80 lines
2.1 KiB
Rust
80 lines
2.1 KiB
Rust
use std::ops::DerefMut;
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use runtime::Runtime;
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use error::RuntimeError;
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use error::RuntimeErrorKind;
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use libimagstore::store::FileLockEntry;
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use libimagstore::store::Entry;
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use libimagerror::into::IntoError;
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pub type EditResult<T> = Result<T, RuntimeError>;
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pub trait Edit {
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fn edit_content(&mut self, rt: &Runtime) -> EditResult<()>;
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}
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impl Edit for String {
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fn edit_content(&mut self, rt: &Runtime) -> EditResult<()> {
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edit_in_tmpfile(rt, self).map(|_| ())
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}
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}
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impl Edit for Entry {
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fn edit_content(&mut self, rt: &Runtime) -> EditResult<()> {
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edit_in_tmpfile(rt, self.get_content_mut())
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.map(|_| ())
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}
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}
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impl<'a> Edit for FileLockEntry<'a> {
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fn edit_content(&mut self, rt: &Runtime) -> EditResult<()> {
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self.deref_mut().edit_content(rt)
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}
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}
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pub fn edit_in_tmpfile(rt: &Runtime, s: &mut String) -> EditResult<()> {
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use tempfile::NamedTempFile;
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use std::io::Seek;
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use std::io::Read;
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use std::io::SeekFrom;
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use std::io::Write;
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let file = try!(NamedTempFile::new());
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let file_path = file.path();
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let mut file = try!(file.reopen());
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try!(file.write_all(&s.clone().into_bytes()[..]));
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try!(file.sync_data());
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if let Some(mut editor) = rt.editor() {
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let exit_status = editor.arg(file_path).status();
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match exit_status.map(|s| s.success()).map_err(Box::new) {
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Ok(true) => {
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file.sync_data()
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.and_then(|_| file.seek(SeekFrom::Start(0)))
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.and_then(|_| {
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let mut new_s = String::new();
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let res = file.read_to_string(&mut new_s);
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*s = new_s;
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res
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})
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.map(|_| ())
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.map_err(Box::new)
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.map_err(|e| RuntimeErrorKind::IOError.into_error_with_cause(e))
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},
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Ok(false) => Err(RuntimeErrorKind::ProcessExitFailure.into()),
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Err(e) => Err(RuntimeErrorKind::IOError.into_error_with_cause(e)),
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}
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} else {
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Err(RuntimeErrorKind::Instantiate.into())
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}
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}
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