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hello-world, with scripts and workflows
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‎.github/workflows/pr.yml.not_active‎

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name: PR
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on:
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pull_request:
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jobs:
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test:
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runs-on: ubuntu-24.04
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steps:
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- uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
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- uses: leafo/gh-actions-lua@8c9e175e7a3d77e21f809eefbee34a19b858641b
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with:
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luaVersion: 5.4
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- uses: leafo/gh-actions-luarocks@97053c556d6ce2c8e26eb7ac93743437c7af7248
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- name: build
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run: |
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luarocks install busted
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luarocks install moonscript
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- name: Run tests for changed/added exercises
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env:
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GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
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run: |
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pr_endpoint=$(jq -r '"repos/\(.repository.full_name)/pulls/\(.pull_request.number)"' "$GITHUB_EVENT_PATH")
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gh api "$pr_endpoint/files" --paginate --jq '
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map(
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select(.filename | match("\\.odin$")) |
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.filename |
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match("exercises/practice/([^/]+)/") |
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.captures[0].string
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) | unique[]
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' | xargs -r -L1 bin/test-one

‎.github/workflows/test.yml‎

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# This workflow will verify the exercises in the repository.
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#
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# Requires scripts:
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# - bin/verify-exercises
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name: Test
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on:
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push:
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branches: [main]
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pull_request:
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workflow_dispatch:
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branches:
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- main
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jobs:
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verify_exercises:
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# TODO: replace with another image if required to run the tests (optional)
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test:
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runs-on: ubuntu-24.04
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steps:
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- name: Checkout repository
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uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
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- uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
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- uses: leafo/gh-actions-lua@8c9e175e7a3d77e21f809eefbee34a19b858641b
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with:
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luaVersion: 5.4
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# TODO: setup any tooling that is required to run the tests (optional)
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# E.g. install a specific version of a programming language
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# E.g. install packages via apt/apk/yum/etc.
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# Find GitHub Actions to setup tooling here:
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# - https://github.com/actions/?q=setup&type=&language=
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# - https://github.com/actions/starter-workflows/tree/main/ci
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# - https://github.com/marketplace?type=actions&query=setup
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# - name: Use <setup tooling>
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# uses: <action to setup tooling>
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- uses: leafo/gh-actions-luarocks@97053c556d6ce2c8e26eb7ac93743437c7af7248
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# TODO: install any dependencies (optional)
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# E.g. npm install, bundle install, etc.
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# - name: Install project dependencies
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# run: <install dependencies>
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- name: build
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run: |
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luarocks install busted
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luarocks install moonscript
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- name: Verify all exercises
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run: bin/verify-exercises
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- name: test
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run: |
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bin/test-all

‎bin/add-practice-exercise‎

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@@ -20,7 +20,7 @@ help_and_exit() {
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echo >&2 "Scaffold the files for a new practice exercise."
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echo >&2 "Usage: ${scriptname} [-h] [-a author] [-d difficulty] <exercise-slug>"
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echo >&2 "Where: author is the GitHub username of the exercise creator."
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echo >&2 "Where: difficulty is between 1 (easiest) to 10 (hardest)."
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echo >&2 " : difficulty is between 1 (easiest) to 10 (hardest)."
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exit 1
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}
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@@ -37,6 +37,7 @@ require_files_template() {
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}
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required_tool jq
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required_tool curl
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require_files_template "solution"
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require_files_template "test"
@@ -45,7 +46,7 @@ require_files_template "example"
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[[ -f ./bin/fetch-configlet ]] || die "Run this script from the repo's root directory."
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author=''
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difficulty='1'
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difficulty='4'
4950
while getopts :ha:d: opt; do
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case $opt in
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h) help_and_exit ;;
@@ -59,6 +60,7 @@ shift "$((OPTIND - 1))"
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(( $# >= 1 )) || help_and_exit
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slug="${1}"
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snake_slug=${1//-/_}
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if [[ -z "${author}" ]]; then
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read -rp 'Your GitHub username: ' author
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./bin/fetch-configlet
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./bin/configlet create --practice-exercise "${slug}" --author "${author}" --difficulty "${difficulty}"
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filter='.exercises.practice |= sort_by(.difficulty, (.name|ascii_upcase))'
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jq "${filter}" config.json > config.sorted && mv config.sorted config.json
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exercise_dir="exercises/practice/${slug}"
71-
files=$(jq -r --arg dir "${exercise_dir}" '.files | to_entries | map({key: .key, value: (.value | map("'"'"'" + $dir + "/" + . + "'"'"'") | join(" and "))}) | from_entries' "${exercise_dir}/.meta/config.json")
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files=$(
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jq -r --arg dir "${exercise_dir}" --arg q "'" '
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.files
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| to_entries
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| map({key: .key, value: (.value | map($q + $dir + "/" + . + $q) | join(" and "))})
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| from_entries
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' "${exercise_dir}/.meta/config.json"
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)
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cp exercises/practice/hello-world/.busted "exercises/practice/${slug}/.busted"
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mkdir -p canonical-data
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github="https://raw.githubusercontent.com/exercism/problem-specifications/refs/heads/main/exercises/${slug}/canonical-data.json"
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curl -s -o "canonical-data/${slug}.json" "$github"
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camel_slug=$(perl -pe 's/(?:^|-)([a-z])/\u$1/g' <<< "$slug")
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cat << SPEC_GENERATOR > exercises/practice/${slug}/.meta/spec_generator.moon
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{
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module_name: '${camel_slug}',
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-- or, module_imports: {'func1', 'func2', ...},
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-- optional:
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test_helpers: [[
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A block of code here, indented 2 spaces
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]]
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generate_test: (case, level) ->
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local lines
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-- you may want to "switch case.property" here
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lines = {
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"result = ${camel_slug}.#{case.property} #{case.input}",
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"expected = #{quote case.expected}",
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"assert.are.equal expected, result"
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}
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table.concat [indent line, level for line in *lines], '\n'
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}
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SPEC_GENERATOR
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73117
cat << NEXT_STEPS
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Your next steps are:
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- Create the test suite in $(jq -r '.test' <<< "${files}")
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- The tests should be based on the canonical data at 'https://github.com/exercism/problem-specifications/blob/main/exercises/${slug}/canonical-data.json'
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- Any test cases you don't implement, mark them in 'exercises/practice/${slug}/.meta/tests.toml' with "include = false"
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- Create the example solution in $(jq -r '.example' <<< "${files}")
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- Verify the example solution passes the tests by running 'bin/verify-exercises ${slug}'
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- Create the stub solution in $(jq -r '.solution' <<< "${files}")
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- Update the 'difficulty' value for the exercise's entry in the 'config.json' file in the repo's root
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- Validate CI using 'bin/configlet lint' and 'bin/configlet fmt'
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1. Create the test suite ==> $(jq -r '.test' <<< "${files}")
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- A stub test generator awaits you --> 'exercises/practice/${slug}/.meta/spec_generator.moon'
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- If you don't want it, delete it.
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- Otherwise, populate it and run it --> $ bin/generate-spec ${slug}
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- The tests should be based on the canonical data --> ./canonical-data/${slug}.json
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- Any test cases you don't implement, mark them in 'exercises/practice/${slug}/.meta/tests.toml' with "include = false"
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2. Create the example solution ==> $(jq -r '.example' <<< "${files}")
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3. Verify the example solution passes the tests ==> $ bin/test-one ${slug}
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4. Create the stub solution ==> $(jq -r '.solution' <<< "${files}")
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5. Update the 'difficulty' value for the exercise's entry in the 'config.json' file in the repo's root
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6. Validate CI using 'bin/configlet lint' and 'bin/configlet fmt'
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NEXT_STEPS

‎bin/generate-spec‎

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#!/usr/bin/env moon
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-- ref: https://github.com/exercism/lua/blob/main/bin/generate-spec
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4+
require 'moonscript'
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json = (require 'dkjson').use_lpeg!
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-- import p from require 'moon'
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8+
local exercise_name, exercise_directory, spec_generator, included_tests -- forward declarations
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10+
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file_exists = (path) ->
12+
f = io.open path, 'r'
13+
if f
14+
f\close!
15+
true
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else
17+
false
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20+
read_file = (path) ->
21+
f = assert io.open path, 'r'
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contents = f\read '*a'
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f\close!
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contents
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26+
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write_file = (path, contents) ->
28+
f = assert io.open path, 'w'
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f\write contents
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f\close!
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included_tests_from_toml = (path) ->
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included = {}
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local uuid, last_uuid
36+
line_no = 0
37+
38+
for line in io.lines(path)
39+
line_no += 1
40+
for uuid in line\gmatch('%[([%x%-]+)%]')
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last_uuid = uuid
42+
included[uuid] = true
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44+
if line\match('^include%s*=%s*false')
45+
included[last_uuid] = nil
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47+
included
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50+
export indent, quote -- mark as global so spec_generators can see them
51+
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indent = (text, level) -> string.rep(' ', level) .. text
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54+
quote = (str) ->
55+
if str\find "'"
56+
"\"#{str\gsub '"', '\\"'}\""
57+
else
58+
"'#{str}'"
59+
60+
61+
test_cmd = 'it'
62+
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process = (node, level=0) ->
64+
if node.cases
65+
output = {}
66+
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if node.description
68+
table.insert output, indent("describe #{quote node.description}, ->", level)
69+
else
70+
table.insert output, indent("describe '#{exercise_name}', ->", level)
71+
72+
if spec_generator.test_helpers
73+
table.insert output, spec_generator.test_helpers
74+
75+
cases = {}
76+
for case in *node.cases
77+
if not case.uuid or included_tests[case.uuid]
78+
table.insert cases, process(case, level + 1)
79+
80+
table.insert output, table.concat(cases, '\n')
81+
82+
return table.concat output, '\n'
83+
84+
else -- no "cases" member
85+
test = "#{test_cmd} #{quote node.description}, ->\n#{spec_generator.generate_test(node, level + 1)}\n"
86+
test_cmd = 'pending'
87+
return indent test, level
88+
89+
-- ----------------------------------------------------------
90+
-- "main"
91+
-- ----------------------------------------------------------
92+
exercise_name = arg[1]
93+
snake_name = exercise_name\gsub("-", "_")
94+
95+
-- to differentiate from the lua rock "say" required by busted.
96+
if snake_name == 'say'
97+
snake_name = './say'
98+
99+
exercise_directory = 'exercises/practice/' .. exercise_name
100+
101+
canonical_data_url = "https://raw.githubusercontent.com/exercism/problem-specifications/main/exercises/#{exercise_name}/canonical-data.json"
102+
canonical_data_path = "canonical-data/#{exercise_name}.json"
103+
104+
assert os.execute('mkdir -p "$(dirname "' .. canonical_data_path .. '")"')
105+
assert os.execute('curl "' .. canonical_data_url .. '" -s -o "' .. canonical_data_path .. '"')
106+
107+
canonical_data = json.decode read_file canonical_data_path
108+
109+
tests_toml_path = exercise_directory .. '/.meta/tests.toml'
110+
included_tests = included_tests_from_toml tests_toml_path
111+
112+
package.moonpath = "#{exercise_directory}/.meta/?.moon;#{package.moonpath}"
113+
spec_generator = require 'spec_generator'
114+
115+
local spec
116+
if spec_generator.module_name
117+
spec = "#{spec_generator.module_name} = require '#{snake_name}'"
118+
elseif spec_generator.module_imports
119+
spec = "import #{table.concat spec_generator.module_imports, ', '} from require '#{snake_name}'"
120+
else
121+
error 'spec_generator is missing both "module_name" and "module_imports"'
122+
123+
spec ..= "\n\n" .. process(canonical_data)
124+
125+
spec_path = exercise_directory .. '/' .. snake_name .. '_spec.moon'
126+
write_file spec_path, spec
127+
128+
print "Created #{spec_path}"

‎bin/test-all‎

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#!/usr/bin/env bash
2+
3+
start=$SECONDS
4+
5+
unset CDPATH
6+
7+
script_dir=$(realpath "$(dirname "$0")")
8+
9+
cd "${script_dir}/../exercises/practice" || exit 4
10+
result=0
11+
count=0
12+
13+
for exercise in *; do
14+
[[ -d $exercise ]] || continue
15+
16+
"$script_dir"/test-one "$exercise" || (( ++result ))
17+
(( ++count ))
18+
done
19+
20+
echo
21+
echo "$count exercises tested in $(( SECONDS - start )) seconds."
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exit $result

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