1use anyhow::{anyhow, Context, Result};
  2use serde::{Deserialize, Serialize};
  3use std::ffi::OsStr;
  4use std::fmt;
  5use std::str::FromStr;
  6
  7pub use git2 as libgit;
  8pub use lazy_static::lazy_static;
  9
 10pub mod blame;
 11pub mod commit;
 12pub mod diff;
 13pub mod hosting_provider;
 14pub mod permalink;
 15pub mod repository;
 16
 17lazy_static! {
 18    pub static ref DOT_GIT: &'static OsStr = OsStr::new(".git");
 19    pub static ref GITIGNORE: &'static OsStr = OsStr::new(".gitignore");
 20}
 21
 22#[derive(Clone, Copy, Eq, Hash, PartialEq)]
 23pub struct Oid(libgit::Oid);
 24
 25impl Oid {
 26    pub fn from_bytes(bytes: &[u8]) -> Result<Self> {
 27        let oid = libgit::Oid::from_bytes(bytes).context("failed to parse bytes into git oid")?;
 28        Ok(Self(oid))
 29    }
 30
 31    pub fn as_bytes(&self) -> &[u8] {
 32        self.0.as_bytes()
 33    }
 34
 35    pub(crate) fn is_zero(&self) -> bool {
 36        self.0.is_zero()
 37    }
 38}
 39
 40impl FromStr for Oid {
 41    type Err = anyhow::Error;
 42
 43    fn from_str(s: &str) -> std::prelude::v1::Result<Self, Self::Err> {
 44        libgit::Oid::from_str(s)
 45            .map_err(|error| anyhow!("failed to parse git oid: {}", error))
 46            .map(|oid| Self(oid))
 47    }
 48}
 49
 50impl fmt::Debug for Oid {
 51    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 52        fmt::Display::fmt(self, f)
 53    }
 54}
 55
 56impl fmt::Display for Oid {
 57    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 58        self.0.fmt(f)
 59    }
 60}
 61
 62impl Serialize for Oid {
 63    fn serialize<S>(&self, serializer: S) -> std::prelude::v1::Result<S::Ok, S::Error>
 64    where
 65        S: serde::Serializer,
 66    {
 67        serializer.serialize_str(&self.0.to_string())
 68    }
 69}
 70
 71impl<'de> Deserialize<'de> for Oid {
 72    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
 73    where
 74        D: serde::Deserializer<'de>,
 75    {
 76        let s = String::deserialize(deserializer)?;
 77        s.parse::<Oid>().map_err(serde::de::Error::custom)
 78    }
 79}
 80
 81impl Default for Oid {
 82    fn default() -> Self {
 83        Self(libgit::Oid::zero())
 84    }
 85}
 86
 87impl From<Oid> for u32 {
 88    fn from(oid: Oid) -> Self {
 89        let bytes = oid.0.as_bytes();
 90        debug_assert!(bytes.len() > 4);
 91
 92        let mut u32_bytes: [u8; 4] = [0; 4];
 93        u32_bytes.copy_from_slice(&bytes[..4]);
 94
 95        u32::from_ne_bytes(u32_bytes)
 96    }
 97}
 98
 99impl From<Oid> for usize {
100    fn from(oid: Oid) -> Self {
101        let bytes = oid.0.as_bytes();
102        debug_assert!(bytes.len() > 8);
103
104        let mut u64_bytes: [u8; 8] = [0; 8];
105        u64_bytes.copy_from_slice(&bytes[..8]);
106
107        u64::from_ne_bytes(u64_bytes) as usize
108    }
109}