diff options
| -rwxr-xr-x | helpers/llvm-ycm | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/helpers/llvm-ycm b/helpers/llvm-ycm new file mode 100755 index 0000000..55ffa50 --- /dev/null +++ b/helpers/llvm-ycm @@ -0,0 +1,102 @@ +#!/usr/bin/env perl + +use strict; +use warnings; + +# This script updates the .ycm_extra_conf.py in $LLVM_SRC to work with +# $LLVM_BLD's compile_commands.json and include/library paths. +# +# Syntax: llvm-ycm +# +# It will: +# * automatically detect $LLVM_SRC/BLD and change the paths. +# * also bail if those variables or .ycm_extra_conf.py don't exist. +# * exit successfully and silently if the file has already changed. + +my ($SRC, $BLD) = ($ENV{'LLVM_SRC'}, $ENV{'LLVM_BLD'}); +if (!$SRC || !$BLD || $ARGV[0] || ! -d $SRC || ! -d $BLD) { + die "Syntax: llvm-ycm\n\nUse llvm-env to set \$LLVM_SRC/BLD\n"; +} +my ($ycm_conf, $compile_db) = (".ycm_extra_conf.py", "compile_commands.json"); + +# If the file doesn't exist, don't try to guess the location of YCM-Generator +# Vim can do that on its own, if properly setup. Educate the user. +if (! -f "$SRC/$ycm_conf") { + die "$SRC/$ycm_conf doesn't exist!\n". + "You need to generate it using YCM-Generator.\n". + "\nTo install, run:\n". + " mkdir -p ~/.vim/ext\n". + " cd ~/.vim/ext\n". + " git clone https://github.com/rdnetto/YCM-Generator.git\n". + "\nTo enable in vim, add this line to your .vimrc:\n". + " set rtp+=~/.vim/ext/YCM-Generator\n". + "\nTo generate the file, open Vim inside your project and type:\n". + " :YcmGenerateConfig\n". + "\nIf all goes well, you should have an $ycm_conf in $SRC\n"; +} + +# If the compile database doesn't exist, there's no point in even trying. +# Educate the user. +if (! -f "$BLD/$compile_db") { + die "$BLD/$compile_db doesn't exist!\n". + "You need to generate it using LLVM's CMake file.\n". + "\nTo create the compile database every build, add this option to CMake:\n". + " -DCMAKE_EXPORT_COMPILE_COMMANDS=ON\n". + "\nRebuild, and check if the file is there, then run this script again.\n"; +} + +my @lines = (); +my $bld_re = $BLD; +$bld_re =~ s/\//\\\//g; + +# We need to open the file, buffer and close, so we can write back to the same +# file again. +open(FH, "$SRC/$ycm_conf") || die "Can't open file '$SRC/$ycm_conf': $!\n"; +foreach my $line (<FH>) { + # If the file has already been changed, let go. + if (&is_changed($line)) { + close FH; + exit(0); + } + + # Change lines if needed + &change(\$line); + + # Buffer + push @lines, $line; +} +close FH; + +# Now we write back and all should be good. +open(FH, ">$SRC/$ycm_conf") || die "Can't open file '$SRC/$ycm_conf': $!\n"; +foreach my $line (@lines) { + print FH $line; +} +close FH; + +# All is good. +exit(0); + +################################ Methods + +# is_changed($line): checks whether the line has been changed by this script. +sub is_changed($) { + my ($line) = @_; + return ($line =~ /-I$bld_re/); +} + +# change($$line): change the line in-place to make it work with YCM. +sub change($) { + my ($line) = @_; + # from: -I/tmp/tmpUF9s_w/include + # to: -I$LLVM_BLD/include + my $changed = ($$line =~ s/\/tmp\/\w+/$BLD/); + return if ($changed); + + # Changing this line will make header and include files not work for + # completion, since they're not in the compilation database. Just using the + # whole lot of flags above works fine. + # from: compilation_database_folder = '' + # to: compilation_database_folder = '$LLVM_BLD' + #$$line =~ s/(compilation_database_folder) = ''/$1 = '$BLD'/; +} |