;doc: merge/update just/make/shake dev docs

doc/JUST-MAKE-SHAKE.md

@@ -0,0 +1,37 @@
+# Just, make, and Shake
+
+After many years of using on GNU Make for automating project tasks,
+we now primarily use `just` <https://github.com/casey/just> instead.
+`just` is better enough, and clean consolidated efficient project automation is so valuable,
+that it is worthwhile, even though, for now, it is usually not installed by default and it lacks Make's file dependency tracking.
+When dependency tracking, or more powerful code, is really needed, we typically use [[SHAKE|Shake.hs]] instead of make or just.
+
+`Justfile` in the main repo's top directory is where we keep the recipes (scripts);
+this is the starting point for automating hledger project tasks.
+Install and run `just` to see the list of recipes. I suggest using a shorter command alias `j`.
+Eg:
+
+```cli
+$ alias j=just
+$ j             # list all scripts
+$ j h test      # list scripts mentioning "test"
+```
+
+## Make
+
+[GNU Make](https://www.gnu.org/software/make) makefiles are still used in a number of subdirectories - site, finance etc.
+
+## Shake
+
+`Shake.hs` in the main repo's top directory complements the Justfile; 
+it is used for tasks requiring file dependencies or more complex code, such as building documentation and the web site.
+Eg:
+
+```cli
+$ ./Shake.hs   # compile it for speed and git branch independence. Or: just Shake
+$ ./Shake      # list scripts
+```
+
+## tools
+
+Additional helper scripts and tools can be found in the `tools/` subdirectory.

doc/MAKE.md

@@ -1,40 +0,0 @@
-# Make
-
-A Makefile is provided to make common developer tasks easy to remember,
-and to insulate us a little from the ever-evolving Haskell tools ecosystem.
-Using it is entirely optional, but recommended.
-You'll need [GNU Make](https://www.gnu.org/software/make) installed.
-
-The Makefile contains a fair amount of obsolete cruft and needs cleanup. Some tasks (docs, website) are now handled by the [Shake](#shake) file instead.
-
-The Makefile is self-documenting. Run `make` to see a list of the main make rules:
-
-```cli
-$ make
-Makefile:37: -------------------- hledger make rules --------------------
-Makefile:39: make [help] -- list documented rules in this makefile. make -n RULE shows more detail.
-Makefile:204: (INSTALLING:)
-Makefile:206: make install -- download dependencies and install hledger executables to ~/.local/bin or equivalent (with stack)
-Makefile:231: (BUILDING:)
-Makefile:235: make build -- download dependencies and build hledger executables (with stack)
-Makefile:304: make hledgerdev -- quickly build the hledger executable (with ghc and -DDEVELOPMENT)
-...
-```
-
-To see what a make rule will do without actually doing it, use the `-n` flag:
-
-```cli
-$ make build -n
-stack build
-```
-```cli
-$ make test -n
-(stack test \
-		&& echo pkgtest PASSED) || echo pkgtest FAILED
-(stack exec hledger test \
-		&& echo builtintest PASSED) || echo builtintest FAILED
-(COLUMNS=80 PATH=`pwd`/bin:/home/simon/src/hledger/bin:/home/simon/.local/bin:/home/simon/.cabal/bin:/opt/ghc/7.10.1/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/var/lib/gems/1.9.1/bin stack exec -- shelltest --execdir -- -j16 --hide-successes tests \
-		&& echo functest PASSED) || echo functest FAILED
-```
-
-

doc/SHAKE.md

@@ -1,13 +0,0 @@
-# Shake
-
-`Shake.hs` in the top directory complements the Makefile; it is used for some more complex tasks, such as building documentation and the web site.
-
-Compile it: 
-
-    ./Shake.hs   # or, make Shake
-
-See help:
-
-    ./Shake
-
-

doc/dev.md

@@ -27,14 +27,13 @@ and then symlinked into the hledger_site repo for rendering on hledger.org.
 - [FINANCE](FINANCE.md)
 - [Investment Accounting Feature Ladder](investment-accounting-features.md)
 - [ISSUES](ISSUES.md)
+- [JUST-MAKE-SHAKE](JUST-MAKE-SHAKE.md)
 - [LINKS](LINKS.md)
-- [MAKE](MAKE.md)
 - [MOCKUPS](MOCKUPS.md)
 - [PULLREQUESTS](PULLREQUESTS.md)
 - [REGRESSIONS](REGRESSIONS.md)
 - [RELEASING](RELEASING.md)
 - [REPOS](REPOS.md)
-- [SHAKE](SHAKE.md)
 - [TESTS](TESTS.md)
 - [VERSIONNUMBERS](VERSIONNUMBERS.md)