start working on supporting different versions of consul-template

Signed-off-by: Steven Armstrong <steven@icarus.ethz.ch>

cdist/conf/type/__consul_template/files/versions/0.6.5/cksum

@@ -0,0 +1 @@
+1356006333 8496656 consul-template

cdist/conf/type/__consul_template/files/versions/0.6.5/source

@@ -0,0 +1 @@
+https://github.com/hashicorp/consul-template/releases/download/v0.6.5/consul-template_0.6.5_linux_amd64.tar.gz

cdist/conf/type/__consul_template/man.text

@@ -10,8 +10,11 @@ cdist-type__consul_template - manage the consul-template service
 
 DESCRIPTION
 -----------
-Installs consul-template, generates a global config file and creates directory
-for per template config files.
+Downloads and installs the consul-template binary from
+https://github.com/hashicorp/consul-template/releases/download/.
+Generates a global config file and creates directory for per template config files.
+Note that the consul-template binary is downloaded on the server (the machine running
+cdist) and then deployed to the target host using the __file type.
 
 
 REQUIRED PARAMETERS
@@ -28,14 +31,21 @@ batch-size::
 consul::
    the location of the Consul instance to query (may be an IP address or FQDN) with port.
    Defaults to 'localhost:8500'.
+install-to::
+   where to install the binary. Defaults to /usr/local/bin/consul-template
 max-stale::
    the maximum staleness of a query. If specified, Consul will distribute work among all
    servers instead of just the leader.
 retry::
    the amount of time to wait if Consul returns an error when communicating
    with the API.
+state::
+   either 'present' or 'absent'. Defaults to 'present'
 token::
    the Consul API token.
+version::
+   which version of consul-template to install. See ./files/versions for a list of
+   supported versions. Defaults to the latest known version.
 wait::
    the minimum(:maximum) to wait before rendering a new template to disk and
    triggering a command, separated by a colon (:). If the optional maximum
@@ -57,6 +67,11 @@ EXAMPLES
 __consul_template \
    --consul consul.service.consul:8500 \
    --retry 30s
+
+# specific version
+__consul_template \
+   --version 0.6.5 \
+   --retry 30s
 --------------------------------------------------------------------------------
 
 

cdist/conf/type/__consul_template/manifest

@@ -24,7 +24,10 @@ os=$(cat "$__global/explorer/os")
 case "$os" in
    centos|redhat)
       # whitelist safeguard
-      :
+      service_onchange='service consul-template status >/dev/null && service consul-template reload || true' \
+   ;;
+   archlinux)
+      service_onchange="systemctl status consul-template >/dev/null && systemctl reload consul-template || true"
    ;;
    *)
       echo "Your operating system ($os) is currently not supported by this type (${__type##*/})." >&2
@@ -33,7 +36,30 @@ case "$os" in
    ;;
 esac
 
-state="present"
+versions_dir="$__type/files/versions"
+version="$(cat "$__object/parameter/version")"
+version_dir="$versions_dir/$version"
+
+if [ ! -d "$version_dir" ]; then
+   echo "Unknown consul-template version '$version'. Expected one of:" >&2
+   ls "$versions_dir" >&2
+   exit 1
+fi
+
+state="$(cat "$__object/parameter/state")"
+install_to="$(cat "$__object/parameter/install-to")"
+
+__staged_file "$install_to" \
+   --source "$(cat "$version_dir/source")" \
+   --cksum "$(cat "$version_dir/cksum")" \
+   --fetch-command 'curl -s -L "%s"' \
+   --prepare-command 'tar -xzf "%s"; cat consul-template_*/consul-template' \
+   --state "$state" \
+   --group root \
+   --owner root \
+   --mode 755
+
+
 conf_dir="/etc/consul-template/conf.d"
 conf_file="config.hcl"
 template_dir="/etc/consul-template/template"
@@ -48,17 +74,6 @@ require="__directory/etc/consul-template" \
       --owner root --group root --mode 750
 
 
-__staged_file /usr/local/bin/consul-template \
-   --source https://github.com/hashicorp/consul-template/releases/download/v0.6.5/consul-template_0.6.5_linux_amd64.tar.gz \
-   --cksum '1356006333 8496656 consul-template' \
-   --fetch-command 'curl -s -L "%s"' \
-   --prepare-command 'tar -xzf "%s"; cat consul-template_*/consul-template' \
-   --state present \
-   --group root \
-   --owner root \
-   --mode 755
-
-
 # Generate hcl config file
 (
 for param in $(ls "$__object/parameter/"); do
@@ -82,7 +97,7 @@ require="__directory${conf_dir}" \
    __config_file "${conf_dir}/${conf_file}" \
       --owner root --group root --mode 640 \
       --state "$state" \
-      --onchange 'service consul-template status >/dev/null && service consul-template reload || true' \
+      --onchange "$service_onchange" \
       --source -
 
 
@@ -118,4 +133,12 @@ case "$os" in
       export require="__file/etc/init/${service}.conf"
       __start_on_boot "$service" --state "$state"
    ;;
+   archlinux)
+      __file "/lib/systemd/system/${service}.service" \
+         --owner root --group root --mode 0555 \
+         --state "$state" \
+         --source "$__type/files/${service}.systemd"
+      export require="__file/lib/systemd/system/${service}.service"
+      __start_on_boot "$service" --state "$state"
+   ;;
 esac

cdist/conf/type/__consul_template/parameter/default/install-to

@@ -0,0 +1 @@
+/usr/local/bin/consul-template

cdist/conf/type/__consul_template/parameter/default/state

@@ -0,0 +1 @@
+present

cdist/conf/type/__consul_template/parameter/default/version

@@ -0,0 +1 @@
+0.6.5

cdist/conf/type/__consul_template/parameter/optional

@@ -1,7 +1,10 @@
 auth
 batch-size
 consul
+install-to
 max-stale
 retry
+state
 token
+version
 wait

cdist/conf/type/__consul_template/todo

@@ -0,0 +1,3 @@
+- add support for --install-to in init-system files/templates
+- add support for latest version 0.7.0
+   - config file format has changed