From aacec0aadcc7c850ed276eed97c2a3a738e25a1d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ciro=20Santilli=20=E5=85=AD=E5=9B=9B=E4=BA=8B=E4=BB=B6=20?=
 =?UTF-8?q?=E6=B3=95=E8=BD=AE=E5=8A=9F?= <ciro.santilli@gmail.com>
Date: Tue, 22 Jan 2019 00:00:00 +0000
Subject: [PATCH] build: add --apt option to make things easier on other
 distros

---
 README.adoc | 14 ++++++++++++--
 build       | 33 +++++++++++++++++++++------------
 2 files changed, 33 insertions(+), 14 deletions(-)

diff --git a/README.adoc b/README.adoc
index d114f3a..c837804 100644
--- a/README.adoc
+++ b/README.adoc
@@ -11276,13 +11276,23 @@ gem5:
 
 We tend to test this repo the most on the latest Ubuntu and on the latest link:https://askubuntu.com/questions/16366/whats-the-difference-between-a-long-term-support-release-and-a-normal-release[Ubuntu LTS].
 
-For other Linux distros, everything will likely also just work if you install the analogous required packages for your distro, find them out with:
+For other Linux distros, everything will likely also just work if you install the analogous required packages for your distro
+
+Find out the packages that we install with:
 
 ....
 ./build --download-dependencies --dry-run
 ....
 
-which just prints what `build` would do quickly without doing anything.
+and then just look for the `apt-get` commands shown on the log.
+
+After installing the missing packages for your distro, do the build with:
+
+....
+./build --download-dependencies --no-apt
+....
+
+which does everything as normal, except that it skips any `apt` commands.
 
 Ports to new host systems are welcome and will be merged.
 
diff --git a/build b/build
index 1800267..9f2cd79 100755
--- a/build
+++ b/build
@@ -338,6 +338,14 @@ so looping over all of them would waste time.
         }
         self.component_to_name_map = {self.name_to_component_map[key]:key for key in self.name_to_component_map}
 
+        self.add_argument(
+            '--apt',
+            default=True,
+            help='''\
+Don't run any apt-get commands. To make it easier to use with other archs:
+https://github.com/cirosantilli/linux-kernel-module-cheat#supported-hosts
+'''
+        )
         self.add_argument(
             '--download-dependencies',
             default=False,
@@ -461,20 +469,21 @@ Which components to build. Default: qemu-buildroot
                     y = ['-y']
                 else:
                     y = []
-                self.sh.run_cmd(
-                    sudo + ['apt-get', 'update', LF]
-                )
-                if apt_get_pkgs:
+                if self.env['apt']:
                     self.sh.run_cmd(
-                        sudo + ['apt-get', 'install'] + y + [LF] +
-                        self.sh.add_newlines(sorted(apt_get_pkgs))
-                    )
-                if apt_build_deps:
-                    self.sh.run_cmd(
-                        sudo +
-                        ['apt-get', 'build-dep'] + y + [LF] +
-                        self.sh.add_newlines(sorted(apt_build_deps))
+                        sudo + ['apt-get', 'update', LF]
                     )
+                    if apt_get_pkgs:
+                        self.sh.run_cmd(
+                            sudo + ['apt-get', 'install'] + y + [LF] +
+                            self.sh.add_newlines(sorted(apt_get_pkgs))
+                        )
+                    if apt_build_deps:
+                        self.sh.run_cmd(
+                            sudo +
+                            ['apt-get', 'build-dep'] + y + [LF] +
+                            self.sh.add_newlines(sorted(apt_build_deps))
+                        )
             if python2_pkgs:
                 self.sh.run_cmd(
                     ['python', '-m', 'pip', 'install', '--user', LF] +