.toml 2020-04-22 06:34:32 +12:00
Jonathan Turner
c7e11a5a28
bump to 0.13.0 (#1625) 2020-04-21 17:01:03 +12:00
Jonathan Turner
e4fdb36511
External vars (#1615)
* fix empty table and missing spans

* wip

* WIP

* WIP

* working version with vars

* tidying

* WIP

* Fix external quoting issue
2020-04-21 09:45:11 +12:00
Jonathan Turner
2ffb14c7d0
fix empty table and missing spans (#1614) 2020-04-20 19:44:19 +12:00
Jonathan Turner
eec94e4016
Semicolon (#1613)
* WIP on blocks

* Getting further

* add some tests
2020-04-20 18:41:51 +12:00
Jason Gedge
522a828687
Move external closer to internal (#1611)
* 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>
2020-04-20 15:30:44 +12:00
Jonathan Turner
a16a91ede8
Fix precedence parsing of parens. Limit use (#1606) 2020-04-19 06:39:06 +12:00
Jonathan Turner
c2a9bc3bf4
Add better docs to parser (#1604) 2020-04-19 05:30:40 +12:00
Jonathan Turner
7974e09eeb
Math operators (#1601)
* Add some math operations

* WIP for adding compound expressions

* precedence parsing

* paren expressions

* better lhs handling

* add compound comparisons and shorthand lefthand parsing

* Add or comparison and shorthand paths
2020-04-18 13:50:58 +12:00
Kevin Del Castillo
928188b18e
Redesign custom canonicalize, enable multiple dots expansion earlier. (#1588)
* 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
2020-04-16 11:29:22 +12:00
Jonathan Turner
e3da037b80
Canonical expr block (#1584)
* Add the canonical form for an expression block

* Remove commented out code
2020-04-14 06:59:33 +12:00
Jonathan Turner
08a09e2273
Pipeline blocks (#1579)
* 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
2020-04-13 19:59:57 +12:00
Jonathan Turner
8ac9d781fd
Remove source text where not needed (#1567) 2020-04-10 19:56:48 +12:00
Jonathan Turner
183c8407de
fix nu variable. tweak shells (#1558) 2020-04-07 05:30:54 +12:00
Jonathan Turner
c4daa2e40f
Add experimental new parser (#1554)
Move to an experimental new parser
2020-04-06 19:16:14 +12:00
Jonathan Turner
791f7dd9c3
Bump to 0.12.0 (#1538) 2020-04-01 06:25:21 +13:00
Andrés N. Robalino
b36d21e76f
Infer types from regular delimited plain text unstructured files. (#1494)
* Infer types from regular delimited plain text unstructured files.

* Nothing resolves to an empty string.
2020-03-16 15:50:45 -05:00
Kevin DCR
b6363f3ce1
Added new flag '--all/-a' for Ls, also refactor some code (#1483)
* Utility function to detect hidden folders.
Implemented for Unix and Windows.

* Rename function argument.

* Revert "Rename function argument."

This reverts commit e7ab70f0f0.

* Add flag '--all/-a' to Ls

* Rename function argument.

* Check if flag '--all/-a' is present and path is hidden.
Replace match with map_err for glob result.
Remove redundancy in stream body.
Included comments on new stream body.
Replace async_stream::stream with async_stream::try_stream.
Minor tweaks to is_empty_dir.
Fix and refactor is_hidden_dir.

* Fix "implicit" bool coerse

* Fixed clippy errors
2020-03-14 06:27:04 +13:00
Jonathan Turner
62666bebc9
Bump to 0.11.0 (#1474) 2020-03-11 06:34:19 +13:00
rabisg0
d1fcce0cd3
Fixes #1427: Prints help message with -h switch (#1454)
For some commands like `which` -h flag would trigger an error asking for
missing required parameters instead of printing the help message as it
does with --help. This commit adds a check in the command parser to
avoid that.
2020-03-11 05:59:50 +13:00
Andrés N. Robalino
a2443fbe02
Remove unused parsing logic. (#1473)
* Remove unused parsing logic.

* Run tokens iteration tests baseline.

* Pass lint.

* lifetimes can be elided without being explicit.
2020-03-10 04:31:42 -05:00
Andrés N. Robalino
59cb0ba381
Color appropiately commands. (#1453) 2020-03-04 23:22:42 -05:00
Corvus Corax
6d096206b6
Add support for compound shorthand flags (#1414)
* Break multicharacter shorthand flags into single character flags

* Remove shorthand flag test
2020-03-01 13:20:42 +13:00
Andrés N. Robalino
18d988d4c8
Restrict short-hand flag detection to exact match. (#1406) 2020-02-18 01:58:30 -05:00
Jonathan Turner
0f7c723672
Bump version to 0.10.0 (#1403) 2020-02-18 16:56:09 +13:00
Andrés N. Robalino
84927d52b5
Refuse internal command execution given unexpected arguments. (#1383) 2020-02-13 02:34:43 -05:00
Andrés N. Robalino
73312b506f
Finer grained parsing and coloring command tail. (#1382) 2020-02-12 20:20:19 -05:00
Corvus Corax
c0be02a434
Short-hand flags (#1378)
* typo fixes

* Change signature to take in short-hand flags

* update help information

* Parse short-hand flags as their long counterparts

* lints

* Modified a couple tests to use shorthand flags
2020-02-11 18:24:31 -08:00
Andrés N. Robalino
2ab8d035e6
External it and nu variable column path fetch support. (#1379) 2020-02-11 18:25:56 -05:00
Andrés N. Robalino
24094acee9
Allow switch flags anywhere in the pipeline. (#1375) 2020-02-11 03:49:00 -05:00
Jonathan Turner
5f4fae5b06 Pipeline sink refactor (#1359)
* Refactor pipeline ahead of block changes. Add '-c' commandline option

* Update pipelining an error value

* Fmt

* Clippy

* Add stdin redirect for -c flag

* Add stdin redirect for -c flag
2020-02-08 18:24:33 -08:00
Andrés N. Robalino
3610baa227
Default plugins are independent and called from Nu. (#1322) 2020-01-31 17:45:33 -05:00
Jonathan Turner
763fcbc137
Bump to 0.9.0 (#1297) 2020-01-29 15:17:02 +13:00
Andrés N. Robalino
f20a4a42e8
Let's the expander look for tokens from start. (#1293) 2020-01-28 01:03:28 -05:00
Jonathan Turner
6da9e2aced
Upgrade crossterm (#1288)
* WIP

* Finish porting to new crossterm

* Fmt
2020-01-27 15:51:46 +13:00
Jonathan Turner
798a24eda5
Soften restrictions for external parameters (#1277)
* Soften restrictions for external parameters

* Add test
2020-01-25 08:14:49 +13:00
Andrés N. Robalino
fe4ad5f77e
Color named type help especial case. (#1263)
Refactored out help named type as switch.
2020-01-22 19:36:48 -05:00
Yehuda Katz
7efb31a4e4 Restructure and streamline token expansion (#1123)
Restructure and streamline token expansion

The purpose of this commit is to streamline the token expansion code, by
removing aspects of the code that are no longer relevant, removing
pointless duplication, and eliminating the need to pass the same
arguments to `expand_syntax`.

The first big-picture change in this commit is that instead of a handful
of `expand_` functions, which take a TokensIterator and ExpandContext, a
smaller number of methods on the `TokensIterator` do the same job.

The second big-picture change in this commit is fully eliminating the
coloring traits, making coloring a responsibility of the base expansion
implementations. This also means that the coloring tracer is merged into
the expansion tracer, so you can follow a single expansion and see how
the expansion process produced colored tokens.

One side effect of this change is that the expander itself is marginally
more error-correcting. The error correction works by switching from
structured expansion to `BackoffColoringMode` when an unexpected token
is found, which guarantees that all spans of the source are colored, but
may not be the most optimal error recovery strategy.

That said, because `BackoffColoringMode` only extends as far as a
closing delimiter (`)`, `]`, `}`) or pipe (`|`), it does result in
fairly granular correction strategy.

The current code still produces an `Err` (plus a complete list of
colored shapes) from the parsing process if any errors are encountered,
but this could easily be addressed now that the underlying expansion is
error-correcting.

This commit also colors any spans that are syntax errors in red, and
causes the parser to include some additional information about what
tokens were expected at any given point where an error was encountered,
so that completions and hinting could be more robust in the future.

Co-authored-by: Jonathan Turner <jonathandturner@users.noreply.github.com>
Co-authored-by: Andrés N. Robalino <andres@androbtech.com>
2020-01-21 17:45:03 -05:00
Corvus Corax
a5c5b4e711 Add --help for commands (#1226)
* WIP --help works for PerItemCommands.

* De-linting

* Add more comments (#1228)

* Add some more docs

* More docs

* More docs

* More docs (#1229)

* Add some more docs

* More docs

* More docs

* Add more docs

* External commands: wrap values that contain spaces in quotes (#1214) (#1220)

* External commands: wrap values that contain spaces in quotes (#1214)

* Add fn's argument_contains_whitespace & add_quotes (#1214)

*  Fix formatting with cargo fmt

* Don't wrap argument in quotes when $it is already quoted (#1214)

* Implement --help for internal commands

* Externals now spawn independently. (#1230)

This commit changes the way we shell out externals when using the `"$it"` argument. Also pipes per row to an external's stdin if no `"$it"` argument is present for external commands. 

Further separation of logic (preparing the external's command arguments, getting the data for piping, emitting values, spawning processes) will give us a better idea for lower level details regarding external commands until we can find the right abstractions for making them more generic and unify within the pipeline calling logic of Nu internal's and external's.

* Poll externals quicker. (#1231)

* WIP --help works for PerItemCommands.

* De-linting

* Implement --help for internal commands

* Make having --help the default

* Update test to include new default switch

Co-authored-by: Jonathan Turner <jonathandturner@users.noreply.github.com>
Co-authored-by: Koenraad Verheyden <mail@koenraadverheyden.com>
Co-authored-by: Andrés N. Robalino <andres@androbtech.com>
2020-01-18 11:46:18 +13:00
Andrés N. Robalino
29431e73c2
Externals now spawn independently. (#1230)
This commit changes the way we shell out externals when using the `"$it"` argument. Also pipes per row to an external's stdin if no `"$it"` argument is present for external commands. 

Further separation of logic (preparing the external's command arguments, getting the data for piping, emitting values, spawning processes) will give us a better idea for lower level details regarding external commands until we can find the right abstractions for making them more generic and unify within the pipeline calling logic of Nu internal's and external's.
2020-01-16 04:05:53 -05:00
Jonathan Turner
41ebc6b42d
Bump to 0.8.0 (#1166) 2020-01-07 20:08:31 +13:00
Jonathan Turner
77d856fd53
Last unwraps (#1160)
* Work through most of the last unwraps

* Finish removing unwraps
2020-01-04 19:44:17 +13:00
Jonathan Turner
5919c6c433
Remove unwraps (#1153)
* Remove a batch of unwraps

* finish another batch
2020-01-04 10:11:21 +13:00
Jonathan Turner
3e3cb15f3d
Yet more ununwraps (#1150) 2020-01-02 20:07:17 +13:00
Jonathan Turner
0f626dd076
Another batch of un-unwrapping (#1148)
Another batch of un-unwrappings
2020-01-02 17:02:46 +13:00
Jonathan Turner
aa577bf9bf
Clean up some unwraps (#1147) 2020-01-02 09:45:32 +13:00
Jonathan Turner
72838cc083
Move to using clippy (#1142)
* Clippy fixes

* Finish converting to use clippy

* fix warnings in new master

* fix windows

* fix windows

Co-authored-by: Artem Vorotnikov <artem@vorotnikov.me>
2019-12-31 20:36:08 +13:00
Andrés N. Robalino
0615adac94
Inc refactoring, Value helper test method extractions, and more integration helpers. (#1135)
* Manifests check. Ignore doctests for now.

* We continue with refactorings towards the separation of concerns between
crates. `nu_plugin_inc` and `nu_plugin_str` common test helpers usage
has been refactored into `nu-plugin` value test helpers.

Inc also uses the new API for integration tests.
2019-12-29 00:17:24 -05:00
Jonathan Turner
68a314b5cb UTF8 fix for twitter-reported issue 2019-12-27 19:03:00 +13:00
Jonathan Turner
314c3c4a97 Add missing descriptions and licenses to subcrates 2019-12-18 06:07:00 +13:00
Jonathan Turner
14817ef229 Subcrate versions 2019-12-18 05:18:10 +13:00
Jonathan Turner
98233dcec1 Subcrate versions 2019-12-18 05:09:53 +13:00
Andrés N. Robalino
87cc6d6f01 Separate internal and external command definitions. 2019-12-15 01:24:31 -05:00
Yehuda Katz
e8800fdd0c Remove the coloring_in_tokens feature flag
Stabilize and enable
2019-12-12 11:34:43 -08:00
Yehuda Katz
57af9b5040 Add Range and start Signature support
This commit contains two improvements:

- Support for a Range syntax (and a corresponding Range value)
- Work towards a signature syntax

Implementing the Range syntax resulted in cleaning up how operators in
the core syntax works. There are now two kinds of infix operators

- tight operators (`.` and `..`)
- loose operators

Tight operators may not be interspersed (`$it.left..$it.right` is a
syntax error). Loose operators require whitespace on both sides of the
operator, and can be arbitrarily interspersed. Precedence is left to
right in the core syntax.

Note that delimited syntax (like `( ... )` or `[ ... ]`) is a single
token node in the core syntax. A single token node can be parsed from
beginning to end in a context-free manner.

The rule for `.` is `<token node>.<member>`. The rule for `..` is
`<token node>..<token node>`.

Loose operators all have the same syntactic rule: `<token
node><space><loose op><space><token node>`.

The second aspect of this pull request is the beginning of support for a
signature syntax. Before implementing signatures, a necessary
prerequisite is for the core syntax to support multi-line programs.

That work establishes a few things:

- `;` and newlines are handled in the core grammar, and both count as
  "separators"
- line comments begin with `#` and continue until the end of the line

In this commit, multi-token productions in the core grammar can use
separators interchangably with spaces. However, I think we will
ultimately want a different rule preventing separators from occurring
before an infix operator, so that the end of a line is always
unambiguous. This would avoid gratuitous differences between modules and
repl usage.

We already effectively have this rule, because otherwise `x<newline> |
y` would be a single pipeline, but of course that wouldn't work.
2019-12-11 16:41:07 -08:00
Jonathan Turner
b6ba7f97fd WIP param completions 2019-12-08 18:58:53 +13:00
Jonathan Turner
871fc72892 Test all subcrates 2019-12-04 19:49:38 +13:00
Jonathan Turner
1fcf671ca4 Re-enable the textview plugin, now its own crate 2019-12-04 19:38:40 +13:00
Jonathan Turner
efc879b955 Add new line primitive, bump version, allow bare filepaths 2019-12-03 19:44:59 +13:00
Yehuda Katz
24bad78607 Clean up expansion of external words
Previously, external words accidentally used
ExpansionRule::new().allow_external_command(), when it should have been
ExpansionRule::new().allow_external_word().

External words are the broadest category in the parser, and are the
appropriate category for external arguments. This was just a mistake.
2019-12-02 16:34:33 -08:00
Yehuda Katz
87dbd3d5ac Extract build.rs 2019-12-02 13:14:51 -08:00
Yehuda Katz
4115634bfc Try to re-apply #1039 2019-12-02 11:02:58 -08:00
Jason Gedge
4e9afd6698 Refactor classified.rs into separate modules.
Adds modules for internal, external, and dynamic commands, as well as
the pipeline functionality. These are exported as their old names from
the classified module so as to keep its "interface" the same.
2019-12-02 11:02:57 -08:00
Belhorma Bendebiche
8f9dd6516e Add =~ and !~ operators on strings
`left =~ right` return true if left contains right, using Rust's
`String::contains`. `!~` is the negated version.

A new `apply_operator` function is added which decouples evaluation from
`Value::compare`. This returns a `Value` and opens the door to
implementing `+` for example, though it wouldn't be useful immediately.

The `operator!` macro had to be changed slightly as it would choke on
`~` in arguments.
2019-12-02 11:02:57 -08:00
Yehuda Katz
e4226def16 Extract core stuff into own crates
This commit extracts five new crates:

- nu-source, which contains the core source-code handling logic in Nu,
  including Text, Span, and also the pretty.rs-based debug logic
- nu-parser, which is the parser and expander logic
- nu-protocol, which is the bulk of the types and basic conveniences
  used by plugins
- nu-errors, which contains ShellError, ParseError and error handling
  conveniences
- nu-textview, which is the textview plugin extracted into a crate

One of the major consequences of this refactor is that it's no longer
possible to `impl X for Spanned<Y>` outside of the `nu-source` crate, so
a lot of types became more concrete (Value became a concrete type
instead of Spanned<Value>, for example).

This also turned a number of inherent methods in the main nu crate into
plain functions (impl Value {} became a bunch of functions in the
`value` namespace in `crate::data::value`).
2019-12-02 10:54:12 -08:00