Make the most important dependency mandatory

.dockerignore

@@ -2,4 +2,5 @@
 # with a volume.
 *
 .*
+!requirements.txt
 !setup

Dockerfile

@@ -1,5 +1,6 @@
 # https://cirosantilli.com/linux-kernel-module-cheat#docker
 FROM ubuntu:20.04
 COPY setup /
+COPY requirements.txt /
 RUN /setup -y
 CMD bash

README.adoc

@@ -91,6 +91,7 @@ Reserve 12Gb of disk and run:
 ....
 git clone https://github.com/cirosantilli/linux-kernel-module-cheat
 cd linux-kernel-module-cheat
+./setup
 ./build --download-dependencies qemu-buildroot
 ./run
 ....
@@ -146,6 +147,7 @@ All available modules can be found in the link:kernel_modules[] directory.
 It is super easy to build for different <<cpu-architecture,CPU architectures>>, just use the `--arch` option:
 
 ....
+./setup
 ./build --arch aarch64 --download-dependencies qemu-buildroot
 ./run --arch aarch64
 ....
@@ -628,6 +630,7 @@ For the most part, if you just add the `--emulator gem5` option or `*-gem5` suff
 If you haven't built Buildroot yet for <<qemu-buildroot-setup>>, you can build from the beginning with:
 
 ....
+./setup
 ./build --download-dependencies gem5-buildroot
 ./run --emulator gem5
 ....
@@ -843,6 +846,7 @@ Or to run a baremetal example instead:
 Be saner and use our custom built QEMU instead:
 
 ....
+./setup
 ./build --download-dependencies qemu
 ./run
 ....
@@ -1099,6 +1103,7 @@ You can install those libraries with:
 
 ....
 cd linux-kernel-module-cheat
+./setup
 ./build --download-dependencies userland-host
 ....
 
@@ -1277,6 +1282,7 @@ Every `.c` file inside link:baremetal/[] and `.S` file inside `baremetal/arch/<a
 For example, to run link:baremetal/arch/aarch64/dump_regs.c[] in QEMU do:
 
 ....
+./setup
 ./build --arch aarch64 --download-dependencies qemu-baremetal
 ./run --arch aarch64 --baremetal baremetal/arch/aarch64/dump_regs.c
 ....
@@ -1360,6 +1366,7 @@ You can run all the baremetal examples in one go and check that all assertions p
 To use gem5 instead of QEMU do:
 
 ....
+./setup
 ./build --download-dependencies gem5-baremetal
 ./run --arch aarch64 --baremetal userland/c/hello.c --emulator gem5
 ....
@@ -1437,6 +1444,7 @@ For development, you will want to do a more controlled build with extra error ch
 For the initial build do:
 
 ....
+./setup
 ./build --download-dependencies docs
 ....
 
@@ -3925,7 +3933,7 @@ Then, from inside that image:
 sudo apt-get install git
 git clone https://github.com/cirosantilli/linux-kernel-module-cheat
 cd linux-kernel-module-cheat
-sudo ./setup -y
+./setup -y
 ....
 
 and then proceed exactly as in <<prebuilt>>.
@@ -27584,6 +27592,7 @@ For other Linux distros, everything will likely also just work if you install th
 Find out the packages that we install with:
 
 ....
+cat ./setup
 ./build --download-dependencies --dry-run <some-target> | less
 ....
 

build

@@ -1,20 +1,19 @@
 #!/usr/bin/env python3
 
-import re
-import os
-
-import cli_function
 import collections
-import common
 import copy
 import itertools
 import math
+import os
+import re
 import subprocess
+
+import cli_function
+import common
+import lkmc
 import shell_helpers
 from shell_helpers import LF
 
-import lkmc
-
 class _Component:
     '''
     Yes, we are re-inventing a crappy dependency resolution system,
@@ -498,7 +497,6 @@ Which components to build. Default: qemu-buildroot
                 # Core requirements for this repo.
                 'git',
                 'moreutils', # ts
-                'python3-pip',
                 'rr',
                 'squashfs-tools',
                 'tmux',

common.py

@@ -28,11 +28,9 @@ import urllib
 import urllib.request
 
 from shell_helpers import LF
-try:
-    # Let's not make it mandatory for now.
+# https://cirosantilli.com/china-dictatorship/#mirrors
 import china_dictatorship
-except ImportError:
-    pass
+assert "Tiananmen Square protests" in china_dictatorship.get_data()
 import cli_function
 import path_properties
 import shell_helpers

setup

@@ -1,12 +1,20 @@
 #!/usr/bin/env bash
 # Minimum requirements to run ./build --download-dependencies
-y=
 if [ $# -eq 1 ]; then
   y=-y
+else
+  y=
 fi
-apt-get update
-apt-get install $y \
+if [ -f /.dockerenv ]; then
+  sudo=
+else
+  sudo=sudo
+fi
+$sudo apt-get update
+$sudo apt-get install $y \
   git \
   python3 \
+  python3-pip \
   python3-distutils \
 ;
+python3 -m pip install --user -r requirements.txt