1974dd1df7
Follow-up to https://github.com/dagger/dagger/pull/1693 Signed-off-by: Gerhard Lazu <gerhard@lazu.co.uk>
213 lines
8.6 KiB
Markdown
213 lines
8.6 KiB
Markdown
---
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slug: /1200/local-dev
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displayed_sidebar: europa
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---
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# CI/CD in your local dev
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Everyone should be able to run their CI/CD pipeline locally.
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Having to commit & push in order to test a change is a slow way to iterate on a pipeline.
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This guide shows you the Dagger way.
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Within 5 minutes, you will have a local CI/CD loop and run your first test & build pipeline.
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import Tabs from '@theme/Tabs'; import TabItem from '@theme/TabItem';
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<Tabs defaultValue="macos"
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groupId="os"
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values={[
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{label: 'macOS', value: 'macos'}, {label: 'Linux', value: 'linux'}, {label: 'Windows', value: 'windows'},
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]}>
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<TabItem value="macos">
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We assume that you have [Homebrew](https://brew.sh/) installed.
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If you do, you can install `dagger` with a single command:
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```shell
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brew install dagger/tap/dagger
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```
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Check that `dagger` installed correctly by verifying its execution path:
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```shell
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type dagger
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dagger is /opt/homebrew/bin/dagger
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```
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Before we can build & test our example app with `dagger`, we need to have Docker running.
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You most likely already have Docker set up.
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If not, [Docker Desktop](https://www.docker.com/products/docker-desktop) makes this easy.
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With Docker running, we are ready to download our example app and run its CI/CD pipeline:
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```shell
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git clone https://github.com/dagger/dagger
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cd dagger
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git checkout v0.2.0-beta.1
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cd pkg/universe.dagger.io/examples/todoapp
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```
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With everything in place, we run the CI/CD pipeline locally:
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```shell
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dagger do build
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```
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With an empty cache, installing all dependencies, then testing & generating a build for this example app completes in just under 3 minutes:
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```shell
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[✔] client.filesystem.".".read 0.1s
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[✔] actions.deps 118.8s
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[✔] actions.test.script 0.1s
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[✔] actions.test 6.3s
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[✔] actions.build.run.script 0.0s
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[✔] actions.build.run 43.7s
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[✔] actions.build.contents 0.4s
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[✔] client.filesystem.build.write 0.1s
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```
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Since this is a static application, we can open the files which are generated in `actions.build.contents` in a browser.
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The last step copies the build result into the `build` directory on the host.
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On macOS, we run `open build/index.html` in our terminal and see the following app preview:
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One of the big advantages to this approach is that we did not have to install any dependencies specific to this application.
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Dagger managed all the intermediary steps, and we ended up with the end-result on our host, without any of the transient dependencies.
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Now that we have everything running locally, let us make a change and get a feel for our local CI/CD loop.
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The quicker we can close this loop, the quicker we can learn what actually works.
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With Dagger, we can close this loop locally, without committing and pushing our changes.
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And since every action is cached, subsequent runs will be quicker.
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In the todoapp directory, edit line `25` of `src/components/Form.js` and save the file.
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I change this line to `What must be done today?` and run the build locally again:
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```shell
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dagger do build
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[✔] client.filesystem.".".read 0.0s
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[✔] actions.deps 40.8s
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[✔] actions.test.script 0.0s
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[✔] actions.test 6.3s
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[✔] actions.build.run.script 0.0s
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[✔] actions.build.run 43.6s
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[✔] actions.build.contents 0.4s
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[✔] client.filesystem.build.write 0.1s
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```
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The total `84.4` time is macOS specific, since the Linux alternative is more than 5x quicker.
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Either way, this local test & build loop is likely to change our approach to iterating on changes.
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It becomes even more obvious when the change is not as straightforward as knowing _exactly_ which line to edit.
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</TabItem>
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<TabItem value="linux">
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[Download the latest 64bit Linux binary release](https://github.com/dagger/dagger/releases/latest).
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We support both x86 & ARM architectures.
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We install `dagger` in `/usr/local/bin`, but anywhere in your `PATH` works:
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```shell
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type dagger
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dagger is /usr/local/bin/dagger
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```
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Before we can build, test & deploy our example app with `dagger`, we need to have Docker Engine running.
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You most likely already have Docker Engine set up.
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If not, [Docker on Linux install](https://docs.docker.com/engine/install/#server) makes this easy.
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With Docker Engine running, we are ready to download our example app and run its CI/CD pipeline:
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```shell
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git clone https://github.com/dagger/dagger
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cd dagger
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git checkout v0.2.0-beta.1
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cd pkg/universe.dagger.io/examples/todoapp
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```
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With everything in place, we run the CI/CD pipeline locally:
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```shell
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dagger do build
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```
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With an empty cache, installing all dependencies, then testing & generating a build for this example app completes in just under 1 minute:
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```shell
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[✔] client.filesystem.".".read 0.3s
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[✔] actions.deps 39.7s
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[✔] actions.test.script 0.2s
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[✔] actions.test 1.9s
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[✔] actions.build.run.script 0.1s
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[✔] actions.build.run 10.0s
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[✔] actions.build.contents 0.6s
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[✔] client.filesystem.build.write 0.1s
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```
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Since this is a static application, we can open the files which are generated in `actions.build.contents` in a browser.
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The last step copies the build result into the `build` directory on the host.
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On Linux, we run `xdg-open build/index.html` in our terminal and see the following app preview:
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One of the big advantages to this approach is that we did not have to install any dependencies specific to this application.
|
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Dagger managed all the intermediary steps, and we ended up with the end-result on our host, without any of the transient dependencies.
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|
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Now that we have everything running locally, let us make a change and get a feel for our local CI/CD loop.
|
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The quicker we can close this loop, the quicker we can learn what actually works.
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With Dagger, we can close this loop locally, without committing and pushing our changes.
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And since every action is cached, subsequent runs will be quicker.
|
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|
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In the todoapp directory, edit line `25` of `src/components/Form.js` and save the file.
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I change this line to `What must be done today?` and run the build locally again:
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```shell
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dagger do build
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[✔] client.filesystem.".".read 0.1s
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[✔] actions.deps 13.3s
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[✔] actions.test.script 0.0s
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[✔] actions.test 1.8s
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[✔] actions.build.run.script 0.0s
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[✔] actions.build.run 10.1s
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[✔] actions.build.contents 0.6s
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[✔] client.filesystem.build.write 0.1s
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```
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Being able to re-run the test & build loop locally in `26.7s`, without adding any extra dependencies to our host, is likely to change our approach to iterating on changes.
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It becomes even more obvious when the change is not as straightforward as knowing _exactly_ which line to edit.
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</TabItem>
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<TabItem value="windows">
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We assume that you have [curl](https://curl.se/windows/) installed.
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If you do, you can install `dagger` with a single command. From a powershell terminal, run the following command:
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```shell
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curl https://releases.dagger.io/dagger/install.ps1 -OutFile install.ps1 ; ./install.ps1; rm install.ps1
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```
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We try to move the dagger binary under `C:\Windows\System32` but
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in case we miss the necessary permissions, we'll save everything under `<your home folder>/dagger`
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Check that `dagger` is installed correctly by opening a command prompt and run:
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```shell
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where dagger
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C:\<your home folder>\dagger.exe
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```
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</TabItem>
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</Tabs>
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:::tip
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Now that we are comfortable with our local CI/CD loop, let us configure a remote CI environment in the second part.
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The difference is that we will also deploy the build output to Netlify.
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Dagger makes this easy.
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:::
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