4 files changed, 26 insertions, 3 deletions

diff --git a/src/luarocks/build.lua b/src/luarocks/build.lua
index ec269023..72b5649e 100644
--- a/src/luarocks/build.lua
+++ b/src/luarocks/build.lua
@@ -31,7 +31,8 @@ or the name of a rock to be fetched from a repository.
                     rock after building a new one. This behavior can
                     be made permanent by setting keep_other_versions=true
                     in the configuration file.
-]]
+
+]]..util.deps_mode_help()
 
 --- Install files to a given location.
 -- Takes a table where the array part is a list of filenames to be copied.
diff --git a/src/luarocks/install.lua b/src/luarocks/install.lua
index b28e6282..7458ec8e 100644
--- a/src/luarocks/install.lua
+++ b/src/luarocks/install.lua
@@ -25,7 +25,8 @@ or a filename of a locally available rock.
                     rock after installing a new one. This behavior can
                     be made permanent by setting keep_other_versions=true
                     in the configuration file.
-]]
+]]..util.deps_mode_help()
+
 
 --- Install a binary rock.
 -- @param rock_file string: local or remote filename of a rock.
diff --git a/src/luarocks/remove.lua b/src/luarocks/remove.lua
index f2f6997b..8f751a93 100644
--- a/src/luarocks/remove.lua
+++ b/src/luarocks/remove.lua
@@ -22,7 +22,8 @@ Will only perform the removal if it does not break dependencies.
 To override this check and force the removal, use --force.
 To perform a forced removal without reporting dependency issues,
 use --force=fast.
-]]
+
+]]..util.deps_mode_help()
 
 --- Obtain a list of packages that depend on the given set of packages
 -- (where all packages of the set are versions of one program).
diff --git a/src/luarocks/util.lua b/src/luarocks/util.lua
index 1a60fd9c..4b138516 100644
--- a/src/luarocks/util.lua
+++ b/src/luarocks/util.lua
@@ -8,6 +8,8 @@ local global_env = _G
 
 module("luarocks.util", package.seeall)
 
+local cfg = require("luarocks.cfg")
+
 local scheduled_functions = {}
 local debug = require("debug")
 
@@ -371,6 +373,24 @@ function this_program(default)
    return last:sub(2)
 end
 
+function deps_mode_help(program)
+   return [[
+--deps-mode=<mode>  How to handle dependencies. Four modes are supported:
+                    * all - use all trees from the rocks_trees list
+                      for finding dependencies
+                    * one - use only the current tree (possibly set
+                      with --tree)
+                    * order - use trees based on order (use the current
+                      tree and all trees below it on the rocks_trees list)
+                    * none - ignore dependencies altogether.
+                    The default mode may be set with the deps_mode entry
+                    in the configuration file.
+                    The current default is "]]..cfg.deps_mode..[[".
+                    Type ']]..this_program(program or "luarocks")..[[' with no arguments to see
+                    your list of rocks trees.
+]]
+end
+
 function see_help(command, program)
    return "See '"..this_program(program or "luarocks")..' help '..command.."'."
 end