untested. but this should work quite nicely

_docs/PKGBUILD.templates.d/vcs/00.header

@@ -0,0 +1,2 @@
+# Maintainer: %%MAINTNAME%%
+validpgpkeys=('%%GPGKEY%%')

_docs/PKGBUILD.templates.d/vcs/01.moreinfo

@@ -0,0 +1,2 @@
+# Bug reports can be filed at https://bugs.square-r00t.net/index.php?project=3
+# News updates for packages can be followed at https://devblog.square-r00t.net

_docs/PKGBUILD.templates.d/vcs/02.pkgmeta

@@ -0,0 +1,13 @@
+pkgname=%%PKGNAME%%
+pkgver=0.0000001
+pkgrel=1
+pkgdesc="%%PKGDESC%%"
+arch=('i686' 'x86_64')
+url="%%PKGURL%%"
+license=('%%LICENSE%%')
+depends=('%%PKGDEPS%%')
+optdepends=('%%OPTDEPS%%')
+makedepends=('%%BUILDDEPS%%')
+_pkgname=%%_PKGNAME%%
+provides=("%%_PKGNAME%%")
+conflicts=("%%_PKGNAME%%")

_docs/PKGBUILD.templates.d/vcs/03.sources

@@ -0,0 +1,6 @@
+install=
+changelog=
+noextract=()
+source=("%%SRCURL%%")
+# see https://wiki.archlinux.org/index.php/VCS_package_guidelines#Git_Submodules if you require git submodules
+sha512sums=('SKIP')

_docs/PKGBUILD.templates.d/vcs/04.vcsver.bzr

@@ -0,0 +1,4 @@
+pkgver() {
+  cd "${pkgname}"
+  printf "r%s" "$(bzr revno)"
+}

_docs/PKGBUILD.templates.d/vcs/04.vcsver.git

@@ -0,0 +1,18 @@
+pkgver() {
+  cd "${srcdir}/${_pkgname}"
+  # no tags, so number of revisions e.g. r1142.a17a017
+  printf "r%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)"
+  ## most recent annotated tag e.g. 2.0.r6.ga17a017
+  #git describe --long | sed 's/\([^-]*-g\)/r\1/;s/-/./g'
+  ## most recent un-annotated tag e.g. 0.71.r115.gd95ee07
+  #git describe --long --tags | sed 's/\([^-]*-g\)/r\1/;s/-/./g'
+  ## or:
+  ##git describe --long --tags | sed 's/-/.r/;s/-/./'
+  ## project uses tags with prefix. e.g. v...
+  #git describe --long | sed 's/^foo-//;s/\([^-]*-g\)/r\1/;s/-/./g'
+  ## both with fallback, e.g. 0.9.9.r27.g2b039da with tags, else r1581.2b039da
+  #( set -o pipefail
+  #  git describe --long 2>/dev/null | sed 's/\([^-]*-g\)/r\1/;s/-/./g' ||
+  #  printf "r%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)"
+  #)
+}

_docs/PKGBUILD.templates.d/vcs/04.vcsver.hg

@@ -0,0 +1,4 @@
+pkgver() {
+  cd "${pkgname}"
+  printf "r%s.%s" "$(hg identify -n)" "$(hg identify -i)"
+}

_docs/PKGBUILD.templates.d/vcs/04.vcsver.svn

@@ -0,0 +1,5 @@
+pkgver() {
+  cd "${pkgname}"
+  local ver="$(svnversion)"
+  printf "r%s" "${ver//[[:alpha:]]}"
+}

_docs/PKGBUILD.templates.d/vcs/04.vcsver.unknown

@@ -0,0 +1,4 @@
+pkgver() {
+  cd "$pkgname"
+  printf "r%s" "$(bzr revno)"
+}

_docs/PKGBUILD.templates.d/vcs/05.build

@@ -0,0 +1,4 @@
+build() {
+        cd "${srcdir}/${_pkgname}/src"
+        make prefix=${pkgdir}/usr
+}

_docs/PKGBUILD.templates.d/vcs/06.package

@@ -0,0 +1,4 @@
+package() {
+        install -D -m755 ${srcdir}/${_pkgname}/src/${_pkgname} ${pkgdir}/usr/bin/${_pkgname}
+        install -D -m644 ${srcdir}/${_pkgname}/docs/README.html.en ${pkgdir}/usr/share/doc/${_pkgname}/README.html
+}