Add packaging

Author: giordano

presentations/intro-julia/Project.toml

@@ -1,6 +1,10 @@
 [deps]
 BenchmarkTools = "6e4b80f9-dd63-53aa-95a3-0cdb28fa8baf"
 ChunkSplitters = "ae650224-84b6-46f8-82ea-d812ca08434e"
+LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
+Profile = "9abbd945-dff8-562f-b5e8-e1ebf5ef1b79"
+Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 quarto_jll = "b7163347-bfae-5fd9-aba4-19f139889d78"
 
 [compat]

presentations/intro-julia/index.qmd

@@ -16,6 +16,8 @@ format:
       useTextContentForMissingTitles: false
     preview-links: true
     slide-number: true
+    toc: true
+    toc-depth: 1
     theme: [solarized, custom.scss]
     transition: fade
 date: 2025-11-16
@@ -132,7 +134,7 @@ play(Rock(), Paper())
 
 # Arrays and <br> Linear Algebra
 
-## Arrays
+## Arrays{.scrollable}
 
 Julia has built-in support for multi-dimensional tensors:
 
@@ -478,6 +480,53 @@ v = randn(20_000_000);
 
 # Good practices
 
+## Packaging
+
+Julia has a built-in package manager:
+
+```julia
+julia> # Press ] to enter the Pkg REPL mode
+
+(@v1.12) pkg> activate MyLocalEnvironment
+  Activating new project at `/private/tmp/MyLocalEnvironment`
+
+(MyLocalEnvironment) pkg> add Example
+    Updating registry at `/var/folders/v2/hmy3kzgj4tb3xsy8qkltxd0r0000gn/T/tmp.tmYxNNrwBP/registries/General.toml`
+   Resolving package versions...
+   Installed Example ─ v0.5.5
+    Updating `/private/tmp/MyLocalEnvironment/Project.toml`
+  [7876af07] + Example v0.5.5
+    Updating `/private/tmp/MyLocalEnvironment/Manifest.toml`
+  [7876af07] + Example v0.5.5
+Precompiling packages finished.
+  1 dependency successfully precompiled in 1 seconds
+
+(MyLocalEnvironment) pkg> status
+Status `/private/tmp/MyLocalEnvironment/Project.toml`
+  [7876af07] Example v0.5.5
+```
+
+## Virtual environments
+
+Virtual environments are defined by two files:
+
+* `Project.toml`: only top-level dependencies, with compatibility specifications (automatically generated by Pkg, but can be edited by users)
+* `Manifest.toml`: full snapshot of all packages in the environment, for reproducibility (fully machine-generated, do not touch it)
+
+## Virtual environments (cont.)
+
+`Project.toml`:
+````{.toml}
+{{< include Project.toml >}}
+````
+
+## Virtual environments (cont.)
+
+`Manifest.toml`:
+````{.toml}
+{{< include Manifest.toml >}}
+````
+
 ## Testing
 
 ```{julia}
@@ -494,8 +543,6 @@ using Test, Random
 end;
 ```
 
-## Packaging
-
 # Conclusions
 
 ## Further resources