add sfdeps

README.org

@@ -6,13 +6,15 @@
   | [[#ffconv][ffconv]] | Convert multiple media files from one format to another |
   | [[#ffcut][ffcut]]  | Extract a part of a media file                          |
 
+  All are created with the [[https://github.com/Deleh/sf][sf]] script framework.
+
 ** Dependencies
 
    - [[https://ffmpeg.org/][FFmpeg]]
 
 ** Installation
 
-   Grab a script and execute it.  
+   Grab a script and execute it.
 
    This repo is also a [[https://nixos.wiki/wiki/Flakes][Nix Flake]].
    You can directly start a script with the following command if you have at least version 2.4 of [[https://nixos.org/][Nix]] installed:
@@ -20,7 +22,7 @@
    : $ nix run github:Deleh/ffutils#<script_name> -- --help
 
 ** Scripts
-   
+
 *** =ffconv=
     :properties:
     :custom_id: ffconv
@@ -52,19 +54,19 @@
          TO_FORMAT    To format
 
        OPTIONS
-         -d, --directory DIRECTORY  Convert files in DIRECTORY (default: current work d
-                                    irectory)
+         -d, --directory DIRECTORY  Convert files in DIRECTORY (default: current work
+                                    directory)
          -k, --keep                 Keep original files
          -l, --list                 List files which match the FROM_FORMAT
-         -m, --move DIRECTORY       Move old files to DIRECTORY (omits --keep) (default
-                                    : )
+         -m, --move DIRECTORY       Move old files to DIRECTORY (omits --keep)
+         -h, --help                 Show this help message and exit
 
        EXAMPLES
          ffconv mp3 opus               Convert all mp3 files to opus
-         ffconv -m trash mp4 mkv       Convert all mp4 to mkv and move the original one
-                                       s to './trash'
-         ffconv -d ~/music -l wma mp3  List all wma files from '~/music' and ask for co
-                                       nverting them to mp3
+         ffconv -m trash mp4 mkv       Convert all mp4 to mkv and move the original
+                                       ones to './trash'
+         ffconv -d ~/music -l wma mp3  List all wma files from '~/music' and ask for
+                                       converting them to mp3
      #+end_example
 
 *** =ffcut=
@@ -79,7 +81,7 @@
       Cutting file video.mp4
       The extracted part was saved to cutted_video.mp4
     #+end_example
-    
+
 **** Usage
 
      #+begin_example
@@ -92,13 +94,14 @@
 
        OPTIONS
          -f, --from TIMESTAMP/SECONDS  Extract from TIMESTAMP/SECONDS (default: 0)
-         -o, --out FILE                Save extracted part to FILE (default: cutted_<fi
-                                       lename>)
+         -o, --out FILE                Save extracted part to FILE (default:
+                                       cutted_<filename>)
          -t, --to TIMESTAMP/DURATION   Extract to TIMESTAMP/DURATION (default: end)
+         -h, --help                    Show this help message and exit
 
        EXAMPLES
-         ffcut -t 5 video.mp4 -o cut.webm         Extract the first five seconds of 'vi
-                                                  deo.mp4' to 'cut.webm'
-         ffcut -f 00:10:30 -t 00:14:15 video.mp4  Extract the part from 00:10:30 to 00:
-                                                  14:15 from 'video.mp4'
+         ffcut -t 5 video.mp4 -o cut.webm         Extract the first five seconds of
+                                                  'video.mp4' to 'cut.webm'
+         ffcut -f 00:10:30 -t 00:14:15 video.mp4  Extract the part from 00:10:30 to
+                                                  00:14:15 from 'video.mp4'
      #+end_example

bin/ffconv

@@ -11,6 +11,7 @@ sfargs+=("move;m;DIRECTORY;;Move old files to DIRECTORY (omits --keep)")
 sfexamples+=("ffconv mp3 opus;Convert all mp3 files to opus")
 sfexamples+=("ffconv -m trash mp4 mkv;Convert all mp4 to mkv and move the original ones to './trash'")
 sfexamples+=("ffconv -d ~/music -l wma mp3;List all wma files from '~/music' and ask for converting them to mp3")
+sfdeps=("ffmpeg")
 
 source "$(dirname $0)/../lib/sf"
 

bin/ffcut

@@ -8,23 +8,23 @@ sfargs+=("out;o;FILE;cutted_<filename>;Save extracted part to FILE")
 sfargs+=("to;t;TIMESTAMP/DURATION;end;Extract to TIMESTAMP/DURATION")
 sfexamples+=("ffcut -t 5 video.mp4 -o cut.webm;Extract the first five seconds of 'video.mp4' to 'cut.webm'")
 sfexamples+=("ffcut -f 00:10:30 -t 00:14:15 video.mp4;Extract the part from 00:10:30 to 00:14:15 from 'video.mp4'")
+sfdeps=("ffmpeg")
 
 source "$(dirname $0)/../lib/sf"
 
 # Handle missing parameters
-[ "$from" == 0 ] && [ "$to" == "end" ] && sferr "Set at least '--from' or '--to'"
+[ "$from" == 0 ] && [ "$to" == "end" ] && sferr "Set at least ${sftbf}--from${sftrs} or ${sftbf}--to${sftrs}"
 
 # Set default value for output file
 [ "$out" == "cutted_<filename>" ] && out="$(dirname "$FILE")/cutted_$(basename "$FILE")"
 
-echo "Cutting file ${sftbf}$(basename "$FILE")${sftrs}"
-
 # Set additional ffmpeg arguments
-ffmpeg_args=()
-[ "$to" != "end" ] && ffmpeg_args+=("-t" "$to")
-[ "${FILE##*.}" == "${out##*.}" ] && ffmpeg_args+=("-c" "copy")
+args=()
+[ "$to" != "end" ] && args+=("-to" "$to")
+[ "${FILE##*.}" == "${out##*.}" ] && args+=("-c" "copy")
 
 # Execute ffmpeg
-ffmpeg -hide_banner -loglevel error -ss "$from" -i "$FILE" -ss "$from" "${ffmpeg_args[@]}" "$out"
+echo "Cutting file ${sftbf}$(basename "$FILE")${sftrs}"
+ffmpeg -hide_banner -loglevel error -i "$FILE" -ss "$from" "${args[@]}" "$out"
 
 [ "$?" == "0" ] && echo "The extracted part was saved to ${sftbf}$out${sftrs}"

lib/sf

@@ -32,17 +32,21 @@ function sfwarn {
 
 # Public input functions
 function sfask {
-    if [ "$2" == "" ]; then
-        read -p "$1? [${sftbf}Y${sftrs}/${sftbf}n${sftrs}] " sfin
-        [[ "$sfin" =~ y|Y|^$ ]] && sfin=true || sfin=false
-    else
-        read -p "$1? [${sftbf}y${sftrs}/${sftbf}N${sftrs}] " sfin
+    if [ -n "$2" ]; then
+        read -r -p "$1? [${sftbf}y${sftrs}/${sftbf}N${sftrs}] " sfin
         [[ "$sfin" =~ n|N|^$ ]] && sfin=false || sfin=true
+    else
+        read -r -p "$1? [${sftbf}Y${sftrs}/${sftbf}n${sftrs}] " sfin
+        [[ "$sfin" =~ y|Y|^$ ]] && sfin=true || sfin=false
     fi
 }
 
 function sfget {
-    [ "$2" != "" ] && read -p "$1 [${sftbf}$2${sftrs}]: " sfin || read -p "$1: " sfin
+    if [ -n "$2" ]; then
+        read -r -p "$1 [${sftbf}$2${sftrs}]: " sfin
+    else
+        read -r -p "$1: " sfin
+    fi
     [ "$sfin" == "" ] && [ "$2" != "" ] && sfin="$2"
 }
 
@@ -55,64 +59,82 @@ function _sferr {
 # Declare variables for parsing
 OLDIFS=$IFS
 IFS=";"
-_sfphead=""
-_sfpdesc=""
-_sfodesc=""
-_sfexamples=""
 _sfpargs=()
+_sfpheads=()
+_sfpoffset=0
+_sfptails=()
+_sfpusage=""
+_sfoheads=()
+_sfooffset=0
+_sfotails=()
 declare -A _sfflags
 declare -A _sfargs
 
 # Parse sf arguments
+sfargs=("${sfargs[@]}" "help;h;Show this help message and exit")
 for a in "${sfargs[@]}"; do
 
     # Get amount of ;
     _sfsubst=${a//";"}
     _sfcount="$(((${#a} - ${#_sfsubst})))"
 
-    if [ $_sfcount -eq 1 ]; then
+    if [ "$_sfcount" -eq 1 ]; then
 
         # Read positional argument declaration
         read -r -a _sfparsearr <<< "${a}"
 
         # Add to positional argument arry
+        [[ " ${_sfpargs[*]} " =~ " ${_sfparsearr[0]} " ]] && _sferr "'${_sfparsearr[0]}' is already set: $a"
         _sfpargs+=("${_sfparsearr[0]}")
 
-        # Set usage header and description
-        _sfphead="$_sfphead ${_sfparsearr[0]}"
-        _sfpdesc="$_sfpdesc  ${_sfparsearr[0]};${_sfparsearr[1]}\n"
+        # Set usage header and append description arrays
+        _sfpusage="$_sfpusage ${_sfparsearr[0]}"
+        _sfphead="${_sfparsearr[0]}"
+        [ "${#_sfphead}" -gt "${_sfpoffset}" ] && _sfpoffset="${#_sfphead}"
+        _sfpheads+=("$_sfphead")
+        _sfptails+=("${_sfparsearr[1]}")
 
     # Flags
-    elif [ $_sfcount -eq 2 ]; then
+    elif [ "$_sfcount" -eq 2 ]; then
 
         # Read flag declaration
         read -r -a _sfparsearr <<< "${a}"
 
         # Set mappings
-        _sfflags["-${_sfparsearr[1]}"]="${_sfparsearr[0]}"
+        [ -n "${_sfflags["--${_sfparsearr[0]}"]}" ] && _sferr "'${_sfparsearr[0]}' is already set: $a"
         _sfflags["--${_sfparsearr[0]}"]="${_sfparsearr[0]}"
+        [ -n "${_sfflags["-${_sfparsearr[1]}"]}" ] && _sferr "'${_sfparsearr[1]}' is already set: $a"
+        _sfflags["-${_sfparsearr[1]}"]="${_sfparsearr[0]}"
 
         # Set default value
-        declare ${_sfparsearr[0]}=false
+        declare "${_sfparsearr[0]//-/_}"=false
 
-        # Set description
-        _sfodesc="$_sfodesc  -${_sfparsearr[1]}, --${_sfparsearr[0]};${_sfparsearr[2]}\n"
+        # Append description arrays
+        _sfohead="-${_sfparsearr[1]}, --${_sfparsearr[0]}"
+        [ "${#_sfohead}" -gt "${_sfooffset}" ] && _sfooffset="${#_sfohead}"
+        _sfoheads+=("$_sfohead")
+        _sfotails+=("${_sfparsearr[2]}")
 
     # Arguments
-    elif [ $_sfcount -eq 4 ]; then
+    elif [ "$_sfcount" -eq 4 ]; then
 
         # Read argument declaration
         read -r -a _sfparsearr <<< "${a}"
 
         # Set mappings
-        _sfargs["-${_sfparsearr[1]}"]="${_sfparsearr[0]}"
+        [ -n "${_sfargs["--${_sfparsearr[0]}"]}" ] && _sferr "'${_sfparsearr[0]}' is already set: $a"
         _sfargs["--${_sfparsearr[0]}"]="${_sfparsearr[0]}"
+        [ -n "${_sfargs["-${_sfparsearr[1]}"]}" ] && _sferr "'${_sfparsearr[1]}' is already set: $a"
+        _sfargs["-${_sfparsearr[1]}"]="${_sfparsearr[0]}"
 
         # Set default value
-        declare ${_sfparsearr[0]}="${_sfparsearr[3]}"
+        declare "${_sfparsearr[0]//-/_}"="${_sfparsearr[3]}"
 
-        # Set description
-        _sfodesc="$_sfodesc  -${_sfparsearr[1]}, --${_sfparsearr[0]} ${_sfparsearr[2]};${_sfparsearr[4]} (default: ${_sfparsearr[3]})\n"
+        # Append description arrays
+        _sfohead="-${_sfparsearr[1]}, --${_sfparsearr[0]} ${_sfparsearr[2]}"
+        [ "${#_sfohead}" -gt "${_sfooffset}" ] && _sfooffset="${#_sfohead}"
+        _sfoheads+=("$_sfohead")
+        [ "${_sfparsearr[3]}" != "" ] && _sfotails+=("${_sfparsearr[4]} (default: ${_sfparsearr[3]})") || _sfotails+=("${_sfparsearr[4]}")
 
     else
         _sferr "Wrong argument declaration: $a"
@@ -120,18 +142,26 @@ for a in "${sfargs[@]}"; do
 done
 
 # Parse examples
+_sfeheads=()
+_sfetails=()
+_sfeoffset=0
 for e in "${sfexamples[@]}"; do
 
     # Get amount of ;
     _sfsubst=${e//";"}
     _sfcount="$(((${#e} - ${#_sfsubst})))"
 
-    if [ $_sfcount -eq 1 ]; then
+    if [ "$_sfcount" -eq 1 ]; then
 
         # Read example
         read -r -a _sfparsearr <<< "${e}"
 
-        _sfexamples="$_sfexamples  ${_sfparsearr[0]};${_sfparsearr[1]}\n"
+        # Append example arrays
+        _sfehead="${_sfparsearr[0]}"
+        [ "${#_sfehead}" -gt "${_sfeoffset}" ] && _sfeoffset="${#_sfehead}"
+        _sfeheads+=("$_sfehead")
+        _sfetails+=("${_sfparsearr[1]}")
+
     else
         _sferr "Wrong example declaration: $e"
     fi
@@ -139,25 +169,76 @@ done
 
 IFS=$OLDIFS
 
+# Check if at least one positional argument is set if 'sfparr' is used
+[ "$sfparr" == true ] && [ "${#_sfpargs[@]}" == 0 ] && _sferr "At least one positional argument must be used with 'sfparr'"
+
+# Correct offsets
+_sfpoffset=$(( "_sfpoffset" + 3 ))
+_sfooffset=$(( "_sfooffset" + 3 ))
+_sfeoffset=$(( "_sfeoffset" + 3 ))
+
+# Set _sfwidth to current terminal width
+_sfwidth=$(stty size | cut -d ' ' -f 2)
+
+# Create positional argument description with correct line breaks
+_sfpdesc=""
+for i in "${!_sfptails[@]}"; do
+    _sfptail="${_sfptails[$i]}"
+    if [ "$(( ${#_sfptail} + _sfpoffset ))" -gt "$_sfwidth" ]; then
+        _sftmpwidth="$(( _sfwidth - _sfpoffset ))"
+        _sftmpwidth=$(echo -e "${_sftmpwidth}\n1" | sort -nr | head -n 1)
+        _sfptail=$(echo "$_sfptail" | fold -s -w "$_sftmpwidth")
+        _sfptail="${_sfptail//$' \n'/$'\n;'}"
+    fi
+    _sfpdesc="${_sfpdesc}  ${_sfpheads[$i]};${_sfptail}\n"
+done
+
+# Create option description with correct line breaks
+_sfodesc=""
+for i in "${!_sfotails[@]}"; do
+    _sfotail="${_sfotails[$i]}"
+    if [ "$(( ${#_sfotail} + _sfooffset ))" -gt "$_sfwidth" ]; then
+        _sftmpwidth="$(( _sfwidth - _sfooffset ))"
+        _sftmpwidth=$(echo -e "${_sftmpwidth}\n1" | sort -nr | head -n 1)
+        _sfotail=$(echo "$_sfotail" | fold -s -w "$_sftmpwidth")
+        _sfotail="${_sfotail//$' \n'/$'\n;'}"
+    fi
+    _sfodesc="${_sfodesc}  ${_sfoheads[$i]};${_sfotail}\n"
+done
+
+# Create examples description with correct line breaks
+_sfexamples=""
+for i in "${!_sfetails[@]}"; do
+    _sfetail="${_sfetails[$i]}"
+    if [ "$(( ${#_sfetail} + _sfeoffset ))" -gt "$_sfwidth" ]; then
+        _sftmpwidth="$(( _sfwidth - _sfeoffset ))"
+        _sftmpwidth=$(echo -e "${_sftmpwidth}\n1" | sort -nr | head -n 1)
+        _sfetail=$(echo "$_sfetail" | fold -s -w "$_sftmpwidth")
+        _sfetail="${_sfetail//$' \n'/$'\n;'}"
+    fi
+    _sfexamples="${_sfexamples}  ${_sfeheads[$i]};${_sfetail}\n"
+done
+
 # Usage function
 function _sfusage {
-    echo -n "Usage: $(basename $0)"
-    [ "$_sfodesc" != "" ] && echo -n " [OPTIONS]"
-    echo -e "$_sfphead"
-    [ ! -z ${sfdesc+x} ] && echo -e "\n$sfdesc"
+    echo -n "Usage: $(basename "$0") [OPTIONS]"
+    echo -ne "$_sfpusage"
+    [ "$sfparr" == true ] && echo -n " ..."
+    echo
+    [ -n "${sfdesc}" ] && echo -e "\n$sfdesc" | fold -s -w "$_sfwidth"
     if [ "$_sfpdesc" != "" ]; then
         echo -e "\nPOSITIONAL ARGUMENTS"
-        echo -e "$_sfpdesc" | column -c 80 -s ";" -t -W 2
+        echo -e "$_sfpdesc" | column -s ";" -t -W 2
     fi
     if [ "$_sfodesc" != "" ]; then
         echo -e "\nOPTIONS"
-        echo -e "$_sfodesc" | column -c 80 -s ";" -t -W 2
+        echo -e "$_sfodesc" | column -s ";" -t -W 2
     fi
     if [ "$_sfexamples" != "" ]; then
         echo -e "\nEXAMPLES"
-        echo -e "$_sfexamples" | column -c 80 -s ";" -t -W 2
+        echo -e "$_sfexamples" | column -s ";" -t -W 2
     fi
-    if [ ! -z ${sfextra+x} ]; then
+    if [ -n "${sfextra}" ]; then
         echo -e "\n$sfextra"
     fi
     exit 0
@@ -169,19 +250,28 @@ for a in "$@"; do
     [ "$a" == "-h" ] || [ "$a" == "--help" ] && _sfusage
 done
 
+# Check if dependencies are available
+for d in "${sfdeps[@]}"; do
+    if ! command -v "$d" &> /dev/null; then
+        sferr "Command ${sftbf}${d}${sftrs} not found" 0
+        _sfdeperr=true
+    fi
+done
+[ "$_sfdeperr" == true ] && exit 1
+
 # Parse arguments
 while (( "$#" )); do
 
     # Check if flag
-    if [ ! -z ${_sfflags["$1"]} ]; then
-        declare ${_sfflags["$1"]}=true
+    if [ -n "${_sfflags["$1"]}" ]; then
+        declare "${_sfflags["$1"]//-/_}"=true
 
     # Check if argument
-    elif [ ! -z ${_sfargs["$1"]} ]; then
+    elif [ -n "${_sfargs["$1"]}" ]; then
 
         # Check if argument has value
         if [ -n "$2" ] && [ "${2:0:1}" != "-" ]; then
-            declare ${_sfargs["$1"]}="$2"
+            declare "${_sfargs["$1"]//-/_}"="$2"
             shift
         else
             sferr "Argument for '$1' missing"
@@ -191,12 +281,15 @@ while (( "$#" )); do
     else
         # Check if arg starts with -
         if [ "${1:0:1}" == "-" ]; then
-            sferr "Unsupported argument: $1"
+            sferr "Unsupported argument/flag: $1"
         else
             # Set positional argument
             if [ "${#_sfpargs[@]}" != 0 ]; then
-                declare ${_sfpargs[0]}="$1"
+                declare "${_sfpargs[0]//-/_}"="$1"
+                [ "$sfparr" == true ] && _sfplast="${_sfpargs[0]//-/_}" && _sfparr=("$1")
                 _sfpargs=("${_sfpargs[@]:1}")
+            elif [ "$sfparr" == true ]; then
+                _sfparr+=("$1")
             else
                 sferr "Too many positional arguments"
             fi
@@ -205,8 +298,11 @@ while (( "$#" )); do
     shift
 done
 
+# Parse additional arguments if 'sfparr' is set
+[ "$sfparr" == true ] && [ "${#_sfparr[@]}" -gt 0 ] && read -r -a "${_sfplast?}" <<< "${_sfparr[@]}"
+
 # Check if positional arguments left
-if [ ${#_sfpargs[@]} != 0 ]; then
+if [ "${#_sfpargs[@]}" -gt 0 ]; then
     for p in "${_sfpargs[@]}"; do
         sferr "Positional argument '$p' missing" 0
     done
@@ -214,4 +310,4 @@ if [ ${#_sfpargs[@]} != 0 ]; then
 fi
 
 # Unset all internal variables and functions
-unset a e _sfphead _sfpdesc _sfodesc _sfexamples _sfpargs _sfflags _sfargs _sferr _sfusage
+unset a d e i OLDIFS _sfargs _sfehead _sfeheads _sfeoffset _sferr _sfetails _sfexamples _sfflags _sfodesc _sfohead _sfoheads _sfooffset _sfotails _sfpargs _sfparr _sfpdesc _sfphead _sfpheads _sfplast _sfpoffset _sfptails _sfpusage _sftmpwidth _sfusage _sfwidth