v2: WIP support for slides

4 files changed, 1434 insertions, 0 deletions

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 @@
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+() n
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+(- personal data repositories) n
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+() n
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+showpage
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+showpage
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+() n
+() n
+() n
+( CRDTs \(Conflict-free Replicated Data Types\) as a Foundational Technology) authortwo
+showpage
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+( Use case) header
+() n
+bs
+(# in node A and node B) cn
+(s = "Hello, World") cn
+() cn
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+(s = "Hello, Alice") cn
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+(- Hello, ABloibce) n
+(- Hello, AliceBob) n
+(- Hello, BobAlice) n
+(- Hello, Alice) n
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+showpage
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+( Existing CRDTs differ) title
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+(- 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
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+showpage
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+() n
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+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
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+s
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+(- delivery-templates) n
+(- common-core.protocols.config) n
+() n
+(Why not exploit that more?) n
+showpage
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+() 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
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+(- 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
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+%%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
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+( Rollout, feature flag, experiment, operational toggle) title
+(Different use cases for backend, frontend and mobile ) authortwo
+showpage
+%%Page: 2 2
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+() n
+() n
+() n
+( "Feature flags" tend to come up when talking about continuous deployment) title
+showpage
+%%Page: 3 3
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+() n
+() n
+() n
+() n
+(CI: continuous integration) authortwo
+() n
+(CD: continuous delivery) authortwo
+() n
+(CD: continuous deployment) authortwo
+showpage
+%%Page: 4 4
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+( 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
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+() 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
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+(    :content {:filename "debit-team-members.txt"}}}}) cn
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+showpage
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+( 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