Merge branch 'ab/dedup-config-and-command-docs'

Share the text used to explain configuration variables used by "git
<subcmd>" in "git help <subcmd>" with the text from "git help config".

* ab/dedup-config-and-command-docs:
  docs: add CONFIGURATION sections that fuzzy map to built-ins
  docs: add CONFIGURATION sections that map to a built-in
  log docs: de-duplicate configuration sections
  difftool docs: de-duplicate configuration sections
  notes docs: de-duplicate and combine configuration sections
  apply docs: de-duplicate configuration sections
  send-email docs: de-duplicate configuration sections
  grep docs: de-duplicate configuration sections
  docs: add and use include template for config/* includes

6 files changed, 97 insertions, 40 deletions

diff --git a/Documentation/config/diff.txt b/Documentation/config/diff.txt
index 32f84838ac..35a7bf86d7 100644
--- a/Documentation/config/diff.txt
+++ b/Documentation/config/diff.txt
@@ -178,21 +178,6 @@ diff.<driver>.cachetextconv::
 	Set this option to true to make the diff driver cache the text
 	conversion outputs.  See linkgit:gitattributes[5] for details.
 
-diff.tool::
-	Controls which diff tool is used by linkgit:git-difftool[1].
-	This variable overrides the value configured in `merge.tool`.
-	The list below shows the valid built-in values.
-	Any other value is treated as a custom diff tool and requires
-	that a corresponding difftool.<tool>.cmd variable is defined.
-
-diff.guitool::
-	Controls which diff tool is used by linkgit:git-difftool[1] when
-	the -g/--gui flag is specified. This variable overrides the value
-	configured in `merge.guitool`. The list below shows the valid
-	built-in values. Any other value is treated as a custom diff tool
-	and requires that a corresponding difftool.<guitool>.cmd variable
-	is defined.
-
 include::../mergetools-diff.txt[]
 
 diff.indentHeuristic::
diff --git a/Documentation/config/difftool.txt b/Documentation/config/difftool.txt
index 6762594480..a3f8211210 100644
--- a/Documentation/config/difftool.txt
+++ b/Documentation/config/difftool.txt
@@ -1,6 +1,17 @@
-difftool.<tool>.path::
-	Override the path for the given tool.  This is useful in case
-	your tool is not in the PATH.
+diff.tool::
+	Controls which diff tool is used by linkgit:git-difftool[1].
+	This variable overrides the value configured in `merge.tool`.
+	The list below shows the valid built-in values.
+	Any other value is treated as a custom diff tool and requires
+	that a corresponding difftool.<tool>.cmd variable is defined.
+
+diff.guitool::
+	Controls which diff tool is used by linkgit:git-difftool[1] when
+	the -g/--gui flag is specified. This variable overrides the value
+	configured in `merge.guitool`. The list below shows the valid
+	built-in values. Any other value is treated as a custom diff tool
+	and requires that a corresponding difftool.<guitool>.cmd variable
+	is defined.
 
 difftool.<tool>.cmd::
 	Specify the command to invoke the specified diff tool.
@@ -9,6 +20,17 @@ difftool.<tool>.cmd::
 	file containing the contents of the diff pre-image and 'REMOTE'
 	is set to the name of the temporary file containing the contents
 	of the diff post-image.
++
+See the `--tool=<tool>` option in linkgit:git-difftool[1] for more details.
+
+difftool.<tool>.path::
+	Override the path for the given tool.  This is useful in case
+	your tool is not in the PATH.
+
+difftool.trustExitCode::
+	Exit difftool if the invoked diff tool returns a non-zero exit status.
++
+See the `--trust-exit-code` option in linkgit:git-difftool[1] for more details.
 
 difftool.prompt::
 	Prompt before each invocation of the diff tool.
diff --git a/Documentation/config/grep.txt b/Documentation/config/grep.txt
index 182edd813a..e521f20390 100644
--- a/Documentation/config/grep.txt
+++ b/Documentation/config/grep.txt
@@ -17,8 +17,11 @@ grep.extendedRegexp::
 	other than 'default'.
 
 grep.threads::
-	Number of grep worker threads to use.
-	See `grep.threads` in linkgit:git-grep[1] for more information.
+	Number of grep worker threads to use. If unset (or set to 0), Git will
+	use as many threads as the number of logical cores available.
+
+grep.fullName::
+	If set to true, enable `--full-name` option by default.
 
 grep.fallbackToNoIndex::
 	If set to true, fall back to git grep --no-index if git grep
diff --git a/Documentation/config/log.txt b/Documentation/config/log.txt
index 5250ba45fb..bc63bc3939 100644
--- a/Documentation/config/log.txt
+++ b/Documentation/config/log.txt
@@ -7,6 +7,10 @@ log.date::
 	Set the default date-time mode for the 'log' command.
 	Setting a value for log.date is similar to using 'git log''s
 	`--date` option.  See linkgit:git-log[1] for details.
++
+If the format is set to "auto:foo" and the pager is in use, format
+"foo" will be the used for the date format. Otherwise "default" will
+be used.
 
 log.decorate::
 	Print out the ref names of any commits that are shown by the log
diff --git a/Documentation/config/notes.txt b/Documentation/config/notes.txt
index aeef56d49a..c7c4811734 100644
--- a/Documentation/config/notes.txt
+++ b/Documentation/config/notes.txt
@@ -3,6 +3,9 @@ notes.mergeStrategy::
 	conflicts.  Must be one of `manual`, `ours`, `theirs`, `union`, or
 	`cat_sort_uniq`.  Defaults to `manual`.  See "NOTES MERGE STRATEGIES"
 	section of linkgit:git-notes[1] for more information on each strategy.
++
+This setting can be overridden by passing the `--strategy` option to
+linkgit:git-notes[1].
 
 notes.<name>.mergeStrategy::
 	Which merge strategy to choose when doing a notes merge into
@@ -11,28 +14,35 @@ notes.<name>.mergeStrategy::
 	linkgit:git-notes[1] for more information on the available strategies.
 
 notes.displayRef::
-	The (fully qualified) refname from which to show notes when
-	showing commit messages.  The value of this variable can be set
-	to a glob, in which case notes from all matching refs will be
-	shown.  You may also specify this configuration variable
-	several times.  A warning will be issued for refs that do not
-	exist, but a glob that does not match any refs is silently
-	ignored.
+	Which ref (or refs, if a glob or specified more than once), in
+	addition to the default set by `core.notesRef` or
+	`GIT_NOTES_REF`, to read notes from when showing commit
+	messages with the 'git log' family of commands.
 +
 This setting can be overridden with the `GIT_NOTES_DISPLAY_REF`
 environment variable, which must be a colon separated list of refs or
 globs.
 +
+A warning will be issued for refs that do not exist,
+but a glob that does not match any refs is silently ignored.
++
+This setting can be disabled by the `--no-notes` option to the 'git
+log' family of commands, or by the `--notes=<ref>` option accepted by
+those commands.
++
 The effective value of "core.notesRef" (possibly overridden by
 GIT_NOTES_REF) is also implicitly added to the list of refs to be
 displayed.
 
 notes.rewrite.<command>::
 	When rewriting commits with <command> (currently `amend` or
-	`rebase`) and this variable is set to `true`, Git
-	automatically copies your notes from the original to the
-	rewritten commit.  Defaults to `true`, but see
-	"notes.rewriteRef" below.
+	`rebase`), if this variable is `false`, git will not copy
+	notes from the original to the rewritten commit.  Defaults to
+	`true`.  See also "`notes.rewriteRef`" below.
++
+This setting can be overridden with the `GIT_NOTES_REWRITE_REF`
+environment variable, which must be a colon separated list of refs or
+globs.
 
 notes.rewriteMode::
 	When copying notes during a rewrite (see the
@@ -46,14 +56,13 @@ environment variable.
 
 notes.rewriteRef::
 	When copying notes during a rewrite, specifies the (fully
-	qualified) ref whose notes should be copied.  The ref may be a
-	glob, in which case notes in all matching refs will be copied.
-	You may also specify this configuration several times.
+	qualified) ref whose notes should be copied.  May be a glob,
+	in which case notes in all matching refs will be copied.  You
+	may also specify this configuration several times.
 +
 Does not have a default value; you must configure this variable to
 enable note rewriting.  Set it to `refs/notes/commits` to enable
 rewriting for the default commit notes.
 +
-This setting can be overridden with the `GIT_NOTES_REWRITE_REF`
-environment variable, which must be a colon separated list of refs or
-globs.
+Can be overridden with the `GIT_NOTES_REWRITE_REF` environment variable.
+See `notes.rewrite.<command>` above for a further description of its format.
diff --git a/Documentation/config/sendemail.txt b/Documentation/config/sendemail.txt
index 50baa5d6bf..51da7088a8 100644
--- a/Documentation/config/sendemail.txt
+++ b/Documentation/config/sendemail.txt
@@ -18,17 +18,49 @@ sendemail.<identity>.*::
 	identity is selected, through either the command-line or
 	`sendemail.identity`.
 
+sendemail.multiEdit::
+	If true (default), a single editor instance will be spawned to edit
+	files you have to edit (patches when `--annotate` is used, and the
+	summary when `--compose` is used). If false, files will be edited one
+	after the other, spawning a new editor each time.
+
+sendemail.confirm::
+	Sets the default for whether to confirm before sending. Must be
+	one of 'always', 'never', 'cc', 'compose', or 'auto'. See `--confirm`
+	in the linkgit:git-send-email[1] documentation for the meaning of these
+	values.
+
 sendemail.aliasesFile::
+	To avoid typing long email addresses, point this to one or more
+	email aliases files.  You must also supply `sendemail.aliasFileType`.
+
 sendemail.aliasFileType::
+	Format of the file(s) specified in sendemail.aliasesFile. Must be
+	one of 'mutt', 'mailrc', 'pine', 'elm', or 'gnus', or 'sendmail'.
++
+What an alias file in each format looks like can be found in
+the documentation of the email program of the same name. The
+differences and limitations from the standard formats are
+described below:
++
+--
+sendmail;;
+*	Quoted aliases and quoted addresses are not supported: lines that
+	contain a `"` symbol are ignored.
+*	Redirection to a file (`/path/name`) or pipe (`|command`) is not
+	supported.
+*	File inclusion (`:include: /path/name`) is not supported.
+*	Warnings are printed on the standard error output for any
+	explicitly unsupported constructs, and any other lines that are not
+	recognized by the parser.
+--
 sendemail.annotate::
 sendemail.bcc::
 sendemail.cc::
 sendemail.ccCmd::
 sendemail.chainReplyTo::
-sendemail.confirm::
 sendemail.envelopeSender::
 sendemail.from::
-sendemail.multiEdit::
 sendemail.signedoffbycc::
 sendemail.smtpPass::
 sendemail.suppresscc::
@@ -44,7 +76,9 @@ sendemail.thread::
 sendemail.transferEncoding::
 sendemail.validate::
 sendemail.xmailer::
-	See linkgit:git-send-email[1] for description.
+	These configuration variables all provide a default for
+	linkgit:git-send-email[1] command-line options. See its
+	documentation for details.
 
 sendemail.signedoffcc (deprecated)::
 	Deprecated alias for `sendemail.signedoffbycc`.