job: Add load-path field to <job-spec>.

bin/cuirass.in

@@ -72,15 +72,22 @@ DIR if required."
                                  commit
                                  (string-append "origin/" branch)))))))))
 
+(define (set-load-path! cachedir spec)
+  "Set %LOAD-PATH to match what is specified in SPEC."
+  (let* ((name (job-spec-name spec))
+         (path (job-spec-load-path spec))
+         (dir  (string-join (list cachedir name path) "/")))
+    (format #t "prepending ~s to the load path~%" dir)
+    (set! %load-path (cons dir %load-path))))
+
 (define (evaluate store db cachedir spec)
   "Evaluate and build package derivations.  Return a list a jobs."
   (save-module-excursion
    (lambda ()
      (set-current-module %user-module)
-     (let ((dir (string-append cachedir "/" (job-spec-name spec))))
-       (format #t "prepending ~s to the load path~%" dir)
-       (set! %load-path (cons dir %load-path)))
-     (primitive-load (job-spec-file spec))))
+     ;; Handle both relative and absolute file names for SPEC-FILE.
+     (with-directory-excursion cachedir
+       (primitive-load (job-spec-file spec)))))
   (let* ((proc (module-ref %user-module (job-spec-proc spec)))
          (jobs (proc store (job-spec-arguments spec))))
     (map (λ (job)
@@ -140,16 +147,20 @@ DIR if required."
               (for-each
                (λ (spec)
                  (fetch-repository cachedir spec)
-                 (let ((store ((guix-variable 'store 'open-connection))))
-                   (dynamic-wind
-                     (const #t)
-                     (lambda ()
-                       (let ((jobs (evaluate store db cachedir spec))
-                             (set-build-options
-                              (guix-variable 'store 'set-build-options)))
-                         (set-build-options store #:use-substitutes? #f)
-                         (build-packages store db jobs)))
-                     (lambda ()
-                       ((guix-variable 'store 'close-connection) store)))))
+                 (let ((old-path %load-path))
+                   (and (job-spec-load-path spec)
+                        (set-load-path! cachedir spec))
+                   (let ((store ((guix-variable 'store 'open-connection))))
+                     (dynamic-wind
+                       (const #t)
+                       (lambda ()
+                         (let ((jobs (evaluate store db cachedir spec))
+                               (set-build-options
+                                (guix-variable 'store 'set-build-options)))
+                           (set-build-options store #:use-substitutes? #f)
+                           (build-packages store db jobs)))
+                       (lambda ()
+                         ((guix-variable 'store 'close-connection) store)
+                         (set! %load-path old-path))))))
                specs)
               (sleep (string->number interval))))))))))

build-aux/pre-inst-env.in

@@ -22,6 +22,7 @@ abs_top_builddir="`cd "@abs_top_builddir@" > /dev/null; pwd`"
 
 GUILE_LOAD_COMPILED_PATH="$abs_top_builddir/src${GUILE_LOAD_COMPILED_PATH:+:}$GUILE_LOAD_COMPILED_PATH"
 GUILE_LOAD_PATH="$abs_top_builddir/src:$abs_top_srcdir/src${GUILE_LOAD_PATH:+:}$GUILE_LOAD_PATH"
+export GUILE_LOAD_COMPILED_PATH GUILE_LOAD_PATH
 
 PATH="$abs_top_builddir/bin:$PATH"
 export PATH
@@ -29,10 +30,4 @@ export PATH
 CUIRASS_CACHEDIR="$abs_top_builddir/cache"
 export CUIRASS_CACHEDIR
 
-# Append Guix cloned repository to Guile load paths.
-guixdir="$CUIRASS_CACHEDIR/guix"
-GUILE_LOAD_COMPILED_PATH="$guixdir:$GUILE_LOAD_COMPILED_PATH"
-GUILE_LOAD_PATH="$guixdir:$GUILE_LOAD_PATH"
-export GUILE_LOAD_COMPILED_PATH GUILE_LOAD_PATH
-
 exec "$@"

src/cuirass/job.scm

@@ -32,6 +32,7 @@
             job-spec?
             job-spec-name
             job-spec-url
+            job-spec-load-path
             job-spec-branch
             job-spec-commit
             job-spec-tag
@@ -58,10 +59,11 @@
                   metadata)))))
 
 (define-record-type <job-spec>
-  (%make-job-spec name url branch commit file proc arguments)
+  (%make-job-spec name url load-path branch commit file proc arguments)
   job-spec?
   (name      job-spec-name)             ;string
   (url       job-spec-url)              ;string
+  (load-path job-spec-load-path)        ;string
   (branch    job-spec-branch)           ;string
   (commit    job-spec-commit)           ;string
   (tag       job-spec-tag)              ;string
@@ -69,6 +71,7 @@
   (proc      job-spec-proc)             ;symbol
   (arguments job-spec-arguments))       ;alist
 
-(define* (make-job-spec #:key name url commit tag file proc arguments
+(define* (make-job-spec #:key name url load-path
+                        commit tag file proc arguments
                         (branch "master"))
-  (%make-job-spec name url branch tag file proc arguments))
+  (%make-job-spec name url load-path branch tag file proc arguments))

tests/hello-subset.scm

@@ -27,6 +27,7 @@
 (list (make-job-spec
        #:name "guix"
        #:url "git://git.savannah.gnu.org/guix.git"
+       #:load-path "."
        #:branch "master"
        #:file (local-file "gnu-system.scm")
        #:proc 'hydra-jobs
@@ -34,6 +35,7 @@
       (make-job-spec
        #:name "guix"
        #:url "git://git.savannah.gnu.org/guix.git"
+       #:load-path "."
        #:branch "core-updates"
        #:file (local-file "gnu-system.scm")
        #:proc 'hydra-jobs
@@ -41,6 +43,7 @@
       (make-job-spec
        #:name "guix"
        #:url "git://git.savannah.gnu.org/guix.git"
+       #:load-path "."
        #:tag "v0.9.0"
        #:file (local-file "gnu-system.scm")
        #:proc 'hydra-jobs