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<h1>Development guide</h1>
<h2>Tips</h2>
<p>If happens often that we commit changes and then we realize that we forgot to regenerate APKBUILD checksums. This is noticed by Travis (<a href="https://travis-ci.org/postmarketOS/pmbootstrap/builds/261056579">example</a>) but you might want to avoid it. </p>
<p>You can install the following git hook that is run every time before you commit. </p>
<p>Copy the following code to <code>.git/hooks/pre-commit</code> inside your <code>pmbootstrap</code> repository:</p>
<pre class="codehilite"><code class="language-bash">#!/bin/bash
#
# PostmarketOS pre-commit hook
# Checks for bad checksums

./test/check_checksums.py</code></pre>


<p>Now this is what happens when you forgot to regenerate checksums for some aport and try to commit</p>
<pre class="codehilite"><code class="language-bash">$ git commit -a
Checking device-qemu-aarch64 for correct checksums
[13:45:23] (native) generate checksums for device-qemu-aarch64
[13:45:23] Done
MM aports/device/device-qemu-aarch64/APKBUILD

diff --git a/aports/device/device-qemu-aarch64/APKBUILD b/aports/device/device-qemu-aarch64/APKBUILD
index 99b811b..c4cee6c 100644
--- a/aports/device/device-qemu-aarch64/APKBUILD
+++ b/aports/device/device-qemu-aarch64/APKBUILD
@@ -21,4 +21,4 @@ package() {
                &quot;$pkgdir&quot;/etc/deviceinfo
 }

-sha512sums=&quot;a18ab789c19d8802be6a9e9c842f4c304f267bd78f46b096b4ba6609430d1544e0a9eca9bc22db67a0728efae3aad6c2def9f7e64157d31aeb31b4bb839076d5  deviceinfo&quot;
+sha512sums=&quot;8df46383685a40a96b7c604c29d413ecdd4b4a9b92cb61f452283042f189b1ca01cb70632fec0711dd67229e0501729762c6841359ac7ea455f516b512abce9c  deviceinfo&quot;

** The checksums are not correct</code></pre>


<p>After that, simply do <code>git commit -a --amend -n</code> (<code>-n</code> is necessary so that this time the hook is not triggered).</p>

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