script:Add executable permissions to Gist files. (based on https://gist.github.com/tueda/7741614)

gist+x.sh

#! /bin/sh
#
# @file gist+x.sh
#
# Gives executable file permissions to files in a Gist.
#
set -e
prog=`basename "$0"`

# Command line options.
opt_ammnd=false

# Get raw gist id (i.e. works for both d21231acb8f or )
# from https://unix.stackexchange.com/questions/325490/how-to-get-last-part-of-http-link-in-bash/325492
GIST_ID="${1##*/}"

# Wraps "mktemp -d ${GIST_ID}XXXXXXXXXX"
mktemp_d() {(
  umask 077
  {
    # Use mktemp if available.
    dir=`mktemp -d "${GIST_ID}XXXXXXXXXX" 2>/dev/null` && [ -d "$dir" ]
  } || {
    # Fall back on mkdir.
    dir=
    i=0
    while [ $i -lt 100 ]; do
      next_dir=${GIST_ID}$$$i$RANDOM$RANDOM
      if mkdir "$next_dir" >/dev/null 2>&1; then
        dir=$next_dir
        break
      fi
      i=`expr $i + 1`
    done
    [ "x$dir" != x ] && [ -d "$dir" ]
  } || {
    echo "$prog: error: failed to create a temporary directory" >&2
    exit 1
  }
  echo "$dir"
)}

# Parse the command line options.
for opt_arg do
  case $opt_arg in
    --amend)
      opt_amend=:
      ;;
    --)
      shift
      break
      ;;
    -*)
      echo "$prog: error: unknown option \"$opt_arg\"" >&2
      exit 1
      ;;
    *)
      break
      ;;
  esac
  shift
done

if [ $# -eq 0 ]; then
  echo "Usage $prog <id>" >&2
  exit
fi

# Create a working directory.
tmpdir=`mktemp_d "${TMPDIR:-/tmp}/tmp"`
trap 'rm -rf "$tmpdir 2> /dev/null"' 0 1 2 13 15

(
  cd "$tmpdir"
  git clone git@gist.github.com:${GIST_ID}.git || \
  git clone https://gist.github.com/${GIST_ID}.git
  cd ${GIST_ID}
  git config user.name "`git log -1 --pretty=%an`"
  git config user.email "`git log -1 --pretty=%ae`"
  for f in *; do
    if [ -f "$f" ]; then
      chmod +x "$f"
    fi
  done
  git add -u
  if $opt_amend; then
    git commit --amend --allow-empty-message -m ''
    git push -f origin #master
  else
    git commit -m 'Change file permission'
    git push origin #master
  fi
)