diff options
Diffstat (limited to 'compiler/rustc_session/src')
| -rw-r--r-- | compiler/rustc_session/src/config.rs | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs index c665c85d1fe..57c797fa153 100644 --- a/compiler/rustc_session/src/config.rs +++ b/compiler/rustc_session/src/config.rs @@ -16,10 +16,11 @@ use std::{cmp, fmt, fs, iter}; use externs::{ExternOpt, split_extern_opt}; use rustc_data_structures::fx::{FxHashSet, FxIndexMap}; -use rustc_data_structures::stable_hasher::{StableOrd, ToStableHashKey}; +use rustc_data_structures::stable_hasher::{StableHasher, StableOrd, ToStableHashKey}; use rustc_errors::emitter::HumanReadableErrorType; use rustc_errors::{ColorConfig, DiagArgValue, DiagCtxtFlags, IntoDiagArg}; use rustc_feature::UnstableFeatures; +use rustc_hashes::Hash64; use rustc_macros::{Decodable, Encodable, HashStable_Generic}; use rustc_span::edition::{DEFAULT_EDITION, EDITION_NAME_LIST, Edition, LATEST_STABLE_EDITION}; use rustc_span::source_map::FilePathMapping; @@ -1195,7 +1196,25 @@ pub struct OutputFilenames { pub const RLINK_EXT: &str = "rlink"; pub const RUST_CGU_EXT: &str = "rcgu"; pub const DWARF_OBJECT_EXT: &str = "dwo"; +pub const MAX_FILENAME_LENGTH: usize = 143; // ecryptfs limits filenames to 143 bytes see #49914 +/// Ensure the filename is not too long, as some filesystems have a limit. +/// If the filename is too long, hash part of it and append the hash to the filename. +/// This is a workaround for long crate names generating overly long filenames. +fn maybe_strip_file_name(mut path: PathBuf) -> PathBuf { + if path.file_name().map_or(0, |name| name.len()) > MAX_FILENAME_LENGTH { + let filename = path.file_name().unwrap().to_string_lossy(); + let hash_len = 64 / 4; // Hash64 is 64 bits encoded in hex + let stripped_len = filename.len() - MAX_FILENAME_LENGTH + hash_len; + + let mut hasher = StableHasher::new(); + filename[..stripped_len].hash(&mut hasher); + let hash = hasher.finish::<Hash64>(); + + path.set_file_name(format!("{:x}-{}", hash, &filename[stripped_len..])); + } + path +} impl OutputFilenames { pub fn new( out_directory: PathBuf, @@ -1288,7 +1307,7 @@ impl OutputFilenames { } let temps_directory = self.temps_directory.as_ref().unwrap_or(&self.out_directory); - self.with_directory_and_extension(temps_directory, &extension) + maybe_strip_file_name(self.with_directory_and_extension(temps_directory, &extension)) } pub fn temp_path_for_diagnostic(&self, ext: &str) -> PathBuf { |