[bootlin/training-materials updates] master: yocto: slides: improve slide "Configuring teh mirrors" (6e386ee0)

[Luca Ceresoli]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/6e386ee0207c5de86553ced3ff0e01af1fb24a91

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commit 6e386ee0207c5de86553ced3ff0e01af1fb24a91
Author: Luca Ceresoli <luca.ceresoli at bootlin.com>
Date:   Mon Jul 18 16:59:54 2022 +0200

    yocto: slides: improve slide "Configuring teh mirrors"
    
    Move own-mirrors above as it is the simple option. For the
    PREMIRRORS:append modify the example to really show why it can be useful
    (different URLs, not possible with own-mirrors). Improve all wording.
    
    Signed-off-by: Luca Ceresoli <luca.ceresoli at bootlin.com>


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6e386ee0207c5de86553ced3ff0e01af1fb24a91
 .../yocto-recipe-advanced/yocto-recipe-advanced.tex | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/slides/yocto-recipe-advanced/yocto-recipe-advanced.tex b/slides/yocto-recipe-advanced/yocto-recipe-advanced.tex
index eab291ab..36903948 100644
--- a/slides/yocto-recipe-advanced/yocto-recipe-advanced.tex
+++ b/slides/yocto-recipe-advanced/yocto-recipe-advanced.tex
@@ -417,25 +417,26 @@ ftp://.*/.*     http://sources.openembedded.org/ \
 \begin{frame}[fragile]
   \frametitle{Configuring the mirrors}
   \begin{itemize}
-    \item It's possible to prepend custom mirrors, using the
-      \code{PREMIRRORS} variable:
+    \item It is possible to use a custom mirror using the \code{own-mirrors}
+      class (only one URL supported):
   \end{itemize}
   \begin{block}{}
     \begin{minted}{sh}
-PREMIRRORS:prepend = "\
- git://.*/.* http://www.yoctoproject.org/sources/   \n \
- ftp://.*/.* http://www.yoctoproject.org/sources/   \n \
- http://.*/.* http://www.yoctoproject.org/sources/  \n \
- https://.*/.* http://www.yoctoproject.org/sources/ \n"
+INHERIT += "own-mirrors"
+SOURCE_MIRROR_URL = "http://example.com/my-mirror"
     \end{minted}
   \end{block}
   \begin{itemize}
-    \item Another solution is to use the \code{own-mirrors} class:
+    \item For a more complex setup,  prepend custom mirrors to the
+      \code{PREMIRRORS} variable:
   \end{itemize}
   \begin{block}{}
     \begin{minted}{sh}
-INHERIT += "own-mirrors"
-SOURCE_MIRROR_URL = "http://example.com/my-source-mirror"
+PREMIRRORS:prepend = "\
+ git://.*/.*   http://example.com/my-mirror-for-git/ \
+ svn://.*/.*   http://example.com/my-mirror-for-svn/ \
+ http://.*/.*  http://www.yoctoproject.org/sources/  \
+ https://.*/.* http://www.yoctoproject.org/sources/  "
     \end{minted}
   \end{block}
 \end{frame}