Reformatage de l’alias pdf + intégration de pdf2grey dans pdf

aliases/pdf.elv

@@ -1,138 +1,109 @@
-use moi/util/format
+edit:add-var pdf~ {|action @args|
-use moi/util/pdf
+  use math
-use math
+  use path
-use path
+  use re
-use re
+  use str
-use str
+  use framagit.org/benjamin.vaudour/elv-lib/mods/common
+  use framagit.org/benjamin.vaudour/elv-lib/mods/format
+  use framagit.org/benjamin.vaudour/elv-lib/mods/map
+  use framagit.org/benjamin.vaudour/elv-lib/mods/pdf
 
-fn -must-pdf {|file|
+  var -c~ = $common:cexec~
-  if (not (pdf:is-pdf $file)) {
+  var -cc~ = {|c f1| -c $c $f1 $nop~}
-    fail (printf '%s n’est pas un fichier pdf' $file)
+
+  fn must-pdf {|file| -cc (not (pdf:is-pdf $file)) { fail (printf '%s n’est pas un fichier pdf' $file) }}
+  fn must-exist {|file| -cc (pdf:not-exist $file) { fail (printf '%s n’existe pas' $file) }}
+  fn must-not-exist {|file| -cc (pdf:exist $file) { fail (printf '%s existe déjà' $file) }}
+  fn must-pdf-exist {|file|
+    must-pdf $file
+    must-exist $file
   }
-}
+  fn must-pdf-not-exist {|file|
-
+    must-pdf $file
-fn -must-exist {|file|
+    must-not-exist $file
-  if (pdf:not-exist $file) {
-    fail (printf '%s n’existe pas' $file)
   }
-}
+  fn must-valid {|v cond| -cc (not ($cond $v)) { fail (printf '%s: paramètre invalide' $v) }}
 
-fn -must-not-exist {|file|
+  fn out {|in suffix|
-  if (pdf:exist $file) {
-    fail (printf '%s existe déjà' $file)
-  }
-}
-
-fn -must-pdf-exist {|file|
-  -must-pdf $file
-  -must-exist $file
-}
-
-fn -must-pdf-not-exist {|file|
-  -must-pdf $file
-  -must-not-exist $file
-}
-
-fn -must-valid {|v cond|
-  if (not ($cond $v)) {
-    fail (printf '%s: paramètre invalide' $v)
-  }
-}
-
-fn -out {|in suffix|
     var out = (str:trim-suffix $in .pdf)
     str:join '' [ $out $suffix ]
-}
-
-fn help {|@args|
-  cat $E:HOME/.config/elvish/aliases/pdf.help
-}
-
-fn decrypt {|@args|
-  var l = (count $args)
-  if (or (< $l 1) (> $l 3)) {
-    fail 'decrypt doit contenir entre 1 et 3 paramètres'
   }
+
+  fn help {|@args| cat $E:HOME/.config/elvish/aliases/pdf.help}
+
+  fn decrypt {|@args|
+    var l = (count $args)
+    -cc (or (< $l 1) (> $l 3)) { fail 'decrypt doit contenir entre 1 et 3 paramètres' }
     var in     = $args[0]
-  var out    = (-out $in _decrypted.pdf)
+    var out    = (out $in _decrypted.pdf)
     var passwd = []
-  -must-pdf-exist $in
+    must-pdf-exist $in
     if (> $l 1) {
       set @passwd = $args[1]
       if (> $l 2) {
         set out = $args[2]
       }
     }
-  -must-pdf-not-exist $out
+    must-pdf-not-exist $out
     pdf:decrypt &out=$out $in $@passwd
-}
-
-fn rotate {|@args|
-  var l = (- (count $args) 1)
-  if (< $l 1) {
-    fail 'rotate doit contenir au moins 1 paramètres'
   }
+
+  fn rotate {|@args|
+    var l = (- (count $args) 1)
+    -cc (< $l 1) { fail 'rotate doit contenir au moins 1 paramètres' }
     var in  = $args[0]
-  var out = (-out $in _rotated.pdf)
+    var out = (out $in _rotated.pdf)
     if (pdf:is-pdf $args[$l]) {
       set @args out = (all $args[1..])
     }
-  -must-pdf-exist $in
+    must-pdf-exist $in
-  -must-pdf-not-exist $out
+    must-pdf-not-exist $out
     each {|e|
-    -must-valid $e $pdf:is-rotate-selection~
+      must-valid $e $pdf:is-rotate-selection~
     } $args
     pdf:rotate &keep=$true &out=$out $in $@args
-}
-
-fn merge {|@args|
-  var l = (- (count $args) 1)
-  if (< $l 1) {
-    fail 'merge doit contenir au moins 2 paramètres'
   }
+
+  fn merge {|@args|
+    var l = (- (count $args) 1)
+    -cc (< $l 1) { fail 'merge doit contenir au moins 2 paramètres' }
     var @selection out = $@args
-  -must-pdf-not-exist $out
+    must-pdf-not-exist $out
     var has-in = $false
     each {|e|
       if (pdf:is-pdf $e) {
-      -must-exist $e
+        must-exist $e
         set has-in = $true
       } else {
-      if (not $has-in) {
+        -cc (not $has-in) { fail 'Une sélection doit être précédée d’un fichier d’entrée' }
-        fail 'Une sélection doit être précédée d’un fichier d’entrée'
+        must-valid $e $pdf:is-selection~
-      }
-      -must-valid $e $pdf:is-selection~
       }
     } $selection
     pdf:cat &out=$out $@selection
-}
-
-fn unmerge {|@args|
-  var l = (- (count $args) 1)
-  if (< $l 1) {
-    fail 'unmerge doit contenir au moins 2 paramètres'
   }
+
+  fn unmerge {|@args|
+    var l = (- (count $args) 1)
+    -cc (< $l 1) { fail 'unmerge doit contenir au moins 2 paramètres' }
     var in  = $args[0]
-  var out = (-out $in _unmerged)
+    var out = (out $in _unmerged)
     if (not (pdf:is-selection $args[$l])) {
       set @args out = (all $args[1..])
     }
-  -must-pdf-exist $in
+    must-pdf-exist $in
-  -must-not-exist $out
+    must-not-exist $out
     each {|e|
-    -must-valid $e $pdf:is-selection~
+      must-valid $e $pdf:is-selection~
     } $args
     pdf:uncat $in $out $@args
-}
-
-fn split {|@args|
-  var l = (- (count $args) 1)
-  if (< $l 1) {
-    fail 'split doit contenir au moins 2 paramètres'
   }
+
+  fn split {|@args|
+    var l = (- (count $args) 1)
+    -cc (< $l 1) { fail 'split doit contenir au moins 2 paramètres' }
     var out  = $args[$l]
     set args = $args[..$l]
-  -must-not-exist $out
+    must-not-exist $out
     var s = 1
     if (pdf:is-number $args[0]) {
       set s @args = $@args
@@ -144,18 +115,15 @@ fn split {|@args|
     } finally {
       rm -f $t
     }
-}
-
-fn split-at {|@args|
-  var l = (count $args)
-  if (!= $l 3) {
-    fail 'split-at doit contenir 3 paramètres'
   }
-  var rg in out = $@args
-  -must-pdf-exist $in
-  -must-not-exist $out
-  -must-valid $rg {|e| re:match '^\d+(,\d+)*$' $e }
 
+  fn split-at {|@args|
+    var l = (count $args)
+    -cc (!= $l 3) { fail 'split-at doit contenir 3 paramètres' }
+    var rg in out = $@args
+    must-pdf-exist $in
+    must-not-exist $out
+    must-valid $rg {|e| re:match '^\d+(,\d+)*$' $e }
     var b sel = 1 []
     str:split ',' $rg | order | each {|s|
       var e = (- $s 1)
@@ -169,45 +137,37 @@ fn split-at {|@args|
     }
     set @sel = $@sel (printf '%d-z' $b)
     unmerge $in $@sel $out
-}
-
-fn zip {|@args|
-  var l = (- (count $args) 1)
-  if (< $l 1) {
-    fail 'zip doit contenir au moins 2 paramètres'
   }
+
+  fn zip {|@args|
+    var l = (- (count $args) 1)
+    -cc (< $l 1) { fail 'zip doit contenir au moins 2 paramètres' }
     var @selection out = $@args
-  -must-pdf-not-exist $out
+    must-pdf-not-exist $out
     var has-in = $false
     each {|e|
       if (pdf:is-pdf $e) {
-      -must-exist $e
+        must-exist $e
         set has-in = $true
       } else {
-      if (not $has-in) {
+        -cc (not $has-in) { fail 'Une sélection doit être précédée d’un fichier d’entrée' }
-        fail 'Une sélection doit être précédée d’un fichier d’entrée'
+        must-valid $e $pdf:is-selection~
-      }
-      -must-valid $e $pdf:is-selection~
       }
     } $selection
     pdf:cat &collate=$true &out=$out $@selection
-}
-
-fn unzip {|@args|
-  var l = (- (count $args) 1)
-  if (< $l 1) {
-    fail 'unzip doit contenir au moins 2 paramètres'
   }
+
+  fn unzip {|@args|
+    var l = (- (count $args) 1)
+    -cc (< $l 1) { fail 'unzip doit contenir au moins 2 paramètres' }
     var in @sel out = $@args
     var mod         = 2
     if (pdf:is-number $in) {
       set mod = $in
-    if (eq (count $sel) 0) {
+      -cc (eq (count $sel) 0) { fail 'unzip doit contenir au moins 3 paramètres' }
-      fail 'unzip doit contenir au moins 3 paramètres'
-    }
       set in @sel = $@sel
     }
-  -must-not-exist $out
+    must-not-exist $out
     var t    = (pdf:-t)
     try {
       pdf:cat &out=$t $in $@sel
@@ -216,47 +176,30 @@ fn unzip {|@args|
       range 1 (+ 1 $mod) | each {|m|
         var sel = (range 1 (+ $n 1) | each {|i|
           var s = (% $i $mod)
-        if (== $s 0) {
+          -cc (== $s 0) { set s = $mod }
-          set s = $mod
+          -cc (== $s $m) $i
-        }
-        if (== $s $m) {
-          put $i
-        }
         } | each $to-string~ | str:join ',')
         pdf:cat &out=(printf '%s/%d.pdf' $out $m) $t $sel
       }
     } finally {
       rm -f $t
     }
-}
+  }
 
-fn -pts2cm {|v|
+  fn pts2cm {|v| / (math:round (* $v 3.52778)) 100}
-  / (math:round (* $v 3.52778)) 100
+  fn -date {|raw|
-}
-
-fn -date {|raw|
     var y m d = $raw[2..6] $raw[6..8] $raw[8..10]
     var h n s = $raw[10..12] $raw[12..14] $raw[14..16]
     var rest  = []
-  if (> (count $raw[16..]) 0) {
+    -cc (> (count $raw[16..]) 0) { set @rest = (str:split "'" $raw[16..]) }
-    set @rest = (str:split "'" $raw[16..])
-  }
     var tz    = '+00:00'
     if (> (count $rest) 0) {
       var tz = $rest[0]
-    if (eq $tz[0] 'Z') {
+      -cc (eq $tz[0] 'Z') { set tz = $tz[1..] }
-      set tz = $tz[1..]
+      -cc (eq $tz '') { set tz = '00' }
-    }
+      -cc (and (not-eq $tz[0] '+') (not-eq $tz[0] '-')) { set tz = (printf '+%s' $tz) }
-    if (eq $tz '') {
-      set tz = '00'
-    }
-    if (and (not-eq $tz[0] '+') (not-eq $tz[0] '-')) {
-      set tz = (printf '+%s' $tz)
-    }
       var mm = '00'
-    if (and (> (count $rest) 1) (pdf:is-number $rest[1])) {
+      -cc (and (> (count $rest) 1) (pdf:is-number $rest[1])) { set mm = $rest[1] }
-      set mm = $rest[1]
-    }
       set tz = (printf '%s:%s' $tz $mm)
     }
     var date = (printf ^
@@ -265,57 +208,28 @@ fn -date {|raw|
       $h $n $s ^
       $tz)
     date --date $date
-}
-
-fn info {|@args|
-  if (!= (count $args) 1) {
-    fail 'info doit contenir un paramètre'
   }
+
+  fn info {|@args|
+    -cc (!= (count $args) 1) { fail 'info doit contenir un paramètre' }
     var in @_ = $@args
-  -must-pdf-exist $in
+    must-pdf-exist $in
     var json     = (pdf:json $in)
     var objects  = $json[objects]
     var trailer  = $objects[trailer]
     var infos    = $objects[$trailer[/Info]]
     var pages    = $json[pages]
     var p1       = $objects[$pages[0][object]]
-  var w h      = (all $p1[/MediaBox][2..] | each $-pts2cm~)
+    var w h      = (all $p1[/MediaBox][2..] | each $pts2cm~)
-  var layout   = 'Portrait'
+    var layout   = (-c (> $w $h) 'Paysage' 'Portrait')
-  var title    = ''
+    var title    = (map:value-of $infos '/Title')
-  var subject  = ''
+    var subject  = (map:value-of $infos '/Subject')
-  var author   = ''
+    var author   = (map:value-of $infos '/Author')
-  var creator  = ''
+    var creator  = (map:value-of $infos '/Creator')
-  var producer = ''
+    var producer = (map:value-of $infos '/Producer')
-  var mdate    = ''
+    var mdate    = (-c (has-key $infos '/ModDate') { -date $infos[/ModDate] } '')
-  var crypted  = 'Non'
+    var crypted  = (-c (pdf:encryption $in)[encrypted] 'Oui' 'Non')
-  var hasform  = 'Non'
+    var hasform  = ( -c (pdf:form $in)[hasacroform] 'Oui' 'Non')
-  if (> $w $h) {
-    set layout = 'Paysage'
-  }
-  if (has-key $infos '/Title') {
-    set title = $infos[/Title]
-  }
-  if (has-key $infos '/Subject') {
-    set subject = $infos[/Subject]
-  }
-  if (has-key $infos '/Author') {
-    set author = $infos[/Author]
-  }
-  if (has-key $infos '/Creator') {
-    set creator = $infos[/Creator]
-  }
-  if (has-key $infos '/Producer') {
-    set producer = $infos[/Producer]
-  }
-  if (has-key $infos '/ModDate') {
-    set mdate = (-date $infos[/ModDate])
-  }
-  if (pdf:encryption $in)[encrypted] {
-    set crypted = 'Oui'
-  }
-  if (pdf:form $in)[hasacroform] {
-    set hasform = 'Oui'
-  }
     var data    = [
       [&k='Chemin'               &v=(path:abs $in)]
       [&k='Taille'               &v=(format:size (stat -c '%s' $in))]
@@ -338,47 +252,31 @@ fn info {|@args|
     var sep    = (format:repeat (+ $props[0][size] $props[1][size] 3) '.')
     var @part  = $data[..5] $data[5..12] $data[12..]
     each {|d|
-    format:list &with-header=$false &csep=' : ' &recompute=$false $props $d
+      format:list &with-header=$false &csep=' : ' &recompute=$false $props $@d
       echo $sep
     } $part
-}
+  }
 
-fn -list-attachments {|in|
+  fn list-attachments {|in| all (pdf:attachments $in)}
-  all (pdf:attachments $in)
+  fn display-attachments {|in|
-}
+    var @data = (list-attachments $in)
-
-fn -display-attachments {|in|
-  var @data = (-list-attachments $in)
     printf "%d pièce(s)-jointe(s) trouvée(s):\n\n" (count $data)
-  all $data | each $echo~
+    each $echo~ $data
     echo
-}
-
-fn -extract-attachments {|in out|
-  -list-attachments $in | each {|f|
-    pdf:attachment $in $out/$f $f
   }
-}
+  fn extract-attachments {|in out| list-attachments $in | each {|f| pdf:attachment $in $out/$f $f }}
-
+  fn list-fonts {|in|
-fn -list-fonts {|in|
     pdf:fonts $in | each {|f|
-    if (has-key $f /FontDescriptor) {
+      -cc (has-key $f /FontDescriptor) { put [&font=$f &fd=$f[/FontDescriptor]] }
-      put [&font=$f &fd=$f[/FontDescriptor]]
-    }
     } | each {|f|
-    if (has-key $f[fd] /FontName) {
+      -cc (has-key $f[fd] /FontName) { assoc $f name $f[fd][/FontName] }
-      assoc $f name $f[fd][/FontName]
-    }
     } | each {|f|
       var @_ n  = (str:split '+' $f[name])
       var font  = $f[font]
       var fd    = $f[fd]
       var embed = (has-key $fd /FontFile2)
-    var file  = ''
+      var file  = (-c $embed $fd[/FontFile2] '')
       set n = (str:trim-prefix $n '/')
-    if $embed {
-      set file = $fd[/FontFile2]
-    }
       put [
         &id=$font[id]
         &name=$n
@@ -388,10 +286,9 @@ fn -list-fonts {|in|
         &encoding=(str:trim-prefix $font[/Encoding] '/')
       ]
     }
-}
+  }
-
+  fn display-fonts {|in|
-fn -display-fonts {|in|
+    var @data = (list-fonts $in)
-  var @data = (-list-fonts $in)
     printf "%d police(s) trouvée(s):\n\n" (count $data)
     var props = [
       (format:column &align=center id ID)
@@ -401,26 +298,19 @@ fn -display-fonts {|in|
       (format:column &align=center embed Téléchargeable)
       (format:column &align=center file Fichier)
     ]
-  format:list $props $data
+    format:list $props $@data
     echo
-}
+  }
-
+  fn extract-fonts {|in out|
-fn -extract-fonts {|in out|
+    list-fonts $in | each {|f|
-  -list-fonts $in | each {|f|
+      -cc $f[embed] { pdf:filtered-stream $in (printf '%s/%s.ttf' $out $f[name]) $f[file] }
-    if $f[embed] {
-      pdf:filtered-stream $in (printf '%s/%s.ttf' $out $f[name]) $f[file]
     }
   }
-}
+  fn list-images {|in|
-
-fn -list-images {|in|
     pdf:images $in | each {|i|
-      var c  = ''
       var w = (format:int $i[/Width])
       var h = (format:int $i[/Height])
-      if (has-key $i /ColorSpace) {
+      var c = (-c (has-key $i /ColorSpace) { put $i[/ColorSpace][0] } '')
-        set c = $i[/ColorSpace][0]
-      }
       put [
         &id=$i[id]
         &page=(format:int $i[page])
@@ -441,12 +331,9 @@ fn -list-images {|in|
         var id = $img[object]
         var o  = (pdf:-object &extend=$true $objects $id)
         var s  = $o[/Length]
-      var c  = ''
+        var c  = (-c (has-key $o /ColorSpace) { put $o[/ColorSpace][0] } '')
         var w  = (format:int $o[/Width])
         var h  = (format:int $o[/Height])
-      if (has-key $o /ColorSpace) {
-        set c = $o[/ColorSpace][0]
-      }
         put [
           &id=$id
           &page=$pn
@@ -461,10 +348,9 @@ fn -list-images {|in|
         ]
       }
     }
-}
+  }
-
+  fn display-images {|in|
-fn -display-images {|in|
+    var @data = (list-images $in)
-  var @data = (-list-images $in)
     printf "%d image(s) trouvée(s):\n\n" (count $data)
     var props = [
       (format:column &align=right page Page)
@@ -476,63 +362,80 @@ fn -display-images {|in|
       (format:column &align=right bpc BPC)
       (format:column &align=center filter Filtre)
     ]
-  format:list $props $data
+    format:list $props $@data
     echo
-}
+  }
-
+  fn extract-images {|in out|
-fn -extract-images {|in out|
     # En attendant de savoir décoder correctement les images, on utilise poppler
     pdfimages -all $in $out/Im
-}
-
-fn list {|@args|
-  if (!= (count $args) 2) {
-    fail 'list doit comporter 2 paramètres'
   }
+
+  fn list {|@args|
+    -cc (!= (count $args) 2) { fail 'list doit comporter 2 paramètres' }
     var types in = $@args
-  -must-pdf-exist $in
+    must-pdf-exist $in
     var display = [
-    &a=$-display-attachments~
+      &a=$display-attachments~
-    &f=$-display-fonts~
+      &f=$display-fonts~
-    &i=$-display-images~
+      &i=$display-images~
     ]
     str:split ',' $types | each {|t|
       set t = (str:to-lower $t)
-    -must-valid $t {|e|
+      must-valid $t {|e| and (> (count $e) 0) (has-key $display $e[0])}
-      and (> (count $e) 0) (has-key $display $e[0])
-    }
       $display[$t[0]] $in
     }
-}
-
-fn extract {|@args|
-  if (!= (count $args) 3) {
-    fail 'extract doit comporter 3 paramètres'
   }
+
+  fn extract {|@args|
+  -cc (!= (count $args) 3) { fail 'extract doit comporter 3 paramètres' }
     var types in out = $@args
-  -must-pdf-exist $in
+    must-pdf-exist $in
-  -must-not-exist $out
+    must-not-exist $out
     var extr = [
-    &a=$-extract-attachments~
+      &a=$extract-attachments~
-    &f=$-extract-fonts~
+      &f=$extract-fonts~
-    &i=$-extract-images~
+      &i=$extract-images~
     ]
     try {
       mkdir $out
       str:split ',' $types | each {|t|
         set t = (str:to-lower $t)
-      -must-valid $t {|e|
+        must-valid $t {|e| and (> (count $e) 0) (has-key $extr $e[0])}
-        and (> (count $e) 0) (has-key $extr $e[0])
-      }
         $extr[$t[0]] $in $out
       }
     } except e {
       rm -rf $out
       fail $e
     }
-}
+  }
+
+  fn gray {|@args|
+    -cc (!= (count $args) 2) { fail 'gray doit comporter 2 paramètres' }
+    var in out = $@args
+    must-pdf-exist $in
+    must-pdf-not-exist $out
+    convert -colorspace gray $in $out
+  }
+
+  fn mono {|@args|
+    var c = (count $args)
+    -cc (or (< $c 2) (> $c 3)) { fail 'mono doit comporter entre 2 et 3 paramètres' }
+    var t = $nil
+    if (pdf:is-number $args[0]) {
+      set t @args = $@args
+      -cc (or (< $t 0) (> $t 100)) { fail le taux doit être compris entre 0 et 100 }
+      -cc (< $c 2) { fail 'mono doit comporter 3 paramètres' }
+    }
+    var in out = $@args
+    must-pdf-exist $in
+    must-pdf-not-exist $out
+    if $t {
+      convert -colorspace gray -threshold $t'%' $in $out
+    } else {
+      convert -monochrome $in $out
+    }
+  }
 
-edit:add-var pdf~ {|action @args|
   var actions = [
     &help=$help~
     &decrypt=$decrypt~
@@ -549,9 +452,10 @@ edit:add-var pdf~ {|action @args|
     &info=$info~
     &list=$list~
     &extract=$extract~
+    &gray=$gray~
+    &mono=$mono~
+    #&compress=$compress~
   ]
-  if (not (has-key $actions $action)) {
+  -cc (not (has-key $actions $action)) { fail (printf '%s: action inconnue' $action) }
-    fail (printf '%s: action inconnue' $action)
-  }
   $actions[$action] $@args
 }

aliases/pdf.help

@@ -29,6 +29,11 @@ Commandes:
     Retourne un fichier déchiffré. Si aucun mot de passe n’est donné, tente le déchiffrement
     avec un mot de passe à blanc
     Fichier de sortie par défaut : <inputfile>_decrypted.pdf
+  gray: <inputfile> <outputfile>
+    Convertit le fichier d’entrée en nuances de gris
+  mono: [<split>] <inputfile> <outputfile>
+    Convertit le fichier d’entrée en noir et blanc, au taux de coupure (exprimé en pourcentage, entre 0 et 100)
+    Défauts : <split> = 50
   list: (a(ttachments)|i(mages)|f(onts)) <inputfile>
     Affiche la liste des fichiers inclus en filtrant selon le type (pièce-jointe, image ou police)
   extract:  (a(ttachments)|i(mages)|f(onts)) <inputfile> <outputdir>

aliases/pdf2grey.elv

@@ -1,82 +0,0 @@
-edit:add-var pdf2grey~ {|@argv|
-  use re
-  use str
-  var m = [
-    &nb=$false
-    &split=50
-  ]
-
-  fn _help {||
-    echo 'Usage: pdf2gray [-hn (<n>)] <input>.pdf <output>.pdf'
-    echo ''
-    echo 'Options:'
-    echo '  -h         Affiche cette aide'
-    echo '  -n [0-100] Convertit en noir et blanc. Si un nombre est spécifié, indique le pourcentage de coupure (par défaut: 50)'
-  }
-
-  fn is_pdf {|e|
-    re:match '.*\.pdf$' $e
-  }
-
-  fn is_int {|e|
-    re:match '^\d+$' $e
-  }
-
-  fn is_split {|e|
-    and (>= $e 0) (<= $e 100)
-  }
-
-  while (> (count $argv) 0) {
-    var e @argv = $@argv
-    if (or (eq $e '-h') (eq $e '--help')) {
-      _help
-      return
-    } elif (eq $e -n) {
-      set m[nb] = $true
-      if (== (count $e) 0) {
-        echo 'Il manque des arguments après -s'
-        _help
-        return
-      } elif (is_int $argv[0]) {
-        set e @argv = $@argv
-        if (is_split $e) {
-          set m[split] = $e
-        } else {
-          echo 'L’argument (optionnel) après -s doit être compris entre 0 et 100'
-          _help
-          return
-        }
-      }
-    } elif (not (is_pdf $e)) {
-      echo 'Argument non reconnu: '$e
-      _help
-      return
-    } elif (not (has-key $m input)) {
-      set m[input] = $e
-    } else {
-      set m[output] = $e
-      if (> (count $argv) 0) {
-        echo 'Trop d’arguments: '$@argv
-        _help
-        return
-      }
-    }
-  }
-  if (not (has-key $m input)) {
-    echo 'Manque le input'
-    _help
-    return
-  } elif (not (has-key $m output)) {
-    echo 'Manque le output'
-    _help
-    return
-  }
-
-  var params = [-colorspace gray]
-  if $m[nb] {
-    set @params = (all $params) -threshold $m[split]'%'
-  }
-  set @params = $@params $m[input] $m[output]
-  echo 'Commande: convert '(str:join ' ' $params)
-  convert $@params
-}