From e49951eb3e1e1a8e7bad6d7471483e70b0865352 Mon Sep 17 00:00:00 2001
From: Mark H Weaver <mhw@netris.org>
Date: Thu, 14 Feb 2013 04:15:25 -0500
Subject: 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.
---
 guix/ui.scm | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

(limited to 'guix/ui.scm')

diff --git a/guix/ui.scm b/guix/ui.scm
index 4aa93de3b4..644a3070f6 100644
--- a/guix/ui.scm
+++ b/guix/ui.scm
@@ -1,5 +1,6 @@
 ;;; 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.
 ;;;
@@ -30,6 +31,7 @@
   #:export (_
             N_
             install-locale
+            initialize-guix
             leave
             show-version-and-exit
             show-bug-report-information
@@ -38,7 +40,9 @@
             location->string
             fill-paragraph
             string->recutils
-            package->recutils))
+            package->recutils
+            run-guix-command
+            guix-main))
 
 ;;; Commentary:
 ;;;
@@ -62,6 +66,12 @@
               (_ "warning: failed to install locale: ~a~%")
               (strerror (system-error-errno args))))))
 
+(define (initialize-guix)
+  (install-locale)
+  (textdomain "guix")
+  (setvbuf (current-output-port) _IOLBF)
+  (setvbuf (current-error-port) _IOLBF))
+
 (define-syntax-rule (leave fmt args ...)
   "Format FMT and ARGS to the error port and exit."
   (begin
@@ -210,4 +220,30 @@ WIDTH columns."
           (and=> (package-description p) description->recutils))
   (newline port))
 
+(define (show-guix-usage)
+  ;; TODO: Dynamically generate a summary of available commands.
+  (format (current-error-port)
+          (_ "Usage: guix COMMAND ARGS...~%")))
+
+(define (run-guix-command command . args)
+  ;; TODO: Gracefully report errors
+  (let* ((module (resolve-interface `(guix scripts ,command)))
+         (command-main (module-ref module
+                                   (symbol-append 'guix- command))))
+    (apply command-main args)))
+
+(define (guix-main arg0 . args)
+  (initialize-guix)
+  (let ()
+    (define (option? str) (string-prefix? "-" str))
+    (match args
+      (() (show-guix-usage) (exit 1))
+      (("--help") (show-guix-usage))
+      (("--version") (show-version-and-exit "guix"))
+      (((? option? arg1) args ...) (show-guix-usage) (exit 1))
+      ((command args ...)
+       (apply run-guix-command
+              (string->symbol command)
+              args)))))
+
 ;;; ui.scm ends here
-- 
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