Rando scripts

• Get a PR locally, or create a PR from the current branch. Courtesy of @tamird. TODO: refuse to create a PR if the current branch diverged from the tracker.

#!/usr/bin/env sh

set -eu

error_message() {
  ret=$?
  if [ $ret -ne 0 ]; then
    echo "Something went wrong. Did you push your branch? Did you set a remote tracking branch?"
  fi
  exit $ret
}

trap error_message EXIT

if [ $# == 0 ]; then
  branch_name=$(git rev-parse --abbrev-ref HEAD)
  remote_name=$(git config branch."$branch_name".remote)

  github_forked_org_name=$(git config remote."$remote_name".url | sed -E -e 's,^(https://|git@)github.com[:/]([^\./]+)/[^\./]+(\.git)?,\2,')
  github_origin_proj_url=$(git config remote.origin.url         | sed -E -e 's,^(https://|git@)github.com[:/]([^\./]+/[^\./]+)(\.git)?,\2,')

  url="https://github.com/$github_origin_proj_url/compare/master...$github_forked_org_name:$branch_name?expand="

  open "$url"
else
  hub fetch origin refs/pull/"$1"/head:pr/"$1" && hub checkout pr/"$1"
fi

• Determine the variables which are escaping to the heap for a given file. Courtesy of @nvanbenschoten.

#!/bin/bash

set -e

if [ $# -eq 0 ]
then
        echo "usage: goescape <filename>"
        exit 1
fi

FILEPATH=$1
DIR=$(dirname $FILEPATH)
FILE=$(basename $FILEPATH)

cd $DIR
touch $FILE

go build -gcflags='-m' 2>&1 | \
        grep 'moved to heap' | \
        grep $FILE

cd - > /dev/null