GitHub backup script

github-backup.sh

#!/usr/bin/env bash
# GitHub Backup Script
# Backs up all accessible repositories (public & private) to organized ZIP files
set -euo pipefail

# Terminal colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[1;34m'
NC='\033[0m'

# Check dependencies
for cmd in curl jq git zip; do
  command -v "$cmd" >/dev/null 2>&1 || {
    echo -e "${RED}❌ Missing dependency: $cmd${NC}" >&2
    exit 1
  }
done

if [[ -z "${GITHUB_TOKEN:-}" ]]; then
  echo -e "${RED}❌ Please export GITHUB_TOKEN first${NC}" >&2
  exit 1
fi

# Configuration
PER_PAGE=100
TODAY=$(date +%F)
BACKUP_DIR="github-backups/$TODAY"
mkdir -p "$BACKUP_DIR"

echo -e "${BLUE}📦 Output directory:${NC} $BACKUP_DIR"

gh_api() {
  local url=$1
  if ! curl -sSfL \
    -H "Authorization: Bearer $GITHUB_TOKEN" \
    -H "Accept: application/vnd.github+json" \
    -H "User-Agent: github-backup-script" \
    "$url"; then
    echo -e "${RED}❌ API request failed: $url${NC}" >&2
    return 1
  fi
}

list_repos() {
  local page=1
  local repos=()

  while true; do
    local resp
    resp=$(gh_api "https://api.github.com/user/repos?per_page=$PER_PAGE&page=$page&type=all")

    local names
    names=$(echo "$resp" | jq -r '.[] | select(.archived == false) | .full_name')
    if [[ -z "$names" ]]; then
      break
    fi

    while IFS= read -r name; do
      [[ -n "$name" ]] && repos+=("$name")
    done <<< "$names"
    ((page++))
  done

  printf '%s\n' "${repos[@]}"
}

backup_repo() {
  local full_name=$1
  local owner repo
  owner=${full_name%%/*}
  repo=${full_name##*/}

  local owner_dir="$BACKUP_DIR/$owner"
  mkdir -p "$owner_dir"

  local repo_dir="$owner_dir/$repo"

  echo -e "${YELLOW}🔄  Cloning ${full_name}…${NC}"
  git clone "https://github.com/${full_name}.git" "$repo_dir" --quiet --depth=1

  echo -e "${GREEN}💾  Archiving ${full_name} → ${owner}/${repo}.zip${NC}"
  (cd "$repo_dir" && zip -qr "../${repo}.zip" .)

  rm -rf "$repo_dir"
}

echo -e "${BLUE}🔑 Authenticating & fetching repo list…${NC}"

ALL_REPOS=()
while IFS= read -r repo; do
  [[ -n "$repo" ]] && ALL_REPOS+=("$repo")
done < <(list_repos)

TOTAL=${#ALL_REPOS[@]}
echo -e "${BLUE}📚 Found $TOTAL repositories${NC}"

COUNT=0
for r in "${ALL_REPOS[@]}"; do
  backup_repo "$r" && ((COUNT++))
done

echo -e "${GREEN}✅ Backup complete: ${COUNT}/${TOTAL} repos archived${NC}"
echo -e "${BLUE}📁 Everything stored in $BACKUP_DIR${NC}"