New script localgit-update-file-timestamps.

1 files changed, 84 insertions, 0 deletions

diff --git a/localgit-update-file-timestamps b/localgit-update-file-timestamps
new file mode 100755
index 0000000..53a42df
--- /dev/null
+++ b/localgit-update-file-timestamps
@@ -0,0 +1,84 @@
+#!/bin/bash -e
+####
+# Helper script to update the Last modified timestamp of files in a Git SCM
+# Projects working Copy
+#
+# When you clone a Git repository, it sets the timestamp of all the files to the
+# time when you cloned the repository.
+#
+# This becomes a problem when you want the cloned repository, which is part of a 
+# Web application have a proper cacheing mechanism so that it can re-cache files
+# (into a webtree) that have been modified since the last cache.
+#
+# @see http://stackoverflow.com/questions/1964470/whats-the-equivalent-of-use-commit-times-for-git
+#
+# Author: Jeffery Fernandez <jeffery@fernandez.net.au>
+####
+#
+# Original source: http://www.jefferyfernandez.id.au/2011/07/30/update-timestamp-of-files-in-checked-out-git-repository/
+
+# Make sure we are not running this on a bare Repository
+REPO_TYPE=`git config --list|egrep ^core.bare | awk -F '=' '{ print $2 }'`
+if [ "$REPO_TYPE" == "true" ]
+then
+echo "Cannot run this script on a bare Repository" && exit 1
+fi
+
+echo "Updating Git Repository Last Modified Time-stamp"
+
+# Obtain the Operating System
+OS=${OS:-`uname`}
+
+# Get the last revision hash of a particular file in the git repository
+getFileLastRevision() 
+{
+git rev-list HEAD "$1" | head -n 1
+}
+
+# Extract the actual last modified timestamp of the file and Update the time-stamp
+updateFileTimeStamp() 
+{
+# Extract the file revision
+FILE_REVISION_HASH=`getFileLastRevision "$1"`
+
+# Get the File last modified time
+FILE_MODIFIED_TIME=`git show --pretty=format:%ai --abbrev-commit ${FILE_REVISION_HASH} | head -n 1`
+
+# Extract the last modified timestamp, differently for Linux, FreeBSD and Mac OS X
+if [ "$OS" = 'Linux' ]
+then
+# for displaying the date in readable format
+#FORMATTED_TIMESTAMP=`date --date="${FILE_MODIFIED_TIME}" +'%d-%m-%Y %H:%M:%S %z'`
+#echo "Modified: ${FILE_MODIFIED_TIME} | ${FORMATTED_TIMESTAMP} > ${1}"
+
+# Modify the last modified timestamp
+touch -d "${FILE_MODIFIED_TIME}" $2
+
+elif [ "$OS" = 'Darwin' ] || [ "$OS" = 'FreeBSD' ]
+then
+# Format the date for updating the timestamp
+FORMATTED_TIMESTAMP=`date -j -f '%Y-%m-%d %H:%M:%S %z' "${FILE_MODIFIED_TIME}" +'%Y%m%d%H%M.%S'`
+#echo "Modified: ${FILE_MODIFIED_TIME} | ${FORMATTED_TIMESTAMP} > ${1}"
+
+# Modify the last modified timestamp
+touch -t  "${FORMATTED_TIMESTAMP}" $2
+else
+echo "Unknown Operating System to perform timestamp update" >&2
+exit 1
+fi
+}
+
+# Backup and update the "Internal Field Separator" to a newline. This is so that
+# we can deal with spaces in file names in the for loop below
+IFS_BAK=$IFS
+IFS="
+"
+# Loop through and fix timestamps on all files in our checked-out repository
+for file in $(git ls-files)
+do
+updateFileTimeStamp "${file}" "${file}"
+done
+
+# Revert the default delimiter
+IFS=$IFS_BAK
+IFS_BAK=