sanity-check

#!/bin/bash

# Compare project.xml to project.backup.xml for each directory/stack.
# Project files are considered sane, if project.xml and project.backup.xml are non-empty
# and their diff is non-empty.

# ./sanity-check [verbose]
# Verbose option prints the file sizes and diff length for each directory.

# $? equals to 0 if all stacks are sane,
#              1 otherwise.

PROJECT_NAME="project.xml"
BACKUP_NAME="project.backup.xml"
INDENT=""
if [ "$1" = "verbose" ]; then
    INDENT="    "
fi

ANY_NOT_SANE=0


# Scan through directories that look like <lower number>-<upper number>.
# The second wildcard (*) is placed before [0-9] in order to avoid
# scanning directories such as <lower number>-<upper number>.backup.
# Consider using find for the use of better regexp.

for d in `ls | grep ^[0-9][0-9]\*-[0-9][0-9]\*\$ | tr ' ' '\n' | sort -n | tail -n +2`; do
    SANE=1
    if [ "$1" = "verbose" ]; then
        echo "Checking project directory $d for sanity..."
    fi
    # get file sizes
    PROJECT_FILE_SIZE="`stat -c %s $d/$PROJECT_NAME`"
    BACKUP_FILE_SIZE="`stat -c %s $d/$BACKUP_NAME`"
    # get diff length
    DIFF_LINE_COUNT="`diff $d/$PROJECT_NAME $d/$BACKUP_NAME | wc -l`"
    if [ "$1" = "verbose" ]; then
        echo "$INDENT""$PROJECT_NAME file size: $PROJECT_FILE_SIZE"
        echo "$INDENT""$BACKUP_NAME file size: $PROJECT_FILE_SIZE"
        echo "$INDENT""diff contains $DIFF_LINE_COUNT lines"
    fi
    # set sanity to zero (and print errors)
    if [ "$PROJECT_FILE_SIZE" = "0" ]; then
        SANE=0
        if [ "$1" = "verbose" ]; then
            echo "$INDENT""Empty $PROJECT_NAME file in $d"
        fi
    fi
    if [ "$BACKUP_FILE_SIZE" = "0" ]; then
        SANE=0
        if [ "$1" = "verbose" ]; then
            echo "$INDENT""Empty $BACKUP_FILE_NAME file in $d"
        fi
    fi
    if [ "$DIFF_LINE_COUNT" = "0" ]; then
        if [ "$1" = "verbose" ]; then
            echo "$INDENT""Empty diff between $d/$PROJECT_NAME and $d/$BACKUP_NAME"
        fi
        SANE=0
    fi;
    if [ "$SANE" = "0" ]; then
        ANY_NOT_SANE=1
        echo "$d";
    fi

done

# exit with 1 if not all project files were sane
exit $ANY_NOT_SANE