66 lines
1.8 KiB
Rust
66 lines
1.8 KiB
Rust
use std::process::{Command, Stdio};
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use std::io::{Read, Write, Seek};
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use tempfile::NamedTempFile;
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use crate::error::{Error::*, Result};
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/// Launches the specified editor editing a temporary file and returns the
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/// contents written by the user.
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///
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/// If prev_contents is Some(s) then the temporary file is started with those
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/// contents.
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pub fn get_string(note_editor: Option<&str>, prev_contents: Option<String>) -> Result<String> {
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let note_editor = if let Some(note_editor) = note_editor {
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note_editor.to_owned()
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} else if let Ok(editor_env) = std::env::var("EDITOR") {
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editor_env
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} else {
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return Err(EditorIsEmpty);
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};
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let parts: Vec<_> = note_editor.split(' ').filter(|p| !p.is_empty()).collect();
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let editor = if let Some(name) = parts.first() {
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name.to_owned()
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} else {
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return Err(EditorIsEmpty);
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};
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let mut c = Command::new(editor);
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if parts.len() > 1 {
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for part in &parts[1..] {
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c.arg(part);
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}
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}
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let mut tmpfile = NamedTempFile::new().map_err(|e| NoTmpFile(e.to_string()))?;
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if let Some(contents) = prev_contents {
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tmpfile.write_all(contents.as_bytes())?;
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tmpfile.rewind()?;
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}
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c.arg(tmpfile.as_ref());
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let status = c
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.stdin(Stdio::inherit())
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.stdout(Stdio::inherit())
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.stderr(Stdio::inherit())
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.output().map_err(|e| EditorFailed {
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editor: note_editor.clone(),
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error: e.to_string(),
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})?
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.status;
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if status.success() {
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let mut note = String::new();
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tmpfile.read_to_string(&mut note).map_err(|e| CouldntReadTmpFile(e.to_string()))?;
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Ok(note.trim().to_owned())
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} else {
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Err(EditorFailed { editor: note_editor.clone(), error: status.to_string() })
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}
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}
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