cue modules: move stdlib to pkg/alpha.dagger.io

In preparation for Europa, we will vendor multiple CUE modules:

- `pkg/alpha.dagger.io`: legacy non-europa packages
- `pkg/dagger.io`: core Europa packages
- `pkg/universe.dagger.io`: Europa universe

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

pkg/alpha.dagger.io/bats/tests/testfile/mods/bats-support/.travis.yml

@@ -0,0 +1,7 @@
+language: bash
+before_install:
+  - ./script/install-bats.sh
+before_script:
+  - export PATH="${HOME}/.local/bin:${PATH}"
+script:
+  - bats test

pkg/alpha.dagger.io/bats/tests/testfile/mods/bats-support/CHANGELOG.md

@@ -0,0 +1,37 @@
+# Change Log
+
+All notable changes to this project will be documented in this file.
+This project adheres to [Semantic Versioning](http://semver.org/).
+
+
+## [0.2.0] - 2016-03-22
+
+### Added
+
+- `npm` support
+- Reporting arbitrary failures with `fail()` (moved from `bats-assert`)
+
+### Changed
+
+- Library renamed to `bats-support`
+
+
+## 0.1.0 - 2016-02-16
+
+### Added
+
+- Two-column key-value formatting with `batslib_print_kv_single()`
+- Multi-line key-value formatting with `batslib_print_kv_multi()`
+- Mixed formatting with `batslib_print_kv_single_or_multi()`
+- Header and footer decoration with `batslib_decorate()`
+- Prefixing lines with `batslib_prefix()`
+- Marking lines with `batslib_mark()`
+- Common output function `batslib_err()`
+- Line counting with `batslib_count_lines()`
+- Checking whether a text is one line long with
+  `batslib_is_single_line()`
+- Determining key width for two-column and mixed formatting with
+  `batslib_get_max_single_line_key_width()`
+
+
+[0.2.0]: https://github.com/ztombol/bats-support/compare/v0.1.0...v0.2.0

pkg/alpha.dagger.io/bats/tests/testfile/mods/bats-support/LICENSE

@@ -0,0 +1,116 @@
+CC0 1.0 Universal
+
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+
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+is so judged Affirmer hereby grants to each affected person a royalty-free,
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+affirms that he or she will not (i) exercise any of his or her remaining
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+<http://creativecommons.org/publicdomain/zero/1.0/>

pkg/alpha.dagger.io/bats/tests/testfile/mods/bats-support/README.md

@@ -0,0 +1,128 @@
+*__Important:__ `bats-core` has been renamed to `bats-support`. GitHub
+automatically redirects all references, e.g. submodules and clones will
+continue to work, but you are encouraged to [update][github-rename]
+them. Version numbering continues where `bats-core` left off.*
+
+[github-rename]: https://help.github.com/articles/renaming-a-repository/
+
+- - - - -
+
+# bats-support
+
+[![GitHub license](https://img.shields.io/badge/license-CC0-blue.svg)](https://raw.githubusercontent.com/ztombol/bats-support/master/LICENSE)
+[![GitHub release](https://img.shields.io/github/release/ztombol/bats-support.svg)](https://github.com/ztombol/bats-support/releases/latest)
+[![Build Status](https://travis-ci.org/ztombol/bats-support.svg?branch=master)](https://travis-ci.org/ztombol/bats-support)
+
+`bats-support` is a supporting library providing common functions to
+test helper libraries written for [Bats][bats].
+
+Features:
+- [error reporting](#error-reporting)
+- [output formatting](#output-formatting)
+
+See the [shared documentation][bats-docs] to learn how to install and
+load this library.
+
+If you want to use this library in your own helpers or just want to
+learn about its internals see the developer documentation in the [source
+files](src).
+
+
+## Error reporting
+
+### `fail`
+
+Display an error message and fail. This function provides a convenient
+way to report failure in arbitrary situations. You can use it to
+implement your own helpers when the ones available do not meet your
+needs. Other functions use it internally as well.
+
+```bash
+@test 'fail()' {
+  fail 'this test always fails'
+}
+```
+
+The message can also be specified on the standard input.
+
+```bash
+@test 'fail() with pipe' {
+  echo 'this test always fails' | fail
+}
+```
+
+This function always fails and simply outputs the given message.
+
+```
+this test always fails
+```
+
+
+## Output formatting
+
+Many test helpers need to produce human readable output. This library
+provides a simple way to format simple messages and key value pairs, and
+display them on the standard error.
+
+
+### Simple message
+
+Simple messages without structure, e.g. one-line error messages, are
+simply wrapped in a header and a footer to help them stand out.
+
+```
+-- ERROR: assert_output --
+`--partial' and `--regexp' are mutually exclusive
+--
+```
+
+
+### Key-Value pairs
+
+Some helpers, e.g. [assertions][bats-assert], structure output as
+key-value pairs. This library provides two ways to format them.
+
+When the value is one line long, a pair can be displayed in a columnar
+fashion called ***two-column*** format.
+
+```
+-- output differs --
+expected : want
+actual   : have
+--
+```
+
+When the value is longer than one line, the key and value must be
+displayed on separate lines. First, the key is displayed along with the
+number of lines in the value. Then, the value, indented by two spaces
+for added readability, starting on the next line. This is called
+***multi-line*** format.
+
+```
+-- command failed --
+status : 1
+output (2 lines):
+  Error! Something went terribly wrong!
+  Our engineers are panicing... \`>`;/
+--
+```
+
+Sometimes, for clarity, it is a good idea to display related values also
+in this format, even if they are just one line long.
+
+```
+-- output differs --
+expected (1 lines):
+  want
+actual (3 lines):
+  have 1
+  have 2
+  have 3
+--
+```
+
+<!-- REFERENCES -->
+
+[bats]: https://github.com/sstephenson/bats
+[bats-docs]: https://github.com/ztombol/bats-docs
+[bats-assert]: https://github.com/ztombol/bats-assert

pkg/alpha.dagger.io/bats/tests/testfile/mods/bats-support/load.bash

@@ -0,0 +1,2 @@
+source "$(dirname "${BASH_SOURCE[0]}")/src/output.bash"
+source "$(dirname "${BASH_SOURCE[0]}")/src/error.bash"

pkg/alpha.dagger.io/bats/tests/testfile/mods/bats-support/package.json

@@ -0,0 +1,5 @@
+{
+  "name": "bats-support",
+  "version": "0.2.0",
+  "private": true
+}

pkg/alpha.dagger.io/bats/tests/testfile/mods/bats-support/script/install-bats.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+set -o errexit
+set -o xtrace
+
+git clone --depth 1 https://github.com/sstephenson/bats
+cd bats && ./install.sh "${HOME}/.local" && cd .. && rm -rf bats

pkg/alpha.dagger.io/bats/tests/testfile/mods/bats-support/src/error.bash

@@ -0,0 +1,41 @@
+#
+# bats-support - Supporting library for Bats test helpers
+#
+# Written in 2016 by Zoltan Tombol <zoltan dot tombol at gmail dot com>
+#
+# To the extent possible under law, the author(s) have dedicated all
+# copyright and related and neighboring rights to this software to the
+# public domain worldwide. This software is distributed without any
+# warranty.
+#
+# You should have received a copy of the CC0 Public Domain Dedication
+# along with this software. If not, see
+# <http://creativecommons.org/publicdomain/zero/1.0/>.
+#
+
+#
+# error.bash
+# ----------
+#
+# Functions implementing error reporting. Used by public helper
+# functions or test suits directly.
+#
+
+# Fail and display a message. When no parameters are specified, the
+# message is read from the standard input. Other functions use this to
+# report failure.
+#
+# Globals:
+#   none
+# Arguments:
+#   $@ - [=STDIN] message
+# Returns:
+#   1 - always
+# Inputs:
+#   STDIN - [=$@] message
+# Outputs:
+#   STDERR - message
+fail() {
+  (( $# == 0 )) && batslib_err || batslib_err "$@"
+  return 1
+}

pkg/alpha.dagger.io/bats/tests/testfile/mods/bats-support/src/output.bash

@@ -0,0 +1,279 @@
+#
+# bats-support - Supporting library for Bats test helpers
+#
+# Written in 2016 by Zoltan Tombol <zoltan dot tombol at gmail dot com>
+#
+# To the extent possible under law, the author(s) have dedicated all
+# copyright and related and neighboring rights to this software to the
+# public domain worldwide. This software is distributed without any
+# warranty.
+#
+# You should have received a copy of the CC0 Public Domain Dedication
+# along with this software. If not, see
+# <http://creativecommons.org/publicdomain/zero/1.0/>. 
+#
+
+#
+# output.bash
+# -----------
+#
+# Private functions implementing output formatting. Used by public
+# helper functions.
+#
+
+# Print a message to the standard error. When no parameters are
+# specified, the message is read from the standard input.
+#
+# Globals:
+#   none
+# Arguments:
+#   $@ - [=STDIN] message
+# Returns:
+#   none
+# Inputs:
+#   STDIN - [=$@] message
+# Outputs:
+#   STDERR - message
+batslib_err() {
+  { if (( $# > 0 )); then
+      echo "$@"
+    else
+      cat -
+    fi
+  } >&2
+}
+
+# Count the number of lines in the given string.
+#
+# TODO(ztombol): Fix tests and remove this note after #93 is resolved!
+# NOTE: Due to a bug in Bats, `batslib_count_lines "$output"' does not
+#       give the same result as `${#lines[@]}' when the output contains
+#       empty lines.
+#       See PR #93 (https://github.com/sstephenson/bats/pull/93).
+#
+# Globals:
+#   none
+# Arguments:
+#   $1 - string
+# Returns:
+#   none
+# Outputs:
+#   STDOUT - number of lines
+batslib_count_lines() {
+  local -i n_lines=0
+  local line
+  while IFS='' read -r line || [[ -n $line ]]; do
+    (( ++n_lines ))
+  done < <(printf '%s' "$1")
+  echo "$n_lines"
+}
+
+# Determine whether all strings are single-line.
+#
+# Globals:
+#   none
+# Arguments:
+#   $@ - strings
+# Returns:
+#   0 - all strings are single-line
+#   1 - otherwise
+batslib_is_single_line() {
+  for string in "$@"; do
+    (( $(batslib_count_lines "$string") > 1 )) && return 1
+  done
+  return 0
+}
+
+# Determine the length of the longest key that has a single-line value.
+#
+# This function is useful in determining the correct width of the key
+# column in two-column format when some keys may have multi-line values
+# and thus should be excluded.
+#
+# Globals:
+#   none
+# Arguments:
+#   $odd - key
+#   $even - value of the previous key
+# Returns:
+#   none
+# Outputs:
+#   STDOUT - length of longest key
+batslib_get_max_single_line_key_width() {
+  local -i max_len=-1
+  while (( $# != 0 )); do
+    local -i key_len="${#1}"
+    batslib_is_single_line "$2" && (( key_len > max_len )) && max_len="$key_len"
+    shift 2
+  done
+  echo "$max_len"
+}
+
+# Print key-value pairs in two-column format.
+#
+# Keys are displayed in the first column, and their corresponding values
+# in the second. To evenly line up values, the key column is fixed-width
+# and its width is specified with the first parameter (possibly computed
+# using `batslib_get_max_single_line_key_width').
+#
+# Globals:
+#   none
+# Arguments:
+#   $1 - width of key column
+#   $even - key
+#   $odd - value of the previous key
+# Returns:
+#   none
+# Outputs:
+#   STDOUT - formatted key-value pairs
+batslib_print_kv_single() {
+  local -ir col_width="$1"; shift
+  while (( $# != 0 )); do
+    printf '%-*s : %s\n' "$col_width" "$1" "$2"
+    shift 2
+  done
+}
+
+# Print key-value pairs in multi-line format.
+#
+# The key is displayed first with the number of lines of its
+# corresponding value in parenthesis. Next, starting on the next line,
+# the value is displayed. For better readability, it is recommended to
+# indent values using `batslib_prefix'.
+#
+# Globals:
+#   none
+# Arguments:
+#   $odd - key
+#   $even - value of the previous key
+# Returns:
+#   none
+# Outputs:
+#   STDOUT - formatted key-value pairs
+batslib_print_kv_multi() {
+  while (( $# != 0 )); do
+    printf '%s (%d lines):\n' "$1" "$( batslib_count_lines "$2" )"
+    printf '%s\n' "$2"
+    shift 2
+  done
+}
+
+# Print all key-value pairs in either two-column or multi-line format
+# depending on whether all values are single-line.
+#
+# If all values are single-line, print all pairs in two-column format
+# with the specified key column width (identical to using
+# `batslib_print_kv_single').
+#
+# Otherwise, print all pairs in multi-line format after indenting values
+# with two spaces for readability (identical to using `batslib_prefix'
+# and `batslib_print_kv_multi')
+#
+# Globals:
+#   none
+# Arguments:
+#   $1 - width of key column (for two-column format)
+#   $even - key
+#   $odd - value of the previous key
+# Returns:
+#   none
+# Outputs:
+#   STDOUT - formatted key-value pairs
+batslib_print_kv_single_or_multi() {
+  local -ir width="$1"; shift
+  local -a pairs=( "$@" )
+
+  local -a values=()
+  local -i i
+  for (( i=1; i < ${#pairs[@]}; i+=2 )); do
+    values+=( "${pairs[$i]}" )
+  done
+
+  if batslib_is_single_line "${values[@]}"; then
+    batslib_print_kv_single "$width" "${pairs[@]}"
+  else
+    local -i i
+    for (( i=1; i < ${#pairs[@]}; i+=2 )); do
+      pairs[$i]="$( batslib_prefix < <(printf '%s' "${pairs[$i]}") )"
+    done
+    batslib_print_kv_multi "${pairs[@]}"
+  fi
+}
+
+# Prefix each line read from the standard input with the given string.
+#
+# Globals:
+#   none
+# Arguments:
+#   $1 - [=  ] prefix string
+# Returns:
+#   none
+# Inputs:
+#   STDIN - lines
+# Outputs:
+#   STDOUT - prefixed lines
+batslib_prefix() {
+  local -r prefix="${1:-  }"
+  local line
+  while IFS='' read -r line || [[ -n $line ]]; do
+    printf '%s%s\n' "$prefix" "$line"
+  done
+}
+
+# Mark select lines of the text read from the standard input by
+# overwriting their beginning with the given string.
+#
+# Usually the input is indented by a few spaces using `batslib_prefix'
+# first.
+#
+# Globals:
+#   none
+# Arguments:
+#   $1 - marking string
+#   $@ - indices (zero-based) of lines to mark
+# Returns:
+#   none
+# Inputs:
+#   STDIN - lines
+# Outputs:
+#   STDOUT - lines after marking
+batslib_mark() {
+  local -r symbol="$1"; shift
+  # Sort line numbers.
+  set -- $( sort -nu <<< "$( printf '%d\n' "$@" )" )
+
+  local line
+  local -i idx=0
+  while IFS='' read -r line || [[ -n $line ]]; do
+    if (( ${1:--1} == idx )); then
+      printf '%s\n' "${symbol}${line:${#symbol}}"
+      shift
+    else
+      printf '%s\n' "$line"
+    fi
+    (( ++idx ))
+  done
+}
+
+# Enclose the input text in header and footer lines.
+#
+# The header contains the given string as title. The output is preceded
+# and followed by an additional newline to make it stand out more.
+#
+# Globals:
+#   none
+# Arguments:
+#   $1 - title
+# Returns:
+#   none
+# Inputs:
+#   STDIN - text
+# Outputs:
+#   STDOUT - decorated text
+batslib_decorate() {
+  echo
+  echo "-- $1 --"
+  cat -
+  echo '--'
+  echo
+}