diff options
Diffstat (limited to 'overrides/buildGo/external')
| -rw-r--r-- | overrides/buildGo/external/default.nix | 95 | ||||
| -rw-r--r-- | overrides/buildGo/external/main.go | 186 |
2 files changed, 0 insertions, 281 deletions
diff --git a/overrides/buildGo/external/default.nix b/overrides/buildGo/external/default.nix deleted file mode 100644 index 48f678688e..0000000000 --- a/overrides/buildGo/external/default.nix +++ /dev/null @@ -1,95 +0,0 @@ -# Copyright 2019 Google LLC. -# SPDX-License-Identifier: Apache-2.0 -{ pkgs, program, package }: - -let - inherit (builtins) - elemAt - foldl' - fromJSON - head - length - listToAttrs - readFile - replaceStrings - tail - throw; - - inherit (pkgs) lib runCommand go jq ripgrep; - - pathToName = p: replaceStrings ["/"] ["_"] (toString p); - - # Collect all non-vendored dependencies from the Go standard library - # into a file that can be used to filter them out when processing - # dependencies. - stdlibPackages = runCommand "stdlib-pkgs.json" {} '' - export HOME=$PWD - export GOPATH=/dev/null - ${go}/bin/go list all | \ - ${ripgrep}/bin/rg -v 'vendor' | \ - ${jq}/bin/jq -R '.' | \ - ${jq}/bin/jq -c -s 'map({key: ., value: true}) | from_entries' \ - > $out - ''; - - analyser = program { - name = "analyser"; - - srcs = [ - ./main.go - ]; - - x_defs = { - "main.stdlibList" = "${stdlibPackages}"; - }; - }; - - mkset = path: value: - if path == [] then { gopkg = value; } - else { "${head path}" = mkset (tail path) value; }; - - last = l: elemAt l ((length l) - 1); - - toPackage = self: src: path: depMap: entry: - let - localDeps = map (d: lib.attrByPath (d ++ [ "gopkg" ]) ( - throw "missing local dependency '${lib.concatStringsSep "." d}' in '${path}'" - ) self) entry.localDeps; - - foreignDeps = map (d: lib.attrByPath [ d ] ( - throw "missing foreign dependency '${d}' in '${path}'" - ) depMap) entry.foreignDeps; - - args = { - srcs = map (f: src + ("/" + f)) entry.files; - deps = localDeps ++ foreignDeps; - }; - - libArgs = args // { - name = pathToName entry.name; - path = lib.concatStringsSep "/" ([ path ] ++ entry.locator); - sfiles = map (f: src + ("/" + f)) entry.sfiles; - }; - - binArgs = args // { - name = (last ((lib.splitString "/" path) ++ entry.locator)); - }; - in if entry.isCommand then (program binArgs) else (package libArgs); - -in { src, path, deps ? [] }: let - # Build a map of dependencies (from their import paths to their - # derivation) so that they can be conditionally imported only in - # sub-packages that require them. - depMap = listToAttrs (map (d: { - name = d.goImportPath; - value = d; - }) deps); - - name = pathToName path; - analysisOutput = runCommand "${name}-structure.json" {} '' - ${analyser}/bin/analyser -path ${path} -source ${src} > $out - ''; - analysis = fromJSON (readFile analysisOutput); -in lib.fix(self: foldl' lib.recursiveUpdate {} ( - map (entry: mkset entry.locator (toPackage self src path depMap entry)) analysis -)) diff --git a/overrides/buildGo/external/main.go b/overrides/buildGo/external/main.go deleted file mode 100644 index aa4a813d32..0000000000 --- a/overrides/buildGo/external/main.go +++ /dev/null @@ -1,186 +0,0 @@ -// Copyright 2019 Google LLC. -// SPDX-License-Identifier: Apache-2.0 - -// This tool analyses external (i.e. not built with `buildGo.nix`) Go -// packages to determine a build plan that Nix can import. -package main - -import ( - "encoding/json" - "flag" - "fmt" - "go/build" - "io/ioutil" - "log" - "os" - "path" - "path/filepath" - "strings" -) - -// Path to a JSON file describing all standard library import paths. -// This file is generated and set here by Nix during the build -// process. -var stdlibList string - -// pkg describes a single Go package within the specified source -// directory. -// -// Return information includes the local (relative from project root) -// and external (none-stdlib) dependencies of this package. -type pkg struct { - Name string `json:"name"` - Locator []string `json:"locator"` - Files []string `json:"files"` - SFiles []string `json:"sfiles"` - LocalDeps [][]string `json:"localDeps"` - ForeignDeps []string `json:"foreignDeps"` - IsCommand bool `json:"isCommand"` -} - -// findGoDirs returns a filepath.WalkFunc that identifies all -// directories that contain Go source code in a certain tree. -func findGoDirs(at string) ([]string, error) { - dirSet := make(map[string]bool) - - err := filepath.Walk(at, func(path string, info os.FileInfo, err error) error { - name := info.Name() - // Skip folders that are guaranteed to not be relevant - if info.IsDir() && (name == "testdata" || name == ".git") { - return filepath.SkipDir - } - - // If the current file is a Go file, then the directory is popped - // (i.e. marked as a Go directory). - if !info.IsDir() && strings.HasSuffix(name, ".go") && !strings.HasSuffix(name, "_test.go") { - dirSet[filepath.Dir(path)] = true - } - - return nil - }) - - if err != nil { - return nil, err - } - - goDirs := []string{} - for k, _ := range dirSet { - goDirs = append(goDirs, k) - } - - return goDirs, nil -} - -// analysePackage loads and analyses the imports of a single Go -// package, returning the data that is required by the Nix code to -// generate a derivation for this package. -func analysePackage(root, source, importpath string, stdlib map[string]bool) (pkg, error) { - ctx := build.Default - ctx.CgoEnabled = false - - p, err := ctx.ImportDir(source, build.IgnoreVendor) - if err != nil { - return pkg{}, err - } - - local := [][]string{} - foreign := []string{} - - for _, i := range p.Imports { - if stdlib[i] { - continue - } - - if i == importpath { - local = append(local, []string{}) - } else if strings.HasPrefix(i, importpath) { - local = append(local, strings.Split(strings.TrimPrefix(i, importpath+"/"), "/")) - } else { - foreign = append(foreign, i) - } - } - - prefix := strings.TrimPrefix(source, root+"/") - - locator := []string{} - if len(prefix) != len(source) { - locator = strings.Split(prefix, "/") - } else { - // Otherwise, the locator is empty since its the root package and - // no prefix should be added to files. - prefix = "" - } - - files := []string{} - for _, f := range p.GoFiles { - files = append(files, path.Join(prefix, f)) - } - - sfiles := []string{} - for _, f := range p.SFiles { - sfiles = append(sfiles, path.Join(prefix, f)) - } - - return pkg{ - Name: path.Join(importpath, prefix), - Locator: locator, - Files: files, - SFiles: sfiles, - LocalDeps: local, - ForeignDeps: foreign, - IsCommand: p.IsCommand(), - }, nil -} - -func loadStdlibPkgs(from string) (pkgs map[string]bool, err error) { - f, err := ioutil.ReadFile(from) - if err != nil { - return - } - - err = json.Unmarshal(f, &pkgs) - return -} - -func main() { - source := flag.String("source", "", "path to directory with sources to process") - path := flag.String("path", "", "import path for the package") - - flag.Parse() - - if *source == "" { - log.Fatalf("-source flag must be specified") - } - - stdlibPkgs, err := loadStdlibPkgs(stdlibList) - if err != nil { - log.Fatalf("failed to load standard library index from %q: %s\n", stdlibList, err) - } - - goDirs, err := findGoDirs(*source) - if err != nil { - log.Fatalf("failed to walk source directory '%s': %s\n", source, err) - } - - all := []pkg{} - for _, d := range goDirs { - analysed, err := analysePackage(*source, d, *path, stdlibPkgs) - - // If the Go source analysis returned "no buildable Go files", - // that directory should be skipped. - // - // This might be due to `+build` flags on the platform and other - // reasons (such as test files). - if _, ok := err.(*build.NoGoError); ok { - continue - } - - if err != nil { - log.Fatalf("failed to analyse package at %q: %s", d, err) - } - all = append(all, analysed) - } - - j, _ := json.Marshal(all) - fmt.Println(string(j)) -} |