Add reflace & ignore ghostwriter backup files

.gitignore

@@ -0,0 +1 @@
+*.backup

README.md

@@ -57,6 +57,7 @@ Here's a list of the most interesting ones, along with what they do and where th
  - ssh-retry - I forget where it came from, but this command reepeatedly calls ssh until it succeeds in connecting.
  - quote-get - Displays a random quote from a remote file. The quote stays the same until the following day. The remote file is cached locally for convenience :smiley_cat:
  - teleport / telepeek / telepick - A pair of quick functions in my `.bash_aliases` file for quickly jumping about. Works best if you've got a decent amount of free RAM for the cache.
+ - [reflac](https://github.com/chungy/reflac) - Small flac recompression script
 
 ## cloudsurfer.sh
 `cloudsurfer.sh` is a new script I'm writing to bring some of the customisations I store here in this repository to terminals on shared machines - where I can't modify `.bashrc`, for example.

reflac

@@ -0,0 +1,173 @@
+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+
+VERSION=1.5
+
+VERBOSE=0
+RECURSIVE=0
+NOACTION=0
+SYNC=1
+FLAC_LEVEL=5 # Default FLAC compression level
+PRESERVE_MODTIME="" # for -p|--preserve
+
+SELF="$(readlink -f "$0")"
+OPTS=$(getopt -o Vvhrnps012345678 \
+              -l version,verbose,help,recursive,preserve,no-action,no-sync,fast,best \
+              -n reflac -- "$@")
+TMPDIR="$(mktemp --tmpdir -d reflac.XXXXXXXXXX)"
+
+eval set -- "$OPTS"
+
+trap "exit 1" INT
+
+usage()
+{
+    cat <<EOF
+‘reflac’ recompresses FLAC files while maintaining tags and file names.
+
+Usage: reflac [OPTION]... [--] DIRECTORY...
+
+ -h --help       Displays this help text
+ -V --version    Displays the version of this program
+ -v --verbose    Increases the verbosity.  Use once to display the FLACs
+                 currently being processed, use twice for the full ‘flac’
+                 output.
+ -r --recursive  Recurse into directories.
+ -n --no-action  Do not recompress.  With --verbose, displays a list of
+                 files that would be processed.
+ -p --preserve   Preserve file modification time.
+ -s --no-sync    Do not synchronize file data.  Will return faster, with
+                 the potential danger to lose your files in a system crash.
+ -0 --fast       Use the fastest, but worst, compression possible.
+ -1..-7          Adjust FLAC compresion between these standard ranges.
+                 The default is -5, the same as for flac itself.
+ -8 --best       Use the slowest, but best, compression possible.
+
+DIRECTORY should point ‘reflac’ to somewhere that contains *.flac
+files. Optionally terminate the argument list with -- so that any
+possible directory names don’t get misinterpreted as arguments.
+EOF
+    rmdir "$TMPDIR"
+    exit 0
+}
+
+recompress()
+{
+    for flac in *.flac; do
+        if [ $VERBOSE -eq 1 ]; then
+            echo "  $flac"
+        fi
+
+        if [ $NOACTION -eq 0 ]; then
+            HAS_COVER_ART=1
+            metaflac --no-utf8-convert \
+                     --export-tags-to="$TMPDIR/$(basename -s flac -- "$flac")tag" \
+                     -- "$flac"
+            metaflac --export-picture-to="$TMPDIR/$(basename -s flac -- "$flac")img" \
+                     -- "$flac" > /dev/null 2>&1 || HAS_COVER_ART=0 #the error is handled later. do not exit the script
+            if [ $VERBOSE -gt 1 ]; then
+                flac --force-rf64-format --output-prefix="$TMPDIR/" -d -- "$flac"
+                flac --delete-input-file -$FLAC_LEVEL -- \
+                     "$TMPDIR/$(basename -s flac -- "$flac")rf64"
+            else
+                flac -s --force-rf64-format --output-prefix="$TMPDIR/" -d -- "$flac"
+                flac -s --delete-input-file -$FLAC_LEVEL -- \
+                     "$TMPDIR/$(basename -s flac -- "$flac")rf64"
+            fi
+
+            if [ $HAS_COVER_ART -eq 1 ]; then
+                metaflac --no-utf8-convert $PRESERVE_MODTIME \
+                        --import-tags-from="$TMPDIR/$(basename -s flac -- "$flac")tag" \
+                        --import-picture-from="$TMPDIR/$(basename -s flac -- "$flac")img" \
+                        -- "$TMPDIR/$flac"
+            else
+                metaflac --no-utf8-convert $PRESERVE_MODTIME \
+                        --import-tags-from="$TMPDIR/$(basename -s flac -- "$flac")tag" \
+                        -- "$TMPDIR/$flac"
+            fi
+            mv -f -- "$TMPDIR/$flac" "$flac.new"
+            if [ $SYNC -eq 1 ]; then
+                sync "$flac.new"
+                mv -f "$flac.new" "$flac"
+                sync "$flac"
+            else
+                mv -f "$flac.new" "$flac"
+            fi
+            rm -f -- "$TMPDIR/$(basename -s flac -- "$flac")tag" \
+                     "$TMPDIR/$(basename -s flac -- "$flac")img"
+        fi
+    done
+}
+
+while true ; do
+    case "$1" in
+        -v|--verbose)
+            VERBOSE=$((VERBOSE+1))
+            shift ;;
+        -r|--recursive)
+            RECURSIVE=1
+            shift ;;
+        -0|-1|-2|-3|-4|-5|-6|-7|-8)
+            FLAC_LEVEL=${1#-}
+            shift ;;
+        --fast)
+            FLAC_LEVEL=0
+            shift ;;
+        --best)
+            FLAC_LEVEL=8
+            shift ;;
+        -n|--no-action)
+            NOACTION=1
+            shift ;;
+	-p|--preserve)
+	    PRESERVE_MODTIME="--preserve-modtime"
+	    shift ;;
+        -s|--no-sync)
+            SYNC=0
+            shift ;;
+        -V|--version)
+            echo "reflac version $VERSION"
+            rmdir "$TMPDIR"
+            exit 0 ;;
+        -h|--help)
+            usage ;;
+        --) shift; break ;;
+        *) echo "$0: This should never happen!" >&2; exit 1 ;;
+    esac
+done
+
+if [ -z "$*" ]; then
+    usage
+fi
+
+if [ $VERBOSE -eq 0 ] && [ $NOACTION -eq 1 ]; then
+    rmdir "$TMPDIR"
+    exit 0
+fi
+
+for dir do
+    if [ $RECURSIVE -eq 1 ] && [ $NOACTION -eq 1 ]; then
+        find "$(readlink -f -- "$dir")" -type d -execdir "$SELF" -nv {} \;
+    elif [ $RECURSIVE -eq 1 ]; then
+        if [ $VERBOSE -eq 1 ]; then
+            find "$(readlink -f -- "$dir")" -type d \
+                 -execdir "$SELF" -v -"$FLAC_LEVEL" {} \;
+        elif [ $VERBOSE -ge 2 ]; then
+            find "$(readlink -f -- "$dir")" -type d \
+                 -execdir "$SELF" -vv -"$FLAC_LEVEL" {} \;
+        else
+            find "$(readlink -f -- "$dir")" -type d \
+                 -execdir "$SELF" -"$FLAC_LEVEL" {} \;
+        fi
+    else
+        pushd -- "$dir" >/dev/null
+        if [ $VERBOSE -gt 0 ]; then readlink -f .; fi
+        if [ ! -z "$(ls -- *.flac 2>/dev/null)" ]; then
+            recompress
+        fi
+        popd >/dev/null
+    fi
+done
+
+rmdir "$TMPDIR"