ipgo.sh

#!/bin/bash

set -eu

export IPFS_GATEWAY="${IPFS_GATEWAY:-http://127.0.0.1:8080}"

CACHE_DIR="$(go env GOPATH)/pkg/mod/cache"

basepath() {
    echo "${1##${CACHE_DIR}/download/}"
}

sed=`type gsed 2>&1 > /dev/null && echo gsed || echo sed`

cleanpath() {
    echo "$1" | "$sed" 's/[A-Z]/!\L&/g'
}

case "$1" in
    ipfs-lock)
        export GO111MODULE=on

        temp="$(mktemp -d "$CACHE_DIR/.tmpXXXXXXXXX")"
        trap 'rm -rf "$temp"' 0
        go mod download -json > "$temp/info.json"
        jq -r '"VERSION=\(.Version | @sh) INFO=\(.Info | @sh) GOMOD=\(.GoMod | @sh) ZIP=\(.Zip | @sh) modpath=\(.Path | @sh)"' < "$temp/info.json" \
            | while read line; do
            eval "$line"
            echo bundling $modpath/$VERSION

            base="$(dirname "${temp}/bundle/$(basepath "$INFO")")"
            mkdir -p "$base"
            ln -t "$base" "$INFO" "$GOMOD" "$ZIP"
            echo "$VERSION" >> "$base/list"
        done
        go mod graph | while read _ dep; do
            IFS="@" read name ver<<<"$dep"
            name="$(cleanpath "$name")"
            base="$temp/bundle/$name/@v/"
            mkdir -p "$base"
            ln -t "$base" "$CACHE_DIR/download/$name/@v/$ver".{info,mod} 2> /dev/null && echo adding info for $name/$ver || true
        done
        du -hs "$temp/bundle"
        HASH="$(ipfs add -Qr "$temp/bundle")"
        echo "/ipfs/$HASH" > deps.ipfs
        ;;
    *)
        if [[ -e "deps.ipfs" ]]; then
            path="$(< deps.ipfs)"
            export GOPROXY="${IPFS_GATEWAY}$path"
            export GO111MODULE=on
        fi
        exec go "${@}"
esac