Add bashlet charstream/append.

lib/charstream/append

@@ -0,0 +1,74 @@
+#!/bin/bash
+
+
+################################################################################
+#                                         
+# |              |    |         |         
+# |---.,---.,---.|---.|    ,---.|--- ,---.
+# |   |,---|`---.|   ||    |---'|    `---.
+# `---'`---^`---'`   '`---'`---'`---'`---'
+#
+#                                        
+# Bashlets -- A modular extensible toolbox for Bash
+#
+# Copyright (c) 2014-6 Roberto Reale
+# 
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+# 
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
+################################################################################
+
+
+source bashlet charstream/filter
+source bashlet os/tempfile
+
+#@method
+function bashlets_charstream_append_generic()
+{
+    local filename="$1"
+
+    local tempfile="$(tempfile create)"
+
+    # stream A
+    cat > "$tempfile"
+    # stream B
+    cat "$filename" >> "$tempfile"
+
+    cat "$tempfile"
+
+    tempfile destroy "$tempfile"
+}
+
+#@method
+function bashlets_charstream_append_after_pattern()
+{
+    local filename="$1" ; shift
+    local pattern="$@"
+
+    filter till_pattern "$pattern"  \
+        | bashlets_charstream_append_generic "$filename"
+}
+
+
+# Local variables:
+# mode: shell-script
+# sh-basic-offset: 4
+# sh-indent-comment: t
+# indent-tabs-mode: nil
+# End:
+# ex: ts=4 sw=4 et filetype=sh