feat: slugify a value

.github/workflows/slugify.yaml

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+name: Slugify testing
+on: [push]
+jobs:
+  slugify:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      # Test 1
+      - name: Slugify key only
+        uses: ./
+        with:
+          key: KEY_TEST
+        env:
+          KEY_TEST: Key_Test.values
+      - name: Test result of key only
+        run: |
+          [[ "${{ env.KEY_TEST }}" == "Key_Test.values" ]]
+          [[ "${{ env.KEY_TEST_SLUG }}" == "key_test.values" ]]
+          [[ "${{ env.KEY_TEST_SLUG_CS }}" == "Key_Test.values" ]]
+          [[ "${{ env.KEY_TEST_SLUG_URL }}" == "key_test-values" ]]
+          [[ "${{ env.KEY_TEST_SLUG_URL_CS }}" == "Key_Test-values" ]]
+
+      # Test 2
+      - name: Slugify key/value
+        uses: ./
+        with:
+          key: KEY_VALUE_TEST
+          value: refs/pulls/feat/-----Some----Changes_to.be------
+      - name: Test result of key only
+        run: |
+          [[ "${{ env.KEY_VALUE_TEST }}" == "refs/pulls/feat/-----Some----Changes_to.be------" ]]
+          [[ "${{ env.KEY_VALUE_TEST_SLUG }}" == "feat-some-changes_to.be" ]]
+          [[ "${{ env.KEY_VALUE_TEST_SLUG_CS }}" == "feat-Some-Changes_to.be" ]]
+          [[ "${{ env.KEY_VALUE_TEST_SLUG_URL }}" == "feat-some-changes_to-be" ]]
+          [[ "${{ env.KEY_VALUE_TEST_SLUG_URL_CS }}" == "feat-Some-Changes_to-be" ]]
+
+      # Release
+      - name: Release this GitHub Action
+        uses: rlespinasse/release-that@v1.x

CODE_OF_CONDUCT.md

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+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+romain.lespinasse@gmail.com.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.

README.md

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+# Slugify
+
+> Github Action to slugify a value
+
+Produce some `slug`-ed environment variables based on the input one.
+
+- `<env name>_SLUG`
+
+  - put the variable content in lower case
+  - replace any character by `-` except `0-9`, `a-z`, `.`, and `_`
+  - remove leading and trailing `-` character
+  - limit the string size to 63 characters
+
+- `<env name>_SLUG_CS`
+
+  - like `<env name>_SLUG` but the content is not put in lower case
+
+- `<env name>_SLUG_URL` (or `<env name>_SLUG_URL_CS`)
+
+  - like `<env name>_SLUG` (or `<env name>_SLUG_CS`) with the `.` character also replaced by `-`
+
+## Usage
+
+- Slugify a value and store it using a key
+
+  ```yaml
+  - uses: rlespinasse/slugify@v1.x
+    with:
+      key: KEY_NAME
+      value: value_to_slugify
+  ```
+
+  Will make available
+
+  - `KEY_NAME_SLUG`
+  - `KEY_NAME_SLUG_CS`
+  - `KEY_NAME_SLUG_URL`
+  - `KEY_NAME_SLUG_URL_CS`
+
+- Slugify the value of an environment variable
+
+  ```yaml
+  - uses: rlespinasse/slugify@v1.x
+    with:
+      key: EXISTING_ENV_VAR
+  ```
+
+  Will make available
+
+  - `EXISTING_ENV_VAR_SLUG`
+  - `EXISTING_ENV_VAR_SLUG_CS`
+  - `EXISTING_ENV_VAR_SLUG_URL`
+  - `EXISTING_ENV_VAR_SLUG_URL_CS`

action.yml

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+name: "Slugify"
+description: "Github Action to slugify a value"
+author: "Romain Lespinasse"
+inputs:
+  key:
+    description: "Environment variable that will hold the value and serve as prefix to slugified value"
+    required: true
+  value:
+    description: "Value to slugify"
+    required: false
+branding:
+  icon: "crop"
+  color: "gray-dark"
+runs:
+  using: "composite"
+  steps:
+    - run: ${{ github.action_path }}/slugify.sh
+      shell: bash
+      env:
+        INPUT_KEY: ${{ inputs.key }}
+        INPUT_VALUE: ${{ inputs.value }}

slugify.sh

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+#!/usr/bin/env bash
+
+KEY=${INPUT_KEY^^}
+CS_VALUE=${INPUT_VALUE:-${!INPUT_KEY}}
+VALUE=${CS_VALUE,,}
+
+slug() {
+  echo "$1" |
+    sed -r 's#refs/[^\/]*/##;s/[^a-zA-Z0-9._]+/-/g;s/^-*//;s/-*$//' |
+    cut -c1-63
+}
+
+slug_url() {
+  echo "$1" |
+    sed -r 's#refs/[^\/]*/##;s/[^a-zA-Z0-9_]+/-/g;s/^-//;s/-$//' |
+    cut -c1-63
+}
+
+{
+  echo "${KEY}=${CS_VALUE}"
+  echo "${KEY}_SLUG=$(slug "$VALUE")"
+  echo "${KEY}_SLUG_CS=$(slug "$CS_VALUE")"
+  echo "${KEY}_SLUG_URL=$(slug_url "$VALUE")"
+  echo "${KEY}_SLUG_URL_CS=$(slug_url "$CS_VALUE")"
+} >>"$GITHUB_ENV"