pubtag

#!/bin/bash

# color support (to make publishing more fun)
# https://unix.stackexchange.com/questions/9957/how-to-check-if-bash-can-print-colors
# examples:
# echo "${c_red}error${c_normal}"
# echo "${c_green}success${c_normal}"
# echo "${c_green}0.052${c_normal} ${c_bold}${c_green}2,816.00 kb${c_normal}"
setup_color() {
  # skip in "never" mode
  if [ x"$COLOR" = never ]; then
    return
  fi
  # check if stdout is a terminal or "always" mode...
  if [ -t 1 -o x"$COLOR" = always ]; then
    # see if it supports colors...
    ncolors=$(tput colors)

    # use colors if available or "always" mode...
    if [ -n "$ncolors" -o x"$COLOR" = always ] && \
       [ $ncolors -ge 8 -o x"$COLOR" = always ]; then
      c_bold="$(tput bold)"
      c_underline="$(tput smul)"
      c_standout="$(tput smso)"
      c_normal="$(tput sgr0)"
      c_black="$(tput setaf 0)"
      c_red="$(tput setaf 1)"
      c_green="$(tput setaf 2)"
      c_yellow="$(tput setaf 3)"
      c_blue="$(tput setaf 4)"
      c_magenta="$(tput setaf 5)"
      c_cyan="$(tput setaf 6)"
      c_white="$(tput setaf 7)"
    fi
  fi
}

# Run a command.  Handle verbose and dry-run options.
#
# run_cmd cmd [args...]
#
run_cmd() {
  if [ $VERBOSE = true -o $DRY_RUN = true ]; then
    echo "$@"
  fi
  if [ $DRY_RUN = false ]; then
    "$@"
    if [ $? -ne 0 ]; then
      echo "$MSG_ERROR: Command failed: $@"
      exit 1
    fi
  fi
}

help_gnu() {
  echo "Usage: pubtag [OPTION] [major | minor | patch]

CHANGELOG.md must be the only modified file in the working tree.

Options:
  -h             Show help.
  -v, --verbose  Verbose execution.
  -C, --color=WHEN
                 Color mode: always, auto, never
                 (default: PUBNPM_COLOR env var or auto).
  -n, --dry-run  Dry run.
  -b, --branch=BRANCH
                 Ensure git branch (default: main, empty string to skip).
" 1>&2
  exit
}

help_not_gnu() {
  echo "Usage: pubtag [OPTION] [major | minor | patch]

CHANGELOG.md must be the only modified file in the working tree.

Options:
  -h  Show help.
  -v  Verbose execution.
  -C  Color mode: always, auto, never (default: PUBNPM_COLOR env var or auto).
  -n  Dry run.
  -b  Ensure git branch (default: main, empty string to skip).
" 1>&2
  exit
}

help() {
  if [ "$GNU_GETOPT" = true ]; then
    help_gnu
  else
    help_not_gnu
  fi
}

# check getopt version
out=$(getopt -T)
if (( $? != 4 )) && [[ -n $out ]]; then
  GNU_GETOPT=false
else
  GNU_GETOPT=true
fi

if [ "$GNU_GETOPT" = true ]; then
  OPTS=`getopt -o hvC:nb: -l help,verbose,dry-run,branch: -n 'pubtag' -- "$@"`
  if [ $? != 0 ] ; then echo "ERROR: Failed parsing options." >&2 ; exit 1 ; fi
  eval set -- "$OPTS"
else
  OPTS=`getopt hvC:nb: $*`
  if [ $? != 0 ] ; then echo "ERROR: Failed parsing options." >&2 ; exit 1 ; fi
  eval set -- "$OPTS"
fi

VERBOSE=false
DRY_RUN=false
BRANCH=main
COLOR=${PUBNPM_COLOR:-auto}

while true; do
  case "$1" in
    -h|--help) help ;;
    -v|--verbose) VERBOSE=true; shift ;;
    -C|--color) COLOR="$2"; shift; shift ;;
    -n|--dry-run) DRY_RUN=true; shift ;;
    -b|--branch) BRANCH="$2"; shift; shift ;;
    -N|--new) NEW=true; shift ;;
    --) shift; break ;;
    *) break ;;
  esac
done

# colors and common text
setup_color
MSG_ERROR=${c_bold}${c_red}ERROR${c_normal}
MSG_WARNING=${c_bold}${c_yellow}WARNING${c_normal}
MSG_NOTE=${c_bold}NOTE${c_normal}

VERSION_TYPE=$1

if [[ ! -e package.json ]]; then
  echo "$MSG_ERROR: package.json file does not exist.  Aborting."
  exit 1
fi

if [ "$VERBOSE" = true ]; then
  echo DRY_RUN=$DRY_RUN
  echo TAG=$TAG
  echo BRANCH=$BRANCH
  echo VERSION_TYPE=$VERSION_TYPE
fi

# check git branch
# always run, even in dry-run mode
if [ "$VERBOSE" = true ]; then
  echo "# $MSG_NOTE: checking git branch"
fi

if [ x"$BRANCH" = x ]; then
  if [ "$VERBOSE" = true ]; then
    echo "# $MSG_NOTE: git branch check skipped via options"
  fi
else
  # newer git
  #GIT_BRANCH=$(git branch --show-current)
  GIT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
  if [ x"$BRANCH" = x"$GIT_BRANCH" ]; then
    if [ "$VERBOSE" = true ]; then
      echo "# $MSG_NOTE: git branch check passed"
    fi
  else
    echo "$MSG_ERROR: git branch check failed (not on \"$BRANCH\")"
    if [ "$DRY_RUN" = true ]; then
      echo "# $MSG_NOTE: Continuing in dry-run mode with failed git branch check"
    else
      exit 1
    fi
  fi
fi

howmany() { echo $#; }
# other is added here to capture a new changelog
MODIFIED_FILES=$(git ls-files --modified --other --exclude-standard)
if [[ $(howmany $MODIFIED_FILES) != "1" ]] || [ "$MODIFIED_FILES" != "CHANGELOG.md" ]; then
  echo "Modified files:" ${MODIFIED_FILES}
  echo "$MSG_ERROR: CHANGELOG.md must be the ONLY modified file.  Aborting."
  exit 1
fi
# if changelog is new, it must be added to tracked files
run_cmd git add CHANGELOG.md
run_cmd git commit -m 'Update changelog.'
run_cmd npm version $VERSION_TYPE -m 'Release %s.'
run_cmd git push
run_cmd git push --tags