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27
book/src/commands.md
View File

@ -3,3 +3,30 @@ # Commands
Command mode can be activated by pressing `:`. The built-in commands are:
{{#include ./generated/typable-cmd.md}}
## Using variables in typed commands and mapped shortcuts
Helix provides several variables that can be used when typing commands or creating custom shortcuts. These variables are listed below:
| Variable | Description |
| --- | --- |
| `%{basename}` or `%{b}` | The name and extension of the currently focused file. |
| `%{dirname}` or `%{d}` | The absolute path of the parent directory of the currently focused file. |
| `%{cwd}` | The absolute path of the current working directory of Helix. |
| `%{repo}` | The absolute path of the VCS repository helix is opened in. Fallback to `cwd` if not inside a VCS repository|
| `%{filename}` or `%{f}` | The absolute path of the currently focused file. |
| `%{filename:rel}` | The relative path of the file according to `cwd` (will give absolute path if the file is not a child of the current working directory) |
| `%{filename:repo_rel}` | The relative path of the file according to `repo` (will give absolute path if the file is not a child of the VCS directory or the cwd) |
| `%{ext}` | The extension of the current file |
| `%{lang}` | The language of the current file |
| `%{linenumber}` | The line number where the primary cursor is positioned. |
| `%{cursorcolumn}` | The position of the primary cursor inside the current line. |
| `%{selection}` | The text selected by the primary cursor. |
| `%sh{cmd}` | Executes `cmd` with the default shell and returns the command output, if any. |
### Example
```toml
[keys.normal]
# Print blame info for the line where the main cursor is.
C-b = ":echo %sh{git blame -L %{linenumber} %{filename}}"
```

1
book/src/generated/typable-cmd.md
View File

@ -88,3 +88,4 @@
| `:move`, `:mv` | Move the current buffer and its corresponding file to a different path |
| `:yank-diagnostic` | Yank diagnostic(s) under primary cursor to register, or clipboard by default |
| `:read`, `:r` | Load a file into buffer |
| `:echo` | Print the processed input to the editor status |

207
helix-core/src/shellwords.rs
View File

@ -40,93 +40,120 @@ pub struct Shellwords<'a> {
impl<'a> From<&'a str> for Shellwords<'a> {
fn from(input: &'a str) -> Self {
use State::*;
let mut state = Unquoted;
let mut words = Vec::new();
let mut parts = Vec::new();
let mut escaped = String::with_capacity(input.len());
let mut inside_variable_expansion = false;
let mut nested_variable_expansion_count = 0;
let mut part_start = 0;
let mut unescaped_start = 0;
let mut end = 0;
for (i, c) in input.char_indices() {
state = match state {
OnWhitespace => match c {
'"' => {
end = i;
Dquoted
if c == '%' {
//%sh{this "should" be escaped}
if let Some(t) = input.get(i + 1..i + 3) {
if t == "sh" {
nested_variable_expansion_count += 1;
inside_variable_expansion = true;
}
'\'' => {
end = i;
Quoted
}
//%{this "should" be escaped}
if let Some(t) = input.get(i + 1..i + 2) {
if t == "{" {
nested_variable_expansion_count += 1;
inside_variable_expansion = true;
}
'\\' => {
if cfg!(unix) {
escaped.push_str(&input[unescaped_start..i]);
unescaped_start = i + 1;
UnquotedEscaped
} else {
OnWhitespace
}
}
c if c.is_ascii_whitespace() => {
end = i;
OnWhitespace
}
_ => Unquoted,
},
Unquoted => match c {
'\\' => {
if cfg!(unix) {
escaped.push_str(&input[unescaped_start..i]);
unescaped_start = i + 1;
UnquotedEscaped
} else {
Unquoted
}
}
c if c.is_ascii_whitespace() => {
end = i;
OnWhitespace
}
_ => Unquoted,
},
UnquotedEscaped => Unquoted,
Quoted => match c {
'\\' => {
if cfg!(unix) {
escaped.push_str(&input[unescaped_start..i]);
unescaped_start = i + 1;
QuoteEscaped
} else {
Quoted
}
}
'\'' => {
end = i;
OnWhitespace
}
_ => Quoted,
},
QuoteEscaped => Quoted,
Dquoted => match c {
'\\' => {
if cfg!(unix) {
escaped.push_str(&input[unescaped_start..i]);
unescaped_start = i + 1;
DquoteEscaped
} else {
}
}
if c == '}' {
nested_variable_expansion_count -= 1;
if nested_variable_expansion_count == 0 {
inside_variable_expansion = false;
}
}
state = if !inside_variable_expansion {
match state {
OnWhitespace => match c {
'"' => {
end = i;
Dquoted
}
}
'"' => {
end = i;
OnWhitespace
}
_ => Dquoted,
},
DquoteEscaped => Dquoted,
'\'' => {
end = i;
Quoted
}
'\\' => {
if cfg!(unix) {
escaped.push_str(&input[unescaped_start..i]);
unescaped_start = i + 1;
UnquotedEscaped
} else {
OnWhitespace
}
}
c if c.is_ascii_whitespace() => {
end = i;
OnWhitespace
}
_ => Unquoted,
},
Unquoted => match c {
'\\' => {
if cfg!(unix) {
escaped.push_str(&input[unescaped_start..i]);
unescaped_start = i + 1;
UnquotedEscaped
} else {
Unquoted
}
}
c if c.is_ascii_whitespace() => {
end = i;
OnWhitespace
}
_ => Unquoted,
},
UnquotedEscaped => Unquoted,
Quoted => match c {
'\\' => {
if cfg!(unix) {
escaped.push_str(&input[unescaped_start..i]);
unescaped_start = i + 1;
QuoteEscaped
} else {
Quoted
}
}
'\'' => {
end = i;
OnWhitespace
}
_ => Quoted,
},
QuoteEscaped => Quoted,
Dquoted => match c {
'\\' => {
if cfg!(unix) {
escaped.push_str(&input[unescaped_start..i]);
unescaped_start = i + 1;
DquoteEscaped
} else {
Dquoted
}
}
'"' => {
end = i;
OnWhitespace
}
_ => Dquoted,
},
DquoteEscaped => Dquoted,
}
} else {
state
};
let c_len = c.len_utf8();
@ -235,6 +262,38 @@ fn test_normal() {
// TODO test is_owned and is_borrowed, once they get stabilized.
assert_eq!(expected, result);
}
#[test]
fn test_expansion() {
let input = r#"echo %{filename} %{linenumber}"#;
let shellwords = Shellwords::from(input);
let result = shellwords.words().to_vec();
let expected = vec![
Cow::from("echo"),
Cow::from("%{filename}"),
Cow::from("%{linenumber}"),
];
assert_eq!(expected, result);
let input = r#"echo %{filename} 'world' %{something to 'escape}"#;
let shellwords = Shellwords::from(input);
let result = shellwords.words().to_vec();
let expected = vec![
Cow::from("echo"),
Cow::from("%{filename}"),
Cow::from("world"),
Cow::from("%{something to 'escape}"),
];
assert_eq!(expected, result);
let input = r#"echo %sh{%sh{%{filename}}} cool"#;
let shellwords = Shellwords::from(input);
let result = shellwords.words().to_vec();
let expected = vec![
Cow::from("echo"),
Cow::from("%sh{%sh{%{filename}}}"),
Cow::from("cool"),
];
assert_eq!(expected, result);
}
#[test]
#[cfg(unix)]

17
helix-term/src/commands.rs
View File

@ -226,13 +226,28 @@ pub fn execute(&self, cx: &mut Context) {
match &self {
Self::Typable { name, args, doc: _ } => {
let args: Vec<Cow<str>> = args.iter().map(Cow::from).collect();
let mut joined_args = args.join(" ");
let expanded_args = match args.len() {
0 => vec![],
_ => {
if let Ok(expanded) = cx.editor.expand_variable_in_string(&joined_args) {
joined_args = expanded.to_string();
joined_args.split(' ').map(Cow::from).collect()
} else {
args
}
}
};
if let Some(command) = typed::TYPABLE_COMMAND_MAP.get(name.as_str()) {
let mut cx = compositor::Context {
editor: cx.editor,
jobs: cx.jobs,
scroll: None,
};
if let Err(e) = (command.fun)(&mut cx, &args[..], PromptEvent::Validate) {
if let Err(e) =
(command.fun)(&mut cx, &expanded_args[..], PromptEvent::Validate)
{
cx.editor.set_error(format!("{}", e));
}
}

33
helix-term/src/commands/typed.rs
View File

@ -2520,6 +2520,18 @@ fn read(cx: &mut compositor::Context, args: &[Cow<str>], event: PromptEvent) ->
Ok(())
}
fn echo(cx: &mut compositor::Context, args: &[Cow<str>], event: PromptEvent) -> anyhow::Result<()> {
if event != PromptEvent::Validate {
return Ok(());
}
let args = args.join(" ");
cx.editor.set_status(args);
Ok(())
}
pub const TYPABLE_COMMAND_LIST: &[TypableCommand] = &[
TypableCommand {
name: "quit",
@ -3141,6 +3153,13 @@ fn read(cx: &mut compositor::Context, args: &[Cow<str>], event: PromptEvent) ->
fun: read,
signature: CommandSignature::positional(&[completers::filename]),
},
TypableCommand {
name: "echo",
aliases: &[],
doc: "Print the processed input to the editor status",
fun: echo,
signature: CommandSignature::none()
},
];
pub static TYPABLE_COMMAND_MAP: Lazy<HashMap<&'static str, &'static TypableCommand>> =
@ -3220,8 +3239,18 @@ pub(super) fn command_mode(cx: &mut Context) {
// Handle typable commands
if let Some(cmd) = typed::TYPABLE_COMMAND_MAP.get(parts[0]) {
let shellwords = Shellwords::from(input);
let args = shellwords.words();
let words = shellwords.words().to_vec();
let args = if event == PromptEvent::Validate {
match cx.editor.expand_variables_in_vec(&words) {
Ok(args) => args,
Err(e) => {
cx.editor.set_error(format!("{}", e));
return;
}
}
} else {
words
};
if let Err(e) = (cmd.fun)(cx, &args[1..], event) {
cx.editor.set_error(format!("{}", e));
}

1
helix-term/tests/test/commands.rs
View File

@ -3,6 +3,7 @@
use super::*;
mod movement;
mod variable_expansion;
mod write;
#[tokio::test(flavor = "multi_thread")]

183
helix-term/tests/test/commands/variable_expansion.rs Normal file
View File

@ -0,0 +1,183 @@
use super::*;
use std::borrow::Cow;
#[tokio::test(flavor = "multi_thread")]
async fn test_variable_expansion() -> anyhow::Result<()> {
{
let mut app = AppBuilder::new().build()?;
test_key_sequence(
&mut app,
Some("<esc>:echo %{filename}<ret>"),
Some(&|app| {
assert_eq!(
app.editor.get_status().unwrap().0,
helix_view::document::SCRATCH_BUFFER_NAME
);
}),
false,
)
.await?;
let mut app = AppBuilder::new().build()?;
test_key_sequence(
&mut app,
Some("<esc>:echo %{basename}<ret>"),
Some(&|app| {
assert_eq!(
app.editor.get_status().unwrap().0,
helix_view::document::SCRATCH_BUFFER_NAME
);
}),
false,
)
.await?;
let mut app = AppBuilder::new().build()?;
test_key_sequence(
&mut app,
Some("<esc>:echo %{dirname}<ret>"),
Some(&|app| {
assert_eq!(
app.editor.get_status().unwrap().0,
helix_view::document::SCRATCH_BUFFER_NAME
);
}),
false,
)
.await?;
}
{
let file = tempfile::NamedTempFile::new()?;
let mut app = AppBuilder::new().with_file(file.path(), None).build()?;
test_key_sequence(
&mut app,
Some("<esc>:echo %{filename}<ret>"),
Some(&|app| {
assert_eq!(
app.editor.get_status().unwrap().0,
helix_stdx::path::canonicalize(file.path())
.to_str()
.unwrap()
);
}),
false,
)
.await?;
let mut app = AppBuilder::new().with_file(file.path(), None).build()?;
test_key_sequence(
&mut app,
Some("<esc>:echo %{basename}<ret>"),
Some(&|app| {
assert_eq!(
app.editor.get_status().unwrap().0,
file.path().file_name().unwrap().to_str().unwrap()
);
}),
false,
)
.await?;
let mut app = AppBuilder::new().with_file(file.path(), None).build()?;
test_key_sequence(
&mut app,
Some("<esc>:echo %{dirname}<ret>"),
Some(&|app| {
assert_eq!(
app.editor.get_status().unwrap().0,
helix_stdx::path::canonicalize(file.path().parent().unwrap())
.to_str()
.unwrap()
);
}),
false,
)
.await?;
}
{
let file = tempfile::NamedTempFile::new()?;
let mut app = AppBuilder::new().with_file(file.path(), None).build()?;
test_key_sequence(
&mut app,
Some("ihelix<esc>%:echo %{selection}<ret>"),
Some(&|app| {
assert_eq!(app.editor.get_status().unwrap().0, "helix");
}),
false,
)
.await?;
}
{
let file = tempfile::NamedTempFile::new()?;
let mut app = AppBuilder::new().with_file(file.path(), None).build()?;
test_key_sequence(
&mut app,
Some("ihelix<ret>helix<ret>helix<ret><esc>:echo %{linenumber}<ret>"),
Some(&|app| {
assert_eq!(app.editor.get_status().unwrap().0, "4");
}),
false,
)
.await?;
let mut app = AppBuilder::new().build()?;
test_key_sequence(
&mut app,
Some("<esc>:echo %sh{echo %{filename}}<ret>"),
Some(&|app| {
assert_eq!(
app.editor.get_status().unwrap().0,
helix_view::document::SCRATCH_BUFFER_NAME
);
}),
false,
)
.await?;
let mut app = AppBuilder::new().build()?;
test_key_sequence(
&mut app,
Some("<esc>:echo %sh{echo %{filename} %{linenumber}}<ret>"),
Some(&|app| {
assert_eq!(
app.editor.get_status().unwrap().0,
&Cow::from(format!(
"{} {}",
helix_view::document::SCRATCH_BUFFER_NAME,
1
))
);
}),
false,
)
.await?;
let mut app = AppBuilder::new().build()?;
test_key_sequence(
&mut app,
Some("<esc>:echo %sh{echo %{filename} %sh{echo %{filename}}}<ret>"),
Some(&|app| {
assert_eq!(
app.editor.get_status().unwrap().0,
&Cow::from(format!(
"{} {}",
helix_view::document::SCRATCH_BUFFER_NAME,
helix_view::document::SCRATCH_BUFFER_NAME
))
);
}),
false,
)
.await?;
}
Ok(())
}

2
helix-view/src/editor.rs
View File

@ -1,3 +1,5 @@
mod variable_expansion;
use crate::{
annotations::diagnostics::{DiagnosticFilter, InlineDiagnosticsConfig},
clipboard::ClipboardProvider,

204
helix-view/src/editor/variable_expansion.rs Normal file
View File

@ -0,0 +1,204 @@
use helix_core::coords_at_pos;
use crate::Editor;
use std::borrow::Cow;
impl Editor {
pub fn expand_variables_in_vec<'a>(
&self,
args: &'a Vec<Cow<'a, str>>,
) -> anyhow::Result<Vec<Cow<'a, str>>> {
let mut output = Vec::with_capacity(args.len());
for arg in args {
if let Ok(s) = self.expand_variable_in_string(arg) {
output.push(s);
}
}
Ok(output)
}
pub fn expand_variable_in_string<'a>(&self, input: &'a str) -> anyhow::Result<Cow<'a, str>> {
let (view, doc) = current_ref!(self);
let shell = &self.config().shell;
let mut output: Option<String> = None;
let mut chars = input.char_indices();
let mut last_push_end: usize = 0;
while let Some((index, char)) = chars.next() {
if char == '%' {
if let Some((_, char)) = chars.next() {
if char == '{' {
for (end, char) in chars.by_ref() {
if char == '}' {
if output.is_none() {
output = Some(String::with_capacity(input.len()))
}
if let Some(o) = output.as_mut() {
o.push_str(&input[last_push_end..index]);
last_push_end = end + 1;
let value = match &input[index + 2..end] {
"basename" | "b" => doc
.path()
.and_then(|it| {
it.file_name().and_then(|it| it.to_str())
})
.unwrap_or(crate::document::SCRATCH_BUFFER_NAME)
.to_owned(),
"filename" | "f" => doc
.path()
.and_then(|it| it.to_str())
.unwrap_or(crate::document::SCRATCH_BUFFER_NAME)
.to_owned(),
"filename:repo_rel" => {
// This will get repo root or cwd if not inside a git repo.
let workspace_path = helix_loader::find_workspace().0;
doc.path()
.and_then(|p| {
p.strip_prefix(workspace_path)
.unwrap_or(p)
.to_str()
})
.unwrap_or(crate::document::SCRATCH_BUFFER_NAME)
.to_owned()
}
"filename:rel" => {
let cwd = helix_stdx::env::current_working_dir();
doc.path()
.and_then(|p| {
p.strip_prefix(cwd).unwrap_or(p).to_str()
})
.unwrap_or(crate::document::SCRATCH_BUFFER_NAME)
.to_owned()
}
"dirname" | "d" => doc
.path()
.and_then(|p| p.parent())
.and_then(std::path::Path::to_str)
.unwrap_or(crate::document::SCRATCH_BUFFER_NAME)
.to_owned(),
"repo" => helix_loader::find_workspace()
.0
.to_str()
.unwrap_or("")
.to_owned(),
"cwd" => helix_stdx::env::current_working_dir()
.to_str()
.unwrap()
.to_owned(),
"linenumber" => (doc
.selection(view.id)
.primary()
.cursor_line(doc.text().slice(..))
+ 1)
.to_string(),
"cursorcolumn" => (coords_at_pos(
doc.text().slice(..),
doc.selection(view.id)
.primary()
.cursor(doc.text().slice(..)),
)
.col + 1)
.to_string(),
"lang" => doc.language_name().unwrap_or("text").to_string(),
"ext" => doc
.relative_path()
.and_then(|p| {
p.extension()?.to_os_string().into_string().ok()
})
.unwrap_or_default(),
"selection" => doc
.selection(view.id)
.primary()
.fragment(doc.text().slice(..))
.to_string(),
_ => anyhow::bail!("Unknown variable"),
};
o.push_str(value.trim());
break;
}
}
}
} else if char == 's' {
if let (Some((_, 'h')), Some((_, '{'))) = (chars.next(), chars.next()) {
let mut right_bracket_remaining = 1;
for (end, char) in chars.by_ref() {
if char == '}' {
right_bracket_remaining -= 1;
if right_bracket_remaining == 0 {
if output.is_none() {
output = Some(String::with_capacity(input.len()))
}
if let Some(o) = output.as_mut() {
let body = self.expand_variable_in_string(
&input[index + 4..end],
)?;
let output = tokio::task::block_in_place(move || {
helix_lsp::block_on(async move {
let mut command =
tokio::process::Command::new(&shell[0]);
command.args(&shell[1..]).arg(&body[..]);
let output =
command.output().await.map_err(|_| {
anyhow::anyhow!(
"Shell command failed: {body}"
)
})?;
if output.status.success() {
String::from_utf8(output.stdout).map_err(
|_| {
anyhow::anyhow!(
"Process did not output valid UTF-8"
)
},
)
} else if output.stderr.is_empty() {
Err(anyhow::anyhow!(
"Shell command failed: {body}"
))
} else {
let stderr =
String::from_utf8_lossy(&output.stderr);
Err(anyhow::anyhow!("{stderr}"))
}
})
});
o.push_str(&input[last_push_end..index]);
last_push_end = end + 1;
o.push_str(output?.trim());
break;
}
}
} else if char == '{' {
right_bracket_remaining += 1;
}
}
}
}
}
}
}
if let Some(o) = output.as_mut() {
o.push_str(&input[last_push_end..]);
}
match output {
Some(o) => Ok(Cow::Owned(o)),
None => Ok(Cow::Borrowed(input)),
}
}
}