llvm-nightly-build.sh

#!/bin/sh

# Do a nightly build of LLVM master.
#
# Author: Daan Sprenkels <daan@dsprenkels.com>

set -e

WORKSPACE="$1"

# Determine what our llvm workspace is (probably "$HOME/llvm").
if [ -z "$WORKSPACE" ]
then
    WORKSPACE="$(dirname "$(realpath "$0")")"
elif [ ! -d "$WORKSPACE" ]
then
    echo >&2 "Did not find directory $WORKSPACE."
    exit 1
fi

# Error if there is no "llvm-project" directory
if [ ! -d "$WORKSPACE/llvm-project" ]
then
    echo >&2 "Did not find directory $WORKSPACE/llvm-project."
    exit 1
fi

# Error if there is no "llvm-build" directory
if [ ! -d "$WORKSPACE/llvm-build" ]
then
    echo >&2 "Did not find directory $WORKSPACE/llvm-build."
    exit 1
fi

# Check if the server is doing something else at the moment.
if [ "$(cut </proc/loadavg -f 2 -d ' ' | cut -f 1 -d '.')" != '0' ]
then
    # Thom is probably running benchmarks.
    exit 125
fi

# Checkout the most recent version of the LLVM repository.
(
    cd "$WORKSPACE/llvm-project"

    if [ "$(git rev-parse --abbrev-ref HEAD)" != "master" ]
    then
        # Daan is currenlty working on something.  Do not disturb the state
        # of their current checked out source tree.
        exit 0
    fi
    git pull upstream master --rebase --autostash
)

# Do a nightly build.
(
    cd "$WORKSPACE/llvm-build"
    nice -n 15 ninja 
)

exit 0