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Author SHA1 Message Date
Valentin Gagarin 29c062537d hashes: truncate -> reduce, mention SHA-256 
the longer SHA-256 hashes are not truncated, but in fact processed.

Co-authored-by: Thomas <twatson52@mac.com>
 2022-08-04 12:37:48 +02:00
Valentin Gagarin 9cabba1fc3 mention hard links 
Co-authored-by: Thomas <twatson52@mac.com>
 2022-08-04 12:37:48 +02:00
Valentin Gagarin bac86231ad use "build plan" consistently 2022-08-04 12:37:47 +02:00
Valentin Gagarin 5a5a95696f note customized base32 
Nix omits E O U T characters for some reason.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin de5dea45f7 use correct Nix entity 
Nix itself does care a lot about what type of store object you have.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin fe4c0b8d75 fix typo 
Co-authored-by: Thomas <twatson52@mac.com>
 2022-08-04 12:37:47 +02:00
Valentin Gagarin def80d5777 add subsections to table of contents 2022-08-04 12:37:47 +02:00
Valentin Gagarin c345345dee concept map: align hights 
this has the weird but nice emergent property that terms at the same
height are roughly at the same level of abstraction.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin a28d6878b2 concept map: put closure as it is in the chapter 
this is not as compact any more, but it more closely resembles the
chapter structure, and clearly shows that the closure property is the
key idea on which most of Nix operates.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 475a332025 make concept map even more compact 2022-08-04 12:37:47 +02:00
Valentin Gagarin d8b2f9f772 make concept map more compact 
invert arrows to/from derivation:
- we need closures to form derivations
- we need derivations to perform builds
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 348432f48f store: add concept map 
this should help nativate the chapter by indicating which terms should
be known to understand a given concept.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin ec43977553 store: match chapter introduction to outline 
the various levels of detail should describe the same things.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 7c656d90ca simplify description of diagram 
try not to be too fancy, it's just for reading the diagram out loud.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 631ca18ee6 reword notes on copying 
clarify that we are copying between different stores. we have not
introduced that notion or why it would be interesting, but for now it
should be fine to keep it in context of the store directory.

we could move that later to a more detailed explanation of different
store types.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin c10dcccccd make example a simple list 
using JSON notation is unwarranted and not explained.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 9c544813d7 paths -> path 
use singular for terminology uniformly
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 1681f4e9f3 better explain reference scanning 2022-08-04 12:37:47 +02:00
Valentin Gagarin fa7ad4593d explain store directory 2022-08-04 12:37:47 +02:00
Valentin Gagarin f632816cba add explanation and examples of file system objects 2022-08-04 12:37:47 +02:00
Valentin Gagarin 84ddfbf8fd remove diagonal from operations diagram 2022-08-04 12:37:47 +02:00
Valentin Gagarin 93f721b0d2 remove draft on derivations 2022-08-04 12:37:47 +02:00
Valentin Gagarin 19d8a5d839 move first mention of file system object before diagram 2022-08-04 12:37:47 +02:00
Valentin Gagarin a90fc62b61 make clear that file system is for processes 
Co-authored-by: John Ericson <John.Ericson@Obsidian.Systems>
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 7993ba1f38 constrain garbage collection scope 
garbage collection is now incremental, and may (in theory) never delete all unreferenced objects if it is slow enough.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 195aa28ff7 references are added according to build task 
at this level of abstraction we do not really care about build instructions or what they are, and also build instructions including their arguments really amount to the build task.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 80de4a4804 operations diagram: store' to the right 
this also looks more diverse, hopefully easier to distinguish

Co-authored-by: John Ericson <John.Ericson@Obsidian.Systems>
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 3794618cce add commas between output values 2022-08-04 12:37:47 +02:00
Valentin Gagarin 7b7e4c6340 use singular to match section heading 2022-08-04 12:37:47 +02:00
Valentin Gagarin e63a768e21 use reference links for URLs 2022-08-04 12:37:47 +02:00
Valentin Gagarin 843288a451 add subsections for objects and references 
group description of data instead of spreading it across the section.

that should help direct skimming. as it turns out, people do not
actually read any of that.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 4341849193 move closure property to discussion references 2022-08-04 12:37:47 +02:00
Valentin Gagarin 445f753a82 replace pseudo code by diagrams 
change prose description to visually resemble the data structure
 2022-08-04 12:37:47 +02:00
Valentin Gagarin db8703bcac use reference links for URLs 2022-08-04 12:37:47 +02:00
Valentin Gagarin 4adb6602bd clarify first sentence on store objects 2022-08-04 12:37:47 +02:00
Valentin Gagarin 4eb11d4592 fix grammar for clarity 2022-08-04 12:37:47 +02:00
Valentin Gagarin b84f2bdfdd introduce mapping to Unix files and processes 2022-08-04 12:37:47 +02:00
Valentin Gagarin 207992a71d introduce store and store objects without file system details 
this leaves open implementation details, especially about store paths
and file system objects, and allows explaining them together were it is
more appropriate. also leaves room to carefully introduce the key
insight behind Nix: applying results from programming language theory to
the operating system paradigm of files and processes.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin e72a7874dc beautify rosetta table 
while this may eventually introduce ugly diffs, the table will now
render readably on the terminal (e.g. for `man nix` or `nix --help`)
without further intervention.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin b6b112b366 use reference links for URLs 2022-08-04 12:37:47 +02:00
Valentin Gagarin d5eea66615 introduce build tasks 
while it appears a bit much for the overview, this way we set the stage
for going directly into data types when describing the store, instead of
first having to say what build tasks are and how they relate to build
plans.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 7c3bca1372 revert to build plans in top-level overview 
do not introduce build tasks yet, that is the next level of detail.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 4639b36b53 use reference links for URLs 2022-08-04 12:37:47 +02:00
Valentin Gagarin 2303f84a68 revert to "build plan" in overview diagram 
this displays correct composition again. build inputs and build results
are not part of build plans in terms of data objects.

also this is a much less complicated setup. this will be the first
impression of architecture, and we want to get it right.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 25926c5fc6 Nix store does not underly literally everything 
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 0e63b9bf88 add link from overview to store section 
the overview should only link to the three main concepts presented. the
store is now fairly fleshed out. others can follow later.
 2022-08-04 12:37:47 +02:00
Valentin Gagarin ef81276cc1 architecture overview: add link to command line reference 2022-08-04 12:37:47 +02:00
Valentin Gagarin 68d26010f6 architecture overview: add link to Nix expression language reference 
update summary title to match file contents
 2022-08-04 12:37:47 +02:00
Valentin Gagarin 75ce324052 use singular for class names consistently 2022-08-04 12:37:47 +02:00
Valentin Gagarin 689b32a543 clarify relation of tasks and plans 2022-08-04 12:37:47 +02:00