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use std::io::prelude::*;
use toml;
use core::{Resolve, resolver, Workspace};
use core::resolver::WorkspaceResolve;
use util::Filesystem;
use util::errors::{CargoResult, CargoResultExt};
use util::toml as cargo_toml;
pub fn load_pkg_lockfile(ws: &Workspace) -> CargoResult<Option<Resolve>> {
if !ws.root().join("Cargo.lock").exists() {
return Ok(None)
}
let root = Filesystem::new(ws.root().to_path_buf());
let mut f = root.open_ro("Cargo.lock", ws.config(), "Cargo.lock file")?;
let mut s = String::new();
f.read_to_string(&mut s).chain_err(|| {
format!("failed to read file: {}", f.path().display())
})?;
(|| -> CargoResult<Option<Resolve>> {
let resolve : toml::Value = cargo_toml::parse(&s, f.path(), ws.config())?;
let v: resolver::EncodableResolve = resolve.try_into()?;
Ok(Some(v.into_resolve(ws)?))
})().chain_err(|| {
format!("failed to parse lock file at: {}", f.path().display())
})
}
pub fn write_pkg_lockfile(ws: &Workspace, resolve: &Resolve) -> CargoResult<()> {
let ws_root = Filesystem::new(ws.root().to_path_buf());
let orig = ws_root.open_ro("Cargo.lock", ws.config(), "Cargo.lock file");
let orig = orig.and_then(|mut f| {
let mut s = String::new();
f.read_to_string(&mut s)?;
Ok(s)
});
let use_root_key = if let Ok(ref orig) = orig {
!orig.starts_with("[[package]]")
} else {
true
};
let toml = toml::Value::try_from(WorkspaceResolve {
ws: ws,
resolve: resolve,
use_root_key: use_root_key,
}).unwrap();
let mut out = String::new();
if let Some(root) = toml.get("root") {
out.push_str("[root]\n");
emit_package(root.as_table().unwrap(), &mut out);
}
let deps = toml["package"].as_array().unwrap();
for dep in deps.iter() {
let dep = dep.as_table().unwrap();
out.push_str("[[package]]\n");
emit_package(dep, &mut out);
}
if let Some(patch) = toml.get("patch") {
let list = patch["unused"].as_array().unwrap();
for entry in list {
out.push_str("[[patch.unused]]\n");
emit_package(entry.as_table().unwrap(), &mut out);
out.push_str("\n");
}
}
if let Some(meta) = toml.get("metadata") {
out.push_str("[metadata]\n");
out.push_str(&meta.to_string());
}
if let Ok(orig) = orig {
if has_crlf_line_endings(&orig) {
out = out.replace("\n", "\r\n");
}
if out == orig {
return Ok(())
}
}
if !ws.config().lock_update_allowed() {
let flag = if ws.config().network_allowed() {"--frozen"} else {"--locked"};
bail!("the lock file needs to be updated but {} was passed to \
prevent this", flag);
}
ws_root.open_rw("Cargo.lock", ws.config(), "Cargo.lock file").and_then(|mut f| {
f.file().set_len(0)?;
f.write_all(out.as_bytes())?;
Ok(())
}).chain_err(|| {
format!("failed to write {}",
ws.root().join("Cargo.lock").display())
})
}
fn has_crlf_line_endings(s: &str) -> bool {
if let Some(lf) = s.find('\n') {
s[..lf].ends_with('\r')
} else {
false
}
}
fn emit_package(dep: &toml::value::Table, out: &mut String) {
out.push_str(&format!("name = {}\n", &dep["name"]));
out.push_str(&format!("version = {}\n", &dep["version"]));
if dep.contains_key("source") {
out.push_str(&format!("source = {}\n", &dep["source"]));
}
if let Some(ref s) = dep.get("dependencies") {
let slice = s.as_array().unwrap();
if !slice.is_empty() {
out.push_str("dependencies = [\n");
for child in slice.iter() {
out.push_str(&format!(" {},\n", child));
}
out.push_str("]\n");
}
out.push_str("\n");
} else if dep.contains_key("replace") {
out.push_str(&format!("replace = {}\n\n", &dep["replace"]));
}
}