run-build.sh

#!/usr/bin/env bash
#
# Copyright (c) .NET Foundation and contributors. All rights reserved.
# Licensed under the MIT license. See LICENSE file in the project root for full license information.
#

set -e

SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
  SOURCE="$(readlink "$SOURCE")"
  [[ "$SOURCE" != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
done
DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
REPOROOT="$DIR"
OLDPATH="$PATH"

ARCHITECTURE="x64"
source "$REPOROOT/scripts/common/_prettyprint.sh"

BUILD=1

# Set nuget package cache under the repo
export NUGET_PACKAGES="$REPOROOT/.nuget/packages"

args=( "$@" )

while [[ $# > 0 ]]; do
    lowerI="$(echo $1 | awk '{print tolower($0)}')"
    case $lowerI in
        -c|--configuration)
            export CONFIGURATION=$2
            args=( "${args[@]/$1}" )
            args=( "${args[@]/$2}" )
            shift
            ;;
        --nopackage)
            export DOTNET_BUILD_SKIP_PACKAGING=1
            args=( "${args[@]/$1}" )
            ;;
        --skip-prereqs)
            # Allow CI to disable prereqs check since the CI has the pre-reqs but not ldconfig it seems
            export DOTNET_INSTALL_SKIP_PREREQS=1
            args=( "${args[@]/$1}" )
            ;;
        --nobuild)
            BUILD=0
            ;;
        --architecture)
            ARCHITECTURE=$2
            args=( "${args[@]/$1}" )
            args=( "${args[@]/$2}" )
            shift
            ;;
        # This is here just to eat away this parameter because CI still passes this in.
        --targets)            
            args=( "${args[@]/$1}" )
            args=( "${args[@]/$2}" )
            shift
            ;;
        --help)
            echo "Usage: $0 [--configuration <CONFIGURATION>] [--targets <TARGETS...>] [--skip-prereqs] [--nopackage] [--docker <IMAGENAME>] [--help]"
            echo ""
            echo "Options:"
            echo "  --configuration <CONFIGURATION>     Build the specified Configuration (Debug or Release, default: Debug)"
            echo "  --skip-prereqs                      Skip checks for pre-reqs in dotnet_install"
            echo "  --nopackage                         Skip packaging targets"
            echo "  --nobuild                           Skip building, showing the command that would be used to build"
            echo "  --docker <IMAGENAME>                Build in Docker using the Dockerfile located in scripts/docker/IMAGENAME"
            echo "  --help                              Display this help message"
            exit 0
            ;;
        *)
            break
            ;;
    esac

    shift
done

# $args array may have empty elements in it.
# The easiest way to remove them is to cast to string and back to array.
# This will actually break quoted arguments, arguments like 
# -test "hello world" will be broken into three arguments instead of two, as it should.
temp="${args[@]}"
args=($temp)

# Load Branch Info
while read line; do
    if [[ $line != \#* ]]; then
        IFS='=' read -ra splat <<< "$line"
        export ${splat[0]}="${splat[1]}"
    fi
done < "$REPOROOT/branchinfo.txt"

# Use a repo-local install directory (but not the artifacts directory because that gets cleaned a lot
[ -z "$DOTNET_INSTALL_DIR" ] && export DOTNET_INSTALL_DIR=$REPOROOT/.dotnet_stage0/$ARCHITECTURE
[ -d "$DOTNET_INSTALL_DIR" ] || mkdir -p $DOTNET_INSTALL_DIR

$REPOROOT/init-tools.sh

# Put stage 0 on the PATH (for this shell only)
PATH="$DOTNET_INSTALL_DIR:$PATH"

# Increases the file descriptors limit for this bash. It prevents an issue we were hitting during restore
FILE_DESCRIPTOR_LIMIT=$( ulimit -n )
if [ $FILE_DESCRIPTOR_LIMIT -lt 1024 ]
then
    echo "Increasing file description limit to 1024"
    ulimit -n 1024
fi

# Disable first run since we want to control all package sources
export DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1

echo "${args[@]}"

if [ $BUILD -eq 1 ]; then
    dotnet build3 build.proj /m /p:Architecture=$ARCHITECTURE "${args[@]}"
else
    echo "Not building due to --nobuild"
    echo "Command that would be run is: 'dotnet build3 build.proj /m /p:Architecture=$ARCHITECTURE ${args[@]}'"
fi