diff --git a/nur_bin/compdep.php b/nur_bin/compdep.php
new file mode 100755
index 0000000..6653add
--- /dev/null
+++ b/nur_bin/compdep.php
@@ -0,0 +1,5 @@
+#!/usr/bin/php
+<?php
+require $_composer_autoload_path?? __DIR__.'/../vendor/autoload.php';
+
+\nur\tools\compctl\CompdepApp::run();
diff --git a/nur_src/ref/ref_type.php b/nur_src/ref/ref_type.php
index 117499a..4beb6c0 100644
--- a/nur_src/ref/ref_type.php
+++ b/nur_src/ref/ref_type.php
@@ -3,7 +3,6 @@ namespace nur\ref;
 
 use nur\data\types\Metadata;
 use nur\md;
-use nur\sery\php\content\content;
 
 /**
  * Class ref_type: référence des types utilisables dans les schémas
diff --git a/nur_src/shutils.php b/nur_src/shutils.php
index 768f00e..6350681 100644
--- a/nur_src/shutils.php
+++ b/nur_src/shutils.php
@@ -8,26 +8,45 @@ class shutils {
   static function ls_all(string $dir, ?string $pattern=null, int $sorting_order=SCANDIR_SORT_ASCENDING): array {
     $all = scandir($dir, $sorting_order);
     if ($all === false) return [];
-    return array_filter($all,
+    return array_values(array_filter($all,
       function ($file) use ($pattern) {
         if ($file === "." || $file === "..") return false;
         return $pattern === null || fnmatch($pattern, $file);
-      });
+      }
+    ));
   }
 
   static function ls_dirs(string $dir, ?string $pattern=null, int $sorting_order=SCANDIR_SORT_ASCENDING): array {
-    return array_filter(self::ls_all($dir, $pattern, $sorting_order),
+    return array_values(array_filter(self::ls_all($dir, $pattern, $sorting_order),
       function ($file) use ($dir) {
         return path::is_dir(path::join($dir, $file));
       }
-    );
+    ));
   }
 
   static function ls_files(string $dir, ?string $pattern=null, int $sorting_order=SCANDIR_SORT_ASCENDING): array {
-    return array_filter(self::ls_all($dir, $pattern, $sorting_order),
+    return array_values(array_filter(self::ls_all($dir, $pattern, $sorting_order),
       function ($file) use ($dir) {
         return path::is_file(path::join($dir, $file));
       }
-    );
+    ));
+  }
+
+  static function ls_pall(string $dir, ?string $pattern=null, int $sorting_order=SCANDIR_SORT_ASCENDING): array {
+    return array_map(function(string $name) use ($dir) {
+      return path::join($dir, $name);
+    }, self::ls_all($dir, $pattern, $sorting_order));
+  }
+
+  static function ls_pdirs(string $dir, ?string $pattern=null, int $sorting_order=SCANDIR_SORT_ASCENDING): array {
+    return array_map(function(string $name) use ($dir) {
+      return path::join($dir, $name);
+    }, self::ls_dirs($dir, $pattern, $sorting_order));
+  }
+
+  static function ls_pfiles(string $dir, ?string $pattern=null, int $sorting_order=SCANDIR_SORT_ASCENDING): array {
+    return array_map(function(string $name) use ($dir) {
+      return path::join($dir, $name);
+    }, self::ls_files($dir, $pattern, $sorting_order));
   }
 }
diff --git a/nur_src/tools/compctl/CompdepApp.php b/nur_src/tools/compctl/CompdepApp.php
new file mode 100644
index 0000000..ab1b035
--- /dev/null
+++ b/nur_src/tools/compctl/CompdepApp.php
@@ -0,0 +1,161 @@
+<?php
+namespace nur\tools\compctl;
+
+use nur\A;
+use nur\cli\Application;
+use nur\msg;
+use nur\shutils;
+
+class CompdepApp extends Application {
+  private static function split_pkey_value(string $pv): array {
+    if (preg_match('/([a-zA-Z0-9._-]+)=(.*)/', $pv, $ms)) {
+      return [$ms[1], $ms[2]];
+    } else {
+      return [$pv, true];
+    }
+  }
+
+  const SHOW_NAMES = "names", SHOW_DEPS = "deps", SHOW_DIRS = "dirs", SHOW_COMPOSER = "composer";
+  const ARGS = [
+    "purpose" => "Lister les dépendances d'un projet PHP",
+
+    ["-B", "--projects-dir", "args" => "dir",
+      "help" => "Spécifier le répertoire de base des projets",
+    ],
+    ["-w", "--rewrite",
+      "help" => "modifier le fichier composer.json au lieu d'afficher le nouveau contenu",
+    ],
+    ["--force-rewrite",
+      "help" => "en cas de modification, forcer la ré-écriture du fichier composer.json même s'il est inchangé",
+    ],
+    ["-s", "--set-pkey", "args" => 1, "argsdesc" => "PKEY=VALUE",
+      "help" => "créer ou modifier le chemin de clé avec la valeur spécifiée",
+    ],
+    ["-d", "--del-pkey", "args" => 1, "argsdesc" => "PKEY",
+      "help" => "supprimer le chemin de clé spécifié",
+    ],
+    ["-r", "--filter-dep", "args" => 1, "argsdesc" => "DEP",
+      "help" => "sélectionner tous les projets qui ont une dépendance sur la librairie spécifiée",
+    ],
+    ["-u", "--update-dep", "args" => "value", "argsdesc" => "VERSION",
+      "help" => "mettre à jour la dépendance avec la nouvelle cible/version.
+requière l'utilisation de --filter-dep",
+    ],
+    ["--sn", "--show-names", "name" => "show", "value" => self::SHOW_NAMES,
+      "help" => "afficher les noms des projets",
+    ],
+    ["--sp", "--show-deps", "name" => "show", "value" => self::SHOW_DEPS,
+      "help" => "afficher les branches",
+    ],
+    ["--sb", "--show-branches",
+      "help" => "avec --show-deps, afficher aussi les branches",
+    ],
+    ["--sf", "--show-filtered",
+      "help" => "avec --show-deps, n'afficher que la dépendances sélectionnée
+implique --show-branches",
+    ],
+    ["--sd", "--show-dirs", "name" => "show", "value" => self::SHOW_DIRS,
+      "help" => "afficher les répertoires des projets",
+    ],
+    ["--sc", "--show-composer", "name" => "show", "value" => self::SHOW_COMPOSER,
+      "help" => "afficher les chemins des fichiers composer.json de chaque projet",
+    ],
+  ];
+
+  private $projectsDir;
+  private $rewrite = false, $forceRewrite = false;
+  private $setPkey, $delPkey;
+  private $filterDep, $updateDep;
+  private $show = self::SHOW_DEPS, $showBranches, $showFiltered;
+  private $args;
+
+  function main() {
+    $projectDirs = $this->args;
+    $rewrite = $this->rewrite;
+    $forceRewrite = $this->forceRewrite;
+    $setPkey = $this->setPkey;
+    $delPkey = $this->delPkey;
+    $filterDep = $this->filterDep;
+    $updateDep = $this->updateDep;
+    $projectsDir = $this->projectsDir;
+    $show = $this->show;
+    $showBranches = $this->showBranches;
+    $showFiltered = $this->showFiltered;
+
+    if ($updateDep && !$filterDep) {
+      self::die("--update-dep requière --filter-dep");
+    }
+
+    if (!$projectDirs) {
+      if ($projectsDir !== null) {
+        $projectDirs = shutils::ls_pdirs($projectsDir);
+      } else {
+        if (file_exists("composer.json")) {
+          $projectDirs = ["."];
+        } else {
+          $projectsDir = ".";
+          $projectDirs = shutils::ls_pdirs($projectsDir);
+        }
+      }
+    }
+    $projects = ComposerWalker::build_projects($projectDirs, $projectsDir);
+    $oprojects = ComposerWalker::order_deps(null, $projects);
+
+    foreach ($oprojects as $name) {
+      $project = A::get($projects, $name);
+      if ($project === null) continue;
+      $requires = ComposerWalker::order_deps($project["requires"], $projects);
+      $branches = $project["branches"];
+      if ($filterDep && !in_array($filterDep, $requires)) {
+        continue;
+      }
+
+      if ($setPkey || $delPkey || $updateDep) {
+        /** @var ComposerFile $composer */
+        $composer = $project["composer"];
+        msg::step($composer->getComposerFile());
+        if ($setPkey) {
+          [$pkey, $value] = self::split_pkey_value($setPkey);
+          $composer->setPkey($pkey, $value, $rewrite, $forceRewrite);
+        } elseif ($delPkey) {
+          [$pkey, $value] = self::split_pkey_value($delPkey);
+          $composer->delPkey($pkey, $rewrite, $forceRewrite);
+        } elseif ($updateDep) {
+          $composer->updateDep($filterDep, $updateDep, $rewrite, $forceRewrite);
+        }
+      } else {
+        switch ($show) {
+        case self::SHOW_NAMES:
+          echo $name;
+          break;
+        case self::SHOW_DEPS:
+          echo $name; $pos = strlen($name);
+          $sep = ": ";
+          foreach ($requires as $require) {
+            if ($showFiltered && $require !== $filterDep) continue;
+            $text = $require;
+            if ($showBranches || $showFiltered) {
+              $branch = A::get($branches, $require);
+              if ($branch !== null) $text .= "[$branch]";
+            }
+            $size = strlen("$sep$text");
+            if ($pos + $size > 80) {
+              $sep = "\n".str_repeat(" ", 4); $pos = 4;
+              $size = strlen($text);
+            }
+            echo "$sep$text"; $pos += $size;
+            $sep = ", ";
+          }
+          break;
+        case self::SHOW_DIRS:
+          echo $project["dir"];
+          break;
+        case self::SHOW_COMPOSER:
+          echo "$project[dir]/composer.json";
+          break;
+        }
+        echo "\n";
+      }
+    }
+  }
+}
diff --git a/nur_src/tools/compctl/ComposerFile.php b/nur_src/tools/compctl/ComposerFile.php
index bb6cc89..d18c575 100644
--- a/nur_src/tools/compctl/ComposerFile.php
+++ b/nur_src/tools/compctl/ComposerFile.php
@@ -15,7 +15,7 @@ class ComposerFile {
   function __construct(string $composerFile, ?string $projdir=null, bool $ensureExists=true) {
     if ($ensureExists && !file_exists($composerFile)) {
       if ($projdir === null) $projdir = dirname($composerFile);
-      $message = path::ppath($projdir).": aucune composeruration n'a été trouvée";
+      $message = path::ppath($projdir).": aucune configuration n'a été trouvée";
       throw new ValueException($message);
     }
     $this->composerFile = $composerFile;
@@ -24,6 +24,10 @@ class ComposerFile {
   /** @var string */
   protected $composerFile;
 
+  function getComposerFile(): string {
+    return $this->composerFile;
+  }
+
   /** @var array */
   protected $data;
 
@@ -196,15 +200,36 @@ class ComposerFile {
     return [$data != $orig, $data];
   }
 
-  function sync(ConfigFile $config, string $branch, bool $inplace=false): bool {
-    [$modified, $json] = $this->computeComposer($config, $branch);
-    $contents = json::with($json, json::INDENT_TABS);
-    if ($inplace) {
-      if ($modified) file::with($this->composerFile)->putContents($contents);
+  protected function _save(array $data, bool $modified, bool $rewrite, bool $forceRewrite): bool {
+    $contents = json::with($data, json::INDENT_TABS);
+    if ($rewrite) {
+      $contents .= "\n";
+      if ($modified || $forceRewrite) file::with($this->composerFile)->putContents($contents);
       else msg::info("Aucune modifications effectuée");
     } else {
-      if ($contents !== null) echo "$contents\n";
+      if ($contents) echo "$contents\n";
     }
     return $modified;
   }
+
+  function sync(ConfigFile $config, string $branch, bool $rewrite=false, bool $forceRewrite=false): bool {
+    [$modified, $data] = $this->computeComposer($config, $branch);
+    return $this->_save($data, $modified, $rewrite, $forceRewrite);
+  }
+
+  function setPkey(string $pkey, $value, bool $rewrite=false, bool $forceRewrite=false): bool {
+    $data = $orig = $this->load();
+    A::pset($data, $pkey, $value);
+    return $this->_save($data, $data != $orig, $rewrite, $forceRewrite);
+  }
+
+  function delPkey(string $pkey, bool $rewrite=false, bool $forceRewrite=false): bool {
+    $data = $orig = $this->load();
+    A::pdel($data, $pkey);
+    return $this->_save($data, $data != $orig, $rewrite, $forceRewrite);
+  }
+
+  function updateDep(string $dep, string $version, bool $rewrite=false, bool $forceRewrite=false): bool {
+    return $this->setPkey("require.$dep", $version, $rewrite, $forceRewrite);
+  }
 }
diff --git a/nur_src/tools/compctl/ComposerWalker.php b/nur_src/tools/compctl/ComposerWalker.php
new file mode 100644
index 0000000..7921922
--- /dev/null
+++ b/nur_src/tools/compctl/ComposerWalker.php
@@ -0,0 +1,115 @@
+<?php
+namespace nur\tools\compctl;
+
+use Exception;
+use nur\A;
+
+class ComposerWalker {
+  protected static function get_project_dir($name, string $projects_dir) {
+    $project_dir = A::get(ConfigFile::PROJNAMES, $name);
+    if ($project_dir === null) {
+      $project_dir = preg_replace('/\//', "-", $name, 1);
+    }
+    return "$projects_dir/$project_dir";
+  }
+
+  static function parse_project(string $dir, array &$projects, ?array &$new_projects=null, bool $throw=false): ?array {
+    try {
+      $composer = new ComposerFile("$dir/composer.json");
+    } catch (Exception $e) {
+      if ($throw) throw $e;
+      else return null;
+    }
+
+    $pname = $composer->getv("name");
+    if (array_key_exists($pname, $projects) && $projects[$pname] !== null) {
+      # projet déjà analysé
+      return $projects[$pname];
+    }
+
+    $project = [
+      "composer" => $composer,
+      "name" => $pname,
+      "requires" => [],
+      "branches" => [],
+      "dir" => realpath($dir),
+    ];
+    $requires = $composer->geta("require");
+    if ($requires !== null) {
+      foreach ($requires as $dep => $version) {
+        # ignorer les projets qui n'ont pas le préfixe requis
+        $include_project = false;
+        foreach (ConfigFile::PREFIXES as $prefix) {
+          if (substr($dep, 0, strlen($prefix)) === $prefix) {
+            $include_project = true;
+            break;
+          }
+        }
+        if (!$include_project) continue;
+        # sinon, ajouter le projet aux dépendances
+        $project["requires"][] = $dep;
+        if (!array_key_exists($dep, $projects)) {
+          $projects[$dep] = null;
+          $new_projects[$dep] = true;
+        }
+        if (substr($version, 0, 4) === "dev-") {
+          $project["branches"][$dep] = substr($version, 4);
+        } else {
+          $project["branches"][$dep] = $version;
+        }
+      }
+    }
+    $projects[$pname] = $project;
+    return $project;
+  }
+
+  static function build_projects(array $project_dirs, ?string &$projects_dir): array {
+    $projects = [];
+    foreach ($project_dirs as $project_dir) {
+      if ($projects_dir === null) $projects_dir = dirname($project_dir);
+      # analyser le projet initial
+      $new_projects = [];
+      if (self::parse_project($project_dir, $projects, $new_projects) === null) {
+        continue;
+      }
+      # puis analyser récursivement tous les projets dépendants
+      while (true) {
+        $have_new = false;
+        foreach ($new_projects as $name => &$new) {
+          if ($new) {
+            $new = false;
+            $have_new = true;
+            $project_dir = self::get_project_dir($name, $projects_dir);
+            self::parse_project($project_dir, $projects, $new_projects);
+          }
+        }; unset($new);
+        if (!$have_new) break;
+      }
+    }
+    return $projects;
+  }
+
+  static function order_deps(?array $deps, array $projects): array {
+    if ($deps === null) $deps = array_keys($projects);
+    $pi = 0;
+    $max = count($deps);
+    while ($pi < $max) {
+      $modified = false;
+      $project = $projects[$deps[$pi]];
+      if ($project !== null) {
+        # dépendance dont on a trouvé la correspondance sur disque
+        foreach ($project["requires"] as $dep) {
+          $di = array_search($dep, $deps);
+          if ($di > $pi) {
+            # si la dépendance se situe après le projet, la placer avant
+            $deps = array_splice($deps, $di, 1);
+            $deps = array_splice($deps, $pi, 0, [$dep]);
+            $modified = true;
+          }
+        }
+      }
+      if (!$modified) $pi++;
+    }
+    return $deps;
+  }
+}
diff --git a/nur_src/tools/compctl/ConfigFile.php b/nur_src/tools/compctl/ConfigFile.php
index 1e47aae..a822ff2 100644
--- a/nur_src/tools/compctl/ConfigFile.php
+++ b/nur_src/tools/compctl/ConfigFile.php
@@ -10,6 +10,9 @@ use nur\str;
 use nur\yaml;
 
 class ConfigFile {
+  # préfixes de projets dont on tient compte
+  const PREFIXES = ["ur/", "nur/", "lib/", "nulib/"];
+
   const DEFAULT_DEP = "dev-master";
   const DEFAULT_DEPS = [
     "wip" => "dev-wip",