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organic/src/util/cli.rs

192 lines
5.6 KiB
Rust

use std::path::Path;
use tokio::process::Command;
use crate::settings::GlobalSettings;
use crate::settings::HeadlineLevelFilter;
pub async fn print_versions() -> Result<(), Box<dyn std::error::Error>> {
eprintln!("Using emacs version: {}", get_emacs_version().await?.trim());
eprintln!(
"Using org-mode version: {}",
get_org_mode_version().await?.trim()
);
Ok(())
}
pub(crate) async fn get_emacs_version() -> Result<String, Box<dyn std::error::Error>> {
let elisp_script = r#"(progn
(message "%s" (version))
)"#;
let mut cmd = Command::new("emacs");
let cmd = cmd
.arg("-q")
.arg("--no-site-file")
.arg("--no-splash")
.arg("--batch")
.arg("--eval")
.arg(elisp_script);
let out = cmd.output().await?;
out.status.exit_ok()?;
Ok(String::from_utf8(out.stderr)?)
}
pub(crate) async fn get_org_mode_version() -> Result<String, Box<dyn std::error::Error>> {
let elisp_script = r#"(progn
(org-mode)
(message "%s" (org-version nil t nil))
)"#;
let mut cmd = Command::new("emacs");
let cmd = cmd
.arg("-q")
.arg("--no-site-file")
.arg("--no-splash")
.arg("--batch")
.arg("--eval")
.arg(elisp_script);
let out = cmd.output().await?;
out.status.exit_ok()?;
Ok(String::from_utf8(out.stderr)?)
}
pub(crate) async fn emacs_parse_anonymous_org_document<'g, 's, C>(
file_contents: C,
global_settings: &GlobalSettings<'g, 's>,
) -> Result<String, Box<dyn std::error::Error>>
where
C: AsRef<str>,
{
let escaped_file_contents = escape_elisp_string(file_contents);
let elisp_script = format!(
r#"(progn
(erase-buffer)
(require 'org)
(defun org-table-align () t)
(insert "{escaped_file_contents}")
{global_settings}
(org-mode)
(message "%s" (pp-to-string (org-element-parse-buffer)))
)"#,
escaped_file_contents = escaped_file_contents,
global_settings = global_settings_elisp(global_settings)
);
let mut cmd = Command::new("emacs");
let cmd = cmd
.arg("-q")
.arg("--no-site-file")
.arg("--no-splash")
.arg("--batch")
.arg("--eval")
.arg(elisp_script);
let out = cmd.output().await?;
let status = out.status.exit_ok();
if status.is_err() {
eprintln!(
"Emacs errored out: {}\n{}",
String::from_utf8(out.stdout)?,
String::from_utf8(out.stderr)?
);
status?;
unreachable!();
}
let org_sexp = out.stderr;
Ok(String::from_utf8(org_sexp)?)
}
pub(crate) async fn emacs_parse_file_org_document<'g, 's, P>(
file_path: P,
global_settings: &GlobalSettings<'g, 's>,
) -> Result<String, Box<dyn std::error::Error>>
where
P: AsRef<Path>,
{
let file_path = file_path.as_ref().canonicalize()?;
let containing_directory = file_path.parent().ok_or(format!(
"Failed to get containing directory for path {}",
file_path.display()
))?;
let elisp_script = format!(
r#"(progn
(require 'org)
(defun org-table-align () t)
(setq vc-handled-backends nil)
{global_settings}
(find-file-read-only "{file_path}")
(org-mode)
(message "%s" (pp-to-string (org-element-parse-buffer)))
)"#,
global_settings = global_settings_elisp(global_settings),
file_path = file_path
.as_os_str()
.to_str()
.expect("File name should be valid utf-8.")
);
let mut cmd = Command::new("emacs");
let cmd = cmd
.current_dir(containing_directory)
.arg("-q")
.arg("--no-site-file")
.arg("--no-splash")
.arg("--batch")
.arg("--eval")
.arg(elisp_script);
let out = cmd.output().await?;
let status = out.status.exit_ok();
if status.is_err() {
eprintln!(
"Emacs errored out: {}\n{}",
String::from_utf8(out.stdout)?,
String::from_utf8(out.stderr)?
);
status?;
unreachable!();
}
let org_sexp = out.stderr;
Ok(String::from_utf8(org_sexp)?)
}
fn escape_elisp_string<C>(file_contents: C) -> String
where
C: AsRef<str>,
{
let source = file_contents.as_ref();
let source_len = source.len();
// We allocate a string 10% larger than the source to account for escape characters. Without this, we would have more allocations during processing.
let mut output = String::with_capacity(source_len + (source_len / 10));
for c in source.chars() {
match c {
'"' | '\\' => {
output.push('\\');
output.push(c);
}
_ => {
output.push(c);
}
}
}
output
}
/// Generate elisp to configure org-mode parsing settings
///
/// Currently only org-list-allow-alphabetical is supported.
fn global_settings_elisp(global_settings: &GlobalSettings) -> String {
// This string concatenation is wildly inefficient but its only called in tests 🤷.
let mut ret = "".to_owned();
if global_settings.list_allow_alphabetical {
ret += "(setq org-list-allow-alphabetical t)\n"
}
if global_settings.tab_width != crate::settings::DEFAULT_TAB_WIDTH {
ret += format!("(setq-default tab-width {})", global_settings.tab_width).as_str();
}
if global_settings.odd_levels_only != HeadlineLevelFilter::default() {
ret += match global_settings.odd_levels_only {
HeadlineLevelFilter::Odd => "(setq org-odd-levels-only t)\n",
HeadlineLevelFilter::OddEven => "(setq org-odd-levels-only nil)\n",
};
}
ret
}