!misc: project refactor and new module structure

New crates:
 - nginx-sys - is a separate crate for nginx bindings
 - ngx - crate allows to use a higher-level abstractions to build modules in rust
- examples - a number of examples how to develop nginx dynamic modules with Rust

ngx v0.3.0-beta now has more rust idiomatic code and allows to build modules completely in rust without any C code

Co-authored-by: Matthew Yacobucci <m.yacobucci@f5.com> Elijah Zupancic <e.zupancic@f5.com>

Author: ivanitskiy

.cargo/audit.toml

@@ -0,0 +1,35 @@
+# audit config file
+#
+# It may be located in the user home (`~/.cargo/audit.toml`) or in the project
+# root (`.cargo/audit.toml`).
+#
+# All of the options which can be passed via CLI arguments can also be
+# permanently specified in this file.
+# It may be located in the user home (`~/.cargo/audit.toml`) or in the project
+# root (`.cargo/audit.toml`).
+
+[advisories]
+ignore = ["RUSTSEC-2020-0071"]
+
+# # Advisory Database Configuration
+# [database]
+# path = "~/.cargo/advisory-db" # Path where advisory git repo will be cloned
+# url = "https://github.com/RustSec/advisory-db.git" # URL to git repo
+# fetch = true # Perform a `git fetch` before auditing (default: true)
+# stale = false # Allow stale advisory DB (i.e. no commits for 90 days, default: false)
+
+# # Output Configuration
+# [output]
+# deny = ["unmaintained"] # exit on error if unmaintained dependencies are found
+# format = "terminal" # "terminal" (human readable report) or "json"
+# quiet = false # Only print information on error
+# show_tree = true # Show inverse dependency trees along with advisories (default: true)
+
+# # Target Configuration
+# [target]
+# arch = "x86_64" # Ignore advisories for CPU architectures other than this one
+# os = "linux" # Ignore advisories for operating systems other than this one
+
+# [yanked]
+# enabled = true # Warn for yanked crates in Cargo.lock (default: true)
+# update_index = true # Auto-update the crates.io index (default: true)

.cargo/config.toml

@@ -0,0 +1,8 @@
+#
+# https://stackoverflow.com/questions/28124221/error-linking-with-cc-failed-exit-code-1
+#
+[target.x86_64-apple-darwin]
+rustflags = [
+  "-C", "link-arg=-undefined",
+  "-C", "link-arg=dynamic_lookup",
+]

.dockerignore

@@ -0,0 +1,24 @@
+**/.idea
+.cargo
+.dockerignore
+.fossa.yml
+.git
+.github
+CHANGELOG.md
+CODE_OF_CONDUCT.md
+CONTRIBUTING.md
+Containerfile.debian
+Dockerfile
+GNUmakefile
+LICENSE.txt
+README.md
+SECURITY.md
+build
+
+.vscode/**
+
+**/target
+target
+
+.cache/
+.nginx/

.fossa.yml

@@ -0,0 +1,11 @@
+version: 3
+
+project:
+  id: github.com/nginxinc/ngx-rust
+  name: ngx-rust
+  url: github.com/nginxinc/ngx-rust
+
+paths:
+  exclude:
+    - ./cache
+    - ./nginx

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,29 @@
+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. See my project that depends on this project
+2. View logs on '....'
+3. Run this test I created
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Your environment**
+* Version of the repo - a specific commit or tag
+* Version of ngx-rust
+* Version of Rust
+* Version of NGINX (and all dependencies if modified)
+* OS and distribution
+* Details about containerization, virtualization, or physical environment
+
+**Additional context**
+Add any other context about the problem here. Any log files you want to share.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,17 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,15 @@
+### Proposed changes
+Describe the use case and detail of the change. If this PR addresses an issue 
+on GitHub, make sure to include a link to that issue here in this description 
+(not in the title of the PR).
+
+### Checklist
+Before creating a PR, run through this checklist and mark each as complete.
+
+- [ ] I have written my commit messages in the [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) format. 
+- [ ] I have read the [CONTRIBUTING](/CONTRIBUTING.md) doc
+- [ ] I have added tests (when possible) that prove my fix is effective or that my feature works
+- [ ] I have checked that all unit tests pass after adding my changes
+- [ ] I have updated necessary documentation
+- [ ] I have rebased my branch onto master
+- [ ] I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

.github/dependabot.yml

@@ -0,0 +1,11 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "cargo"
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"

.github/workflows/cargo-audit.yaml

@@ -0,0 +1,14 @@
+name: Security audit
+on:
+  push:
+    paths:
+      - '**/Cargo.toml'
+      - '**/Cargo.lock'
+jobs:
+  security_audit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/audit-check@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/ci.yaml

@@ -0,0 +1,128 @@
+name: Rust
+
+on: [ push, pull_request ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test-linux:
+    name: Test (Linux)
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout source
+        uses: actions/checkout@v3
+      - name: set up cargo cache
+        uses: actions/cache@v3
+        continue-on-error: false
+        with:
+          path: |
+            .cache/cargo/registry/index/
+            .cache/cargo/registry/cache/
+            .cache/cargo/git/db/
+          key: ${{ runner.os }}-cargo
+          restore-keys: ${{ runner.os }}-cargo
+      - name: set up nginx source binary cache
+        uses: actions/cache@v3
+        continue-on-error: false
+        with:
+          path: |
+            .cache/.gnupg
+            .cache/*.tar.gz
+            .cache/*.tar.asc
+            .cache/*.tar.sig
+          key: nginx-${{ hashFiles('**/nginx-sys/build.rs') }}
+          restore-keys: nginx-
+      - name: run tests in container
+        run: make container-test
+
+  test-macos:
+    name: Test (MacOS)
+    runs-on: macos-latest
+    steps:
+      - name: install GNU make 4
+        run: brew install make openssl
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - name: set up cargo cache
+        uses: actions/cache@v3
+        continue-on-error: false
+        with:
+          path: |
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+          key: ${{ runner.os }}-cargo
+          restore-keys: ${{ runner.os }}-cargo
+      - name: set up nginx source binary cache
+        uses: actions/cache@v3
+        continue-on-error: false
+        with:
+          path: |
+            .cache/.gnupg
+            .cache/*.tar.gz
+            .cache/*.tar.asc
+            .cache/*.tar.sig
+          key: nginx-${{ hashFiles('**/nginx-sys/build.rs') }}
+          restore-keys: nginx-
+      - name: run tests
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --verbose
+
+  fmt:
+    name: Rustfmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - run: rustup component add rustfmt
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
+#  clippy:
+#    name: Clippy
+#    runs-on: ubuntu-latest
+#    steps:
+#      - uses: actions/checkout@v3
+#      - uses: actions-rs/toolchain@v1
+#        with:
+#          profile: minimal
+#          toolchain: stable
+#          override: true
+#      - run: rustup component add clippy
+#      - uses: actions-rs/cargo@v1
+#        with:
+#          command: clippy
+#          args: -- -D warnings
+
+#  docs:
+#    name: Docs
+#    runs-on: ubuntu-latest
+#    steps:
+#      - name: Checkout repository
+#        uses: actions/checkout@v3
+#      - name: Install Rust
+#        uses: actions-rs/toolchain@v1
+#        with:
+#          toolchain: stable
+#          profile: minimal
+#          override: true
+#      - name: Check documentation
+#        env:
+#          RUSTDOCFLAGS: -D warnings
+#        uses: actions-rs/cargo@v1
+#        with:
+#          command: doc
+#          args: --no-deps --document-private-items

.github/workflows/fossa.yaml

@@ -0,0 +1,18 @@
+name: License Scanning
+
+on:
+  - pull_request
+  - push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Run FOSSA scan and upload build data
+        uses: fossa-contrib/fossa-action@v1
+        with:
+          fossa-api-key: ${{ secrets.FOSSA_API_KEY }}