Merge branch 'hw/doc-in-header' into pu

* hw/doc-in-header: (21 commits)
  api-index: remove api doc index files
  trace2: move doc to trace2.h
  submodule-config: move doc to submodule-config.h
  tree-walk: move doc to tree-walk.h
  trace: move doc to trace.h
  run-command: move doc to run-command.h
  parse-options: move doc to parse-options.h
  credential: move doc to credential.h
  argv-array: move doc to argv-array.h
  cache: move doc to cache.h
  sigchain: move doc to sigchain.h
  pathspec: move doc to pathspec.h
  revision: move doc to revision.h
  attr: move doc to attr.h
  refs: move doc to refs.h
  remote: move doc to remote.h and refspec.h
  sha1-array: move doc to sha1-array.h
  merge: move doc to ll-merge.h
  graph: move doc to graph.h and graph.c
  dir: move doc to dir.h
  ...

Documentation/Makefile

@@ -73,7 +73,7 @@ SP_ARTICLES += howto/rebuild-from-update-hook
 SP_ARTICLES += howto/rebase-from-internal-branch
 SP_ARTICLES += howto/keep-canonical-history-correct
 SP_ARTICLES += howto/maintain-git
-API_DOCS = $(patsubst %.txt,%,$(filter-out technical/api-index-skel.txt technical/api-index.txt, $(wildcard technical/api-*.txt)))
+API_DOCS = $(patsubst %.txt,%,$(wildcard technical/api-*.txt))
 SP_ARTICLES += $(API_DOCS)
 
 TECH_DOCS += MyFirstContribution
@@ -97,7 +97,6 @@ TECH_DOCS += technical/shallow
 TECH_DOCS += technical/signature-format
 TECH_DOCS += technical/trivial-merge
 SP_ARTICLES += $(TECH_DOCS)
-SP_ARTICLES += technical/api-index
 
 ARTICLES_HTML += $(patsubst %,%.html,$(ARTICLES) $(SP_ARTICLES))
 HTML_FILTER ?= $(ARTICLES_HTML) $(OBSOLETE_HTML)
@@ -353,7 +352,7 @@ clean:
 	$(RM) *.texi *.texi+ *.texi++ git.info gitman.info
 	$(RM) *.pdf
 	$(RM) howto-index.txt howto/*.html doc.dep
-	$(RM) technical/*.html technical/api-index.txt
+	$(RM) technical/*.html
 	$(RM) SubmittingPatches.txt
 	$(RM) $(cmds_txt) $(mergetools_txt) *.made
 	$(RM) manpage-base-url.xsl
@@ -386,12 +385,8 @@ user-manual.xml: user-manual.txt user-manual.conf asciidoctor-extensions.rb GIT-
 	$(TXT_TO_XML) -d book -o $@+ $< && \
 	mv $@+ $@
 
-technical/api-index.txt: technical/api-index-skel.txt \
-	technical/api-index.sh $(patsubst %,%.txt,$(API_DOCS))
-	$(QUIET_GEN)cd technical && '$(SHELL_PATH_SQ)' ./api-index.sh
-
 technical/%.html: ASCIIDOC_EXTRA += -a git-relative-html-prefix=../
-$(patsubst %,%.html,$(API_DOCS) technical/api-index $(TECH_DOCS)): %.html : %.txt \
+$(patsubst %,%.html,$(API_DOCS) $(TECH_DOCS)): %.html : %.txt \
 	asciidoc.conf GIT-ASCIIDOCFLAGS
 	$(QUIET_ASCIIDOC)$(TXT_TO_HTML) $*.txt
 

Documentation/MyFirstContribution.txt

@@ -504,7 +504,7 @@ Try and run `./bin-wrappers/git psuh -h`. Your command should crash at the end.
 That's because `-h` is a special case which your command should handle by
 printing usage.
 
-Take a look at `Documentation/technical/api-parse-options.txt`. This is a handy
+Take a look at `parse-options.h`. This is a handy
 tool for pulling out options you need to be able to handle, and it takes a
 usage string.
 

Documentation/MyFirstObjectWalk.txt

@@ -17,7 +17,7 @@ revision walk is used for operations like `git log`.
 
 - `Documentation/user-manual.txt` under "Hacking Git" contains some coverage of
   the revision walker in its various incarnations.
-- `Documentation/technical/api-revision-walking.txt`
+- `revision.h`
 - https://eagain.net/articles/git-for-computer-scientists/[Git for Computer Scientists]
   gives a good overview of the types of objects in Git and what your object
   walk is really describing.
@@ -119,9 +119,8 @@ parameters provided by the user over the CLI.
 
 `nr` represents the number of `rev_cmdline_entry` present in the array.
 
-`alloc` is used by the `ALLOC_GROW` macro. Check
-`Documentation/technical/api-allocation-growing.txt` - this variable is used to
-track the allocated size of the list.
+`alloc` is used by the `ALLOC_GROW` macro. Check `cache.h` - this variable is
+used to track the allocated size of the list.
 
 Per entry, we find:
 

Documentation/git-credential.txt

@@ -19,8 +19,7 @@ from system-specific helpers, as well as prompting the user for
 usernames and passwords. The git-credential command exposes this
 interface to scripts which may want to retrieve, store, or prompt for
 credentials in the same manner as Git. The design of this scriptable
-interface models the internal C API; see
-link:technical/api-credentials.html[the Git credential API] for more
+interface models the internal C API; see credential.h for more
 background on the concepts.
 
 git-credential takes an "action" option on the command-line (one of

Documentation/git.txt

@@ -904,9 +904,6 @@ See linkgit:gitworkflows[7] for an overview of recommended workflows.
 See also the link:howto-index.html[howto] documents for some useful
 examples.
 
-The internals are documented in the
-link:technical/api-index.html[Git API documentation].
-
 Users migrating from CVS may also want to
 read linkgit:gitcvs-migration[7].
 

Documentation/gitcredentials.txt

@@ -186,8 +186,7 @@ CUSTOM HELPERS
 --------------
 
 You can write your own custom helpers to interface with any system in
-which you keep credentials. See the documentation for Git's
-link:technical/api-credentials.html[credentials API] for details.
+which you keep credentials. See credential.h for details.
 
 GIT
 ---