Update 2021-11-17

notes/20210805075718-the_modern_emacs.org

@@ -1,7 +1,9 @@
 :PROPERTIES:
 :ID:       95f5c8a7-007a-4b0c-b3c7-c971d0346b98
+:ROAM_REFS: https://youtu.be/ZbxUJz6a9Io
 :END:
 #+title: The Modern Emacs
+#+filetags: :Stream:
 
 * Introduction
 - How to handle it?

notes/20210823124653-per_project_dev_environment.org

@@ -1,5 +1,6 @@
 :PROPERTIES:
 :ID:       65d096bd-7438-4b25-af01-e7da37aafade
+:ROAM_REFS: https://youtu.be/pS9JBKdAy4Q
 :END:
 #+title: Per-Project Dev Environment
 #+filetags: Stream

notes/20210903103806-not_very_advanced_git.org

@@ -1,7 +1,9 @@
 :PROPERTIES:
 :ID:       d0311574-3528-49fb-95a5-2233b2b371a9
+:ROAM_REFS: https://youtu.be/tPp1dQ8y9jM
 :END:
 #+title: Not Very Advanced Git
+#+filetags: :Stream:
 
 * Introduction
 Expectations: Intermediate level of Git knowledge.

notes/20210920113750-deploy_gnu_guix_to_vps.org

@@ -1,5 +1,6 @@
 :PROPERTIES:
 :ID:       d7739104-da63-4206-b0ff-f4fa04039f0d
+:ROAM_REFS: https://youtu.be/55KUH4g1OOc
 :END:
 #+title: Deploy GNU Guix to VPS
 #+filetags: :Stream:

notes/20210923100149-guix_escape_hatches.org

@@ -1,5 +1,6 @@
 :PROPERTIES:
 :ID:       f6b05f22-746c-4d78-bba2-61a8706c6609
+:ROAM_REFS: https://youtu.be/0-2RyRKEPcY
 :END:
 #+title: Guix Escape Hatches
 #+filetags: :Stream:

notes/20211111141408-guix_shell_overview.org

@@ -1,21 +1,71 @@
 :PROPERTIES:
 :ID:       070a6b4b-39ef-4233-8a83-753ca2a4a8bd
+:ROAM_REFS: https://youtu.be/UMCHuHSlVWk
 :END:
 #+title: guix shell: Overview
 #+filetags: :Stream:
 
 * Introduction
 SCHEDULED: <2021-11-16 Tue>
+- Overview of ~guix shell~.
+- Comparison with ~guix environment~ and ~virtualenv~.
+- Practical example and integration with [[https://direnv.net/][direnv]].
+- [[id:65d096bd-7438-4b25-af01-e7da37aafade][Per-Project Dev Environment]].
 * What ~guix shell~ is?
-- universal virtualenv
-- successor of ~guix environment~
+- The tool for trying out software.
+- The tool for spinning up development environments.
+- Universal virtualenv.
+- The tool for making isolated environments.
+- Successor of ~guix environment~.
 * Differences with ~guix environment~
 ** ad-hoc by default
 ** Support for guix.scm and manifest.scm
 - ~guix shell~ automatically loads them if no arguments provided.
+- Difference between guix.scm and manifest.scm.
+- Show ~~/tmp/htop~ example
+** Composable switches
 ** Caching
 #+begin_src shell
 guix shell -- make
 #+end_src
+* Examples
+** Trying out a Package
+#+begin_src shell
+guix shell htop -- htop
+#+end_src
+** Executing in Isolated Environment
+#+begin_src shell
+guix shell htop --preserve=$ --container
+#+end_src
+** Preventing Garbage Collection
+#+begin_src shell
+guix shell htop -r ./persistent-profile
+guix gc --list-roots
+#+end_src
+** Reproducible Development Environment
+#+begin_src shell
+guix describe -f channels > ./channels.scm
+guix time-machine -C ./channels.scm -- shell
+#+end_src
+* How to Integrate it with direnv?
+#+begin_src shell :results verbatim
+guix shell python python-numpy --search-paths
+#+end_src
+
+#+RESULTS:
+: export PATH="/gnu/store/lk53yz7cgj6kgw1m82mfs0843j3bgpn5-profile/bin${PATH:+:}$PATH"
+: export PYTHONPATH="/gnu/store/lk53yz7cgj6kgw1m82mfs0843j3bgpn5-profile/lib/python3.8/site-packages${PYTHONPATH:+:}$PYTHONPATH"
+
+[[file:~/work/rde/rde/features/shellutils.scm::(simple-service][features/shellutils.scm]]
+* Questions
+- Other tools for making dev environments.
+- What to do with dev-time dependencies?
+* Conclusion
+- Universal, fast, feature rich, well-integrating and user-friendly tool.
+- We can make it ultimate by providing additional APIs for generating
+  packages.
 * Links
 - https://guix.gnu.org/en/blog/2021/from-guix-environment-to-guix-shell/
+- https://guix.gnu.org/manual/devel/en/html_node/Invoking-guix-package.html#index-manifest
+- https://guix.gnu.org/manual/devel/en/html_node/Invoking-guix-shell.html#Invoking-guix-shell
+- https://github.com/direnv/direnv/blob/master/stdlib.sh