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#!/usr/bin/env bash
# This script manages the environment needed by the helper scripts
# It needs to have one environment variable set in order to do its job:
# LLVM_ROOT - the directory under which the llvm sources and build directories
# will live
# This script is meant to be sourced, so we don't want things to exit on error,
# because that would kill the whole shell. Instead, we trap and return from the
# script (which leaves the shell running, so people can see what went wrong).
clean_exit="trap '' ERR; return"
trap "$clean_exit" ERR
. llvm-common
# Check that we have actually been sourced
if [ -z "$PS1" ]; then
echo "This script must be sourced. You might want to create an alias llvm-env=\". llvm-env\""
exit 1
fi
list_worktrees() {
current_worktree=$1
# FIXME:
# Ideally we would just use git for this (I think git 2.7-ish should suffice),
# but I'm currently stuck with git 2.5 on my Ubuntu and it seems to me the
# rest of the team is on older gits too. Until we all move to a smarter git,
# we're going to use the simplest possible implementation that can give us
# what we want (the proper way to do this ofc would be to inspect
# $GITDIR/worktrees/). This implementation has the disadvantage that it may
# give false positives or false negatives if you do naughty things with your
# $LLVM_ROOT.
pushdq $LLVM_ROOT
for dir in *; do
if [ -d "$dir" -a -f "$dir/llvm/.git" ]; then
pushdq $dir/llvm
branch=`get_branch`
popdq
if [ "$current_worktree" = "$LLVM_ROOT/$dir/llvm" ]; then
echo "[ $dir ($branch) ]"
else
echo "$dir ($branch)"
fi
fi
done
popdq
}
if [ "$1" = "" ]; then
if [ -z "$LLVM_SRC" ]; then
list_worktrees
echo "You haven't set up an env (LLVM_SRC is empty)"
eval $clean_exit
fi
worktree=`basename $(readlink -m $LLVM_SRC/../)`
list_worktrees $LLVM_SRC
eval $clean_exit
elif [ "$1" = "-h" ]; then
echo "Usage: $0 <branch> [-cleanup] [-d]"
echo " <branch> : the name of the branch you want to set the env for;"
echo " it will be created if it does not already exist."
echo " -cleanup : will clean up the environment corresponding to <branch>;"
echo " this includes the worktrees for all the subprojects, as"
echo " well as any directories in that environment (especially the"
echo " build dirs!)"
echo " it will not clean up any branches (you should use"
echo " llvm-branch for that)"
echo " -d : build the debug version."
eval $clean_exit
fi
branch=$1
shift
if [[ $branch = -* ]]; then
echo "Invalid branch name $branch"
eval $clean_exit
fi
if [ "$branch" = "master" ]; then
echo "Building master directly is not supported."
echo "You can instead run 'llvm-env TrackMaster'"
echo "to create an environment that tracks master."
eval $clean_exit
fi
clean=false
if [ "$1" = "-cleanup" ]; then
clean=true
shift
fi
debug_build=false
OPTIND=0
while getopts "d" opt; do
if [ "$opt" = "d" ]; then
debug_build=true
else
eval $clean_exit
fi
shift
done
if [ "$1" != "" ]; then
echo "Too many args?"
eval $clean_exit
fi
llvm_dir=$LLVM_ROOT/repos/llvm
llvm_worktree_dir=$LLVM_ROOT/$branch/llvm
llvm_build_dir=$LLVM_ROOT/$branch/build
if $debug_build; then
llvm_build_dir=$LLVM_ROOT/$branch/debug
fi
llvm_install_dir=$LLVM_ROOT/$branch/install
if [ "$clean" = true ]; then
.llvm-env-remove $llvm_dir $llvm_worktree_dir
else
.llvm-env-add $branch $llvm_dir $llvm_worktree_dir
fi
# Changes to the environment should be confined to the end of the script, to
# make sure we don't change half the environment and then fail out
if [ "$clean" = true ]; then
# Clean up the environment to make sure the other scripts error out
# accordingly instead of trying anything stupid
export LLVM_SRC=
export LLVM_BLD=
export LLVM_DEBUG=
if [ ! -z "$LLVM_OLD_PATH" ]; then
export PATH=$LLVM_OLD_PATH
fi
eval $clean_exit
fi
export LLVM_SRC=$llvm_worktree_dir
export LLVM_BLD=$llvm_build_dir
export LLVM_INSTALL=$llvm_install_dir
export LLVM_DEBUG=$debug_build # For llvm-build to know
# Make it possible to undo changes to the PATH: we export an LLVM_OLD_PATH, and
# instead of appending the binary dir to $PATH, we append to $LLVM_OLD_PATH (if
# it exists)
# This is intended to support scenarios where you want to switch between a
# release and debug build of the same branch in the same shell, without growing
# a huge PATH
path_to_add_to=$PATH
if [ ! -z "$LLVM_OLD_PATH" ]; then
path_to_add_to=$LLVM_OLD_PATH
fi
export LLVM_OLD_PATH=$path_to_add_to
export PATH=$llvm_build_dir/bin:$path_to_add_to
eval $clean_exit
|
