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use crate::errors::HgError;
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use bitflags::bitflags;
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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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}
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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(crate) flags: Flags,
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mode_size: Option<(i32, i32)>,
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mtime: Option<i32>,
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}
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bitflags! {
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pub(crate) struct Flags: u8 {
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const WDIR_TRACKED = 1 << 0;
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const P1_TRACKED = 1 << 1;
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const P2_INFO = 1 << 2;
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}
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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 from_v2_data(
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wdir_tracked: bool,
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p1_tracked: bool,
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p2_info: bool,
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mode_size: Option<(i32, i32)>,
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mtime: Option<i32>,
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) -> Self {
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let mut flags = Flags::empty();
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flags.set(Flags::WDIR_TRACKED, wdir_tracked);
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flags.set(Flags::P1_TRACKED, p1_tracked);
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flags.set(Flags::P2_INFO, p2_info);
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Self {
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flags,
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mode_size,
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mtime,
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}
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}
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pub fn from_v1_data(
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state: EntryState,
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mode: i32,
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size: i32,
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mtime: i32,
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) -> Self {
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match state {
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EntryState::Normal => {
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if size == SIZE_FROM_OTHER_PARENT {
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Self {
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// might be missing P1_TRACKED
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flags: Flags::WDIR_TRACKED | Flags::P2_INFO,
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mode_size: None,
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mtime: None,
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}
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} else if size == SIZE_NON_NORMAL {
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Self::new_possibly_dirty()
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} else if mtime == MTIME_UNSET {
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Self {
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flags: Flags::WDIR_TRACKED | Flags::P1_TRACKED,
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mode_size: Some((mode, size)),
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mtime: None,
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}
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} else {
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Self::new_normal(mode, size, mtime)
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}
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}
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EntryState::Added => Self {
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flags: Flags::WDIR_TRACKED,
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mode_size: None,
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mtime: None,
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},
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EntryState::Removed => Self {
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flags: if size == SIZE_NON_NORMAL {
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Flags::P1_TRACKED | Flags::P2_INFO
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} else if size == SIZE_FROM_OTHER_PARENT {
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// We don’t know if P1_TRACKED should be set (file history)
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Flags::P2_INFO
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} else {
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Flags::P1_TRACKED
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},
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mode_size: None,
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mtime: None,
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},
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EntryState::Merged => Self {
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flags: Flags::WDIR_TRACKED
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| Flags::P1_TRACKED // might not be true because of rename ?
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| Flags::P2_INFO, // might not be true because of rename ?
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mode_size: None,
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mtime: None,
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},
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}
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}
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pub fn new_possibly_dirty() -> Self {
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Self {
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flags: Flags::WDIR_TRACKED | Flags::P1_TRACKED,
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mode_size: None,
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mtime: None,
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}
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}
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pub fn new_normal(mode: i32, size: i32, mtime: i32) -> Self {
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Self {
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flags: Flags::WDIR_TRACKED | Flags::P1_TRACKED,
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mode_size: Some((mode, size)),
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mtime: Some(mtime),
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}
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}
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/// Creates a new entry in "removed" state.
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///
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/// `size` is expected to be zero, `SIZE_NON_NORMAL`, or
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/// `SIZE_FROM_OTHER_PARENT`
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pub fn new_removed(size: i32) -> Self {
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Self::from_v1_data(EntryState::Removed, 0, size, 0)
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}
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pub fn tracked(&self) -> bool {
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self.flags.contains(Flags::WDIR_TRACKED)
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}
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pub fn p1_tracked(&self) -> bool {
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self.flags.contains(Flags::P1_TRACKED)
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}
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fn in_either_parent(&self) -> bool {
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self.flags.intersects(Flags::P1_TRACKED | Flags::P2_INFO)
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}
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pub fn removed(&self) -> bool {
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self.in_either_parent() && !self.flags.contains(Flags::WDIR_TRACKED)
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}
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pub fn p2_info(&self) -> bool {
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self.flags.contains(Flags::WDIR_TRACKED | Flags::P2_INFO)
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}
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pub fn added(&self) -> bool {
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self.flags.contains(Flags::WDIR_TRACKED) && !self.in_either_parent()
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}
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pub fn maybe_clean(&self) -> bool {
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if !self.flags.contains(Flags::WDIR_TRACKED) {
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false
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} else if !self.flags.contains(Flags::P1_TRACKED) {
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false
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} else if self.flags.contains(Flags::P2_INFO) {
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false
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} else {
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true
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}
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}
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pub fn any_tracked(&self) -> bool {
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self.flags.intersects(
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Flags::WDIR_TRACKED | Flags::P1_TRACKED | Flags::P2_INFO,
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)
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}
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/// Returns `(wdir_tracked, p1_tracked, p2_info, mode_size, mtime)`
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pub(crate) fn v2_data(
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&self,
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) -> (bool, bool, bool, Option<(i32, i32)>, Option<i32>) {
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if !self.any_tracked() {
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// TODO: return an Option instead?
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panic!("Accessing v1_state of an untracked DirstateEntry")
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}
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let wdir_tracked = self.flags.contains(Flags::WDIR_TRACKED);
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let p1_tracked = self.flags.contains(Flags::P1_TRACKED);
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let p2_info = self.flags.contains(Flags::P2_INFO);
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let mode_size = self.mode_size;
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let mtime = self.mtime;
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(wdir_tracked, p1_tracked, p2_info, mode_size, mtime)
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}
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fn v1_state(&self) -> EntryState {
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if !self.any_tracked() {
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// TODO: return an Option instead?
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panic!("Accessing v1_state of an untracked DirstateEntry")
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}
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if self.removed() {
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EntryState::Removed
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} else if self
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.flags
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.contains(Flags::WDIR_TRACKED | Flags::P1_TRACKED | Flags::P2_INFO)
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{
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EntryState::Merged
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} else if self.added() {
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EntryState::Added
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} else {
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EntryState::Normal
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}
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}
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fn v1_mode(&self) -> i32 {
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if let Some((mode, _size)) = self.mode_size {
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mode
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} else {
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0
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}
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}
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fn v1_size(&self) -> i32 {
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if !self.any_tracked() {
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// TODO: return an Option instead?
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panic!("Accessing v1_size of an untracked DirstateEntry")
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}
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if self.removed()
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&& self.flags.contains(Flags::P1_TRACKED | Flags::P2_INFO)
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{
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SIZE_NON_NORMAL
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} else if self.flags.contains(Flags::P2_INFO) {
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SIZE_FROM_OTHER_PARENT
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} else if self.removed() {
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0
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} else if self.added() {
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SIZE_NON_NORMAL
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} else if let Some((_mode, size)) = self.mode_size {
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size
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} else {
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SIZE_NON_NORMAL
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}
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}
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fn v1_mtime(&self) -> i32 {
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if !self.any_tracked() {
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// TODO: return an Option instead?
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panic!("Accessing v1_mtime of an untracked DirstateEntry")
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}
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if self.removed() {
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0
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} else if self.flags.contains(Flags::P2_INFO) {
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MTIME_UNSET
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} else if !self.flags.contains(Flags::P1_TRACKED) {
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MTIME_UNSET
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} else {
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self.mtime.unwrap_or(MTIME_UNSET)
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}
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}
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// TODO: return `Option<EntryState>`? None when `!self.any_tracked`
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pub fn state(&self) -> EntryState {
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self.v1_state()
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}
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// TODO: return Option?
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pub fn mode(&self) -> i32 {
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self.v1_mode()
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}
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// TODO: return Option?
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pub fn size(&self) -> i32 {
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self.v1_size()
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}
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// TODO: return Option?
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pub fn mtime(&self) -> i32 {
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self.v1_mtime()
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}
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pub fn drop_merge_data(&mut self) {
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if self.flags.contains(Flags::P2_INFO) {
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self.flags.remove(Flags::P2_INFO);
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self.mode_size = None;
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self.mtime = None;
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}
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}
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pub fn set_possibly_dirty(&mut self) {
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self.mtime = None
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}
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pub fn set_clean(&mut self, mode: i32, size: i32, mtime: i32) {
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self.flags.insert(Flags::WDIR_TRACKED | Flags::P1_TRACKED);
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self.mode_size = Some((mode, size));
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self.mtime = Some(mtime);
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}
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pub fn set_tracked(&mut self) {
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self.flags.insert(Flags::WDIR_TRACKED);
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// `set_tracked` is replacing various `normallookup` call. So we mark
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// the files as needing lookup
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//
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// Consider dropping this in the future in favor of something less
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// broad.
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self.mtime = None;
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}
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pub fn set_untracked(&mut self) {
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self.flags.remove(Flags::WDIR_TRACKED);
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self.mode_size = None;
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self.mtime = None;
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}
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/// Returns `(state, mode, size, mtime)` for the puprose of serialization
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/// in the dirstate-v1 format.
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///
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/// This includes marker values such as `mtime == -1`. In the future we may
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/// want to not represent these cases that way in memory, but serialization
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/// will need to keep the same format.
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pub fn v1_data(&self) -> (u8, i32, i32, i32) {
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(
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self.v1_state().into(),
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self.v1_mode(),
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self.v1_size(),
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self.v1_mtime(),
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)
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}
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pub(crate) fn is_from_other_parent(&self) -> bool {
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self.state() == EntryState::Normal
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&& 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.set_possibly_dirty()
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}
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ambiguous
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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 => false,
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}
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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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_ => 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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}
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}
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}
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