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annotate rust/hg-cpython/src/exceptions.rs @ 47379:f6bb181c75f8

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rust: Parse "subinclude"d files along the way, not later When parsing a `.hgignore` file and encountering an `include:` line, the included file is parsed recursively right then in a depth-first fashion. With `subinclude:` however included files were parsed (recursively) much later. This changes it to be expanded during parsing, like `.hgignore`. The motivation for this is an upcoming changeset that needs to detect changes in which files are ignored or not. The plan is to hash all ignore files while they are being read, and store that hash in the dirstate (in v2 format). In order to allow a potential alternative implementations to read that format, the algorithm to compute that hash must be documented. Having a well-defined depth-first ordering for the tree of (sub-)included files makes that easier. Differential Revision: https://phab.mercurial-scm.org/D10834
author Simon Sapin <simon.sapin@octobus.net>
date Wed, 02 Jun 2021 18:03:43 +0200
parents f96b28aa4b79
children 35ebe6f824be
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 // ancestors.rs
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2 //
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3 // Copyright 2018 Georges Racinet <gracinet@anybox.fr>
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4 //
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5 // This software may be used and distributed according to the terms of the
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6 // GNU General Public License version 2 or any later version.
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7
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8 //! Bindings for Rust errors
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9 //!
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10 //! [`GraphError`] exposes `hg::GraphError` as a subclass of `ValueError`
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11 //! but some variants of `hg::GraphError` can be converted directly to other
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12 //! existing Python exceptions if appropriate.
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13 //!
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14 //! [`GraphError`]: struct.GraphError.html
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15 use cpython::{
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16 exc::{RuntimeError, ValueError},
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17 py_exception, PyErr, Python,
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18 };
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19 use hg;
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20
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21 py_exception!(rustext, GraphError, ValueError);
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22
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23 impl GraphError {
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24 pub fn pynew(py: Python, inner: hg::GraphError) -> PyErr {
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25 match inner {
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26 hg::GraphError::ParentOutOfRange(r) => {
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27 GraphError::new(py, ("ParentOutOfRange", r))
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28 }
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29 hg::GraphError::WorkingDirectoryUnsupported => {
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30 match py
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31 .import("mercurial.error")
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32 .and_then(|m| m.get(py, "WdirUnsupported"))
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33 {
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34 Err(e) => e,
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35 Ok(cls) => PyErr::from_instance(py, cls),
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36 }
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37 }
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38 }
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39 }
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40 }
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41
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42 py_exception!(rustext, HgPathPyError, RuntimeError);
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43 py_exception!(rustext, FallbackError, RuntimeError);
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44 py_exception!(shared_ref, AlreadyBorrowed, RuntimeError);