X-Git-Url: https://feistymeow.org/gitweb/?a=blobdiff_plain;f=scripts%2Fcore%2Ffunctions.sh;h=dee26d6b4fae1a78dcb624508f631b1653960041;hb=f9cdfb4f177d9ab6cb7ce02ef57964d5d019eeb6;hp=f82e30c76036bee99d8d659492a3e6bd73aa4a07;hpb=fd4011da27a9ed30fc085a71bd3eea0c5e5841ea;p=feisty_meow.git

diff --git a/scripts/core/functions.sh b/scripts/core/functions.sh
index f82e30c7..dee26d6b 100644
--- a/scripts/core/functions.sh
+++ b/scripts/core/functions.sh
@@ -855,6 +855,69 @@ return 0
 
   ##############
 
+  # given a filename and a string to seek and a number of lines, then this
+  # function will remove the first occurrence of a line in the file that
+  # matches the string, and it will also axe the next N lines as specified.
+  function create_chomped_copy_of_file()
+  {
+    local filename="$1"; shift
+    local seeker="$1"; shift
+    local numlines=$1; shift
+
+#echo into create_chomped_copy...
+#var filename seeker numlines 
+
+    # make a backup first, oy.
+    \cp -f "$filename" "$filename.bkup-${RANDOM}" 
+    test_or_die "backing up file: $filename"
+
+    # make a temp file to write to before we move file into place in bind.
+    local new_version="/tmp/$(basename ${filename}).bkup-${RANDOM}" 
+    \rm -f "$new_version"
+    test_or_die "cleaning out new version of file from: $new_version"
+
+    local line
+    local skip_count=0
+    local found_any=
+    while read line; do
+      # don't bother looking at the lines if we're already in skip mode.
+      if [[ $skip_count == 0 ]]; then
+        # find the string they're seeking.
+        if [[ ! "$line" =~ .*${seeker}.* ]]; then
+          # no match.
+          echo "$line" >> "$new_version"
+        else
+          # a match!  start skipping.  we will delete this line and the next N lines.
+          ((skip_count++))
+#echo first skip count is now $skip_count
+          found_any=yes
+        fi
+      else
+        # we're already skipping.  let's keep going until we hit the limit.
+        ((skip_count++))
+#echo ongoing skip count is now $skip_count
+        if (( $skip_count > $numlines )); then
+          echo "Done skipping, and back to writing output file."
+          skip_count=0
+        fi
+      fi
+    done < "$filename"
+
+#echo file we created looks like this:
+#cat "$new_version"
+
+    if [ ! -z "$found_any" ]; then
+      # put the file back into place under the original name.
+      \mv "$new_version" "$filename"
+      test_or_die "moving the new version into place in: $filename"
+    else
+      # cannot always be considered an error, but we can at least gripe.
+      echo "Did not find any matches for seeker '$seeker' in file: $filename"
+    fi
+  }
+
+  ##############
+
   # NOTE: no more function definitions are allowed after this point.
 
   function function_sentinel()