2006-09-30 [wwp] 2.5.2cvs23

[claws.git] / tools / fix_date.sh

diff --git a/tools/fix_date.sh b/tools/fix_date.sh
index 3611d6723d4e7be4ef58edf90324d0d924ea455b..08997ccbd65bf23f39c10bc30b103766f25c9eee 100644 (file)
--- a/tools/fix_date.sh
+++ b/tools/fix_date.sh
@@ -7,9 +7,7 @@
 # If no X-Original-Date already exist, the former Date value will be set
 # in such field.
 
-# TODO: add a switch to replace only non RFC-compliant Date: headers
-
-VERSION="0.0.3"
+VERSION="0.0.4"
 
 
 function version()
@@ -25,19 +23,36 @@ function usage()
        echo "switches:"
        echo "  --help     display this help then exit"
        echo "  --version  display version information then exit"
-       echo "  --force    force writting of Date: header even if it already exists"
+       echo "  --force    always force (re-)writing of Date: header"
+       echo "  --rfc      force re-writing of Date: header when it's not RFC-compliant"
        echo "  --debug    turn on debug information (be more verbose)"
+       echo "  --strict   use RFC-strict matching patterns for dates"
        echo "  --         end of switches (in case a filename starts with a -)"
        exit $1
 }
 
+function date_valid()
+{
+       test $STRICT -eq 1 && \
+               REGEXP="$DATE_REGEXP_STRICT" || \
+               REGEXP="$DATE_REGEXP"
+               
+       echo "$1" | grep -qEim 1 "$REGEXP"
+       DATE_VALID=$?
+}
 
-# use --force to always write the Date header
-# otherwise, the Date header will be written if only it doesn't already
-# exist
+# use --force to always (re-)write the Date header
+# otherwise, the Date header will be written if only it doesn't exist
 FORCE=0
+# use --rfc to (re-)write the Date header when it's not RFC-compliant
+# otherwise, the Date header will be written if only it doesn't exist
+RFC=0
 # use --debug to display more information about what's performed
 DEBUG=0
+# use --strict to use strict matching patterns for date validation
+STRICT=0
+# 0 = valid, always valid until --strict is used, then date_valid overrides this value
+DATE_VALID=0
 
 while [ -n "$1" ]
 do
@@ -46,6 +61,8 @@ do
        --version)      version;;
        --force)        FORCE=1;;
        --debug)        DEBUG=1;;
+       --rfc)          RFC=1;;
+       --strict)       STRICT=1;;
        --)                     shift
                                break;;
        -*)                     echo "error: unrecognized switch '$1'"
@@ -55,11 +72,20 @@ do
        shift
 done
 
+if [ $FORCE -eq 1 -a $RFC -eq 1 ]
+then
+       echo "error: use either --force or --rfc, but not both at the same time"
+       usage 1
+fi
+
 test $# -lt 1 && \
        usage 1
 
 TMP="/tmp/${0##*/}.tmp"
 
+DATE_REGEXP="( (Mon|Tue|Wed|Thu|Fri|Sat|Sun),)? [0-9]+ (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dev) [0-9]+ [0-9]+:[0-9]+:[0-9}+ [-+][0-9]+"
+DATE_REGEXP_STRICT="(Mon|Tue|Wed|Thu|Fri|Sat|Sun), [0-9]+ (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dev) [0-9]+ [0-9]+:[0-9]+:[0-9}+ [-+][0-9]+"
+
 while [ -n "$1" ]
 do
        # skip if file is empty or doesn't exist
@@ -69,11 +95,11 @@ do
                continue
        fi
 
-       X_ORIGINAL_DATE=$(grep -Eim 1 '^X-Original-Date: ' "$1" | cut -d ':' -f 2)
-       DATE=$(grep -Eim 1 '^Date: ' "$1" | cut -d ':' -f 2)
-       RECEIVED_DATE=$(grep -Eim 1 ';( (Mon|Tue|Wed|Thu|Fri|Sat|Sun),)? [0-9]+ (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dev) [0-9]+ [0-9]+:[0-9]+:[0-9}+ [-+][0-9]+' "$1" | cut -d ';' -f 2)
-# strict, day of week needed
-#      RECEIVED_DATE=$(grep -Eim 1 '; (Mon|Tue|Wed|Thu|Fri|Sat|Sun), [0-9]+ (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dev) [0-9]+ [0-9]+:[0-9]+:[0-9}+ [-+][0-9]+' "$1" | cut -d ';' -f 2)
+       X_ORIGINAL_DATE=$(grep -Eim 1 '^X-Original-Date: ' "$1" | cut -d ':' -f 2-)
+       DATE=$(grep -Eim 1 '^Date: ' "$1" | cut -d ':' -f 2-)
+       test $STRICT -eq 1 && \
+               RECEIVED_DATE=$(grep -Eim 1 ";$DATE_REGEXP" "$1" | cut -d ';' -f 2) || \
+               RECEIVED_DATE=$(grep -Eim 1 "; $DATE_REGEXP_STRICT" "$1" | cut -d ';' -f 2)
        FILE_DATE=$(ls -l --time-style="+%a, %d %b %Y %X %z" "$1" | tr -s ' ' ' ' | cut -d ' ' -f 6-11)
        # we could also use the system date as a possible replacement
        #SYSTEM_DATE="$(date -R)"
@@ -106,6 +132,8 @@ do
        fi
 
        # replace/set the date and write all lines
+       test $RFC -eq 1 && \
+               date_valid "$DATE"
        if [ -z "$DATE" ]
        then
                test $DEBUG -eq 1 && \
@@ -119,9 +147,23 @@ do
                                echo "$1: date already found, replacing with $REPLACEMENT"
                        sed "s/^Date: .*/Date:$REPLACEMENT_DATE/" "$1" >> "$TMP"
                else
-                       test $DEBUG -eq 1 && \
-                               echo "$1: date already found, skipping"
-                       cat "$1" >> "$TMP"
+                       if [ $RFC -eq 1 ]
+                       then
+                               if [ $DATE_VALID -ne 0 ]
+                               then
+                                       test $DEBUG -eq 1 && \
+                                               echo "$1: date already found but not RFC-compliant, replacing with $REPLACEMENT"
+                                       sed "s/^Date: .*/Date:$REPLACEMENT_DATE/" "$1" >> "$TMP"
+                               else
+                                       test $DEBUG -eq 1 && \
+                                               echo "$1: date already found and RFC-compliant, skipping"
+                                       cat "$1" >> "$TMP"
+                               fi
+                       else
+                               test $DEBUG -eq 1 && \
+                                       echo "$1: date already found, skipping"
+                               cat "$1" >> "$TMP"
+                       fi
                fi
        fi