Initial commit

.github/workflows/workflow.yml

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+name: Build and test the esy package
+
+on:
+  - push
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - macos-13jk
+          - macos-latest
+          - ubuntu-latest
+          - windows-latest
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Use Node.js
+        uses: actions/setup-node@v3
+
+      - name: Install esy, verdaccio and esy-package
+        run: npm install -g esy esy-package
+
+      - name: Run end-to-end tests on the package 
+        run: DEBUG=bale*,verdaccio* esy-package
+        shell: bash
+        env:
+          SHELL: "bash.exe" # HACK!! For some weird reason, $SHELL in Github actions' Windows' bash shell doesn't set this environment variable. We rely on it to figure if path normalisation is necessary on Gitbash Windows
+
+      - uses: actions/upload-artifact@v3
+        with:
+          name: release
+          path: package.tar.gz

.gitignore

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+*~
+node_modules
+_esy
+_esy-package
+.log
+package.tar.gz
+package.tgz
+verdaccio-storage

.npmrc

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+//localhost:4873/:_authToken="+vVrDzq8gudTDDEoQOS+PQ=="

Readme.md

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+![Build and test the esy
+package](https://github.com/ManasJayanth/esy-packages-template/workflows/Build%20and%20test%20the%20esy%20package/badge.svg)
+
+# esy-zlib
+
+`esy-zlib` is sample package, [`zlib`](https://www.zlib.net/), packaged for [`esy`](https://esy.sh/).
+
+## Why
+`esy` can not only fetch and install Reason and OCaml libraries and tools,
+but also those written in C. This extends reproducibility benefits to
+packages written in C, like `skia`, `libffi`, `pkg-config`
+etc. Users don't have to install them separately, nor have to worry if
+they have installed the correct version. Read more at the docs about
+[benefits for opting for esy packages](https://esy.sh#TODO).
+
+## How to use `esy-zlib`?
+
+`esy-zlib` can be used from both NPM and directly from Github.
+
+### From NPM 
+
+`esy-zlib` is deployed on NPM can be found
+[here](https://www.npmjs.com/package/TODO).
+
+You can simply run `esy add esy-zlib` to install it, or specify it in
+`package.json` and run `esy`.
+
+```diff
+{
+  "dependencies": {
++   "esy-zlib": "*"
+  }
+}
+```
+
+### Directly from Github
+
+```json
+{
+  "dependencies": {
+    "esy-zlib": "esy-packages/esy-zlib"
+  }
+}
+```
+
+i.e. `<GITHUB_ORG or USERNAME>/<REPO NAME>`
+
+To use a specific commit,
+
+```diff
+  "dependencies": {
++   "esy-zlib": "esy-packages/esy-zlib#<commit hash>"
+  }
+```
+
+## How to package for esy?
+
+### For the experienced
+
+**The gist**
+Specify the configure and build commands in `esy.build` property of
+`esy.json` and the install step in `esy.install`. If the package
+builds "in source", set `esy.buildsInSource` property to `true`. Use
+`$cur__install` environment variable to set the install location.
+
+See [docs](TODO) for reference.
+
+The CI will take care of fetching the sources and creating an NPM
+package for you. See [script.js](TODO) to see how it works.
+
+You can download it or auto publish via CI.
+
+### For beginners
+
+> Note: you'll need Node.js for this tutorial. If you're experienced
+> with bash, you can use it instead.
+
+Fundamentally, packaging for esy works like in other Linux distros,
+except ofcourse, such that packages become available on MacOS and
+Windows too.
+
+You would typically have to specify the instructions to build the
+package in the `esy.json`. For example, everyone's favourite http
+tool, [curl](https://curl.se/), needs the following instructions ([as
+described on their website](https://curl.se/docs/install.html))
+
+```sh
+./configure
+make
+make install
+```
+
+Many packages have similar instructions!
+
+Configure and build steps are specified in the `esy.build` property in
+the `esy.json` and install steps in `esy.install`. Example,
+
+```json
+{
+  "esy": {
+    "build": [
+	  "./configure",
+	  "make"
+	],
+	"install": [
+	  "make install"
+	]
+  }
+}
+```
+
+
+## Testing and making sure the package works as expected 
+
+To test if the package works, we recommend an end-to-end test by
+publishing it to local
+[`verdaccio`](https://github.com/verdaccio/verdaccio), and using the
+package with a `package.json` or `esy.json` depends on it.
+
+```json
+{
+  "dependencies": {
+    esy-zlib": "*"
+  }
+}
+```
+
+And pointing `esy` to the local npm registry
+
+```sh
+esy i --npm-registry http://localhost:4873
+esy b
+```
+
+If the package is a library, it's a good idea to write a small program
+to actually check if the library works. Referring how the
+corresponding package is being tested in Homebrew or Arch Linux.
+
+Checkout [ci-test.sh](./ci-test.sh) for reference, used on the CI.

esy-test/.gitignore

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+esy.lock
+_esy
+node_modules

esy-test/Readme.md

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+See [Readme in the root][../Readme.md#testing-and-making-sure-package-works-as-expected]

esy-test/package.json

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+{
+  "esy": {
+    "build": "ls -R #{esy-zlib.lib}"
+  },
+  "dependencies": {
+    "esy-zlib": "*"
+  }
+}

esy.json

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+{
+  "name": "esy-zlib",
+  "version": "1.3.1000",
+  "description": "zlib packaged for esy",
+  "source": "https://zlib.net/zlib-1.3.1.tar.gz#sha256:9a93b2b7dfdac77ceba5a558a580e74667dd6fede4585b91eefb60f03b72df23",
+  "override": {
+    "exportedEnv": {
+      "CFLAGS": {
+        "scope": "global",
+        "val": "-I#{self.install / 'include'} $CFLAGS"
+      },
+      "LDFLAGS": {
+        "scope": "global",
+        "val": "-L#{self.lib} -lz $LDFLAGS"
+      },
+      "PKG_CONFIG_PATH": {
+        "scope": "global",
+        "val": "#{self.lib / 'pkgconfig' : $PKG_CONFIG_PATH }"
+      },
+      "Z_LIB_PATH": {
+        "val": "#{self.lib}",
+        "scope": "global"
+      }
+    },
+    "buildEnv": {
+      "CHOST": "#{os == 'windows' ? 'x86_64-w64-mingw32': '' }",
+      "CFLAGS": "-fPIC -O2"
+    },
+    "build": [
+      [
+        "bash",
+        "-c",
+        "./configure --prefix=$cur__install #{os == 'windows' ? '--uname=cygwin' : ''}"
+      ],
+      "make",
+      "make test"
+    ],
+    "install": "make install",
+    "buildsInSource": true,
+    "dependencies": {}
+  }
+}