Fetches a directory from a Github repository tree URL. I use this to pull individual configuration files when accessing one of my remote machines.

github-fetch-dir.sh

#!/usr/bin/env bash

# Dependencies: gh, jq
# TODO:
# - [ ] Create fallback with bash RegEx to replace jq calls 
# - [ ] Create fallback with curl to replace gh calls

bold=$(tput bold)
normal=$(tput sgr0)

FORMAT="${bold}https://github.com/<user>/<repo>/tree/<branch>/<path>${normal}"
FORMAT_REGEX="https://github.com/([^/]+)/([^/]+)/tree/([^/]+)/(.*)"

for dep in "gh" "jq"; do
  if ! command -v $dep 2>&1 >/dev/null; then
    echo "Command missing: ${bold}$dep${normal}"
    dep_missing=1
  fi
done
if [ $dep_missing -eq 1 ]; then exit 1; fi

if [ -z "$1" ]; then
  echo "Usage: $0 <GitHub directory URL> in format $FORMAT"
  exit 1
fi

download() {
  URL="$1"

  if [[ "$URL" =~ $FORMAT_REGEX ]]; then
    USER="${BASH_REMATCH[1]}"
    REPO="${BASH_REMATCH[2]}"
    BRANCH="${BASH_REMATCH[3]}"
    DIR="${BASH_REMATCH[4]}"
  else
    echo "Invalid URL format. Expected: $FORMAT"
    echo "If you're trying to download the entire repository, just ${bold}git clone${normal} it!"
    exit 1
  fi

  mkdir -p "$DIR"

  API_URL="repos/$USER/$REPO/contents/$DIR?ref=$BRANCH"
  response=$(gh api "$API_URL")

  echo "$response" | jq -r '.[] | select(.type=="file") | .download_url + " " + .path' | while read -r url path; do
    echo "Downloading $path"
    curl -sL "$url" -o "$path"
  done

# Recurse into subdirectories
  echo "$response" | jq -r '.[] | select(.type=="dir") | .path' | while read -r subdir; do
    echo "Downloading $subdir"
    download "https://github.com/$USER/$REPO/tree/$BRANCH/$subdir"
  done
}

download $1

echo "Download complete."