v2: WIP support for slides

13 files changed, 1564 insertions, 8 deletions

diff --git a/v2/.gitignore b/v2/.gitignore
index ac25e0d..e824ac3 100644
--- a/v2/.gitignore
+++ b/v2/.gitignore
@@ -27,4 +27,5 @@
 /src/content/**/*.indexentry
 /src/content/**/*.xmlentry
 /src/content/**/*.xml
+/src/content/*/slide/*.pdf
 /src/content/.gitignore
diff --git a/v2/dynamic.mk b/v2/dynamic.mk
index c0a3132..77c7e77 100644
--- a/v2/dynamic.mk
+++ b/v2/dynamic.mk
@@ -8,6 +8,7 @@ include generated.mk
 
 .SUFFIXES:
 .SUFFIXES: .page .md .content .conf .html .categoryentry .indexentry .xmlentry .mapentry .uncolored
+.SUFFIXES: .slides .ps .pdf
 
 
 .page.md:
@@ -43,6 +44,11 @@ include generated.mk
 		"`tail -n +3 $<`" \
 		> $@
 
+.slides.ps:
+	exit 88
+
+.ps.pdf:
+	ps2pdf $< $@
 
 
 all: public
@@ -96,6 +102,7 @@ content = \
 	$(all-generated.html)                \
 	$(all-generated.index)               \
 	$(all-generated.xml)                 \
+	$(all-generated.pdf)                 \
 	$(static-content)                    \
 	$(svgs)                              \
 	src/content/sitemap.xml              \
diff --git a/v2/po/euandre.org.pot b/v2/po/euandre.org.pot
index 78a1d89..0b0f044 100644
--- a/v2/po/euandre.org.pot
+++ b/v2/po/euandre.org.pot
@@ -7,7 +7,7 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
-"POT-Creation-Date: 2023-04-10 16:03-0300\n"
+"POT-Creation-Date: 2023-04-10 21:07-0300\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -168,11 +168,36 @@ msgid "export index_til_url=\"$(url-for \"$lang/$(coll2path \"$lang\" til)\")\""
 msgstr ""
 
 #. type: Plain text
-#: src/lib/base.en.conf:50
+#: src/lib/base.en.conf:51
 msgid "export feed_til_title=\"EuAndreh's TIL\""
 msgstr ""
 
 #. type: Plain text
+#: src/lib/base.en.conf:54
+msgid "export index_slide_title='Slides'"
+msgstr ""
+
+#. type: Plain text
+#: src/lib/base.en.conf:56
+msgid "export index_recent_slide_title='Slides listing'"
+msgstr ""
+
+#. type: Plain text
+#: src/lib/base.en.conf:58
+msgid "export index_category_slide_title='Slides by category'"
+msgstr ""
+
+#. type: Plain text
+#: src/lib/base.en.conf:60
+msgid "export index_slide_url=\"$(url-for \"$lang/$(coll2path \"$lang\" slide)\")\""
+msgstr ""
+
+#. type: Plain text
+#: src/lib/base.en.conf:61
+msgid "export feed_slide_title=\"EuAndreh's slides\""
+msgstr ""
+
+#. type: Plain text
 #: src/lib/commencement.en.conf:2
 msgid "#!/bin/sh"
 msgstr ""
@@ -188,10 +213,15 @@ msgid "export pastebin_collection_name='pastebin'"
 msgstr ""
 
 #. type: Plain text
-#: src/lib/commencement.en.conf:7
+#: src/lib/commencement.en.conf:8
 msgid "export til_collection_name='til'"
 msgstr ""
 
+#. type: Plain text
+#: src/lib/commencement.en.conf:9
+msgid "export slide_collection_name='slide'"
+msgstr ""
+
 #. type: Content of: <p>
 #: src/lib/comment.en.html:3
 msgid ""
diff --git a/v2/po/pt.po b/v2/po/pt.po
index faa51af..a0b99f7 100644
--- a/v2/po/pt.po
+++ b/v2/po/pt.po
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: \n"
-"POT-Creation-Date: 2023-04-10 16:03-0300\n"
+"POT-Creation-Date: 2023-04-10 21:07-0300\n"
 "PO-Revision-Date: \n"
 "Last-Translator: \n"
 "Language-Team: \n"
@@ -169,11 +169,49 @@ msgstr ""
 "export index_til_url=\"$(url-for \"$lang/$(coll2path \"$lang\" til)\")\""
 
 #. type: Plain text
-#: src/lib/base.en.conf:50
+#: src/lib/base.en.conf:51
 msgid "export feed_til_title=\"EuAndreh's TIL\""
 msgstr "export feed_til_title=\"HEA do EuAndreh\""
 
 #. type: Plain text
+#: src/lib/base.en.conf:54
+#, fuzzy
+#| msgid "export index_article_title='Blog'"
+msgid "export index_slide_title='Slides'"
+msgstr "export index_article_title='Blog'"
+
+#. type: Plain text
+#: src/lib/base.en.conf:56
+#, fuzzy
+#| msgid "export index_recent_til_title='TIL listing'"
+msgid "export index_recent_slide_title='Slides listing'"
+msgstr "export index_recent_til_title='HEA recentes'"
+
+#. type: Plain text
+#: src/lib/base.en.conf:58
+#, fuzzy
+#| msgid "export index_category_article_title='Articles by category'"
+msgid "export index_category_slide_title='Slides by category'"
+msgstr "export index_category_article_title='Artigos por categoria'"
+
+#. type: Plain text
+#: src/lib/base.en.conf:60
+#, fuzzy
+#| msgid ""
+#| "export index_til_url=\"$(url-for \"$lang/$(coll2path \"$lang\" til)\")\""
+msgid ""
+"export index_slide_url=\"$(url-for \"$lang/$(coll2path \"$lang\" slide)\")\""
+msgstr ""
+"export index_til_url=\"$(url-for \"$lang/$(coll2path \"$lang\" til)\")\""
+
+#. type: Plain text
+#: src/lib/base.en.conf:61
+#, fuzzy
+#| msgid "export feed_article_title=\"EuAndreh's articles\""
+msgid "export feed_slide_title=\"EuAndreh's slides\""
+msgstr "export feed_article_title=\"Artigos do EuAndreh\""
+
+#. type: Plain text
 #: src/lib/commencement.en.conf:2
 msgid "#!/bin/sh"
 msgstr ""
@@ -189,10 +227,17 @@ msgid "export pastebin_collection_name='pastebin'"
 msgstr "export pastebin_collection_name='pastebin'"
 
 #. type: Plain text
-#: src/lib/commencement.en.conf:7
+#: src/lib/commencement.en.conf:8
 msgid "export til_collection_name='til'"
 msgstr "export til_collection_name='hea'"
 
+#. type: Plain text
+#: src/lib/commencement.en.conf:9
+#, fuzzy
+#| msgid "export til_collection_name='til'"
+msgid "export slide_collection_name='slide'"
+msgstr "export til_collection_name='hea'"
+
 #. type: Content of: <p>
 #: src/lib/comment.en.html:3
 msgid ""
diff --git a/v2/src/bin/makemake b/v2/src/bin/makemake
index c6e3407..3956844 100755
--- a/v2/src/bin/makemake
+++ b/v2/src/bin/makemake
@@ -144,6 +144,17 @@ for lang in $(langs); do
 		printf '\n\n'
 	done
 
+	coll_path="$(coll2path "$lang" slide)"
+	git ls-files "$CONTENT_PREFIX/$lang/$coll_path"*.slides |
+		varlist "slide.$lang.slides"
+	git ls-files "$CONTENT_PREFIX/$lang/$coll_path"*.slides |
+		sed 's/^\(.*\)\.slides$/\1.pdf: \1.ps/'
+	printf '\n\n'
+
+	echo "slide.$lang.pdf = \$(slide.$lang.slides:.slides=.pdf)"
+	echo "all-generated.$lang.slides = \$(slide.$lang.slides)"
+	echo "all-generated.$lang.pdf = \$(slide.$lang.pdf)"
+
 	for e in $(extensions); do
 		{
 			if ! printf '%s\n' "$e" | grep -qE "$page_ext_filter"; then
@@ -185,7 +196,7 @@ for lang in $(langs); do
 		sed "s|^\(.*\)\$|$CONTENT_PREFIX/$lang/\1feed.xml|" |
 		varlist "all-generated.$lang.xml"
 
-	extensions '.series' '.categories' '.extrahtml' '.extrafeeds' '.index' '.xml' |
+	extensions '.series' '.categories' '.extrahtml' '.extrafeeds' '.index' '.xml' '.pdf' |
 		sed "s|^\(.*\)\$|\$(all-generated.$lang\1)|" |
 		varlist "all-generated.$lang"
 
@@ -212,7 +223,7 @@ printf 'svgs = $(svgs.uncolored:.uncolored=)\n\n'
 } > "$CONTENT_PREFIX"/.gitignore
 
 
-for e in $(extensions '.series' '.categories' '.extrahtml' '.extrafeeds' '.index' '.xml'); do
+for e in $(extensions '.series' '.categories' '.extrahtml' '.extrafeeds' '.index' '.xml' '.pdf'); do
 	langs |
 		sed "s|^\(.*\)\$|\$(all-generated.\1$e)|" |
 		varlist "all-generated$e"
@@ -237,4 +248,6 @@ git ls-files "$CONTENT_PREFIX"/ |
 	grep -v '\.md$' |
 	grep -v '\.page$' |
 	grep -v '\.uncolored$' |
+	grep -v '\.slides$' |
+	grep -v '\.ps$' |
 	varlist 'static-content'
diff --git a/v2/src/content/en/slide/local-first.ps b/v2/src/content/en/slide/local-first.ps
new file mode 100644
index 0000000..44c5858
--- /dev/null
+++ b/v2/src/content/en/slide/local-first.ps
@@ -0,0 +1,522 @@
+%!PS-Adobe-3.0 
+%%DocumentMedia: SLIDE 842 595 0 () () 
+%%EndComments 
+%%BeginDefaults 
+%%PageMedia: SLIDE
+%%EndDefaults 
+<< /PageSize [842 595] /ImagingBBox null >> setpagedevice 
+
+/reencode {
+	exch
+	findfont
+	dup length dict
+	begin
+	{       
+		1 index /FID ne
+		{ def }
+		{ pop pop }
+		ifelse
+	} forall
+	/Encoding ISOLatin1Encoding def
+	currentdict
+	end
+	definefont pop
+} def
+/Courier /Courier reencode
+/Helvetica /Helvetica reencode
+/Times /Times reencode
+/Times-Italic /Times-Italic reencode
+
+
+/headerheight 77 def
+
+/frontfontsz  60 def
+/authorfontsz 40    def
+/titlefontsz  40     def
+/mainfontsz   30      def
+/codefontsz   18      def
+/tinyfontsz   18      def
+
+/titlefont  /Helvetica     findfont titlefontsz  scalefont def
+/mainfont   /Courier      findfont mainfontsz   scalefont def
+/codefont   /Courier      findfont codefontsz   scalefont def
+/tinyfont   /Times      findfont tinyfontsz   scalefont def
+/frontfont  /Helvetica findfont frontfontsz  scalefont def
+/authorfont /Times-Italic    findfont authorfontsz scalefont def
+/authorfonttwo /Times findfont authorfontsz scalefont def
+
+
+/pagewidth  842 def
+/pageheight 595 def
+/leftmargin 30  def
+/topmargin  595 def
+
+/pad 10 def
+
+/titlefonth  titlefontsz  pad add def
+/mainfonth   mainfontsz   pad add def
+/codefonth   codefontsz   pad add def
+/tinyfonth   tinyfontsz   pad add def
+/frontfonth  frontfontsz  pad add def
+/authorfonth authorfontsz pad add def
+
+/headermargin
+	pageheight headerheight titlefonth sub 2 div titlefontsz add sub
+def
+/rightmargin pagewidth leftmargin sub def
+/tbtop topmargin def
+/ypos topmargin def
+
+/xcur { currentpoint pop      } def
+/ycur { currentpoint exch pop } def
+
+/wordbreak ( ) def
+/linewrap {
+	/proc exch def
+	/linelength exch def
+	/textstring exch def
+	/breakwidth wordbreak stringwidth pop def
+	/curwidth 0 def
+	/lastwordbreak 0 def
+	/startchar 0 def
+	/restoftext textstring def
+	{
+		restoftext wordbreak search
+		{
+			/nextword exch def pop
+			/restoftext exch def
+			/wordwidth nextword stringwidth pop def
+			curwidth wordwidth add linelength gt
+			{
+				textstring startchar
+				lastwordbreak startchar sub
+				getinterval proc
+				/startchar lastwordbreak def
+				/curwidth wordwidth breakwidth add def
+			}
+			{
+				/curwidth curwidth wordwidth add
+				breakwidth add def 
+			} ifelse
+			/lastwordbreak lastwordbreak
+			nextword length add 1 add def
+		}
+		{
+			pop exit
+		} ifelse
+	} loop
+	/lastchar textstring length def
+	textstring startchar lastchar startchar sub 
+	getinterval proc
+} def
+
+/line {
+	0 0 0 setrgbcolor
+	0.5 setlinewidth
+	leftmargin ypos moveto
+	rightmargin ypos lineto
+	stroke
+} def
+
+/center {
+	dup
+	/str exch def
+	/sw str stringwidth pop def
+	/xpos pagewidth sw sub 2 div xcur sub def
+	xpos 0 rmoveto
+} def
+
+/objcenter {
+	pagewidth exch sub 2 div 0 translate
+} def
+
+/s {
+	/tbtop topmargin def
+	/ypos topmargin def
+	1 1 1 setrgbcolor
+	0 setlinewidth
+	newpath
+	0 pageheight moveto
+	pagewidth pageheight lineto
+	pagewidth 0 lineto
+	0 0 lineto
+	closepath
+	fill
+	stroke
+} def
+
+/l {
+	/h exch def
+	/ypos ypos h sub def
+	leftmargin ypos moveto
+} def
+
+/title {
+	frontfonth l
+	frontfont setfont
+	0.5 0.5 0.9 setrgbcolor
+	{ pagewidth leftmargin 2 mul sub }
+	{ frontfonth l center show }
+	linewrap
+	frontfonth 2 div l
+	frontfonth l
+} def
+
+/author {
+	authorfont setfont
+	0 0 0 setrgbcolor
+	{ pagewidth leftmargin 2 mul sub }
+	{ authorfonth l center show }
+	linewrap
+} def
+
+/authortwo {
+	authorfonttwo setfont
+	0 0 0 setrgbcolor
+	{ pagewidth leftmargin 2 mul sub }
+	{ authorfonth l center show }
+	linewrap
+} def
+
+/header {
+	/ypos pageheight headerheight sub def
+	0 0 0 setrgbcolor
+	0 setlinewidth
+	newpath
+	0 pageheight moveto
+	pagewidth pageheight lineto
+	pagewidth ypos lineto
+	0 ypos lineto
+	closepath
+	fill
+	stroke
+	leftmargin headermargin moveto
+	titlefont setfont 
+	0.5 0.5 0.9 setrgbcolor
+	center show
+	leftmargin ypos moveto
+} def
+
+/n {
+	mainfont setfont
+	0 0 0 setrgbcolor
+	{ pagewidth leftmargin 2 mul sub }
+	{ mainfonth l show }
+	linewrap
+} def
+
+/cn {
+	codefont setfont
+	0 0 0 setrgbcolor
+	{ pagewidth leftmargin 2 mul sub }
+	{ codefonth l show }
+	linewrap
+} def
+
+/tn {
+	tinyfont setfont
+	0 0 0 setrgbcolor
+	{ pagewidth leftmargin 2 mul sub }
+	{ tinyfonth l show }
+	linewrap
+} def
+
+/is {
+	/level1 save def
+	/showpage {} def
+} def
+
+/ie {
+	level1 restore
+} def
+
+/bs {
+	/tbtop ypos def
+} def
+
+/be {
+	/tm tbtop pad sub def
+	/bm ypos pad sub def
+	newpath
+	leftmargin 10 sub tm moveto
+	rightmargin tm lineto
+	rightmargin bm lineto
+	leftmargin 10 sub bm lineto
+	closepath
+	0 0 0 setrgbcolor
+	0.5 setlinewidth
+	stroke
+} def
+( On "local-first") title
+(Beyond the CRDT silver bullet) authortwo
+showpage
+%%Page: 1 1
+s
+( Part 1) header
+( Exposition) title
+showpage
+%%Page: 2 2
+s
+( Target) header
+() n
+() n
+() n
+(- documents) n
+(- files) n
+(- personal data repositories) n
+() n
+() n
+(Not: banking services, e-commerce, social networking, ride-sharing, etc.) n
+showpage
+%%Page: 3 3
+s
+() n
+() n
+() n
+( 7 ideals for local-first software) title
+showpage
+%%Page: 4 4
+s
+() n
+() n
+() n
+( 1 - no spinners: your work at your fingertips) title
+showpage
+%%Page: 5 5
+s
+() n
+() n
+() n
+( 2 - your work is not trapped on one device) title
+showpage
+%%Page: 6 6
+s
+() n
+() n
+() n
+( 3 - the network is optional) title
+showpage
+%%Page: 7 7
+s
+() n
+() n
+() n
+( 4 - seamless collaboration with your colleagues) title
+showpage
+%%Page: 8 8
+s
+() n
+() n
+() n
+( 5 - the long now) title
+showpage
+%%Page: 9 9
+s
+() n
+() n
+() n
+( 6 - security and privacy by default ) title
+showpage
+%%Page: 10 10
+s
+() n
+() n
+() n
+( 7 - you retain ultimate ownership and control) title
+showpage
+%%Page: 11 11
+s
+( Towards a better future) header
+() n
+() n
+() n
+() n
+( CRDTs \(Conflict-free Replicated Data Types\) as a Foundational Technology) authortwo
+showpage
+%%Page: 12 12
+s
+( Use case) header
+() n
+bs
+(# in node A and node B) cn
+(s = "Hello, World") cn
+() cn
+(# in node A) cn
+(s = "Hello, Alice") cn
+() cn
+(# in node B) cn
+(s = "Hello, Bob") cn
+be
+(How to reconcile those?) n
+(- Hello, ABloibce) n
+(- Hello, AliceBob) n
+(- Hello, BobAlice) n
+(- Hello, Alice) n
+(...) n
+showpage
+%%Page: 13 13
+s
+( Existing CRDTs differ) title
+(- performance) n
+(- storage) n
+(- compression) n
+(- metadata overhead) n
+showpage
+%%Page: 14 14
+s
+() n
+() n
+() n
+( Hint towards the "automerge" CRDT) title
+showpage
+%%Page: 15 15
+s
+() n
+() n
+() n
+() n
+() n
+() n
+(show comparison table, page 9) author
+showpage
+%%Page: 16 16
+s
+( Part 2) header
+( Critique) title
+showpage
+%%Page: 17 17
+s
+( Software license) header
+() n
+() n
+() n
+("In our opinion, maintaining control and ownership of data does not mean that the software must necessarily be open source.") author
+showpage
+%%Page: 18 18
+s
+( Example 1 - intentional restriction) header
+() n
+bs
+(#!/bin/sh) cn
+(TODAY="$\(date +%s\)") cn
+(LICENSE_EXPIRATION="$\(date -d 2020-10-27 +%s\)") cn
+(if [ "$TODAY" -ge "$LICENSE_EXPIRATION" ]; then) cn
+(	echo 'License expired!') cn
+(	exit 1) cn
+(fi) cn
+(echo $\(\(2 + 2\)\)) cn
+be
+() n
+bs
+(# today) cn
+($ ./useful-adder.sh) cn
+(4) cn
+(# tomorrow) cn
+($ ./useful-adder.sh) cn
+(License expired!) cn
+be
+showpage
+%%Page: 19 19
+s
+( Example 2 - unintentional restriction) header
+() n
+bs
+(# today) cn
+($ useful-program) cn
+(# ... useful output ...) cn
+() cn
+(# tomorrow, with more data) cn
+($ useful-program) cn
+(ERROR: Panic!  Stack overflow!) cn
+be
+showpage
+%%Page: 20 20
+s
+() n
+() n
+( local-first *requires* free software ) title
+(Otherwise "The Long Now" \(ideal nº5\) is lost) n
+showpage
+%%Page: 21 21
+s
+( Denial of existing solutions) header
+() n
+() n
+("In principle it is possible to collaborate without a repository service, e.g. by sending patch files by email, but the majority of Git users rely on GitHub." ) author
+() n
+(Solution: either GitHub+CRDTs or git send-email ) n
+showpage
+%%Page: 22 22
+s
+( Plain-text formats) header
+() n
+("Git is highly optimized for code and similar line-based text file") author
+() n
+(It even pulls software to the plain text directtion, e.g.:) n
+(- delivery-templates) n
+(- common-core.protocols.config) n
+() n
+(Why not exploit that more?) n
+showpage
+%%Page: 23 23
+s
+( Ditching of web applications) header
+() n
+() n
+("The architecture of web apps remains fundamentally server-centric) author
+() n
+(Disagree.  Contrast PouchDB with Android Instant Apps) n
+showpage
+%%Page: 24 24
+s
+( Costs are underrated) header
+() n
+(- storage) n
+(- backups) n
+(- maintenance) n
+() n
+(Example: blog vs vlog) n
+showpage
+%%Page: 25 25
+s
+( Real-time collaboration a bit overrated) header
+() n
+(It is only possible on the presence of reliable, medium-quality network connection) n
+() n
+() n
+("X also works when inside an elevator, subway or plane!") author
+showpage
+%%Page: 26 26
+s
+( On CRDTs and developer experience) header
+() n
+("For an app developer, how does the use of a CRDT-based data layer compare to existing storage layers like a SQL database, a filesystem, or CoreData?  Is a distributed system harder to write software for?) author
+() n
+(YES.) authortwo
+() n
+(See "A Note on Distributed Computing") n
+showpage
+%%Page: 27 27
+s
+( Conclusion) header
+() n
+(Why this is a "paper I love": it took offline-first and ran with it.) n
+() n
+(But a pinch of CRDT won't make the world local-first. ) n
+() n
+(The tricky part is the end of the sentence: "in spite of the Cloud".) n
+showpage
+%%Page: 28 28
+s
+( References) header
+() n
+(1. "Local-First Software: You Own Your Data, in spite of the Cloud", by M. Kleppmann, A. Wiggins, P. Van Hardenberg and M. F. McGranaghan) n
+(2. The Morning Paper article) n
+(3. "A Note on Distributed Compiting", by J. Waldo, G. Wyant, A. Wollrath and S. Kendall) n
+(4. these slides: euandre.org/slide/) n
+(5. prose version of this presentation) n
+(6. view source) n
+
+showpage
+
+%%EOF
diff --git a/v2/src/content/en/slide/local-first.slides b/v2/src/content/en/slide/local-first.slides
new file mode 100644
index 0000000..fd83115
--- /dev/null
+++ b/v2/src/content/en/slide/local-first.slides
@@ -0,0 +1,204 @@
+# On "local-first"
+
+@Beyond the CRDT silver bullet
+
+---
+## Part 1
+# Exposition
+
+---
+## Target
+...
+- documents
+- files
+- personal data repositories
+..
+Not: banking services, e-commerce, social networking, ride-sharing, etc.
+
+---
+...
+# 7 ideals for local-first software
+
+---
+...
+# 1 - no spinners: your work at your fingertips
+
+---
+...
+# 2 - your work is not trapped on one device
+
+---
+...
+# 3 - the network is optional
+
+---
+...
+# 4 - seamless collaboration with your colleagues
+
+---
+...
+# 5 - the long now
+
+---
+...
+# 6 - security and privacy by default 
+
+---
+...
+# 7 - you retain ultimate ownership and control
+
+---
+## Towards a better future
+....
+@ CRDTs (Conflict-free Replicated Data Types) as a Foundational Technology
+
+---
+## Use case
+.
+	# in node A and node B
+	s = "Hello, World"
+	
+	# in node A
+	s = "Hello, Alice"
+	
+	# in node B
+	s = "Hello, Bob"
+
+How to reconcile those?
+- Hello, ABloibce
+- Hello, AliceBob
+- Hello, BobAlice
+- Hello, Alice
+\...
+
+---
+# Existing CRDTs differ
+- performance
+- storage
+- compression
+- metadata overhead
+
+---
+...
+# Hint towards the "automerge" CRDT
+
+---
+......
+@@show comparison table, page 9
+
+---
+## Part 2
+# Critique
+
+---
+## Software license
+...
+@@"In our opinion, maintaining control and ownership of data does not mean that the software must necessarily be open source."
+
+---
+## Example 1 - intentional restriction
+.
+	#!/bin/sh
+	TODAY="$(date +%s)"
+	LICENSE_EXPIRATION="$(date -d 2020-10-27 +%s)"
+	if [ "$TODAY" -ge "$LICENSE_EXPIRATION" ]; then
+		echo 'License expired!'
+		exit 1
+	fi
+	echo $((2 + 2))
+.
+	# today
+	$ ./useful-adder.sh
+	4
+
+	# tomorrow
+	$ ./useful-adder.sh
+	License expired!
+---
+## Example 2 - unintentional restriction
+.
+	# today
+	$ useful-program
+	# ... useful output ...
+	
+	# tomorrow, with more data
+	$ useful-program
+	ERROR: Panic!  Stack overflow!
+
+---
+..
+# local-first *requires* free software 
+
+Otherwise "The Long Now" (ideal nº5) is lost
+
+---
+## Denial of existing solutions
+..
+@@"In principle it is possible to collaborate without a repository service, e.g. by sending patch files by email, but the majority of Git users rely on GitHub." 
+.
+Solution: either GitHub+CRDTs or git send-email 
+
+---
+## Plain-text formats
+.
+@@"Git is highly optimized for code and similar line-based text file"
+.
+It even pulls software to the plain text directtion, e.g.:
+- delivery-templates
+- common-core.protocols.config
+.
+Why not exploit that more?
+
+---
+## Ditching of web applications
+..
+@@"The architecture of web apps remains fundamentally server-centric
+.
+% FIXME: links
+Disagree.  Contrast PouchDB with Android Instant Apps
+
+---
+## Costs are underrated
+.
+- storage
+- backups
+- maintenance
+.
+Example: blog vs vlog
+
+---
+## Real-time collaboration a bit overrated
+.
+It is only possible on the presence of reliable, medium-quality network connection
+..
+@@"X also works when inside an elevator, subway or plane!"
+
+---
+## On CRDTs and developer experience
+.
+@@"For an app developer, how does the use of a CRDT-based data layer compare to existing storage layers like a SQL database, a filesystem, or CoreData?  Is a distributed system harder to write software for?
+.
+@YES.
+.
+% FIXME: link
+See "A Note on Distributed Computing"
+
+---
+## Conclusion
+.
+Why this is a "paper I love": it took offline-first and ran with it.
+.
+But a pinch of CRDT won't make the world local-first. 
+.
+The tricky part is the end of the sentence: "in spite of the Cloud".
+
+---
+## References
+.
+% FIXME: links
+1. "Local-First Software: You Own Your Data, in spite of the Cloud", by M. Kleppmann, A. Wiggins, P. Van Hardenberg and M. F. McGranaghan
+2. The Morning Paper article
+3. "A Note on Distributed Compiting", by J. Waldo, G. Wyant, A. Wollrath and S. Kendall
+4. these slides: euandre.org/slide/
+5. prose version of this presentation
+6. view source
diff --git a/v2/src/content/en/slide/rollouts.ps b/v2/src/content/en/slide/rollouts.ps
new file mode 100644
index 0000000..0a8b39f
--- /dev/null
+++ b/v2/src/content/en/slide/rollouts.ps
@@ -0,0 +1,500 @@
+%!PS-Adobe-3.0 
+%%DocumentMedia: SLIDE 842 595 0 () () 
+%%EndComments 
+%%BeginDefaults 
+%%PageMedia: SLIDE
+%%EndDefaults 
+<< /PageSize [842 595] /ImagingBBox null >> setpagedevice 
+
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+	exch
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+	frontfonth l
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+	/ypos pageheight headerheight sub def
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+	0 pageheight moveto
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+	tinyfont setfont
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+
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+	/level1 save def
+	/showpage {} def
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+
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+	level1 restore
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+
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+	/tm tbtop pad sub def
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+showpage
+%%Page: 1 1
+s
+( Rollout, feature flag, experiment, operational toggle) title
+(Different use cases for backend, frontend and mobile ) authortwo
+showpage
+%%Page: 2 2
+s
+() n
+() n
+() n
+( "Feature flags" tend to come up when talking about continuous deployment) title
+showpage
+%%Page: 3 3
+s
+() n
+() n
+() n
+() n
+(CI: continuous integration) authortwo
+() n
+(CD: continuous delivery) authortwo
+() n
+(CD: continuous deployment) authortwo
+showpage
+%%Page: 4 4
+s
+( Types) header
+() n
+() n
+() n
+(1. rollout) n
+(2. feature flag) n
+(3. experiment) n
+(4. operational toggle) n
+showpage
+%%Page: 5 5
+s
+( Rollout) header
+( For *rolling out* a new version of software) title
+(Short-lived using percentages) n
+(- a new deployment of kubernetes) n
+(- new APK released to the Play Store) n
+showpage
+%%Page: 6 6
+s
+( Feature flag) header
+( For turning a feature *on* or *off* ) title
+(Medium-lived using allow list, A/B test, percentage, app version, etc.) n
+(- :new-chargeback-flow) n
+(- :new-debit-card-activation-screen) n
+showpage
+%%Page: 7 7
+s
+( Experiment) header
+( For analysing behaviour) title
+(Medium-lived using allow list and A/B test) n
+(- :debit-withdrawal-test) n
+showpage
+%%Page: 8 8
+s
+( Operational toggle) header
+( For disabling features in #crash-like situations) title
+(Long-lived using percentage) n
+(- :bank-barcode-payment) n
+(- :savings-bank-barcode-query-provider) n
+showpage
+%%Page: 9 9
+s
+() n
+() n
+(We know know about the types) authortwo
+( But they have different relevance for backend, frontend and mobile) title
+showpage
+%%Page: 10 10
+s
+( backend) header
+() n
+() n
+(1. rollout: k8s blue/green, canary and ~common-rollout~ common-xp) n
+(2. feature flag: ~common-rollout~ common-xp and datasets) n
+(3. experiment: common-xp) n
+(4. operational toggle: ~common-rollout~ common-xp ) n
+showpage
+%%Page: 11 11
+s
+( frontend) header
+() n
+() n
+(1. rollout: CDN and page refreshes) n
+(2. feature flag: percentages and maybe IPs \(no :customer/id on the website\)) n
+(3. experiment: via dynamic backend control) n
+(4. operational toggle: via dynamic backend control ) n
+showpage
+%%Page: 12 12
+s
+( backend) header
+() n
+() n
+(1. rollout: app stores) n
+(2. feature flag: via dynamic backend control) n
+(3. experiment: via dynamic backend control) n
+(4. operational toggle: via dynamic backend control ) n
+showpage
+%%Page: 13 13
+s
+() n
+() n
+(Key differentiator is) authortwo
+( how much *control* we have over the environment) title
+showpage
+%%Page: 14 14
+s
+( backend) header
+( full control) title
+showpage
+%%Page: 15 15
+s
+( frontend) header
+( partial control) title
+(We choose when to make a new version available ) n
+showpage
+%%Page: 16 16
+s
+( mobile) header
+( very limited control) title
+(- app stores can restrict updates \(worse for iOS\)) n
+(- customers still have to download new versions ) n
+showpage
+%%Page: 17 17
+s
+( Costs) title
+(- more complex code) n
+(- compatibility with old app versions) n
+(- nesting is exponential) n
+showpage
+%%Page: 18 18
+s
+( Benefits) title
+(- dynamicity) n
+showpage
+%%Page: 19 19
+s
+( weighting costs × benefits) header
+( The less control we have, the more we value dynamicity ) title
+showpage
+%%Page: 20 20
+s
+( weighting costs × benefits) header
+() n
+() n
+() n
+(- backend: sometimes worth the cost) n
+(- frontend: almost always worth the cost) n
+(- mobile: *always* worth the cost) n
+showpage
+%%Page: 21 21
+s
+() n
+() n
+() n
+( Best practices) title
+showpage
+%%Page: 22 22
+s
+( dynamic content > feature flag) title
+(Always true for mobile, almost always for frontend ) n
+showpage
+%%Page: 23 23
+s
+( Use :include-list for named groups ) title
+(Always true for backend, frontend and mobile ) n
+bs
+({:rules) cn
+( #{{:types   :include-list) cn
+(    :content {:filename "debit-team-members.txt"}}}}) cn
+be
+showpage
+%%Page: 24 24
+s
+( Always use :app-version) title
+(Only for mobile) n
+bs
+({:rules) cn
+( #{{:types   :app-version) cn
+(    :content {:min-version #{{:platform :android) cn
+(                              :code     1000000}) cn
+(                             {:platform :ios) cn
+(                              :code     2000000}}}}}}) cn
+be
+showpage
+%%Page: 25 25
+s
+( Extend ~common-rollout~ common-xp if required) title
+(That's how :include-list, :app-version, etc. were born) n
+showpage
+%%Page: 26 26
+s
+( Beware of many nested feature flags) title
+(True for backend, frontend and mobile) n
+showpage
+%%Page: 27 27
+s
+( Don't delete app-facing feature flags) title
+(True for mobile) n
+showpage
+%%Page: 28 28
+s
+() n
+() n
+() n
+( Include a feature flag on the whiteboarding phase) title
+showpage
+%%Page: 29 29
+s
+() n
+() n
+() n
+( Include deleting/retiring the feature flag at the end) title
+showpage
+%%Page: 30 30
+s
+( Avoid renaming a feature flag) title
+(Use :app-version with :min-version instead) n
+showpage
+%%Page: 31 31
+s
+() n
+() n
+() n
+( And most importantly...) title
+showpage
+%%Page: 32 32
+s
+( *Always* rely on a feature flag on the app) title
+(Never do a hotfix, avoid expedited releases at all costs) n
+showpage
+%%Page: 33 33
+s
+( References) header
+() n
+(1. "Feature Toggles \(aka Feature Flags\)", by Pete Hodgson) n
+(2. "Continuous integration vs. delivery vs. deployment", by Sten Pittet) n
+(3. Accelerate, by N. Forsgren, J. Humble and G. Kim) n
+(4. these slides: euandre.org/slide/) n
+(5. prose version of this presentation) n
+(6. view source) n
+
+showpage
+
+%%EOF
diff --git a/v2/src/content/en/slide/rollouts.slides b/v2/src/content/en/slide/rollouts.slides
new file mode 100644
index 0000000..aed745e
--- /dev/null
+++ b/v2/src/content/en/slide/rollouts.slides
@@ -0,0 +1,208 @@
+---
+# Rollout, feature flag, experiment, operational toggle
+
+@Different use cases for backend, frontend and mobile 
+
+---
+...
+# "Feature flags" tend to come up when talking about continuous deployment
+
+---
+....
+@CI: continuous integration
+.
+@CD: continuous delivery
+.
+@CD: continuous deployment
+
+---
+## Types
+...
+1. rollout
+2. feature flag
+3. experiment
+4. operational toggle
+
+% {favicon.svg}
+---
+## Rollout
+
+# For *rolling out* a new version of software
+
+Short-lived using percentages
+
+% FIXME: links
+- a new deployment of kubernetes
+- new APK released to the Play Store
+
+---
+## Feature flag
+
+# For turning a feature *on* or *off* 
+
+Medium-lived using allow list, A/B test, percentage, app version, etc.
+
+- :new-chargeback-flow
+- :new-debit-card-activation-screen
+
+---
+## Experiment
+
+# For analysing behaviour
+
+Medium-lived using allow list and A/B test
+
+- :debit-withdrawal-test
+
+---
+## Operational toggle
+
+# For disabling features in #crash-like situations
+
+Long-lived using percentage
+
+- :bank-barcode-payment
+- :savings-bank-barcode-query-provider
+
+---
+..
+@We know know about the types
+# But they have different relevance for backend, frontend and mobile
+
+---
+## backend
+..
+1. rollout: k8s blue/green, canary and ~common-rollout~ common-xp
+2. feature flag: ~common-rollout~ common-xp and datasets
+3. experiment: common-xp
+4. operational toggle: ~common-rollout~ common-xp 
+
+---
+## frontend
+..
+1. rollout: CDN and page refreshes
+2. feature flag: percentages and maybe IPs (no :customer/id on the website)
+3. experiment: via dynamic backend control
+4. operational toggle: via dynamic backend control 
+
+---
+## backend
+..
+1. rollout: app stores
+2. feature flag: via dynamic backend control
+3. experiment: via dynamic backend control
+4. operational toggle: via dynamic backend control 
+
+---
+..
+@Key differentiator is
+# how much *control* we have over the environment
+
+---
+## backend
+# full control
+% FIXME: emoji
+% 🎉
+
+---
+## frontend
+# partial control
+We choose when to make a new version available 
+
+---
+## mobile
+# very limited control
+- app stores can restrict updates (worse for iOS)
+- customers still have to download new versions 
+
+---
+# Costs
+- more complex code
+- compatibility with old app versions
+- nesting is exponential
+
+---
+# Benefits
+- dynamicity
+
+---
+## weighting costs × benefits
+# The less control we have, the more we value dynamicity 
+
+---
+## weighting costs × benefits
+...
+- backend: sometimes worth the cost
+- frontend: almost always worth the cost
+- mobile: *always* worth the cost
+
+---
+...
+# Best practices
+
+---
+# dynamic content > feature flag
+Always true for mobile, almost always for frontend 
+
+---
+# Use :include-list for named groups 
+Always true for backend, frontend and mobile 
+
+	{:rules
+	 #{{:types   :include-list
+	    :content {:filename "debit-team-members.txt"}}}}
+
+---
+# Always use :app-version
+Only for mobile
+
+	{:rules
+	 #{{:types   :app-version
+	    :content {:min-version #{{:platform :android
+	                              :code     1000000}
+	                             {:platform :ios
+	                              :code     2000000}}}}}}
+
+---
+# Extend ~common-rollout~ common-xp if required
+
+That's how :include-list, :app-version, etc. were born
+
+---
+# Beware of many nested feature flags
+True for backend, frontend and mobile
+
+---
+# Don't delete app-facing feature flags
+True for mobile
+
+---
+...
+# Include a feature flag on the whiteboarding phase
+
+---
+...
+# Include deleting/retiring the feature flag at the end
+
+---
+# Avoid renaming a feature flag
+Use :app-version with :min-version instead
+
+---
+...
+# And most importantly...
+
+---
+# *Always* rely on a feature flag on the app
+Never do a hotfix, avoid expedited releases at all costs
+
+---
+## References
+.
+% FIXME: links
+1. "Feature Toggles (aka Feature Flags)", by Pete Hodgson
+2. "Continuous integration vs. delivery vs. deployment", by Sten Pittet
+3. Accelerate, by N. Forsgren, J. Humble and G. Kim
+4. these slides: euandre.org/slide/
+5. prose version of this presentation
+6. view source
diff --git a/v2/src/lib/base.en.conf b/v2/src/lib/base.en.conf
index ba0200b..144f0a0 100644
--- a/v2/src/lib/base.en.conf
+++ b/v2/src/lib/base.en.conf
@@ -48,3 +48,14 @@ export index_category_til_title='TIL by category'
 export index_til_url="$(url-for "$lang/$(coll2path "$lang" til)")"
 
 export feed_til_title="EuAndreh's TIL"
+
+
+export index_slide_title='Slides'
+
+export index_recent_slide_title='Slides listing'
+
+export index_category_slide_title='Slides by category'
+
+export index_slide_url="$(url-for "$lang/$(coll2path "$lang" slide)")"
+
+export feed_slide_title="EuAndreh's slides"
diff --git a/v2/src/lib/base.pt.conf b/v2/src/lib/base.pt.conf
index 502aa1d..cb071c8 100644
--- a/v2/src/lib/base.pt.conf
+++ b/v2/src/lib/base.pt.conf
@@ -48,3 +48,14 @@ export index_category_til_title='HEA por categoria'
 export index_til_url="$(url-for "$lang/$(coll2path "$lang" til)")"
 
 export feed_til_title="HEA do EuAndreh"
+
+
+export index_slide_title='Slides'
+
+export index_recent_slide_title='Slides listing'
+
+export index_category_slide_title='Slides by category'
+
+export index_slide_url="$(url-for "$lang/$(coll2path "$lang" slide)")"
+
+export feed_slide_title="EuAndreh's slides"
diff --git a/v2/src/lib/commencement.en.conf b/v2/src/lib/commencement.en.conf
index 9b19b18..70978a2 100644
--- a/v2/src/lib/commencement.en.conf
+++ b/v2/src/lib/commencement.en.conf
@@ -5,3 +5,5 @@ export article_collection_name=''
 export pastebin_collection_name='pastebin'
 
 export til_collection_name='til'
+
+export slide_collection_name='slide'
diff --git a/v2/src/lib/commencement.pt.conf b/v2/src/lib/commencement.pt.conf
index e3b9544..ba6693c 100644
--- a/v2/src/lib/commencement.pt.conf
+++ b/v2/src/lib/commencement.pt.conf
@@ -5,3 +5,5 @@ export article_collection_name=''
 export pastebin_collection_name='pastebin'
 
 export til_collection_name='hea'
+
+export slide_collection_name='slide'