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45 lines
1.8 KiB
Markdown
45 lines
1.8 KiB
Markdown
# Release 2.3 (2019-09-04)
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This is primarily a bug fix release. However, it makes some incompatible
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changes:
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- Nix now uses BSD file locks instead of POSIX file locks. Because of
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this, you should not use Nix 2.3 and previous releases at the same
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time on a Nix store.
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It also has the following changes:
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- `builtins.fetchGit`'s `ref` argument now allows specifying an
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absolute remote ref. Nix will automatically prefix `ref` with
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`refs/heads` only if `ref` doesn't already begin with `refs/`.
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- The installer now enables sandboxing by default on Linux when the
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system has the necessary kernel support.
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- The `max-jobs` setting now defaults to 1.
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- New builtin functions: `builtins.isPath`, `builtins.hashFile`.
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- The `nix` command has a new `--print-build-logs` (`-L`) flag to
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print build log output to stderr, rather than showing the last log
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line in the progress bar. To distinguish between concurrent builds,
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log lines are prefixed by the name of the package.
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- Builds are now executed in a pseudo-terminal, and the `TERM`
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environment variable is set to `xterm-256color`. This allows many
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programs (e.g. `gcc`, `clang`, `cmake`) to print colorized log
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output.
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- Add `--no-net` convenience flag. This flag disables substituters;
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sets the `tarball-ttl` setting to infinity (ensuring that any
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previously downloaded files are considered current); and disables
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retrying downloads and sets the connection timeout to the minimum.
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This flag is enabled automatically if there are no configured
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non-loopback network interfaces.
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- Add a `post-build-hook` setting to run a program after a build has
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succeeded.
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- Add a `trace-function-calls` setting to log the duration of Nix
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function calls to stderr.
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