Initial commit of support for libinstall resources

The libinstall resources will be used for packaging installation
libraries, such as a basic templating engine or simple shortcut
functions and aliases.

Updated LENS array to allow for an additional 8 byte archive. Also
updated archive index. Now...
1. header
2. libinstall
3. run.sh
4. payload

Added extract_libinstall function.

Along with this, also added the new libtemplate, which provides a very
basic templating engine to be used by the end user run.sh script if
needed.

1 files changed, 13 insertions, 6 deletions

diff --git a/install-header.sh b/install-header.sh
index 766ba0a..a7b9269 100755
--- a/install-header.sh
+++ b/install-header.sh
@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 
-# This is a pre-allocated string of 30 chars of whitespace
+# This is a pre-allocated string of 39 chars of whitespace
 # DO NOT CHANGE THIS without great care - it will break header length
 # calculations
-LENS=(                              )
+LENS=(                                       )
 export SELF       # Absolute path to the installer script (me!)
 export TMP        # Path to tmp install staging directory
 export PAYLOAD    # Path to the extracted payload directory
@@ -23,7 +23,7 @@ extract_chunk_index() {
     skip=$(( skip + LENS[$i] ))
   done
 
-  [ "${dest}" != '-' ] && of="${dest}"
+  [ "${dest}" != '-' ] && of="of=${dest}"
   # Extract the requested chunk index
   dd bs=1 count=${LENS[$index]} iflag=skip_bytes skip=${skip} \
     if=${src} ${of} 2>/dev/null
@@ -33,12 +33,16 @@ extract_header() {
   extract_chunk_index "${SELF}" "${TMP}/header.sh" 0
 }
 
+extract_libinstall() {
+  extract_chunk_index "${SELF}" '-' 1 | xz -d -c | tar -C "${TMP}" -x
+}
+
 extract_runscript() {
-  extract_chunk_index "${SELF}" '-' 1 | xz -d -c > "${TMP}/run.sh"
+  extract_chunk_index "${SELF}" '-' 2 | xz -d -c > "${TMP}/run.sh"
 }
 
 extract_payload() {
-  extract_chunk_index "${SELF}" '-' 2 | xz -d -c | tar -C "${TMP}" -x
+  extract_chunk_index "${SELF}" '-' 3 | xz -d -c | tar -C "${TMP}" -x
   export PAYLOAD="${TMP}/pkg"
 }
 
@@ -48,10 +52,13 @@ main() {
   TMP="$(mktemp -d /tmp/installer-XXXXXXX)"
 
   extract_header
+  extract_libinstall
   extract_runscript
-  #extract_chunks "${self}" "${tmp}"
 
   cd "${TMP}"
+
+  source libinstall/template.sh
+
   source run.sh
 
   # Function 'deploy' is provided by run.sh