install-doc-quick: allow specifying what ref to install

We allow the builders, who want to install the preformatted manpages
and html documents, to specify where in their filesystem these two
repositories are stored.  Let them also specify which ref (or even a
revision) to grab the preformatted material from.
Signed-off-by: NRandall S. Becker <rsbecker@nexbridge.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/Makefile

@@ -39,6 +39,7 @@ MAN7_TXT += gitworkflows.txt
 MAN_TXT = $(MAN1_TXT) $(MAN5_TXT) $(MAN7_TXT)
 MAN_XML = $(patsubst %.txt,%.xml,$(MAN_TXT))
 MAN_HTML = $(patsubst %.txt,%.html,$(MAN_TXT))
+GIT_MAN_REF = master
 
 OBSOLETE_HTML += everyday.html
 OBSOLETE_HTML += git-remote-helpers.html
@@ -437,14 +438,14 @@ require-manrepo::
 	then echo "git-manpages repository must exist at $(MAN_REPO)"; exit 1; fi
 
 quick-install-man: require-manrepo
-	'$(SHELL_PATH_SQ)' ./install-doc-quick.sh $(MAN_REPO) $(DESTDIR)$(mandir)
+	'$(SHELL_PATH_SQ)' ./install-doc-quick.sh $(MAN_REPO) $(DESTDIR)$(mandir) $(GIT_MAN_REF)
 
 require-htmlrepo::
 	@if test ! -d $(HTML_REPO); \
 	then echo "git-htmldocs repository must exist at $(HTML_REPO)"; exit 1; fi
 
 quick-install-html: require-htmlrepo
-	'$(SHELL_PATH_SQ)' ./install-doc-quick.sh $(HTML_REPO) $(DESTDIR)$(htmldir)
+	'$(SHELL_PATH_SQ)' ./install-doc-quick.sh $(HTML_REPO) $(DESTDIR)$(htmldir) $(GIT_MAN_REF)
 
 print-man1:
 	@for i in $(MAN1_TXT); do echo $$i; done

Documentation/install-doc-quick.sh

@@ -3,11 +3,12 @@
 
 repository=${1?repository}
 destdir=${2?destination}
+GIT_MAN_REF=${3?master}
 
-head=master GIT_DIR=
+GIT_DIR=
 for d in "$repository/.git" "$repository"
 do
-	if GIT_DIR="$d" git rev-parse refs/heads/master >/dev/null 2>&1
+	if GIT_DIR="$d" git rev-parse "$GIT_MAN_REF" >/dev/null 2>&1
 	then
 		GIT_DIR="$d"
 		export GIT_DIR
@@ -27,12 +28,12 @@ export GIT_INDEX_FILE GIT_WORK_TREE
 rm -f "$GIT_INDEX_FILE"
 trap 'rm -f "$GIT_INDEX_FILE"' 0
 
-git read-tree $head
+git read-tree "$GIT_MAN_REF"
 git checkout-index -a -f --prefix="$destdir"/
 
 if test -n "$GZ"
 then
-	git ls-tree -r --name-only $head |
+	git ls-tree -r --name-only "$GIT_MAN_REF" |
 	xargs printf "$destdir/%s\n" |
 	xargs gzip -f
 fi