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Author SHA1 Message Date
Valentin Gagarin
3df1ee2ba5 clarify what explicitly declaring certain dependencies means 2022-08-04 12:37:48 +02:00
Valentin Gagarin
b7309ce624 move architecture to the end 2022-08-04 12:37:48 +02:00
Valentin Gagarin
00a7eaed67 add file system object to table of contents 2022-08-04 12:37:48 +02:00
Valentin Gagarin
db6faf44a9 clarify what store objects can be 
the store of course makes a distinction, but that is not relevant here
 2022-08-04 12:37:48 +02:00
Valentin Gagarin
0228eb8ae7 add Java example on manual dependency declaration 2022-08-04 12:37:48 +02:00
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