chore: prepare for 1.6.0

Author: gaborbernat-build-release[bot]

CHANGELOG.rst

@@ -1,3 +1,71 @@
+####################
+ 1.6.0 (2026-08-27)
+####################
+
+**********
+ Features
+**********
+
+- Add ``--report=PATH`` to write a machine-readable JSON report of built artifacts; ``--metadata`` now also accepts
+  ``.whl`` files - by :user:`gaborbernat` (:issue:`198`)
+- The ``srcdir`` argument now accepts ``.tar.gz`` source distributions, extracting and building from them - by
+  :user:`gaborbernat` (:issue:`311`)
+- The "Unmet dependencies" error from ``--no-isolation`` builds now shows the wanted version, found version, and
+  interpreter - by :user:`gaborbernat` (:issue:`504`)
+- Add ``--sdist-extract-dir`` to extract the intermediate sdist into a persistent directory, enabling compiler cache reuse
+  across rebuilds - by :user:`gaborbernat` (:issue:`614`)
+- Add ``--env-dir`` to place the isolated build environment at a fixed path, enabling compiler cache reuse across builds -
+  by :user:`gaborbernat` (:issue:`655`)
+- Print a summary of resolved dependency versions (``name==version``) after installing them in isolated builds - by
+  :user:`gaborbernat` (:issue:`959`)
+- On build failure, print a tip pointing to ``--env-dir`` and ``--sdist-extract-dir`` for debugging and link to the "Debug
+  a failed build" how-to - reported by :user:`dimpase`, implemented by :user:`gaborbernat` (:issue:`966`)
+
+**********
+ Bugfixes
+**********
+
+- Drain verbose subprocess output inline instead of using a ``ThreadPoolExecutor``, which silently swallowed logging
+  errors - by :user:`henryiii` (:issue:`1098`)
+- Reject a file passed as ``--env-dir`` with a clear error instead of a raw ``FileExistsError`` - by :user:`henryiii` (:issue:`1100`)
+- Emit CLI warnings to stderr instead of stdout, so they no longer corrupt ``--metadata`` JSON output on stdout - by
+  :user:`ymyzk` (:issue:`1111`)
+- Fix the Windows symlink support probe always returning ``False`` due to a stale object interpolated into the destination
+  path - by :user:`henryiii` (:issue:`1118`)
+- Fix ``metadata_path``'s build-backend fallback returning a nonexistent dist-info path for wheels with a build tag - by
+  :user:`henryiii` (:issue:`1119`)
+- Write pip/uv requirements and constraints files with ``\n`` instead of ``os.linesep``, avoiding doubled ``\r\r\n`` line
+  endings on Windows - by :user:`henryiii` (:issue:`1120`)
+- Batch of small robustness fixes: correct macOS release parsing for the minimum pip version, avoid sharing the mutable
+  default build-system table between builders, keep the original error when isolated-environment setup fails early, and
+  raise ``BuildException`` for an invalid wheel - by :user:`henryiii` (:issue:`1121`)
+- Decide color support independently for stdout and stderr instead of only checking ``stdout.isatty()``, so redirecting
+  one stream no longer disables or leaks ANSI colors on the other - by :user:`henryiii` (:issue:`1123`)
+- Pass ``--dependency-constraints-txt`` files through to the installer unmodified instead of re-parsing them into a
+  deduplicated set of lines, fixing a case where a hashed requirement (e.g. from ``pip-compile --generate-hashes``) could
+  have its ``--hash`` continuation line separated from its requirement line and silently dropped, depending on the
+  interpreter's hash seed - by :user:`manfred-kaiser` (:issue:`1140`)
+
+**********
+ Removals
+**********
+
+- Remove ``exc_info`` parameter and attribute from ``BuildBackendException``. - by :user:`layday` (:issue:`1161`)
+
+**************
+ Deprecations
+**************
+
+- Deprecate :func:`build.util.project_wheel_metadata`; use ``python -m build --metadata`` instead - by :user:`gaborbernat` (:issue:`557`)
+- Warn on config settings without a value (e.g. ``-C--my-flag``); use ``-C--my-flag=`` instead for compatibility with pip
+  - by :user:`gaborbernat` (:issue:`640`)
+
+***************
+ Miscellaneous
+***************
+
+- :issue:`1058`, :issue:`1060`, :issue:`1062`, :issue:`1093`, :issue:`1099`, :issue:`1107`, :issue:`1113`, :issue:`1117`, :issue:`1122`, :issue:`1124`, :issue:`1128`, :issue:`1132`
+
 ####################
  1.5.0 (2026-04-30)
 ####################