There is an issue with `package-install-file' that fails with the
following error when trying to install a file written with DOS line
endings:
error: Package lacks a "Version" or "Package-Version" header
(This is more apparent on MS-Windows which writes files with DOS line
endings by default)
To reproduce, create a minimal package file with Emacs on MS-Windows
and write it to disk as package-install-file-test-win.el:
;;; package-install-file-test-win.el --- test issue
;; Version: 0.1
(provide 'package-install-file-test-win)
;;; package-install-file-test-win.el ends here
Then M-x package-install-file RET package-install-file-test-win.el RET
and it should produce the error.
The above succeeds on GNU/Linux and installs the dummy package as
expected.
I have attached an ert test to do the same. The test fail on windows
and succeeds on Linux.
You can run it from command line as:
: emacs -Q --batch -l ert -l ./issue-package-install-file-test.el -f ert-run-tests-batch
The cause appears to be that 'package can't handle package files
encoded with DOS line endings. Analysis to follow.
issue-package-install-file-test.el