Final slides for 20260512

Author: nicholasdille

slides/2026-05-12/000_introduction/02_bio.md

@@ -0,0 +1,27 @@
+<!-- .slide: id="bio" -->
+
+## Nicholas Dille
+
+<img src="images/NicholasDille.jpg" style="width: 25%; float: right; border-radius: 8px;" />
+
+**Husband, father, geek, trumpeteer**
+
+`#k8s` `#o11y` `#cicd` `#go`
+
+- <span class="fa-li"><i class="fa-duotone fa-globe"></i></span> [Blogger][1] since 2003
+- <span class="fa-li"><i class="fa-duotone fa-microphone"></i></span> [Speaker][2] since 2009
+- <span class="fa-li"><i class="fa-duotone fa-briefcase"></i></span> [Haufe Group][3] since 2016
+- <span class="fa-li"><i class="fa-duotone fa-person-chalkboard"></i></span> Self-employed [trainer][1] since 2020
+- <span class="fa-li"><i class="fa-duotone fa-user-helmet-safety"></i></span> Maintainer of [uniget][4] since 2021
+
+*Reach out via* [<i class="fa-brands fa-linkedin"></i>][5] [<i class="fa-brands fa-mastodon"></i>][6]  [<i class="fa-brands fa-bluesky"></i>][7] [<i class="fa-brands fa-github"></i>][8] [<i class="fa-brands fa-gitlab"></i>][9]
+
+[1]: https://dille.name
+[2]: https://dille.name/blog/tags/#Slides
+[3]: https://haufegroup.com
+[4]: https://uniget.dev
+[5]: https://www.linkedin.com/in/nicholasdille/
+[6]: https://freiburg.social/@nicholasdille
+[7]: https://bsky.app/profile/nicholasdille.bsky.social
+[8]: https://github.com/nicholasdille
+[9]: https://gitlab.com/nicholasdille

slides/2026-05-12/080_ci_cd/scripting/alternatives.md

@@ -0,0 +1,97 @@
+<i class="fa fa-solid fa-shuffle fa-8x"></i> <!-- .element: style="float: right;" -->
+
+## Alternatives
+
+---
+
+<i class="fa fa-solid fa-shuffle fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Alternatives
+
+### High-level programming language
+
+For example: Go, Rust, Java, C#
+
+### When to switch
+
+- Parsing of structured files
+- Length
+- Readability
+- Portability
+- Performance
+
+Think about a custom CLI <i class="fa fa-solid fa-wand-magic-sparkles"></i>
+
+---
+
+<i class="fa fa-solid fa-shuffle fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Alternatives
+
+### Script languages
+
+For example: Python, Ruby, Perl, PowerShell
+
+The runtime becomes a hard dependency
+
+### When to switch
+
+- Parsing of structured files
+- Length
+- Readability
+- Portability
+- Performance
+
+---
+
+<i class="fa fa-solid fa-shuffle fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Alternatives
+
+### Wrap in `Dockerfile`
+
+Manages the runtime environment
+
+Creates shippable unit
+
+Intermediate step before switching to another language
+
+### When to switch
+
+- Portability
+
+---
+
+<i class="fa fa-solid fa-shuffle fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Alternatives
+
+### Abstraction
+
+Consume logic from existing tools
+
+### For example
+
+Terraform / OpenTofu
+
+Docker Compose
+
+Ansible
+
+---
+
+<i class="fa fa-solid fa-shuffle fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Alternatives
+
+### Simplify
+
+Complexity caused by design decisions
+
+### For example
+
+`xmlstarlet` is great for processing XML/XHTML
+
+Excessive use sacrifices readability and performance
+
+Templating can be an alternative, e.g. `gomplate`

slides/2026-05-12/080_ci_cd/scripting/errors.md

@@ -0,0 +1,141 @@
+<i class="fa fa-solid fa-poo-storm fa-8x"></i> <!-- .element: style="float: right;" -->
+
+## Error Handling
+
+---
+
+<i class="fa fa-solid fa-poo-storm fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Error Handling
+
+### `errexit` is not enough
+
+Break when a command fails:
+
+```bash
+# Enable errexit (short version)
+set -e
+
+# Enable errexit (long version)
+set -o errexit
+```
+
+Often you want to handle the error gracefully
+
+Use `errexit` in addition to error handling
+
+---
+
+<i class="fa fa-solid fa-poo-storm fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Error Handling
+
+### Errors must be handled
+
+Do not suppress errors:
+
+```bash
+test -f missing_file_name || true
+```
+
+This rarely makes sense!
+
+---
+
+<i class="fa fa-solid fa-poo-storm fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Error Handling
+
+### Use `if` for error handling
+
+Maps to `true` except when return code > 0:
+
+```bash
+# Check if file exists
+if test -f missing_file_name; then
+    echo "File exists"
+else
+    echo "File is missing"
+fi
+```
+
+...works for any tool:
+
+```bash
+# Check for pattern in file
+if grep --quiet pattern file; then
+    echo "Pattern exists in file"
+else
+    echo "Pattern does not exist in file"
+fi
+```
+
+---
+
+<i class="fa fa-solid fa-poo-storm fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Error Handling
+
+### Know your tools
+
+`curl` signals success if it completed:
+
+```bash
+if curl http://example.com; then
+    echo "Succeeded for any HTTP response"
+fi
+```
+
+Tell `curl` to `--fail` on HTTP errors (>= 400):
+
+```bash
+if curl --fail http://example.com; then
+    echo "Succeeded only for HTTP 2xx"
+fi
+```
+
+---
+
+<i class="fa fa-solid fa-poo-storm fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Error Handling
+
+### Handle missing variables
+
+Break on unset variables:
+
+```bash
+set -o nounset
+
+# This fails
+echo $foo
+```
+
+Exposes typos in variable names
+
+---
+
+<i class="fa fa-solid fa-poo-storm fa-4x"></i> <!-- .element: style="float: right;" -->
+
+## Error Handling
+
+### Pipes mask errors
+
+`errexit` only catches the exit code of the last command:
+
+```bash
+set -o errexit
+
+false | cat
+echo "This is executed"
+```
+
+Enable `pipefail` to catch errors in pipelines:
+
+```bash
+set -o errexit
+set -o pipefail
+
+false | cat
+echo "This is NOT executed"
+```