Fix handling of XML parser errors

This change makes sure that the build script will stop if an XML parser
error occures, and the faulty build will not be propagated to the web
server. Please note that it requires switching all the shell scripts to
bash.

build/arguments.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 [ -z "$inc_misc" ] && . "$basedir/build/misc.sh"
 

build/build_main.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # Check dependencies
 deperrors=''

build/buildrun.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_buildrun=true
 [ -z "$inc_makerules" ] && . "$basedir/build/makerules.sh"

build/filenames.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_filenames=true
 [ -z "$inc_languages" ] && . "$basedir/build/languages.sh"

build/fundraising.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_fundraising=true
 [ -z "$inc_filenames" ] && . "$basedir/build/filenames.sh"

build/languages.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # lazy-ass include guard
 inc_languages=true

build/logging.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_logging=true
 

build/makerules.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_makerules=true
 [ -z "$inc_misc" ] && . "$basedir/build/misc.sh"

build/misc.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_misc=true
 [ -z "$inc_logging" ] && . "$basedir/build/logging.sh"

build/process_file.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 basedir="${0%/*}/.."
 [ -z "$inc_processor" ] && . "$basedir/build/processor.sh"

build/processor.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_processor=true
 [ -z "$inc_filenames" ] && . "$basedir/build/filenames.sh"
@@ -13,6 +13,10 @@ process_file(){
   lang=$(get_language "$infile")
   [ -z "$processor" ] && processor="$(get_processor "$shortname")"
 
+  # Make sure that the following pipe exits with a nonzero exit code if *any*
+  # of the commands fails.
+  set -o pipefail
+
   build_xmlstream "$shortname" "$lang" "$olang" \
   | xsltproc "$processor" - \
   | sed -r ':X; N; $!bX;

build/scaffold.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_scaffold=true
 [ -z "$inc_xmlfiles" ] && . "$basedir/build/xmlfiles.sh"

build/source_globber.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 basedir="${0%/*}/.."
 [ -z "$inc_sources" ] && . "$basedir/build/sources.sh"

build/sources.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_sources=true
 [ -z "$inc_xmlfiles" ] && . "$basedir/build/xmlfiles.sh"

build/status.html.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 exec 2>/dev/null
 

build/stirrups.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_stirrups=true
 [ -z "$inc_misc" ] && . "$basedir/build/misc.sh"

build/translations.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_translations=true
 [ -z "$inc_filenames" ] && . "$basedir/build/filenames.sh"

build/xmlfiles.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 inc_xmlfiles=true