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use crate::errors::HgError;
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use std::convert::TryFrom;
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#[derive(Copy, Clone, Debug, Eq, PartialEq)]
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pub enum EntryState {
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Normal,
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Added,
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Removed,
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Merged,
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Unknown,
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}
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/// The C implementation uses all signed types. This will be an issue
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/// either when 4GB+ source files are commonplace or in 2038, whichever
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/// comes first.
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#[derive(Debug, PartialEq, Copy, Clone)]
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pub struct DirstateEntry {
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pub state: EntryState,
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pub mode: i32,
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pub mtime: i32,
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pub size: i32,
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}
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pub const V1_RANGEMASK: i32 = 0x7FFFFFFF;
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pub const MTIME_UNSET: i32 = -1;
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/// A `DirstateEntry` with a size of `-2` means that it was merged from the
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/// other parent. This allows revert to pick the right status back during a
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/// merge.
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pub const SIZE_FROM_OTHER_PARENT: i32 = -2;
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/// A special value used for internal representation of special case in
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/// dirstate v1 format.
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pub const SIZE_NON_NORMAL: i32 = -1;
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impl DirstateEntry {
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pub fn is_non_normal(&self) -> bool {
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self.state != EntryState::Normal || self.mtime == MTIME_UNSET
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}
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pub fn is_from_other_parent(&self) -> bool {
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self.state == EntryState::Normal && self.size == SIZE_FROM_OTHER_PARENT
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}
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// TODO: other platforms
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#[cfg(unix)]
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pub fn mode_changed(
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&self,
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filesystem_metadata: &std::fs::Metadata,
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) -> bool {
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use std::os::unix::fs::MetadataExt;
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const EXEC_BIT_MASK: u32 = 0o100;
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let dirstate_exec_bit = (self.mode as u32) & EXEC_BIT_MASK;
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let fs_exec_bit = filesystem_metadata.mode() & EXEC_BIT_MASK;
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dirstate_exec_bit != fs_exec_bit
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}
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/// Returns a `(state, mode, size, mtime)` tuple as for
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/// `DirstateMapMethods::debug_iter`.
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pub fn debug_tuple(&self) -> (u8, i32, i32, i32) {
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(self.state.into(), self.mode, self.size, self.mtime)
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}
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pub fn mtime_is_ambiguous(&self, now: i32) -> bool {
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self.state == EntryState::Normal && self.mtime == now
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}
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pub fn clear_ambiguous_mtime(&mut self, now: i32) -> bool {
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let ambiguous = self.mtime_is_ambiguous(now);
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if ambiguous {
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// The file was last modified "simultaneously" with the current
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// write to dirstate (i.e. within the same second for file-
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// systems with a granularity of 1 sec). This commonly happens
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// for at least a couple of files on 'update'.
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// The user could change the file without changing its size
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// within the same second. Invalidate the file's mtime in
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// dirstate, forcing future 'status' calls to compare the
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// contents of the file if the size is the same. This prevents
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// mistakenly treating such files as clean.
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self.clear_mtime()
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}
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ambiguous
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}
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pub fn clear_mtime(&mut self) {
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self.mtime = -1;
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}
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}
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impl EntryState {
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pub fn is_tracked(self) -> bool {
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use EntryState::*;
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match self {
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Normal | Added | Merged => true,
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Removed | Unknown => false,
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}
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}
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}
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impl TryFrom<u8> for EntryState {
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type Error = HgError;
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fn try_from(value: u8) -> Result<Self, Self::Error> {
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match value {
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b'n' => Ok(EntryState::Normal),
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b'a' => Ok(EntryState::Added),
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b'r' => Ok(EntryState::Removed),
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b'm' => Ok(EntryState::Merged),
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b'?' => Ok(EntryState::Unknown),
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_ => Err(HgError::CorruptedRepository(format!(
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"Incorrect dirstate entry state {}",
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value
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))),
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}
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}
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}
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impl Into<u8> for EntryState {
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fn into(self) -> u8 {
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match self {
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EntryState::Normal => b'n',
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EntryState::Added => b'a',
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EntryState::Removed => b'r',
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EntryState::Merged => b'm',
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EntryState::Unknown => b'?',
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}
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}
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}
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