Replace individual scripts with master 'guix' script.

* scripts/guix.in: New script.

* Makefile.am (bin_SCRIPTS): Add 'scripts/guix'.  Remove 'guix-build',
  'guix-download', 'guix-import', 'guix-package', and 'guix-gc'.

  (MODULES): Add 'guix/scripts/build.scm', 'guix/scripts/download.scm',
  'guix/scripts/import.scm', 'guix/scripts/package.scm', and
  'guix/scripts/gc.scm'.

* configure.ac (AC_CONFIG_FILES): Add 'scripts/guix'.  Remove 'guix-build',
  'guix-download', 'guix-import', 'guix-package', and 'guix-gc'.

* guix-build.in, guix-download.in, guix-gc.in, guix-import.in,
  guix-package.in: Remove shell script boilerplate.  Move to guix-COMMAND.in
  to guix/scripts/COMMAND.scm.  Rename module from (guix-COMMAND) to
  (guix scripts COMMAND).  Change "guix-COMMAND" to "guix COMMAND" in
  usage help string.

* pre-inst-env.in: Add "@abs_top_builddir@/scripts" to the front of $PATH.
  Export $GUIX_UNINSTALLED.

* tests/guix-build.sh, tests/guix-daemon.sh, tests/guix-download.sh,
  tests/guix-gc.sh, tests/guix-package.sh: Use "guix COMMAND" instead of
  "guix-COMMAND".

* doc/guix.texi: Replace all occurrences of "guix-COMMAND" with
  "guix COMMAND".

* po/POTFILES.in: Update.

1 files changed, 304 insertions, 0 deletions

diff --git a/guix/scripts/build.scm b/guix/scripts/build.scm
new file mode 100644
index 0000000000..bad04418f1
--- /dev/null
+++ b/guix/scripts/build.scm
@@ -0,0 +1,304 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2013 Mark H Weaver <mhw@netris.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; 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/>.
+
+(define-module (guix scripts build)
+  #:use-module (guix ui)
+  #:use-module (guix store)
+  #:use-module (guix derivations)
+  #:use-module (guix packages)
+  #:use-module (guix utils)
+  #:use-module (ice-9 format)
+  #:use-module (ice-9 match)
+  #:use-module (ice-9 vlist)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-11)
+  #:use-module (srfi srfi-26)
+  #:use-module (srfi srfi-34)
+  #:use-module (srfi srfi-37)
+  #:autoload   (gnu packages) (find-packages-by-name
+                               find-newest-available-packages)
+  #:export (guix-build))
+
+(define %store
+  (make-parameter #f))
+
+(define (derivations-from-package-expressions exp system source?)
+  "Eval EXP and return the corresponding derivation path for SYSTEM.
+When SOURCE? is true, return the derivations of the package sources."
+  (let ((p (eval exp (current-module))))
+    (if (package? p)
+        (if source?
+            (let ((source (package-source p))
+                  (loc    (package-location p)))
+              (if source
+                  (package-source-derivation (%store) source)
+                  (leave (_ "~a: error: package `~a' has no source~%")
+                         (location->string loc) (package-name p))))
+            (package-derivation (%store) p system))
+        (leave (_ "expression `~s' does not evaluate to a package~%")
+               exp))))
+
+
+;;;
+;;; Command-line options.
+;;;
+
+(define %default-options
+  ;; Alist of default option values.
+  `((system . ,(%current-system))
+    (substitutes? . #t)
+    (verbosity . 0)))
+
+(define (show-help)
+  (display (_ "Usage: guix build [OPTION]... PACKAGE-OR-DERIVATION...
+Build the given PACKAGE-OR-DERIVATION and return their output paths.\n"))
+  (display (_ "
+  -e, --expression=EXPR  build the package EXPR evaluates to"))
+  (display (_ "
+  -S, --source           build the packages' source derivations"))
+  (display (_ "
+  -s, --system=SYSTEM    attempt to build for SYSTEM--e.g., \"i686-linux\""))
+  (display (_ "
+  -d, --derivations      return the derivation paths of the given packages"))
+  (display (_ "
+  -K, --keep-failed      keep build tree of failed builds"))
+  (display (_ "
+  -n, --dry-run          do not build the derivations"))
+  (display (_ "
+      --no-substitutes   build instead of resorting to pre-built substitutes"))
+  (display (_ "
+  -c, --cores=N          allow the use of up to N CPU cores for the build"))
+  (display (_ "
+  -r, --root=FILE        make FILE a symlink to the result, and register it
+                         as a garbage collector root"))
+  (display (_ "
+      --verbosity=LEVEL  use the given verbosity LEVEL"))
+  (newline)
+  (display (_ "
+  -h, --help             display this help and exit"))
+  (display (_ "
+  -V, --version          display version information and exit"))
+  (newline)
+  (show-bug-report-information))
+
+(define %options
+  ;; Specifications of the command-line options.
+  (list (option '(#\h "help") #f #f
+                (lambda args
+                  (show-help)
+                  (exit 0)))
+        (option '(#\V "version") #f #f
+                (lambda args
+                  (show-version-and-exit "guix-build")))
+
+        (option '(#\S "source") #f #f
+                (lambda (opt name arg result)
+                  (alist-cons 'source? #t result)))
+        (option '(#\s "system") #t #f
+                (lambda (opt name arg result)
+                  (alist-cons 'system arg
+                              (alist-delete 'system result eq?))))
+        (option '(#\d "derivations") #f #f
+                (lambda (opt name arg result)
+                  (alist-cons 'derivations-only? #t result)))
+        (option '(#\e "expression") #t #f
+                (lambda (opt name arg result)
+                  (alist-cons 'expression
+                              (call-with-input-string arg read)
+                              result)))
+        (option '(#\K "keep-failed") #f #f
+                (lambda (opt name arg result)
+                  (alist-cons 'keep-failed? #t result)))
+        (option '(#\c "cores") #t #f
+                (lambda (opt name arg result)
+                  (let ((c (false-if-exception (string->number arg))))
+                    (if c
+                        (alist-cons 'cores c result)
+                        (leave (_ "~a: not a number~%") arg)))))
+        (option '(#\n "dry-run") #f #f
+                (lambda (opt name arg result)
+                  (alist-cons 'dry-run? #t result)))
+        (option '("no-substitutes") #f #f
+                (lambda (opt name arg result)
+                  (alist-cons 'substitutes? #f
+                              (alist-delete 'substitutes? result))))
+        (option '(#\r "root") #t #f
+                (lambda (opt name arg result)
+                  (alist-cons 'gc-root arg result)))
+        (option '("verbosity") #t #f
+                (lambda (opt name arg result)
+                  (let ((level (string->number arg)))
+                    (alist-cons 'verbosity level
+                                (alist-delete 'verbosity result)))))))
+
+
+;;;
+;;; Entry point.
+;;;
+
+(define (guix-build . args)
+  (define (parse-options)
+    ;; Return the alist of option values.
+    (args-fold args %options
+               (lambda (opt name arg result)
+                 (leave (_ "~A: unrecognized option~%") name))
+               (lambda (arg result)
+                 (alist-cons 'argument arg result))
+               %default-options))
+
+  (define (register-root paths root)
+    ;; Register ROOT as an indirect GC root for all of PATHS.
+    (let* ((root (string-append (canonicalize-path (dirname root))
+                                "/" root)))
+     (catch 'system-error
+       (lambda ()
+         (match paths
+           ((path)
+            (symlink path root)
+            (add-indirect-root (%store) root))
+           ((paths ...)
+            (fold (lambda (path count)
+                    (let ((root (string-append root "-" (number->string count))))
+                      (symlink path root)
+                      (add-indirect-root (%store) root))
+                    (+ 1 count))
+                  0
+                  paths))))
+       (lambda args
+         (format (current-error-port)
+                 (_ "failed to create GC root `~a': ~a~%")
+                 root (strerror (system-error-errno args)))
+         (exit 1)))))
+
+  (define newest-available-packages
+    (memoize find-newest-available-packages))
+
+  (define (find-best-packages-by-name name version)
+    (if version
+        (find-packages-by-name name version)
+        (match (vhash-assoc name (newest-available-packages))
+          ((_ version pkgs ...) pkgs)
+          (#f '()))))
+
+  (define (find-package request)
+    ;; Return a package matching REQUEST.  REQUEST may be a package
+    ;; name, or a package name followed by a hyphen and a version
+    ;; number.  If the version number is not present, return the
+    ;; preferred newest version.
+    (let-values (((name version)
+                  (package-name->name+version request)))
+      (match (find-best-packages-by-name name version)
+        ((p)                                      ; one match
+         p)
+        ((p x ...)                                ; several matches
+         (format (current-error-port)
+                 (_ "warning: ambiguous package specification `~a'~%")
+                 request)
+         (format (current-error-port)
+                 (_ "warning: choosing ~a from ~a~%")
+                 (package-full-name p)
+                 (location->string (package-location p)))
+         p)
+        (_                                        ; no matches
+         (if version
+             (leave (_ "~A: package not found for version ~a~%")
+                    name version)
+             (leave (_ "~A: unknown package~%") name))))))
+
+  (install-locale)
+  (textdomain "guix")
+  (setvbuf (current-output-port) _IOLBF)
+  (setvbuf (current-error-port) _IOLBF)
+
+  (with-error-handling
+    (let ((opts (parse-options)))
+      (parameterize ((%store (open-connection)))
+        (let* ((src? (assoc-ref opts 'source?))
+               (sys  (assoc-ref opts 'system))
+               (drv  (filter-map (match-lambda
+                                  (('expression . exp)
+                                   (derivations-from-package-expressions exp sys
+                                                                         src?))
+                                  (('argument . (? derivation-path? drv))
+                                   drv)
+                                  (('argument . (? string? x))
+                                   (let ((p (find-package x)))
+                                     (if src?
+                                         (let ((s (package-source p)))
+                                           (package-source-derivation
+                                            (%store) s))
+                                         (package-derivation (%store) p sys))))
+                                  (_ #f))
+                                 opts))
+               (req  (append-map (lambda (drv-path)
+                                   (let ((d (call-with-input-file drv-path
+                                              read-derivation)))
+                                     (derivation-prerequisites-to-build (%store) d)))
+                                 drv))
+               (req* (delete-duplicates
+                      (append (remove (compose (cut valid-path? (%store) <>)
+                                               derivation-path->output-path)
+                                      drv)
+                              (map derivation-input-path req))))
+               (roots (filter-map (match-lambda
+                                   (('gc-root . root) root)
+                                   (_ #f))
+                                  opts)))
+          (if (assoc-ref opts 'dry-run?)
+              (format (current-error-port)
+                      (N_ "~:[the following derivation would be built:~%~{   ~a~%~}~;~]"
+                          "~:[the following derivations would be built:~%~{    ~a~%~}~;~]"
+                          (length req*))
+                      (null? req*) req*)
+              (format (current-error-port)
+                      (N_ "~:[the following derivation will be built:~%~{   ~a~%~}~;~]"
+                          "~:[the following derivations will be built:~%~{    ~a~%~}~;~]"
+                          (length req*))
+                      (null? req*) req*))
+
+          ;; TODO: Add more options.
+          (set-build-options (%store)
+                             #:keep-failed? (assoc-ref opts 'keep-failed?)
+                             #:build-cores (or (assoc-ref opts 'cores) 0)
+                             #:use-substitutes? (assoc-ref opts 'substitutes?)
+                             #:verbosity (assoc-ref opts 'verbosity))
+
+          (if (assoc-ref opts 'derivations-only?)
+              (begin
+                (format #t "~{~a~%~}" drv)
+                (for-each (cut register-root <> <>)
+                          (map list drv) roots))
+              (or (assoc-ref opts 'dry-run?)
+                  (and (build-derivations (%store) drv)
+                       (for-each (lambda (d)
+                                   (let ((drv (call-with-input-file d
+                                                read-derivation)))
+                                     (format #t "~{~a~%~}"
+                                             (map (match-lambda
+                                                   ((out-name . out)
+                                                    (derivation-path->output-path
+                                                     d out-name)))
+                                                  (derivation-outputs drv)))))
+                                 drv)
+                       (for-each (cut register-root <> <>)
+                                 (map (lambda (drv)
+                                        (map cdr
+                                             (derivation-path->output-paths drv)))
+                                      drv)
+                                 roots)))))))))