diff --git a/Makefile b/Makefile
index 0b0ff9f..9a30be0 100755
--- a/Makefile
+++ b/Makefile
@@ -63,21 +63,21 @@ $(DISTFILE): version.sh
 	mock -r epel-$(RHEL_VERSION)-noarch ./dist/$(SRPM) --resultdir ./dist/ --define "version $(VERSION)" --define "release $(RELEASE)"
 
 uninstall:
-	rm -f $(PREFIX)/usr/bin/taggit
-	rm -f $(PREFIX)/usr/bin/taghg
-	rm -f $(PREFIX)/usr/bin/gitversion
-	rm -f $(PREFIX)/usr/bin/hgversion
+	rm -f $(PREFIX)/usr/bin/taggit.sh
+	rm -f $(PREFIX)/usr/bin/taghg.sh
+	rm -f $(PREFIX)/usr/bin/gitversion.sh
+	rm -f $(PREFIX)/usr/bin/hgversion.sh
 
 
 install:
 	mkdir -p $(PREFIX)/usr/bin
-	install ./gitversion $(PREFIX)/usr/bin/gitversion
-	install ./hgversion $(PREFIX)/usr/bin/hgversion
-	install ./taggit $(PREFIX)/usr/bin/taggit
-	install ./taghg $(PREFIX)/usr/bin/taghg
+	install ./gitversion $(PREFIX)/usr/bin/gitversion.sh
+	install ./hgversion $(PREFIX)/usr/bin/hgversion.sh
+	install ./taggit $(PREFIX)/usr/bin/taggit.sh
+	install ./taghg $(PREFIX)/usr/bin/taghg.sh
 
 MANIFEST:
-	echo /usr/bin/gitversion > MANIFEST
-	echo /usr/bin/hgversion >> MANIFEST
-	echo /usr/bin/taggit >> MANIFEST
-	echo /usr/bin/taghg >> MANIFEST
+	echo /usr/bin/gitversion.sh > MANIFEST
+	echo /usr/bin/hgversion.sh >> MANIFEST
+	echo /usr/bin/taggit.sh >> MANIFEST
+	echo /usr/bin/taghg.sh >> MANIFEST
diff --git a/gitversion.sh b/gitversion.sh
new file mode 100644
index 0000000..a1ae890
--- /dev/null
+++ b/gitversion.sh
@@ -0,0 +1,78 @@
+#!/bin/bash
+
+LOGSPEC='%ci %an <%aE>%n%n    %s%n    [%h]%d%n'
+VERSIONERS_SEPARATOR=${VERSIONERS_SEPARATOR:-,}
+
+BRANCH=$2
+if [ "${BRANCH}" == "" ]; then
+    BRANCH=$(git branch | grep '^\*\s*.*' | cut -d ' ' -f 2-)
+fi
+
+REBUILDING=0
+SHA1=$(git rev-parse HEAD)
+TAG=$(git describe --tags --abbrev=0 `git rev-list --tags --max-count=1 HEAD` 2>/dev/null)
+BUILD=0
+TAGSHA=$(git rev-list $TAG | head -n 1)
+CHANGELOG="$(git log --format="format:$LOGSPEC" ${TAGSHA}..HEAD)"
+if [ "$TAG" == "" ]; then
+    BUILD=0
+    REBUILDING=1
+    MAJOR=$BRANCH
+else
+    MAJOR=$(echo $TAG | cut -d ${VERSIONERS_SEPARATOR} -f 2)
+    BUILD=$(echo $TAG | cut -d ${VERSIONERS_SEPARATOR} -f 3)
+    if [ "$TAGSHA" != "$SHA1" ]; then
+        CHANGELOG="$(git log --format="format:$LOGSPEC" $TAGSHA..$SHA1)"
+        BUILD=$(expr $BUILD + 1)
+        REBUILDING=1
+    else
+        SHA1=$TAGSHA
+    fi
+fi
+
+OS_NAME=""
+OS_VERSION=""
+if [ "$OS_NAME" == "" ] && [ "$(uname)" == "Darwin" ]; then
+    OS_NAME="osx"
+elif [ "$OS_NAME" == "" ] && [ -f /etc/redhat-release ]; then
+    OS_NAME="el"
+elif [ "$OS_NAME" == "" ] && [ "$(uname | grep -i '^MINGW')" != "" ] || [ "$(uname | grep -i '^CYGWIN')" != "" ]; then
+    OS_NAME="win"
+fi
+
+if [ "$OS_VERSION" == "" ] && [ "$OS_NAME" == "el" ]; then
+    OS_VERSION=$(cat /etc/redhat-release | grep -o "release [0-9]" | cut -d " " -f 2)
+    RHEL_VERSION=$OS_VERSION
+elif [ "$OS_VERSION" == "" ] && [ "$OS_NAME" == "osx" ]; then
+    OS_VERSION="$(sw_vers | grep 'ProductVersion:' | grep -o '[0-9]*\.[0-9]*\.[0-9]*')"
+elif [ "$OS_VERSION" == "" ] && [ "$OS_NAME" == "win" ]; then
+    echo "OS_VERSION unsupported on Microsoft Windows." >&2
+fi
+
+if [ "$ARCH" == "" ]; then
+    if [ "$OS_NAME" == "osx" ]; then
+        ARCH=$(uname -m)
+    elif [ "$OS_NAME" != "win" ]; then
+        ARCH=$(uname -i)
+    elif [ "$OS_NAME" == "win" ]; then
+        ARCH=$(uname -m)
+    fi
+fi
+
+SOURCE=$((git remote show origin 2>/dev/null | grep "Fetch URL" | cut -d : -f 2- | cut -d ' ' -f 2-) || echo '')
+
+echo "TAG=\"${TAG}\""
+echo "BRANCH=\"${BRANCH}\""
+echo "MAJOR=\"${MAJOR}\""
+echo "BUILD=\"${BUILD}\""
+echo "SHA1=\"${SHA1}\""
+echo "OS_NAME=\"\${OS_NAME:-$OS_NAME}\""
+echo "OS_VERSION=\"\${OS_VERSION:-$OS_VERSION}\""
+echo "ARCH=\"\${ARCH:-$ARCH}\""
+echo "VERSION=\"${MAJOR}-${BUILD}\""
+echo "BUILDHOST=\"$(hostname)\""
+echo "BUILDUSER=\"$(whoami)\""
+echo "BUILDDIR=\"$(pwd)\""
+echo "SOURCE=\"${SOURCE}\""
+echo "REBUILDING=$REBUILDING"
+echo "CHANGELOG=\"$CHANGELOG\""
diff --git a/hgversion.sh b/hgversion.sh
new file mode 100644
index 0000000..739447e
--- /dev/null
+++ b/hgversion.sh
@@ -0,0 +1,77 @@
+#!/bin/bash
+
+BRANCH=$2
+if [ "${BRANCH}" == "" ]; then
+    BRANCH=$(hg identify -b)
+fi
+
+REBUILDING=0
+SHA1=$(hg identify -i | grep -Eo "[a-zA-Z0-9]+")
+TAG=$(hg parents --template '{latesttag}')
+TAGSHA=$(hg identify -r $TAG | cut -d ' ' -f 1)
+BUILD=0
+CHANGELOG="$(hg log --branch $BRANCH -X .hgtags --style=changelog -r ${TAG}:${SHA1})"
+if [ "$TAG" == "" ]; then
+    BUILD=0
+    REBUILDING=1
+    MAJOR=$BRANCH
+else
+    MAJOR=$(echo $TAG | cut -d \| -f 2)
+    BUILD=$(echo $TAG | cut -d \| -f 3)
+    SHORTTAGSHA=${TAGSHA:0:12}
+    hg log -r tip | grep "Added tag build|${BRANCH}|${BUILD} for changeset ${SHORTTAGSHA}" >/dev/null
+    if [ $? -ne 0 ] && [ "$TAGSHA" != "$SHA1" ]; then
+	CHANGELOG="$(hg log --branch $BRANCH -X .hgtags --style=changelog -r ${SHORTTAGSHA}:${SHA1})"
+	BUILD=$(expr $BUILD + 1)
+	REBUILDING=1
+    else
+	SHA1=$TAGSHA
+    fi
+fi
+
+OS_NAME=""
+OS_VERSION=""
+if [ "$OS_NAME" == "" ] && [ "$(uname)" == "Darwin" ]; then
+    OS_NAME="osx"
+elif [ "$OS_NAME" == "" ] && [ -f /etc/redhat-release ]; then
+    OS_NAME="el"
+elif [ "$OS_NAME" == "" ] && [ "$(uname | grep -i '^MINGW')" != "" ] || [ "$(uname | grep -i '^CYGWIN')" != "" ]; then
+    OS_NAME="win"
+fi
+
+if [ "$OS_VERSION" == "" ] && [ "$OS_NAME" == "el" ]; then
+    OS_VERSION=$(cat /etc/redhat-release | grep -o "release [0-9]" | cut -d " " -f 2)
+    RHEL_VERSION=$OS_VERSION
+elif [ "$OS_VERSION" == "" ] && [ "$OS_NAME" == "osx" ]; then
+    OS_VERSION="$(sw_vers | grep 'ProductVersion:' | grep -o '[0-9]*\.[0-9]*\.[0-9]*')"
+elif [ "$OS_VERSION" == "" ] && [ "$OS_NAME" == "win" ]; then
+    echo "OS_VERSION unsupported on Microsoft Windows." >&2
+fi
+
+if [ "$ARCH" == "" ]; then
+    if [ "$OS_NAME" == "osx" ]; then
+	ARCH=$(uname -m)
+    elif [ "$OS_NAME" != "win" ]; then
+	ARCH=$(uname -i)
+    elif [ "$OS_NAME" == "win" ]; then
+	ARCH=$(uname -m)
+    fi
+fi
+
+SOURCE=$((cat .hg/hgrc 2>/dev/null | grep default | cut -d = -f 2 | sed s/"^ *"//g) || echo '')
+
+echo "TAG=\"${TAG}\""
+echo "BRANCH=\"${BRANCH}\""
+echo "MAJOR=\"${MAJOR}\""
+echo "BUILD=\"${BUILD}\""
+echo "SHA1=\"${SHA1}\""
+echo "OS_NAME=\"\${OS_NAME:-$OS_NAME}\""
+echo "OS_VERSION=\"\${OS_VERSION:-$OS_VERSION}\""
+echo "ARCH=\"\${ARCH:-$ARCH}\""
+echo "VERSION=\"${MAJOR}-${BUILD}\""
+echo "BUILDHOST=\"$(hostname)\""
+echo "BUILDUSER=\"$(whoami)\""
+echo "BUILDDIR=\"$(pwd)\""
+echo "SOURCE=\"${SOURCE}\""
+echo "REBUILDING=$REBUILDING"
+echo "CHANGELOG=\"$CHANGELOG\""
diff --git a/taggit.sh b/taggit.sh
new file mode 100644
index 0000000..c1d8adc
--- /dev/null
+++ b/taggit.sh
@@ -0,0 +1,34 @@
+#!/bin/bash
+
+SEP=${VERSIONERS_SEPARATOR:-,}
+VERSIONERS_TAGBASE=${VERSIONERS_TAGBASE:-build}
+
+if [ "$MAKETAG" == "false" ]; then
+    exit 0
+fi
+
+if [ ! -f version ]; then
+    $(dirname $BASH_SOURCE)/genversion > version
+fi
+
+. ~/.buildtoolsrc
+. version
+
+WHOLETAG="${VERSIONERS_TAGBASE}${SEP}${MAJOR}${SEP}${BUILD}"
+
+git fetch --tags
+
+TAGSHA1=$(git rev-list $TAG | head -n 1)
+if [ $REBUILDING -eq 0 ]; then
+    echo "This is a rebuild of a previous tag, not tagging or pushing" >&2
+elif [ "$(git tag | grep $WHOLETAG)" != "" ] && [ "$TAGSHA1" != "" ] && [ "$TAGSHA1" != "$SHA1" ]; then
+    echo "Someone else tagged my buildnumber (${WHOLETAG}) onto $TAGSHA1, while I built it from $SHA1 ... "'Help!' >&2
+    exit 1
+elif [ "$TAGSHA1" != "" ] && [ "$TAGSHA1" == "$SHA1" ]; then
+    echo "Someone else built this version at the same time I did, and we both tagged the same SHA1 with the same build tag. Not pushing my tag."
+else
+    git tag -f -a "${WHOLETAG}" -m "Tagging for ${MAJOR}-${BUILD}" $SHA1
+    if [ "$PUSHTAG" != "false" ]; then
+        git push --tags
+    fi
+fi
diff --git a/taghg.sh b/taghg.sh
new file mode 100644
index 0000000..eb81b24
--- /dev/null
+++ b/taghg.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+if [ "$MAKETAG" == "false" ]; then
+    exit 0
+fi
+
+if [ ! -f version ]; then
+    ${dirname $BASH_SOURCE)/genversion > version
+fi
+
+. ~/.buildtoolsrc
+. version
+hg pull -u --branch $(hg branch)
+
+TAGSHA1=$(cat .hgtags | grep "build,${MAJOR},${BUILD}" | cut -d " " -f 1)
+echo "$TAGSHA1" | grep "^$SHA1" >/dev/null 2>&1
+SHORTSHAMATCH=$?
+if [ $REBUILDING -eq 0 ]; then
+    echo "This is a rebuild of a previous tag, not tagging or pushing" >&2
+elif [ "$TAGSHA1" != "" ] && [ $SHORTSHAMATCH -ne 0 ]; then
+    echo "Someone else tagged my buildnumber (branch|${MAJOR}|${BUILD}) onto $TAGSHA1, while I built it from $SHA1 ... "'Help!' >&2
+    exit 1
+elif [ "$TAGSHA1" != "" ] && [ $SHORTSHAMATCH -eq 0 ]; then
+    echo "Someone else built this version at the same time I did, and we both tagged the same SHA1 with the same build tag. Not pushing my tag."
+else
+    hg tag -f -r ${SHA1} "build|${MAJOR}|${BUILD}"
+    if [ "$PUSHTAG" != "false" ]; then
+	hg push
+    fi
+fi