Allow to use different resource caching schemes

On the deployment server we no use
make versioned_jpg="'s/.*/.&.jpg/'" versioned_png="'s/.*/.&.png/'"

to generate resource urls like image.f74d4ea.png

1 files changed, 48 insertions, 3 deletions

diff --git a/xsl/img.xsl b/xsl/img.xsl
index e2a9824..0c10fd2 100644
--- a/xsl/img.xsl
+++ b/xsl/img.xsl
@@ -14,10 +14,55 @@
 
       <!-- ..but modify the src attribute to have a ?git-hash suffix -->
       <xsl:attribute name="src">
-        <xsl:value-of select="@src"/>
-        <xsl:text>?</xsl:text>
-        <xsl:value-of select="$version"/>
+
+        <xsl:variable name="replace_jpg">
+          <xsl:call-template name="replace-string">
+            <xsl:with-param name="text" select="@src"/>
+            <xsl:with-param name="replace" select="'.jpg'" />
+            <xsl:with-param name="with" select="''"/>
+          </xsl:call-template>
+        </xsl:variable>
+
+        <xsl:variable name="replace_jpg_png">
+          <xsl:call-template name="replace-string">
+            <xsl:with-param name="text" select="$replace_jpg"/>
+            <xsl:with-param name="replace" select="'.png'" />
+            <xsl:with-param name="with" select="''"/>
+          </xsl:call-template>
+        </xsl:variable>
+
+        <xsl:value-of select="$replace_jpg_png"/>
+
+        <xsl:choose>
+          <xsl:when test="contains(@src, '.jpg')">
+            <xsl:value-of select="$versioned_jpg"/>
+          </xsl:when>
+          <xsl:when test="contains(@src, '.png')">
+            <xsl:value-of select="$versioned_png"/>
+          </xsl:when>
+        </xsl:choose>
       </xsl:attribute>
     </xsl:copy>
   </xsl:template>
+
+  <xsl:template name="replace-string">
+    <xsl:param name="text"/>
+    <xsl:param name="replace"/>
+    <xsl:param name="with"/>
+    <xsl:choose>
+      <xsl:when test="contains($text,$replace)">
+        <xsl:value-of select="substring-before($text,$replace)"/>
+        <xsl:value-of select="$with"/>
+        <xsl:call-template name="replace-string">
+          <xsl:with-param name="text"
+select="substring-after($text,$replace)"/>
+          <xsl:with-param name="replace" select="$replace"/>
+          <xsl:with-param name="with" select="$with"/>
+        </xsl:call-template>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:value-of select="$text"/>
+      </xsl:otherwise>
+    </xsl:choose>
+  </xsl:template>
 </xsl:stylesheet>