tests: Track Cuirass' git.

* 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>

2 files changed, 274 insertions, 0 deletions

diff --git a/tests/guix-track-git.scm b/tests/guix-track-git.scm
new file mode 100644
index 0000000..10a3d48
--- /dev/null
+++ b/tests/guix-track-git.scm
@@ -0,0 +1,221 @@
+;;; guix-track-git.scm -- job specification tracking a guix packages's git
+;;; Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
+;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;
+;;; This file is part of Cuirass.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+;;;
+;;; This file defines build jobs for the Hydra continuation integration
+;;; tool.
+;;;
+
+(define local-guix (string-append (getenv "HOME") "/src/guix"))
+(define local-cuirass (string-append (getenv "HOME") "/src/cuirass/src"))
+
+;; Attempt to use our very own Guix modules.
+(eval-when (compile load eval)
+
+  (set! %load-path (cons* local-guix local-cuirass %load-path))
+  (set! %load-path (cons (string-append local-cuirass "/gnu/packages/patches") %load-path))
+  (set! %load-compiled-path (cons local-guix %load-compiled-path))
+  (set! %load-compiled-path (cons local-cuirass %load-compiled-path))
+
+  ;; Ignore any available .go, and force recompilation.  This is because our
+  ;; checkout in the store has mtime set to the epoch, and thus .go files look
+  ;; newer, even though they may not correspond.
+  (set! %fresh-auto-compile #t))
+
+(use-modules (guix config)
+             (guix store)
+             (guix grafts)
+             (guix packages)
+             (guix derivations)
+             (guix monads)
+             ((guix licenses)
+              #:select (gpl3+ license-name license-uri license-comment))
+             ((guix utils) #:select (%current-system))
+             ((guix scripts system) #:select (read-operating-system))
+             (gnu packages)
+             (gnu packages gcc)
+             (gnu packages base)
+             (gnu packages gawk)
+             (gnu packages guile)
+             (gnu packages gettext)
+             (gnu packages compression)
+             (gnu packages multiprecision)
+             (gnu packages make-bootstrap)
+             (gnu packages commencement)
+             (gnu packages package-management)
+             (gnu system)
+             (gnu system vm)
+             (gnu system install)
+             (gnu tests)
+             (srfi srfi-1)
+             (srfi srfi-26)
+             (ice-9 optargs)
+             (ice-9 match))
+
+;; XXX: Debugging hack: since `hydra-eval-guile-jobs' redirects the output
+;; port to the bit bucket, let us write to the error port instead.
+(setvbuf (current-error-port) _IOLBF)
+(set-current-output-port (current-error-port))
+
+(define (license->alist lcs)
+  "Return LCS <license> object as an alist."
+  ;; Sometimes 'license' field is a list of licenses.
+  (if (list? lcs)
+      (map license->alist lcs)
+      `((name . ,(license-name lcs))
+        (uri . ,(license-uri lcs))
+        (comment . ,(license-comment lcs)))))
+
+(define (package-metadata package)
+  "Convert PACKAGE to an alist suitable for Hydra."
+  `((#:description . ,(package-synopsis package))
+    (#:long-description . ,(package-description package))
+    (#:license . ,(license->alist (package-license package)))
+    (#:home-page . ,(package-home-page package))
+    (#:maintainers . ("bug-guix@gnu.org"))
+    (#:max-silent-time . ,(or (assoc-ref (package-properties package)
+                                         'max-silent-time)
+                              3600))      ;1 hour by default
+    (#:timeout . ,(or (assoc-ref (package-properties package) 'timeout)
+                      72000))))           ;20 hours by default
+
+(define (package-job store job-name package system)
+  "Return a job called JOB-NAME that builds PACKAGE on SYSTEM."
+  (λ ()
+    `((#:job-name . ,(string-append (symbol->string job-name) "." system))
+      (#:derivation . ,(derivation-file-name
+                        (parameterize ((%graft? #f))
+                          (package-derivation store package system
+                                              #:graft? #f))))
+      ,@(package-metadata package))))
+
+(define job-name
+  ;; Return the name of a package's job.
+  (compose string->symbol package-full-name))
+
+(define package->job
+  (let ((base-packages
+         (delete-duplicates
+          (append-map (match-lambda
+                       ((_ package _ ...)
+                        (match (package-transitive-inputs package)
+                          (((_ inputs _ ...) ...)
+                           inputs))))
+                      %final-inputs))))
+    (lambda (store package system)
+      "Return a job for PACKAGE on SYSTEM, or #f if this combination is not
+valid."
+      (cond ((member package base-packages)
+             #f)
+            ((supported-package? package system)
+             (package-job store (job-name package) package system))
+            (else
+             #f)))))
+
+;;; END hydra/gnu-system.scm
+
+
+;;;
+;;; Cuirass CI tracking packages' git
+;;;
+
+(use-modules (srfi srfi-11)
+             (srfi srfi-9 gnu)
+             (rnrs io ports)
+             (gnu packages)
+             (guix base32)
+             (guix git-download)
+             (guix hash)
+             (guix packages)
+             (guix serialization)
+             (guix utils)
+             (guix ui)
+             (cuirass base))
+
+(define (url->file-name url)
+  (string-trim
+   (string-map (lambda (c) (if (memq c (string->list ":/")) #\- c)) url)
+    #\-))
+
+(define* (package->spec pkg #:key (branch "master") commit url)
+  (let ((url (or url ((compose git-reference-url origin-uri package-source) pkg))))
+    `((#:name . ,(url->file-name url))
+      (#:url . ,url)
+      (#:branch . ,branch)
+      (#:commit . ,commit))))
+
+(define (vcs-file? file stat)
+  (case (stat:type stat)
+    ((directory)
+     (member (basename file) '(".bzr" ".git" ".hg" ".svn" "CVS")))
+    (else
+     #f)))
+
+(define select? (negate vcs-file?))
+
+(define (file-hash file)
+  ;; Compute the hash of FILE.
+  ;; Catch and gracefully report possible '&nar-error' conditions.
+  (with-error-handling
+    (let-values (((port get-hash) (open-sha256-port)))
+      (write-file file port #:select? select?)
+      (flush-output-port port)
+      (get-hash))))
+
+(define (commit? string)
+  (string-every (string->char-set "0123456789abcdef") string))
+
+(define (call-with-output-fdes fdes new-file thunk)
+  (let ((outport (fdes->outport fdes))
+        (port (open-file new-file "w")))
+    (move->fdes port fdes)
+    (let ((result (thunk)))
+      (move->fdes port fdes)
+      result)))
+
+(define* (package->git-tracked pkg #:key (branch "master") commit url)
+  (let* ((source (package-source pkg))
+         (uri (origin-uri source)))
+    (if (not branch) pkg
+        (let* ((spec (package->spec pkg #:branch branch #:commit commit #:url url))
+               (commit (call-with-output-fdes 1 "/dev/null"
+                                              (lambda () (fetch-repository spec))))
+               (url (or url (git-reference-url uri)))
+               (git-dir (string-append (%package-cachedir) "/" (url->file-name url)))
+               (hash (bytevector->nix-base32-string (file-hash git-dir)))
+               (source (origin (uri (git-reference (url url) (commit commit)))
+                              (method git-fetch)
+                              (sha256 (base32 hash)))))
+          (set-fields pkg ((package-source) source))))))
+
+
+;;;
+;;; Guix entry point.
+;;;
+
+(define (guix-jobs store arguments)
+  (let* ((name (or (assoc-ref arguments 'name) "hello"))
+         (pkg (specification->package name))
+         (branch (or (assoc-ref arguments 'branch) "master"))
+         (url (assoc-ref arguments 'url))
+         (pkg.git (package->git-tracked pkg #:branch branch #:url url))
+         (system (or (assoc-ref arguments 'system) "x86_64-linux")))
+    (parameterize ((%graft? #f))
+      (list (package-job store (job-name pkg) pkg.git system)))))
diff --git a/tests/hello-git.scm b/tests/hello-git.scm
new file mode 100644
index 0000000..f6df99c
--- /dev/null
+++ b/tests/hello-git.scm
@@ -0,0 +1,53 @@
+;;; hello-git.scm -- job specification test for hello git repository
+;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
+;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;
+;;; This file is part of Cuirass.
+;;;
+;;; Cuirass is free software: you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation, either version 3 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; Cuirass is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with Cuirass.  If not, see <http://www.gnu.org/licenses/>.
+
+(use-modules (srfi srfi-1))
+
+(define (local-file file)
+  ;; In the common case jobs will be defined relative to the repository.
+  ;; However for testing purpose use local gnu-system.scm instead.
+  (string-append (dirname (current-filename)) "/" file))
+
+(define (url->file-name url)
+  (string-trim
+   (string-map (lambda (c) (if (memq c (string->list ":/")) #\- c)) url)
+   #\-))
+
+(define vc
+  ;; where your version-control checkouts live
+  (string-append (getenv "HOME") "/src"))
+(define guix-checkout (string-append vc "/guix"))
+
+;; building GNU hello from git is too much work
+;; (define hello-checkout (string-append vc "/hello"))
+;; (define hello-git "http://git.savannah.gnu.org/r/hello.git")
+;; ... so let's track cuirass' git
+(define cuirass-checkout (string-append vc "/cuirass"))
+(define cuirass-git "https://notabug.org/mthl/cuirass")
+;;(define cuirass-git "https://gitlab.com/janneke/cuirass.git")
+
+(list
+ `((#:name . ,(url->file-name cuirass-checkout))
+   (#:url . ,cuirass-git)
+   (#:branch . "master")
+   (#:no-compile? . #t)
+   (#:load-path . ,guix-checkout)
+   (#:proc . guix-jobs)
+   (#:file . ,(local-file "guix-track-git.scm"))
+   (#:arguments (name . "cuirass") (url . ,cuirass-git))))