Keeping a set of gist-files up to date

update-gists.sh

#!/usr/bin/env bash

# Source: https://gist.github.com/7d4950d4d4c046fcd3162fddaba0dca5
#
# * Works with `gist` CLI (https://github.com/defunkt/gist)
# * Files are created manually
# * Requires login: `gist --login`
# * Gist URL: https://gist.github.com/<gist id>
# * Raw URL: https://gist.githubusercontent.com/<user name>/<gist id>/raw/<file name>

# List your files here, one file per line:
# Format: <gist id><blank space><file name>
MY_FILES=$(cat <<-END
6fec92c99a14b0f2e2f6f03d78a8b830 myfile-something-foo.conf
14c376e5e2f6f03d78a8b8306fec92c9 application.sh
e2f6fb0f2121c4f1c391d4c376e5e291 public-data.json
76e5e2f6f03d78a8b8306fec92f1c4f1 feed.rss
91c3f6f03d78a2f03d88306fec2c9940 hellow-world.css
END
)

# --------------------------------------------------------------
# --------------------------------------------------------------
# --------------------------------------------------------------

update()
{
  FILE=$1
  ID=$2
  DOTS='.....................................................'
  CHECKSUM=".$FILE._gistcs"
  if [ ! -f "$CHECKSUM" ]; then touch "$CHECKSUM"; fi
  PREV=$(cat "$CHECKSUM")
  CURR=$(cat "$FILE" | shasum -b | cut -d' ' -f 1)
  printf "[%s] %s %s" $ID $FILE "${DOTS:${#FILE}}"
  if [ "$CURR" != "$PREV" ]; then
    printf " updating ... "
    gist -u "$ID" "$FILE" && printf "$CURR" > "$CHECKSUM"
  else
    echo " up to date"
  fi
}

LIST=()
for VALUE in $MY_FILES; do
  LIST+=($VALUE)
done

while [ ${#LIST[@]} -gt 0 ]; do
  ID=${LIST[0]}
  FILE=${LIST[1]}
  LIST=("${LIST[@]:2}")
  update "$FILE" "$ID"
done