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adding variable expansion (impl + docs + test)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,194 @@ | ||
| use std::borrow::Cow; | ||
|
|
||
| use anyhow::Result; | ||
| use helix_core::coords_at_pos; | ||
| use helix_view::Editor; | ||
|
|
||
| pub fn expand_args<'a>( | ||
| editor: &Editor, | ||
| input: Cow<'a, str>, | ||
| expand_sh: bool, | ||
| ) -> Result<Cow<'a, str>> { | ||
| let (view, doc) = current_ref!(editor); | ||
| let shell = &editor.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::helix_view::document::SCRATCH_BUFFER_NAME) | ||
| .to_owned(), | ||
| "filename" | "f" => doc | ||
| .path() | ||
| .and_then(|it| it.to_str()) | ||
| .unwrap_or(crate::helix_view::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::helix_view::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::helix_view::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::helix_view::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' && expand_sh { | ||
| 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 = expand_args( | ||
| editor, | ||
| Cow::Borrowed(&input[index + 4..end]), | ||
| expand_sh, | ||
| )?; | ||
|
|
||
| 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(input), | ||
| } | ||
| } |
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