get-all-cc-repos

#!/usr/bin/env bash

# Get all repositories in an organization that match a prefix
# (default: CalConnect/cc-)

VERSION="0.0.1"

ORG="${ORG:-CalConnect}"
PREFIX="${PREFIX:-cc-}"

log() {
  echo "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: $*"
} >&2

err() {
  printf "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: \e[1;31mError:\e[m %b\n" "$*"
} >&2

ecdo() {
  log "Running: $*"
  "$@"
}

get-page() {
  local page="${1:-1}"

  # The header and the `--include` flag are for pagination support.
  command curl \
    --include \
    -s \
    "https://api.github.com/orgs/$ORG/repos?page=${page}" \
    --header "Accept: application/vnd.github+json" | \
    process-pagination
}

# Parse curl headers, look for link: <http://...?page=2>; rel="next",
# and get next page if it exists.
process-pagination() {
  local next_page=
  local is_past_headers=

  while read -r line
  do
    if [[ -n $is_past_headers ]]
    then
      echo "$line"
      continue
    fi

    if [[ "$line" =~ ^link:.*page=([0-9]+).*\>\;\ rel=\"next\" ]]
    then
      next_page="${BASH_REMATCH[1]}"
      continue
    fi

    # Start of actual JSON, flag it.
    if [[ "$line" =~ ^\[ ]]
    then
      is_past_headers=1
      echo "$line"
    fi

    continue
  done

  if [[ -n $next_page ]]
  then
    get-page "$next_page"
  fi
}

# Paginated results are in separate arrays,
# so slurp them into one for a more uniform experience.
slurp-into-one-array() {
  command jq -s '[.[][]]'
}

# Filter out only repositories that are prefixed with $PREFIX
filter-prefix() {
  local prefix="$PREFIX"

  # command jq "[.[] | select(.name | startswith(\"$PREFIX\"))]"
  command jq --arg prefix "$prefix" 'map(select(.name | startswith($prefix)))'
}

# Filter out only repositories that have a non-zero size
# Repos with no commits have zero size.
filter-size() {
  command jq 'map(select(.size > 0))'
}

show_usage() {
  local prog_name="\e[1m${0}\e[22m"
  printf "%b" "Usage: $prog_name SUBDIR TARGET_YAML
       $prog_name [-h|--help]
       $prog_name --version

  Get all repositories in an organization that match a prefix

\e[4mFlags:\e[24m
  --version  Print the version and exit
  --help     Print this help message and exit

\e[4mMandatory environment variables:\e[24m
  ORG        The organization to search for repositories
  PREFIX     The prefix (of a repository name) to search repositories by

"

}

main() {

  if [[ "$1" == "-h" || "$1" == "--help" ]]
  then
    show_usage
    exit 0
  elif [[ "$1" == "--version" ]]
  then
    echo "${0} v${VERSION}"
    exit 0
  fi

  # Start from page 1.
  get-page 1 \
    | slurp-into-one-array \
    | filter-prefix \
    | filter-size
}

main "$@"