Implement exercise 'grains'

config.json

@@ -403,6 +403,14 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 8
+      },
+      {
+        "slug": "grains",
+        "name": "Grains",
+        "uuid": "53001741-514b-4675-8842-dfd61d45cb28",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 1
       }
     ]
   },

config.yaml

@@ -366,6 +366,13 @@ exercises:
     prerequisites: []
     difficulty: 8
 
+  - slug: grains
+    name: Grains
+    uuid: 53001741-514b-4675-8842-dfd61d45cb28
+    practices: []
+    prerequisites: []
+    difficulty: 1
+
 tags:
 - execution_mode/compiled
 - execution_mode/interpreted

exercises/practice/grains/.docs/instructions.md

@@ -0,0 +1,15 @@
+# Instructions
+
+Calculate the number of grains of wheat on a chessboard given that the number on each square doubles.
+
+There once was a wise servant who saved the life of a prince.
+The king promised to pay whatever the servant could dream up.
+Knowing that the king loved chess, the servant told the king he would like to have grains of wheat.
+One grain on the first square of a chess board, with the number of grains doubling on each successive square.
+
+There are 64 squares on a chessboard (where square 1 has one grain, square 2 has two grains, and so on).
+
+Write code that shows:
+
+- how many grains were on a given square, and
+- the total number of grains on the chessboard

exercises/practice/grains/.meta/.yamlscript/exercise.mk

@@ -0,0 +1 @@
+YS_VERSION := 0.1.75

exercises/practice/grains/.meta/Makefile

@@ -0,0 +1,28 @@
+SHELL := bash
+
+BASE := $(shell pwd)
+
+export YS_VERSION := 0.1.76
+
+YS_LOCAL_PREFIX := ../../../../.local/v$(YS_VERSION)
+
+YS_LOCAL_BIN := $(YS_LOCAL_PREFIX)/bin
+
+YS_BIN := $(YS_LOCAL_BIN)/ys-$(YS_VERSION)
+
+TEST_FILE ?= $(wildcard *-test.ys)
+
+
+export PATH := $(YS_LOCAL_BIN):$(PATH)
+
+export YSPATH := $(BASE)
+
+
+default:
+
+test: $(YS_BIN)
+	prove -v $(TEST_FILE)
+
+$(YS_BIN):
+	curl -s https://yamlscript.org/install | \
+	  BIN=1 VERSION=$(YS_VERSION) PREFIX=$(YS_LOCAL_PREFIX) bash >/dev/null

exercises/practice/grains/.meta/config.json

@@ -0,0 +1,23 @@
+{
+  "authors": [
+    "ingydotnet"
+  ],
+  "files": {
+    "solution": [
+      "grains.ys"
+    ],
+    "test": [
+      "grains-test.ys",
+      "GNUmakefile",
+      "Makefile",
+      ".yamlscript/exercise.mk",
+      ".yamlscript/exercism-ys-installer"
+    ],
+    "example": [
+      ".meta/grains.ys"
+    ]
+  },
+  "blurb": "Calculate the number of grains of wheat on a chessboard given that the number on each square doubles.",
+  "source": "The CodeRanch Cattle Drive, Assignment 6",
+  "source_url": "https://coderanch.com/wiki/718824/Grains"
+}

exercises/practice/grains/.meta/grains-test.ys

@@ -0,0 +1,59 @@
+#!/usr/bin/env ys-0
+
+require ys::taptest: :all
+
+use: grains
+
+# The final tests of square test error conditions
+# In these cases you should expect an error as is idiomatic for your language
+
+test::
+- name: Grains on square 1
+  code: square(1)
+  want: 1
+  uuid: 9fbde8de-36b2-49de-baf2-cd42d6f28405
+
+- name: Grains on square 2
+  code: square(2)
+  want: 2
+  uuid: ee1f30c2-01d8-4298-b25d-c677331b5e6d
+
+- name: Grains on square 3
+  code: square(3)
+  want: 4
+  uuid: 10f45584-2fc3-4875-8ec6-666065d1163b
+
+- name: Grains on square 4
+  code: square(4)
+  want: 8
+  uuid: a7cbe01b-36f4-4601-b053-c5f6ae055170
+
+- name: Grains on square 16
+  code: square(16)
+  want: 32768
+  uuid: c50acc89-8535-44e4-918f-b848ad2817d4
+
+- name: Grains on square 32
+  code: square(32)
+  want: 2147483648
+  uuid: acd81b46-c2ad-4951-b848-80d15ed5a04f
+
+- name: Square 0 is invalid
+  code: square(0)
+  what: error
+  want: square must be between 1 and 64
+  uuid: 1d47d832-3e85-4974-9466-5bd35af484e3
+
+- name: Negative square is invalid
+  code: square(-1)
+  what: error
+  want: square must be between 1 and 64
+  uuid: 61974483-eeb2-465e-be54-ca5dde366453
+
+- name: Square greater than 64 is invalid
+  code: square(65)
+  what: error
+  want: square must be between 1 and 64
+  uuid: a95e4374-f32c-45a7-a10d-ffec475c012f
+
+done: 9

exercises/practice/grains/.meta/grains.ys

@@ -0,0 +1,7 @@
+!yamlscript/v0
+
+defn square(square):
+  when-not 1 <= square <= 64:
+    die: 'square must be between 1 and 64'
+
+  2 **: square.--

exercises/practice/grains/.meta/tests.toml

@@ -0,0 +1,43 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[9fbde8de-36b2-49de-baf2-cd42d6f28405]
+description = "returns the number of grains on the square -> grains on square 1"
+
+[ee1f30c2-01d8-4298-b25d-c677331b5e6d]
+description = "returns the number of grains on the square -> grains on square 2"
+
+[10f45584-2fc3-4875-8ec6-666065d1163b]
+description = "returns the number of grains on the square -> grains on square 3"
+
+[a7cbe01b-36f4-4601-b053-c5f6ae055170]
+description = "returns the number of grains on the square -> grains on square 4"
+
+[c50acc89-8535-44e4-918f-b848ad2817d4]
+description = "returns the number of grains on the square -> grains on square 16"
+
+[acd81b46-c2ad-4951-b848-80d15ed5a04f]
+description = "returns the number of grains on the square -> grains on square 32"
+
+[c73b470a-5efb-4d53-9ac6-c5f6487f227b]
+description = "returns the number of grains on the square -> grains on square 64"
+
+[1d47d832-3e85-4974-9466-5bd35af484e3]
+description = "returns the number of grains on the square -> square 0 is invalid"
+
+[61974483-eeb2-465e-be54-ca5dde366453]
+description = "returns the number of grains on the square -> negative square is invalid"
+
+[a95e4374-f32c-45a7-a10d-ffec475c012f]
+description = "returns the number of grains on the square -> square greater than 64 is invalid"
+
+[6eb07385-3659-4b45-a6be-9dc474222750]
+description = "returns the total number of grains on the board"

exercises/practice/grains/.yamlscript/exercise.mk

@@ -0,0 +1 @@
+YS_VERSION := 0.1.75

exercises/practice/grains/.yamlscript/exercism-ys-installer

@@ -0,0 +1,127 @@
+#!/env/bin/env bash
+
+set -euo pipefail
+
+intro-prompt() (
+  cat <<...
+--------------------------------------------------------------------------------
+
+This YAMLScript Exercism exercise requires the YAMLScript version $version
+interpreter command file to be installed here:
+
+  $prefix/bin/ys
+
+You can install it by pressing Enter now, or by running this command:
+
+  $make install-ys
+
+This should only take a few seconds and you only need to do this once.
+Other exercises will use the same file.
+
+See https://yamlscript.org/doc/install/ for more YAMLScript installation info.
+
+--------------------------------------------------------------------------------
+
+Would you like to install the 'ys' file now?
+
+...
+
+  printf "Press Enter to install. Ctl-C to Quit."; read -r
+)
+
+main() {
+  setup "$@"
+
+  install-from-local
+
+  $auto && intro-prompt
+
+  installed || install-from-release || true
+  installed || install-from-build || true
+  installed ||
+    die "Installing '$installed' failed. Giving up." \
+        "Consider filing an issue at: $gh_issue_url"
+
+  echo
+  echo 'Success!'
+  echo "$installed is now installed."
+  echo
+}
+
+installed() {
+  [[ -f $installed ]]
+}
+
+install-from-local() {
+  local path
+  path=$(command -v "$ysfq") || true
+  if [[ -f $path ]]; then
+    mkdir -p "$bin"
+    cp "$path" "$bin"/
+    ln -fs "$ysfq" "$bin/ys-0"
+    ln -fs "$ysfq" "$bin/ys"
+    (installed && $auto) && exit
+    true
+  fi
+}
+
+install-from-release() (
+  set -x
+  curl -s https://yamlscript.org/install |
+    BIN=1 VERSION="$version" PREFIX="$prefix" bash
+)
+
+install-from-build() (
+  cat <<...
+
+The binary release installation failed.
+We can attempt to build and install $ysfq now.
+This can take from 1 to 5 minutes to complete.
+
+...
+
+  printf "Press Enter to install. Ctl-C to Quit."; read -r
+
+  [[ -d /tmp && -w /tmp ]] ||
+    die "Can't write to /tmp" \
+        'Giving up.'
+
+  set -x
+
+  rm -fr "$yamlscript_clone"
+
+  git clone --branch="$version" "$yamlscript_repo" "$yamlscript_clone"
+
+  "$make" -C "$yamlscript_clone/ys" install PREFIX="$prefix"
+)
+
+setup() {
+  version=$1
+  prefix=$2
+  make=$3
+  auto=false
+  [[ ${4-} ]] && auto=true
+
+  [[ $version =~ ^0\.1\.[0-9]+$ ]] ||
+    die "Invalid YS_VERSION '$version'"
+
+  bin=$prefix/bin
+  ysfq=ys-$version
+  installed=$bin/$ysfq
+
+  if installed; then
+    echo "'$installed' is already installed."
+    exit
+  fi
+
+  yamlscript_repo=https://github.com/yaml/yamlscript
+  yamlscript_clone=/tmp/yamlscript-exercism
+  gh_issue_url=https://github.com/exercism/yamlscript/issues
+}
+
+die() {
+  printf '%s\n' "$@" >&2
+  exit 1
+}
+
+main "$@"

exercises/practice/grains/GNUmakefile

@@ -0,0 +1,49 @@
+SHELL := bash
+
+BASE := $(shell pwd)
+
+export YS_VERSION := 0.1.76
+
+YS_LOCAL_PREFIX := ../../../.local/v$(YS_VERSION)
+ifeq (,$(shell [[ -d "$(YS_LOCAL_PREFIX)" ]] && echo ok))
+YS_LOCAL_PREFIX := $(shell cd .. && pwd -P)/.local/v$(YS_VERSION)
+endif
+
+YS_LOCAL_BIN := $(YS_LOCAL_PREFIX)/bin
+YS_BIN := $(YS_LOCAL_BIN)/ys-$(YS_VERSION)
+
+YS_INSTALLER := .yamlscript/exercism-ys-installer
+YS_INSTALLER_CMD := \
+  bash $(YS_INSTALLER) $(YS_VERSION) $(YS_LOCAL_PREFIX) $(MAKE)
+
+TEST_FILE ?= $(wildcard *-test.ys)
+
+export PATH := $(YS_LOCAL_BIN):$(PATH)
+export YSPATH := $(BASE)
+
+
+#-------------------------------------------------------------------------------
+default:
+	@echo " No default make rule. Try 'make test'."
+
+test: $(YS_BIN)
+	prove -v $(TEST_FILE)
+
+install-ys:
+	@$(YS_INSTALLER_CMD)
+
+uninstall-ys:
+	rm -fr $(YS_LOCAL_PREFIX)
+
+
+#-------------------------------------------------------------------------------
+ifdef EXERCISM_YAMLSCRIPT_GHA
+$(YS_BIN):
+
+else ifeq (/mnt/,$(dir $(BASE)))
+$(YS_BIN):
+
+else
+$(YS_BIN):
+	@$(YS_INSTALLER_CMD) auto
+endif