release-dreck

#!/bin/bash

# This release script downloads the latest Go and dreck, sets things up and then calls
# into the Makefile to do the release.

PROG=$(basename $0)

# GetLatestGO download the latest version of Go (or used a cached download from /tmp).
function latestGo {
    TEMP="$1"

    LATEST=$(curl -s https://golang.org/VERSION?m=text)
    GOLANG=https://dl.google.com/go/${LATEST}.linux-amd64.tar.gz
    TAR=$(basename $GOLANG)

    ( cd $TEMP
        if [[ ! -e /tmp/$TAR ]]; then
            echo "$PROG: Downloading: $GOLANG"

            wget -q $GOLANG
            cp $TAR /tmp

        else
            echo "$PROG: Using cached version of: $GOLANG"

            cp /tmp/$TAR .
        fi
    )
}

# setupGo extract Go and export GOROOT and GOPATH to get a compile confined to the tmp dir.
function setupGo {
    TEMP="$1"

    echo "$PROG: Setting up Go in $TEMP"

    ( cd $TEMP
        tar xf $TAR
        export GOROOT=$PWD/go
        PATH=$GOROOT/bin:$PATH
        export GOPATH=$PWD/g
    )
}

# fromGithub download owner/repo from Github into g/src/github.com/owner/repo.
function fromGithub {
    TEMP="$1"
    GITHUB="$2" # OWNER/REPO

    echo "$PROG: Getting $GITHUB"

    ( cd $TEMP
        mkdir -p g/src/github.com/$GITHUB
        cd g/src/github.com/$(dirname $GITHUB) && git clone --depth 1 https://github.com/$GITHUB
    )
}

VERSION=$1
if [[ -z "$VERSION" ]]; then
    echo "$PROG: No version set"
    exit 1
fi

if [[ -z "$GITHUB_ACCESS_TOKEN" ]]; then
    echo "$PROG: No GITHUB_ACCESS_TOKEN set"
    exit 1
fi

GITHUB=miekg/dreck
TEMP=$(mktemp -d); function d1 { rm -rf $TEMP; }; trap d1 EXIT

latestGo $TEMP
setupGo $TEMP
fromGithub $TEMP $GITHUB

echo "$PROG: Building $GITHUB in $TEMP/g/src/github.com/$GITHUB"

( cd $TEMP/g/src/github.com/$GITHUB
    make VERSION=$VERSION release
    #make VERSION=$VERSION upload
)