Makefile: add quick-install-doc for installing pre-built manpages

This adds and uses the install-doc-quick.sh file to
Documentation/, which is usable for people who track either the
'html' or 'man' heads in Junio's repository (prefixed with
'origin/' if cloned locally).  You may override this by
specifying DOC_REF in the make environment or in config.mak.

GZ may also be set in the environment (or config.mak) if you
wish to gzip the documentation after installing it.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 31 insertions, 0 deletions

diff --git a/Documentation/install-doc-quick.sh b/Documentation/install-doc-quick.sh
new file mode 100755
index 0000000000..a64054948a
--- /dev/null
+++ b/Documentation/install-doc-quick.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+# This requires a branch named in $head
+# (usually 'man' or 'html', provided by the git.git repository)
+set -e
+head="$1"
+mandir="$2"
+SUBDIRECTORY_OK=t
+USAGE='<refname> <target directory>'
+. git-sh-setup
+export GIT_DIR
+
+test -z "$mandir" && usage
+if ! git-rev-parse --verify "$head^0" >/dev/null; then
+	echo >&2 "head: $head does not exist in the current repository"
+	usage
+fi
+
+GIT_INDEX_FILE=`pwd`/.quick-doc.index
+export GIT_INDEX_FILE
+rm -f "$GIT_INDEX_FILE"
+git-read-tree $head
+git-checkout-index -a -f --prefix="$mandir"/
+
+if test -n "$GZ"; then
+	cd "$mandir"
+	for i in `git-ls-tree -r --name-only $head`
+	do
+		gzip < $i > $i.gz && rm $i
+	done
+fi
+rm -f "$GIT_INDEX_FILE"