aboutsummaryrefslogtreecommitdiff
path: root/pkgs/nodejs-sass/node-env.nix
blob: fc118a788ea7f38051cf97de89bb212036d91420 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
# This file originates from node2nix

{stdenv, nodejs, python2, utillinux, libtool, runCommand, writeTextFile}:

let
  python = if nodejs ? python then nodejs.python else python2;

  # Create a tar wrapper that filters all the 'Ignoring unknown extended header keyword' noise
  tarWrapper = runCommand "tarWrapper" {} ''
    mkdir -p $out/bin

    cat > $out/bin/tar <<EOF
    #! ${stdenv.shell} -e
    $(type -p tar) "\$@" --warning=no-unknown-keyword
    EOF

    chmod +x $out/bin/tar
  '';

  # Function that generates a TGZ file from a NPM project
  buildNodeSourceDist =
    { name, version, src, ... }:

    stdenv.mkDerivation {
      name = "node-tarball-${name}-${version}";
      inherit src;
      buildInputs = [ nodejs ];
      buildPhase = ''
        export HOME=$TMPDIR
        tgzFile=$(npm pack)
      '';
      installPhase = ''
        mkdir -p $out/tarballs
        mv $tgzFile $out/tarballs
        mkdir -p $out/nix-support
        echo "file source-dist $out/tarballs/$tgzFile" >> $out/nix-support/hydra-build-products
      '';
    };

  includeDependencies = {dependencies}:
    stdenv.lib.optionalString (dependencies != [])
      (stdenv.lib.concatMapStrings (dependency:
        ''
          # Bundle the dependencies of the package
          mkdir -p node_modules
          cd node_modules

          # Only include dependencies if they don't exist. They may also be bundled in the package.
          if [ ! -e "${dependency.name}" ]
          then
              ${composePackage dependency}
          fi

          cd ..
        ''
      ) dependencies);

  # Recursively composes the dependencies of a package
  composePackage = { name, packageName, src, dependencies ? [], ... }@args:
    ''
      DIR=$(pwd)
      cd $TMPDIR

      unpackFile ${src}

      # Make the base dir in which the target dependency resides first
      mkdir -p "$(dirname "$DIR/${packageName}")"

      if [ -f "${src}" ]
      then
          # Figure out what directory has been unpacked
          packageDir="$(find . -maxdepth 1 -type d | tail -1)"

          # Restore write permissions to make building work
          find "$packageDir" -type d -print0 | xargs -0 chmod u+x
          chmod -R u+w "$packageDir"

          # Move the extracted tarball into the output folder
          mv "$packageDir" "$DIR/${packageName}"
      elif [ -d "${src}" ]
      then
          # Get a stripped name (without hash) of the source directory.
          # On old nixpkgs it's already set internally.
          if [ -z "$strippedName" ]
          then
              strippedName="$(stripHash ${src})"
          fi

          # Restore write permissions to make building work
          chmod -R u+w "$strippedName"

          # Move the extracted directory into the output folder
          mv "$strippedName" "$DIR/${packageName}"
      fi

      # Unset the stripped name to not confuse the next unpack step
      unset strippedName

      # Include the dependencies of the package
      cd "$DIR/${packageName}"
      ${includeDependencies { inherit dependencies; }}
      cd ..
      ${stdenv.lib.optionalString (builtins.substring 0 1 packageName == "@") "cd .."}
    '';

  pinpointDependencies = {dependencies, production}:
    let
      pinpointDependenciesFromPackageJSON = writeTextFile {
        name = "pinpointDependencies.js";
        text = ''
          var fs = require('fs');
          var path = require('path');

          function resolveDependencyVersion(location, name) {
              if(location == process.env['NIX_STORE']) {
                  return null;
              } else {
                  var dependencyPackageJSON = path.join(location, "node_modules", name, "package.json");

                  if(fs.existsSync(dependencyPackageJSON)) {
                      var dependencyPackageObj = JSON.parse(fs.readFileSync(dependencyPackageJSON));

                      if(dependencyPackageObj.name == name) {
                          return dependencyPackageObj.version;
                      }
                  } else {
                      return resolveDependencyVersion(path.resolve(location, ".."), name);
                  }
              }
          }

          function replaceDependencies(dependencies) {
              if(typeof dependencies == "object" && dependencies !== null) {
                  for(var dependency in dependencies) {
                      var resolvedVersion = resolveDependencyVersion(process.cwd(), dependency);

                      if(resolvedVersion === null) {
                          process.stderr.write("WARNING: cannot pinpoint dependency: "+dependency+", context: "+process.cwd()+"\n");
                      } else {
                          dependencies[dependency] = resolvedVersion;
                      }
                  }
              }
          }

          /* Read the package.json configuration */
          var packageObj = JSON.parse(fs.readFileSync('./package.json'));

          /* Pinpoint all dependencies */
          replaceDependencies(packageObj.dependencies);
          if(process.argv[2] == "development") {
              replaceDependencies(packageObj.devDependencies);
          }
          replaceDependencies(packageObj.optionalDependencies);

          /* Write the fixed package.json file */
          fs.writeFileSync("package.json", JSON.stringify(packageObj, null, 2));
        '';
      };
    in
    ''
      node ${pinpointDependenciesFromPackageJSON} ${if production then "production" else "development"}

      ${stdenv.lib.optionalString (dependencies != [])
        ''
          if [ -d node_modules ]
          then
              cd node_modules
              ${stdenv.lib.concatMapStrings (dependency: pinpointDependenciesOfPackage dependency) dependencies}
              cd ..
          fi
        ''}
    '';

  # Recursively traverses all dependencies of a package and pinpoints all
  # dependencies in the package.json file to the versions that are actually
  # being used.

  pinpointDependenciesOfPackage = { packageName, dependencies ? [], production ? true, ... }@args:
    ''
      if [ -d "${packageName}" ]
      then
          cd "${packageName}"
          ${pinpointDependencies { inherit dependencies production; }}
          cd ..
          ${stdenv.lib.optionalString (builtins.substring 0 1 packageName == "@") "cd .."}
      fi
    '';

  # Extract the Node.js source code which is used to compile packages with
  # native bindings
  nodeSources = runCommand "node-sources" {} ''
    tar --no-same-owner --no-same-permissions -xf ${nodejs.src}
    mv node-* $out
  '';

  # Script that adds _integrity fields to all package.json files to prevent NPM from consulting the cache (that is empty)
  addIntegrityFieldsScript = writeTextFile {
    name = "addintegrityfields.js";
    text = ''
      var fs = require('fs');
      var path = require('path');

      function augmentDependencies(baseDir, dependencies) {
          for(var dependencyName in dependencies) {
              var dependency = dependencies[dependencyName];

              // Open package.json and augment metadata fields
              var packageJSONDir = path.join(baseDir, "node_modules", dependencyName);
              var packageJSONPath = path.join(packageJSONDir, "package.json");

              if(fs.existsSync(packageJSONPath)) { // Only augment packages that exist. Sometimes we may have production installs in which development dependencies can be ignored
                  console.log("Adding metadata fields to: "+packageJSONPath);
                  var packageObj = JSON.parse(fs.readFileSync(packageJSONPath));

                  if(dependency.integrity) {
                      packageObj["_integrity"] = dependency.integrity;
                  } else {
                      packageObj["_integrity"] = "sha1-000000000000000000000000000="; // When no _integrity string has been provided (e.g. by Git dependencies), add a dummy one. It does not seem to harm and it bypasses downloads.
                  }

                  packageObj["_resolved"] = dependency.version; // Set the resolved version to the version identifier. This prevents NPM from cloning Git repositories.
                  fs.writeFileSync(packageJSONPath, JSON.stringify(packageObj, null, 2));
              }

              // Augment transitive dependencies
              if(dependency.dependencies !== undefined) {
                  augmentDependencies(packageJSONDir, dependency.dependencies);
              }
          }
      }

      if(fs.existsSync("./package-lock.json")) {
          var packageLock = JSON.parse(fs.readFileSync("./package-lock.json"));

          if(packageLock.lockfileVersion !== 1) {
             process.stderr.write("Sorry, I only understand lock file version 1!\n");
             process.exit(1);
          }

          if(packageLock.dependencies !== undefined) {
              augmentDependencies(".", packageLock.dependencies);
          }
      }
    '';
  };

  # Reconstructs a package-lock file from the node_modules/ folder structure and package.json files with dummy sha1 hashes
  reconstructPackageLock = writeTextFile {
    name = "addintegrityfields.js";
    text = ''
      var fs = require('fs');
      var path = require('path');

      var packageObj = JSON.parse(fs.readFileSync("package.json"));

      var lockObj = {
          name: packageObj.name,
          version: packageObj.version,
          lockfileVersion: 1,
          requires: true,
          dependencies: {}
      };

      function augmentPackageJSON(filePath, dependencies) {
          var packageJSON = path.join(filePath, "package.json");
          if(fs.existsSync(packageJSON)) {
              var packageObj = JSON.parse(fs.readFileSync(packageJSON));
              dependencies[packageObj.name] = {
                  version: packageObj.version,
                  integrity: "sha1-000000000000000000000000000=",
                  dependencies: {}
              };
              processDependencies(path.join(filePath, "node_modules"), dependencies[packageObj.name].dependencies);
          }
      }

      function processDependencies(dir, dependencies) {
          if(fs.existsSync(dir)) {
              var files = fs.readdirSync(dir);

              files.forEach(function(entry) {
                  var filePath = path.join(dir, entry);
                  var stats = fs.statSync(filePath);

                  if(stats.isDirectory()) {
                      if(entry.substr(0, 1) == "@") {
                          // When we encounter a namespace folder, augment all packages belonging to the scope
                          var pkgFiles = fs.readdirSync(filePath);

                          pkgFiles.forEach(function(entry) {
                              if(stats.isDirectory()) {
                                  var pkgFilePath = path.join(filePath, entry);
                                  augmentPackageJSON(pkgFilePath, dependencies);
                              }
                          });
                      } else {
                          augmentPackageJSON(filePath, dependencies);
                      }
                  }
              });
          }
      }

      processDependencies("node_modules", lockObj.dependencies);

      fs.writeFileSync("package-lock.json", JSON.stringify(lockObj, null, 2));
    '';
  };

  # Builds and composes an NPM package including all its dependencies
  buildNodePackage = { name, packageName, version, dependencies ? [], production ? true, npmFlags ? "", dontNpmInstall ? false, bypassCache ? false, preRebuild ? "", ... }@args:

    let
      forceOfflineFlag = if bypassCache then "--offline" else "--registry http://www.example.com";
    in
    stdenv.lib.makeOverridable stdenv.mkDerivation (builtins.removeAttrs args [ "dependencies" ] // {
      name = "node-${name}-${version}";
      buildInputs = [ tarWrapper python nodejs ]
        ++ stdenv.lib.optional (stdenv.isLinux) utillinux
        ++ stdenv.lib.optional (stdenv.isDarwin) libtool
        ++ args.buildInputs or [];
      dontStrip = args.dontStrip or true; # Striping may fail a build for some package deployments

      inherit dontNpmInstall preRebuild;

      unpackPhase = args.unpackPhase or "true";

      buildPhase = args.buildPhase or "true";

      compositionScript = composePackage args;
      pinpointDependenciesScript = pinpointDependenciesOfPackage args;

      passAsFile = [ "compositionScript" "pinpointDependenciesScript" ];

      installPhase = args.installPhase or ''
        # Create and enter a root node_modules/ folder
        mkdir -p $out/lib/node_modules
        cd $out/lib/node_modules

        # Compose the package and all its dependencies
        source $compositionScriptPath

        # Pinpoint the versions of all dependencies to the ones that are actually being used
        echo "pinpointing versions of dependencies..."
        source $pinpointDependenciesScriptPath

        # Patch the shebangs of the bundled modules to prevent them from
        # calling executables outside the Nix store as much as possible
        patchShebangs .

        # Deploy the Node.js package by running npm install. Since the
        # dependencies have been provided already by ourselves, it should not
        # attempt to install them again, which is good, because we want to make
        # it Nix's responsibility. If it needs to install any dependencies
        # anyway (e.g. because the dependency parameters are
        # incomplete/incorrect), it fails.
        #
        # The other responsibilities of NPM are kept -- version checks, build
        # steps, postprocessing etc.

        export HOME=$TMPDIR
        cd "${packageName}"
        runHook preRebuild

        ${stdenv.lib.optionalString bypassCache ''
          if [ ! -f package-lock.json ]
          then
              echo "No package-lock.json file found, reconstructing..."
              node ${reconstructPackageLock}
          fi

          node ${addIntegrityFieldsScript}
        ''}

        npm ${forceOfflineFlag} --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} rebuild

        if [ "$dontNpmInstall" != "1" ]
        then
            # NPM tries to download packages even when they already exist if npm-shrinkwrap is used.
            rm -f npm-shrinkwrap.json

            npm ${forceOfflineFlag} --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} install
        fi

        # Create symlink to the deployed executable folder, if applicable
        if [ -d "$out/lib/node_modules/.bin" ]
        then
            ln -s $out/lib/node_modules/.bin $out/bin
        fi

        # Create symlinks to the deployed manual page folders, if applicable
        if [ -d "$out/lib/node_modules/${packageName}/man" ]
        then
            mkdir -p $out/share
            for dir in "$out/lib/node_modules/${packageName}/man/"*
            do
                mkdir -p $out/share/man/$(basename "$dir")
                for page in "$dir"/*
                do
                    ln -s $page $out/share/man/$(basename "$dir")
                done
            done
        fi

        # Run post install hook, if provided
        runHook postInstall
      '';
    });

  # Builds a development shell
  buildNodeShell = { name, packageName, version, src, dependencies ? [], production ? true, npmFlags ? "", dontNpmInstall ? false, bypassCache ? false, ... }@args:
    let
      forceOfflineFlag = if bypassCache then "--offline" else "--registry http://www.example.com";

      nodeDependencies = stdenv.mkDerivation {
        name = "node-dependencies-${name}-${version}";

        buildInputs = [ tarWrapper python nodejs ]
          ++ stdenv.lib.optional (stdenv.isLinux) utillinux
          ++ stdenv.lib.optional (stdenv.isDarwin) libtool
          ++ args.buildInputs or [];

        includeScript = includeDependencies { inherit dependencies; };
        pinpointDependenciesScript = pinpointDependenciesOfPackage args;

        passAsFile = [ "includeScript" "pinpointDependenciesScript" ];

        buildCommand = ''
          mkdir -p $out/${packageName}
          cd $out/${packageName}

          source $includeScriptPath

          # Create fake package.json to make the npm commands work properly
          cp ${src}/package.json .
          chmod 644 package.json
          ${stdenv.lib.optionalString bypassCache ''
            if [ -f ${src}/package-lock.json ]
            then
              cp ${src}/package-lock.json .
            fi
          ''}

          # Pinpoint the versions of all dependencies to the ones that are actually being used
          echo "pinpointing versions of dependencies..."
          cd ..
          source $pinpointDependenciesScriptPath
          cd ${packageName}

          # Patch the shebangs of the bundled modules to prevent them from
          # calling executables outside the Nix store as much as possible
          patchShebangs .

          export HOME=$PWD

          ${stdenv.lib.optionalString bypassCache ''
            if [ ! -f package-lock.json ]
            then
                echo "No package-lock.json file found, reconstructing..."
                node ${reconstructPackageLock}
            fi

            node ${addIntegrityFieldsScript}
          ''}

          npm ${forceOfflineFlag} --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} rebuild

          ${stdenv.lib.optionalString (!dontNpmInstall) ''
            # NPM tries to download packages even when they already exist if npm-shrinkwrap is used.
            rm -f npm-shrinkwrap.json

            npm ${forceOfflineFlag} --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} install
          ''}

          cd ..
          mv ${packageName} lib
          ln -s $out/lib/node_modules/.bin $out/bin
        '';
      };
    in
    stdenv.lib.makeOverridable stdenv.mkDerivation {
      name = "node-shell-${name}-${version}";

      buildInputs = [ python nodejs ] ++ stdenv.lib.optional (stdenv.isLinux) utillinux ++ args.buildInputs or [];
      buildCommand = ''
        mkdir -p $out/bin
        cat > $out/bin/shell <<EOF
        #! ${stdenv.shell} -e
        $shellHook
        exec ${stdenv.shell}
        EOF
        chmod +x $out/bin/shell
      '';

      # Provide the dependencies in a development shell through the NODE_PATH environment variable
      inherit nodeDependencies;
      shellHook = stdenv.lib.optionalString (dependencies != []) ''
        export NODE_PATH=$nodeDependencies/lib/node_modules
      '';
    };
in
{ inherit buildNodeSourceDist buildNodePackage buildNodeShell; }