Created
September 22, 2024 16:13
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add llvm repo to ubuntu / linux mint and symlink llvm binaries, making it the default compiler
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| #!/usr/bin/perl -w | |
| use strict; | |
| # update this whe n new versions of llvm come out | |
| my $llvm_version = 19; | |
| # mint has a file that lets you know the ubuntu upstream release version | |
| sub get_dist_version_from_mint { | |
| open my $fh, '<', '/etc/upstream-release/lsb-release' or die; | |
| my $codename = ''; | |
| while (my $line = <$fh>) { | |
| if ($line =~ /^DISTRIB_CODENAME=(\S+)/) { | |
| $codename = $1; | |
| } | |
| } | |
| close $fh; | |
| return $codename; | |
| } | |
| sub read_os_release { | |
| my $os_release_file = '/etc/os-release'; | |
| my %os_info; | |
| if (-e $os_release_file) { | |
| open my $fh, '<', $os_release_file or die "Could not open '$os_release_file': $!"; | |
| while (my $line = <$fh>) { | |
| chomp $line; # Remove newline character | |
| if ($line =~ /^(.*)=(.*)$/) { | |
| my $key = $1; | |
| my $value = $2; | |
| # Remove surrounding quotes from the value | |
| $value =~ s/^"(.*)"$/$1/; | |
| $value =~ s/^'(.*)'$/$1/; | |
| $os_info{$key} = $value; | |
| } | |
| } | |
| close $fh; | |
| } | |
| return %os_info; | |
| } | |
| sub run_cmd { | |
| my $cmd = shift; | |
| print("> $cmd\n"); | |
| return system($cmd) == 0; | |
| } | |
| sub apt_source { | |
| my $llvm_version = shift; | |
| my $dist_version = shift; | |
| return "deb http://apt.llvm.org/$dist_version/ llvm-toolchain-$dist_version-$llvm_version main"; | |
| } | |
| # debian alternative priority | |
| my $priority = 100; | |
| my %os_release = read_os_release(); | |
| my $dist_version = $os_release{UBUNTU_CODENAME}; | |
| die $dist_version; | |
| run_cmd("wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -"); | |
| # attempt removal of old apt source, may silently fail | |
| my $old_apt_source = apt_source($llvm_version - 1, $dist_version); | |
| run_cmd("add-apt-repository --remove \"$old_apt_source\""); | |
| my $new_apt_source = apt_source($llvm_version, $dist_version); | |
| run_cmd("add-apt-repository \"$new_apt_source\""); | |
| run_cmd("apt update"); | |
| my @packages = qw(clang lldb lld llvm clang-format clang-tidy clang-tools); | |
| my $cmd = "apt -y install "; | |
| foreach (@packages) { | |
| my $pkg_name = $_ . "-" .$llvm_version; | |
| $cmd .= "$pkg_name "; | |
| } | |
| run_cmd($cmd); | |
| my @programs = qw(clang clang++ clang-tidy clang-format scan-build lldb lld llvm-config); | |
| # remove existing alternatives | |
| foreach (@programs) { | |
| run_cmd("update-alternatives --remove-all $_"); | |
| } | |
| # now install alternatives | |
| foreach (@programs) { | |
| my $pkg_name = $_ . "-" .$llvm_version; | |
| run_cmd("update-alternatives --install /usr/bin/$_ $_ /usr/bin/$pkg_name $priority"); | |
| } |
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