diff options
Diffstat (limited to 'nix/readTree/default.nix')
| -rw-r--r-- | nix/readTree/default.nix | 139 |
1 files changed, 77 insertions, 62 deletions
diff --git a/nix/readTree/default.nix b/nix/readTree/default.nix index 259f2f2fbf..0c59c890d4 100644 --- a/nix/readTree/default.nix +++ b/nix/readTree/default.nix @@ -43,10 +43,13 @@ let children = readDir path; isVisible = f: f == ".skip-subtree" || (substring 0 1 f) != "."; names = filter isVisible (attrNames children); - in listToAttrs (map (name: { - inherit name; - value = children.${name}; - }) names); + in + listToAttrs (map + (name: { + inherit name; + value = children.${name}; + }) + names); # Create a mark containing the location of this attribute and # a list of all child attribute names added by readTree. @@ -57,12 +60,13 @@ let # Import a file and enforce our calling convention importFile = args: scopedArgs: path: parts: filter: - let - importedFile = if scopedArgs != {} - then builtins.scopedImport scopedArgs path - else import path; + let + importedFile = + if scopedArgs != { } + then builtins.scopedImport scopedArgs path + else import path; pathType = builtins.typeOf importedFile; - in + in if pathType != "lambda" then builtins.throw "readTree: trying to import ${toString path}, but it’s a ${pathType}, you need to make it a function like { depot, pkgs, ... }" else importedFile (filter parts (argsWithPath args parts)); @@ -76,8 +80,9 @@ let dir = readDirVisible initPath; joinChild = c: initPath + ("/" + c); - self = if rootDir - then { __readTree = []; } + self = + if rootDir + then { __readTree = [ ]; } else importFile args scopedArgs initPath parts argsFilter; # Import subdirectories of the current one, unless the special @@ -88,33 +93,41 @@ let # should be ignored, but its content is not inspected by # readTree filterDir = f: dir."${f}" == "directory"; - children = if hasAttr ".skip-subtree" dir then [] else map (c: { - name = c; - value = readTree { - inherit argsFilter scopedArgs; - args = args; - initPath = (joinChild c); - rootDir = false; - parts = (parts ++ [ c ]); - }; - }) (filter filterDir (attrNames dir)); + children = if hasAttr ".skip-subtree" dir then [ ] else + map + (c: { + name = c; + value = readTree { + inherit argsFilter scopedArgs; + args = args; + initPath = (joinChild c); + rootDir = false; + parts = (parts ++ [ c ]); + }; + }) + (filter filterDir (attrNames dir)); # Import Nix files - nixFiles = if hasAttr ".skip-subtree" dir then [] + nixFiles = + if hasAttr ".skip-subtree" dir then [ ] else filter (f: f != null) (map nixFileName (attrNames dir)); - nixChildren = map (c: let - p = joinChild (c + ".nix"); - childParts = parts ++ [ c ]; - imported = importFile args scopedArgs p childParts argsFilter; - in { - name = c; - value = - if isAttrs imported - then imported // marker childParts {} - else imported; - }) nixFiles; - - nodeValue = if dir ? "default.nix" then self else {}; + nixChildren = map + (c: + let + p = joinChild (c + ".nix"); + childParts = parts ++ [ c ]; + imported = importFile args scopedArgs p childParts argsFilter; + in + { + name = c; + value = + if isAttrs imported + then imported // marker childParts { } + else imported; + }) + nixFiles; + + nodeValue = if dir ? "default.nix" then self else { }; allChildren = listToAttrs ( if dir ? "default.nix" @@ -123,9 +136,9 @@ let ); in - if isAttrs nodeValue - then nodeValue // allChildren // (marker parts allChildren) - else nodeValue; + if isAttrs nodeValue + then nodeValue // allChildren // (marker parts allChildren) + else nodeValue; # Function which can be used to find all readTree targets within an # attribute set. @@ -143,40 +156,42 @@ let # should be included in the build. gather = eligible: node: if node ? __readTree then - # Include the node itself if it is eligible. - (if eligible node then [ node ] else []) + # Include the node itself if it is eligible. + (if eligible node then [ node ] else [ ]) # Include eligible children of the node ++ concatMap (gather eligible) (map (attr: node."${attr}") node.__readTreeChildren) # Include specified sub-targets of the node ++ filter eligible (map - (k: (node."${k}" or {}) // { - # Keep the same tree location, but explicitly mark this - # node as a subtarget. - __readTree = node.__readTree; - __readTreeChildren = []; - __subtarget = k; - }) - (node.meta.targets or [])) - else []; + (k: (node."${k}" or { }) // { + # Keep the same tree location, but explicitly mark this + # node as a subtarget. + __readTree = node.__readTree; + __readTreeChildren = [ ]; + __subtarget = k; + }) + (node.meta.targets or [ ])) + else [ ]; # Determine whether a given value is a derivation. # Copied from nixpkgs/lib for cases where lib is not available yet. isDerivation = x: isAttrs x && x ? type && x.type == "derivation"; -in { +in +{ inherit gather; __functor = _: { path , args , filter ? (_parts: x: x) - , scopedArgs ? {} }: - readTree { - inherit args scopedArgs; - argsFilter = filter; - initPath = path; - rootDir = true; - parts = []; - }; + , scopedArgs ? { } + }: + readTree { + inherit args scopedArgs; + argsFilter = filter; + initPath = path; + rootDir = true; + parts = [ ]; + }; # In addition to readTree itself, some functionality is exposed that # is useful for users of readTree. @@ -193,7 +208,7 @@ in { # which should be able to access the restricted folder. # # reason: Textual explanation for the restriction (included in errors) - restrictFolder = { folder, exceptions ? [], reason }: parts: args: + restrictFolder = { folder, exceptions ? [ ], reason }: parts: args: if (elemAt parts 0) == folder || elem parts exceptions then args else args // { @@ -224,8 +239,8 @@ in { drvTargets = attrs: attrs // { meta = { targets = builtins.filter - (x: isDerivation attrs."${x}") - (builtins.attrNames attrs); - } // (attrs.meta or {}); + (x: isDerivation attrs."${x}") + (builtins.attrNames attrs); + } // (attrs.meta or { }); }; } |