This fixes a longstanding issue where evalution output would splatter
over the /var/log/cuirass.log and be inscrutable.
* src/cuirass/base.scm (%cuirass-state-directory): New variable.
(evaluation-log-file): New procedure.
(evaluate)[log-file, log-pipe]: New variables.
Call 'spawn-fiber' with a logging fiber. Wrap 'open-pipe*' call into
'with-error-to-port'. Close 'log-pipe'.
* src/cuirass/base.scm (report-git-error): New procedure.
(with-git-error-handling): New macro.
(process-specs): Use with-git-error-handling to catch and report git errors.
* build-aux/guix.scm (package)[inputs]: Add guile-git.
* configure.ac: Check for (git) module. Also check that (git) exports
git-error-message procedure.
* build-aux/git-version-gen: New script.
* configure.ac (AC_INIT): Use it.
(AC_REQUIRE_AUX_FILE): Distribute it.
* Makefile.am (.version): New target.
(BUILT_SOURCES, EXTRA_DIST): Add it.
(dist-hook): Generate ".tarball-version".
* .gitignore: Update.
This reverts most of 4f0d665746. The load paths
are still hard coded after installation, however 'pre-inst-env' wrapper is
used for defining them in the local build environment. This is more
convenient for running the tests manually or launching a Guile REPL with all
the Cuirass modules accessible.
* build-aux/pre-inst-env.in (GUILE_LOAD_PATH, GUILE_LOAD_COMPILED_PATH): New
variables.
* bin/cuirass.in: Comment Guile load paths.
* Makefile.am (local_load_path, local_load_compiled_path): Delete.
(AM_TESTS_ENVIRONMENT): Don't set Guile load paths.
(do_subst): Use install directories for Guile load paths.
(install-exec-hook): Uncomment 'cuirass' hard coded load paths.
* guix.scm: New file; specify Guix package.
* guix/ci.scm: New file; expose to Guix.
* build-aux/pre-inst-env.in: Add it to GUIX_PACKAGE_PATH.
* bin/evaluate.in (main): Lookup proc using name specified by #:proc.
* tests/guix-track-git.scm: New file.
* tests/hello-git.scm: Test it.
Signed-off-by: Mathieu Lirzin <mthl@gnu.org>