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py_proto_library messes up sibling subpackage imports with generated proto source #1597

Description

@mikex-oss

🐞 bug report

Affected Rule

The issue is caused by the rule: py_proto_library

Is this a regression?

No, but did work in com_google_protobuf's py_proto_library rule (which we are trying to migrate from).

Description

Note: This seems somewhat related to #1551.

proto_library requires that the proto source be in the same package as the target. If we need to depend on an external repo's .proto file and create our own proto_library + py_proto_library targets, the workaround is to use a genrule.

Something about the generated source triggers the "_virtual_imports", even though #1551 (comment) seems to indicate this means we are definitively dealing with strip_import_prefix.

Unlike with strip_import_prefix, in this case, prepending the _virtual_imports/<proto_library_name> to the path causes other normal Python libraries along the path to fail. It seems the _virtual_imports should not be triggered for generated sources at all (this was the case for com_google_protobuf's version) or the imports needs to be updated to properly handle this case.

In the repro below, the generated protobuf Python library is at: bazel-bin/my_project/proto/_virtual_imports/foo_proto/my_project/proto/foo_pb2.py.

sys.path contains <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>/my_project/proto/_virtual_imports/foo_proto before <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>.

But _virtual_imports/foo_proto/ replicates the repo hierarchy to the proto target, i.e. it contains my_project/proto. This means that imports of other packages under my_project are picked from the former path entry and fail.

🔬 Minimal Reproduction

my_project/proto/BUILD

genrule(
name = "generated_proto",
srcs = ["@external_repo//path/to:foo.proto"],
outs = ["foo.proto"],
cmd = "cp $< $@",
)
proto_library(
name = "foo_proto",
srcs = ["foo.proto"],
)
py_proto_library(
name = "foo_py_pb2",
deps = [":foo_proto"],
)
py_binary(
name = "proto_fail",
srcs = [
"proto_fail.py",
],
deps = [
"//my_project/api:bar,
":vertipro_py_pb2",
],
)

my_project/proto/proto_fail.py

from my_project.api import bar
from my_project.proto import foo_pb2

🔥 Exception or Error


$ bazel run //my_project/proto:proto_fail
bin/my_project/proto/proto_fail.runfiles/.../my_project/proto/proto_fail.py", line 1, in from my_project.api import bar
ModuleNotFoundError: No module named 'my_project.api'

🌍 Your Environment

Operating System:


Debian Linux 6.5.6-1

Output of bazel version:


bazel 6.4.0

Rules_python version:


rules_python-0.27.1

Anything else relevant?

Metadata

Metadata

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No one assigned

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    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

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      No branches or pull requests

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      py_proto_library messes up sibling subpackage imports with generated proto source · Issue #1597 · bazel-contrib/rules_python · GitHub
      Skip to content

      py_proto_library messes up sibling subpackage imports with generated proto source #1597

      Description

      @mikex-oss

      🐞 bug report

      Affected Rule

      The issue is caused by the rule: py_proto_library

      Is this a regression?

      No, but did work in com_google_protobuf's py_proto_library rule (which we are trying to migrate from).

      Description

      Note: This seems somewhat related to #1551.

      proto_library requires that the proto source be in the same package as the target. If we need to depend on an external repo's .proto file and create our own proto_library + py_proto_library targets, the workaround is to use a genrule.

      Something about the generated source triggers the "_virtual_imports", even though #1551 (comment) seems to indicate this means we are definitively dealing with strip_import_prefix.

      Unlike with strip_import_prefix, in this case, prepending the _virtual_imports/<proto_library_name> to the path causes other normal Python libraries along the path to fail. It seems the _virtual_imports should not be triggered for generated sources at all (this was the case for com_google_protobuf's version) or the imports needs to be updated to properly handle this case.

      In the repro below, the generated protobuf Python library is at: bazel-bin/my_project/proto/_virtual_imports/foo_proto/my_project/proto/foo_pb2.py.

      sys.path contains <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>/my_project/proto/_virtual_imports/foo_proto before <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>.

      But _virtual_imports/foo_proto/ replicates the repo hierarchy to the proto target, i.e. it contains my_project/proto. This means that imports of other packages under my_project are picked from the former path entry and fail.

      🔬 Minimal Reproduction

      my_project/proto/BUILD

      genrule(
      name = "generated_proto",
      srcs = ["@external_repo//path/to:foo.proto"],
      outs = ["foo.proto"],
      cmd = "cp $< $@",
      )
      proto_library(
      name = "foo_proto",
      srcs = ["foo.proto"],
      )
      py_proto_library(
      name = "foo_py_pb2",
      deps = [":foo_proto"],
      )
      py_binary(
      name = "proto_fail",
      srcs = [
      "proto_fail.py",
      ],
      deps = [
      "//my_project/api:bar,
      ":vertipro_py_pb2",
      ],
      )
      

      my_project/proto/proto_fail.py

      from my_project.api import bar
      from my_project.proto import foo_pb2
      

      🔥 Exception or Error

      
      $ bazel run //my_project/proto:proto_fail
      bin/my_project/proto/proto_fail.runfiles/.../my_project/proto/proto_fail.py", line 1, in from my_project.api import bar
      ModuleNotFoundError: No module named 'my_project.api'
      

      🌍 Your Environment

      Operating System:

      
      Debian Linux 6.5.6-1
      

      Output of bazel version:

      
      bazel 6.4.0
      

      Rules_python version:

      
      rules_python-0.27.1
      

      Anything else relevant?

      Metadata

      Metadata

      Assignees

      No one assigned

        Type

        No type

        Projects

        No projects

          Milestone

          No milestone

          Relationships

          None yet

          Development

          No branches or pull requests

          Issue actions

          , 'i'); if (__m === '*' || __re.test(location.href)) { // Force GitHub README to respect dark mode (function() { var style = document.createElement('style'); style.textContent = ' .markdown-body { color-scheme: dark light; } .markdown-body pre { background: #161b22 !important; } .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; } .markdown-body table th, .markdown-body table td { border-color: #30363d !important; } .markdown-body img { background: #0d1117; } .markdown-body blockquote { border-left-color: #8b949e; } .markdown-body hr { border-color: #30363d; } '; document.head.appendChild(style); })(); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' py_proto_library messes up sibling subpackage imports with generated proto source · Issue #1597 · bazel-contrib/rules_python · GitHub
          Skip to content

          py_proto_library messes up sibling subpackage imports with generated proto source #1597

          Description

          @mikex-oss

          🐞 bug report

          Affected Rule

          The issue is caused by the rule: py_proto_library

          Is this a regression?

          No, but did work in com_google_protobuf's py_proto_library rule (which we are trying to migrate from).

          Description

          Note: This seems somewhat related to #1551.

          proto_library requires that the proto source be in the same package as the target. If we need to depend on an external repo's .proto file and create our own proto_library + py_proto_library targets, the workaround is to use a genrule.

          Something about the generated source triggers the "_virtual_imports", even though #1551 (comment) seems to indicate this means we are definitively dealing with strip_import_prefix.

          Unlike with strip_import_prefix, in this case, prepending the _virtual_imports/<proto_library_name> to the path causes other normal Python libraries along the path to fail. It seems the _virtual_imports should not be triggered for generated sources at all (this was the case for com_google_protobuf's version) or the imports needs to be updated to properly handle this case.

          In the repro below, the generated protobuf Python library is at: bazel-bin/my_project/proto/_virtual_imports/foo_proto/my_project/proto/foo_pb2.py.

          sys.path contains <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>/my_project/proto/_virtual_imports/foo_proto before <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>.

          But _virtual_imports/foo_proto/ replicates the repo hierarchy to the proto target, i.e. it contains my_project/proto. This means that imports of other packages under my_project are picked from the former path entry and fail.

          🔬 Minimal Reproduction

          my_project/proto/BUILD

          genrule(
          name = "generated_proto",
          srcs = ["@external_repo//path/to:foo.proto"],
          outs = ["foo.proto"],
          cmd = "cp $< $@",
          )
          proto_library(
          name = "foo_proto",
          srcs = ["foo.proto"],
          )
          py_proto_library(
          name = "foo_py_pb2",
          deps = [":foo_proto"],
          )
          py_binary(
          name = "proto_fail",
          srcs = [
          "proto_fail.py",
          ],
          deps = [
          "//my_project/api:bar,
          ":vertipro_py_pb2",
          ],
          )
          

          my_project/proto/proto_fail.py

          from my_project.api import bar
          from my_project.proto import foo_pb2
          

          🔥 Exception or Error

          
          $ bazel run //my_project/proto:proto_fail
          bin/my_project/proto/proto_fail.runfiles/.../my_project/proto/proto_fail.py", line 1, in from my_project.api import bar
          ModuleNotFoundError: No module named 'my_project.api'
          

          🌍 Your Environment

          Operating System:

          
          Debian Linux 6.5.6-1
          

          Output of bazel version:

          
          bazel 6.4.0
          

          Rules_python version:

          
          rules_python-0.27.1
          

          Anything else relevant?

          Metadata

          Metadata

          Assignees

          No one assigned

            Type

            No type

            Projects

            No projects

              Milestone

              No milestone

              Relationships

              None yet

              Development

              No branches or pull requests

              Issue actions

              , 'i'); if (__m === '*' || __re.test(location.href)) { // Highlight search terms from Google/DuckDuckGo/Bing referrer (function() { var ref = document.referrer; var terms = []; if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) { var url = new URL(ref); var q = url.searchParams.get('q') || url.searchParams.get('p'); if (q) { terms = q.split(/\s+/).filter(function(t) { return t.length > 2; }); } } if (terms.length === 0) return; var style = document.createElement('style'); style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }'; document.head.appendChild(style); function highlight(node) { if (node.nodeType === 3) { // text node var text = node.textContent; var found = false; terms.forEach(function(term) { var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' py_proto_library messes up sibling subpackage imports with generated proto source · Issue #1597 · bazel-contrib/rules_python · GitHub
              Skip to content

              py_proto_library messes up sibling subpackage imports with generated proto source #1597

              Description

              @mikex-oss

              🐞 bug report

              Affected Rule

              The issue is caused by the rule: py_proto_library

              Is this a regression?

              No, but did work in com_google_protobuf's py_proto_library rule (which we are trying to migrate from).

              Description

              Note: This seems somewhat related to #1551.

              proto_library requires that the proto source be in the same package as the target. If we need to depend on an external repo's .proto file and create our own proto_library + py_proto_library targets, the workaround is to use a genrule.

              Something about the generated source triggers the "_virtual_imports", even though #1551 (comment) seems to indicate this means we are definitively dealing with strip_import_prefix.

              Unlike with strip_import_prefix, in this case, prepending the _virtual_imports/<proto_library_name> to the path causes other normal Python libraries along the path to fail. It seems the _virtual_imports should not be triggered for generated sources at all (this was the case for com_google_protobuf's version) or the imports needs to be updated to properly handle this case.

              In the repro below, the generated protobuf Python library is at: bazel-bin/my_project/proto/_virtual_imports/foo_proto/my_project/proto/foo_pb2.py.

              sys.path contains <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>/my_project/proto/_virtual_imports/foo_proto before <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>.

              But _virtual_imports/foo_proto/ replicates the repo hierarchy to the proto target, i.e. it contains my_project/proto. This means that imports of other packages under my_project are picked from the former path entry and fail.

              🔬 Minimal Reproduction

              my_project/proto/BUILD

              genrule(
              name = "generated_proto",
              srcs = ["@external_repo//path/to:foo.proto"],
              outs = ["foo.proto"],
              cmd = "cp $< $@",
              )
              proto_library(
              name = "foo_proto",
              srcs = ["foo.proto"],
              )
              py_proto_library(
              name = "foo_py_pb2",
              deps = [":foo_proto"],
              )
              py_binary(
              name = "proto_fail",
              srcs = [
              "proto_fail.py",
              ],
              deps = [
              "//my_project/api:bar,
              ":vertipro_py_pb2",
              ],
              )
              

              my_project/proto/proto_fail.py

              from my_project.api import bar
              from my_project.proto import foo_pb2
              

              🔥 Exception or Error

              
              $ bazel run //my_project/proto:proto_fail
              bin/my_project/proto/proto_fail.runfiles/.../my_project/proto/proto_fail.py", line 1, in from my_project.api import bar
              ModuleNotFoundError: No module named 'my_project.api'
              

              🌍 Your Environment

              Operating System:

              
              Debian Linux 6.5.6-1
              

              Output of bazel version:

              
              bazel 6.4.0
              

              Rules_python version:

              
              rules_python-0.27.1
              

              Anything else relevant?

              Metadata

              Metadata

              Assignees

              No one assigned

                Type

                No type

                Projects

                No projects

                  Milestone

                  No milestone

                  Relationships

                  None yet

                  Development

                  No branches or pull requests

                  Issue actions

                  , 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' py_proto_library messes up sibling subpackage imports with generated proto source · Issue #1597 · bazel-contrib/rules_python · GitHub
                  Skip to content

                  py_proto_library messes up sibling subpackage imports with generated proto source #1597

                  Description

                  @mikex-oss

                  🐞 bug report

                  Affected Rule

                  The issue is caused by the rule: py_proto_library

                  Is this a regression?

                  No, but did work in com_google_protobuf's py_proto_library rule (which we are trying to migrate from).

                  Description

                  Note: This seems somewhat related to #1551.

                  proto_library requires that the proto source be in the same package as the target. If we need to depend on an external repo's .proto file and create our own proto_library + py_proto_library targets, the workaround is to use a genrule.

                  Something about the generated source triggers the "_virtual_imports", even though #1551 (comment) seems to indicate this means we are definitively dealing with strip_import_prefix.

                  Unlike with strip_import_prefix, in this case, prepending the _virtual_imports/<proto_library_name> to the path causes other normal Python libraries along the path to fail. It seems the _virtual_imports should not be triggered for generated sources at all (this was the case for com_google_protobuf's version) or the imports needs to be updated to properly handle this case.

                  In the repro below, the generated protobuf Python library is at: bazel-bin/my_project/proto/_virtual_imports/foo_proto/my_project/proto/foo_pb2.py.

                  sys.path contains <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>/my_project/proto/_virtual_imports/foo_proto before <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>.

                  But _virtual_imports/foo_proto/ replicates the repo hierarchy to the proto target, i.e. it contains my_project/proto. This means that imports of other packages under my_project are picked from the former path entry and fail.

                  🔬 Minimal Reproduction

                  my_project/proto/BUILD

                  genrule(
                  name = "generated_proto",
                  srcs = ["@external_repo//path/to:foo.proto"],
                  outs = ["foo.proto"],
                  cmd = "cp $< $@",
                  )
                  proto_library(
                  name = "foo_proto",
                  srcs = ["foo.proto"],
                  )
                  py_proto_library(
                  name = "foo_py_pb2",
                  deps = [":foo_proto"],
                  )
                  py_binary(
                  name = "proto_fail",
                  srcs = [
                  "proto_fail.py",
                  ],
                  deps = [
                  "//my_project/api:bar,
                  ":vertipro_py_pb2",
                  ],
                  )
                  

                  my_project/proto/proto_fail.py

                  from my_project.api import bar
                  from my_project.proto import foo_pb2
                  

                  🔥 Exception or Error

                  
                  $ bazel run //my_project/proto:proto_fail
                  bin/my_project/proto/proto_fail.runfiles/.../my_project/proto/proto_fail.py", line 1, in from my_project.api import bar
                  ModuleNotFoundError: No module named 'my_project.api'
                  

                  🌍 Your Environment

                  Operating System:

                  
                  Debian Linux 6.5.6-1
                  

                  Output of bazel version:

                  
                  bazel 6.4.0
                  

                  Rules_python version:

                  
                  rules_python-0.27.1
                  

                  Anything else relevant?

                  Metadata

                  Metadata

                  Assignees

                  No one assigned

                    Type

                    No type

                    Projects

                    No projects

                      Milestone

                      No milestone

                      Relationships

                      None yet

                      Development

                      No branches or pull requests

                      Issue actions

                      , 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' py_proto_library messes up sibling subpackage imports with generated proto source · Issue #1597 · bazel-contrib/rules_python · GitHub
                      Skip to content

                      py_proto_library messes up sibling subpackage imports with generated proto source #1597

                      Description

                      @mikex-oss

                      🐞 bug report

                      Affected Rule

                      The issue is caused by the rule: py_proto_library

                      Is this a regression?

                      No, but did work in com_google_protobuf's py_proto_library rule (which we are trying to migrate from).

                      Description

                      Note: This seems somewhat related to #1551.

                      proto_library requires that the proto source be in the same package as the target. If we need to depend on an external repo's .proto file and create our own proto_library + py_proto_library targets, the workaround is to use a genrule.

                      Something about the generated source triggers the "_virtual_imports", even though #1551 (comment) seems to indicate this means we are definitively dealing with strip_import_prefix.

                      Unlike with strip_import_prefix, in this case, prepending the _virtual_imports/<proto_library_name> to the path causes other normal Python libraries along the path to fail. It seems the _virtual_imports should not be triggered for generated sources at all (this was the case for com_google_protobuf's version) or the imports needs to be updated to properly handle this case.

                      In the repro below, the generated protobuf Python library is at: bazel-bin/my_project/proto/_virtual_imports/foo_proto/my_project/proto/foo_pb2.py.

                      sys.path contains <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>/my_project/proto/_virtual_imports/foo_proto before <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>.

                      But _virtual_imports/foo_proto/ replicates the repo hierarchy to the proto target, i.e. it contains my_project/proto. This means that imports of other packages under my_project are picked from the former path entry and fail.

                      🔬 Minimal Reproduction

                      my_project/proto/BUILD

                      genrule(
                      name = "generated_proto",
                      srcs = ["@external_repo//path/to:foo.proto"],
                      outs = ["foo.proto"],
                      cmd = "cp $< $@",
                      )
                      proto_library(
                      name = "foo_proto",
                      srcs = ["foo.proto"],
                      )
                      py_proto_library(
                      name = "foo_py_pb2",
                      deps = [":foo_proto"],
                      )
                      py_binary(
                      name = "proto_fail",
                      srcs = [
                      "proto_fail.py",
                      ],
                      deps = [
                      "//my_project/api:bar,
                      ":vertipro_py_pb2",
                      ],
                      )
                      

                      my_project/proto/proto_fail.py

                      from my_project.api import bar
                      from my_project.proto import foo_pb2
                      

                      🔥 Exception or Error

                      
                      $ bazel run //my_project/proto:proto_fail
                      bin/my_project/proto/proto_fail.runfiles/.../my_project/proto/proto_fail.py", line 1, in from my_project.api import bar
                      ModuleNotFoundError: No module named 'my_project.api'
                      

                      🌍 Your Environment

                      Operating System:

                      
                      Debian Linux 6.5.6-1
                      

                      Output of bazel version:

                      
                      bazel 6.4.0
                      

                      Rules_python version:

                      
                      rules_python-0.27.1
                      

                      Anything else relevant?

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                          , 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' py_proto_library messes up sibling subpackage imports with generated proto source · Issue #1597 · bazel-contrib/rules_python · GitHub
                          Skip to content

                          py_proto_library messes up sibling subpackage imports with generated proto source #1597

                          Description

                          @mikex-oss

                          🐞 bug report

                          Affected Rule

                          The issue is caused by the rule: py_proto_library

                          Is this a regression?

                          No, but did work in com_google_protobuf's py_proto_library rule (which we are trying to migrate from).

                          Description

                          Note: This seems somewhat related to #1551.

                          proto_library requires that the proto source be in the same package as the target. If we need to depend on an external repo's .proto file and create our own proto_library + py_proto_library targets, the workaround is to use a genrule.

                          Something about the generated source triggers the "_virtual_imports", even though #1551 (comment) seems to indicate this means we are definitively dealing with strip_import_prefix.

                          Unlike with strip_import_prefix, in this case, prepending the _virtual_imports/<proto_library_name> to the path causes other normal Python libraries along the path to fail. It seems the _virtual_imports should not be triggered for generated sources at all (this was the case for com_google_protobuf's version) or the imports needs to be updated to properly handle this case.

                          In the repro below, the generated protobuf Python library is at: bazel-bin/my_project/proto/_virtual_imports/foo_proto/my_project/proto/foo_pb2.py.

                          sys.path contains <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>/my_project/proto/_virtual_imports/foo_proto before <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>.

                          But _virtual_imports/foo_proto/ replicates the repo hierarchy to the proto target, i.e. it contains my_project/proto. This means that imports of other packages under my_project are picked from the former path entry and fail.

                          🔬 Minimal Reproduction

                          my_project/proto/BUILD

                          genrule(
                          name = "generated_proto",
                          srcs = ["@external_repo//path/to:foo.proto"],
                          outs = ["foo.proto"],
                          cmd = "cp $< $@",
                          )
                          proto_library(
                          name = "foo_proto",
                          srcs = ["foo.proto"],
                          )
                          py_proto_library(
                          name = "foo_py_pb2",
                          deps = [":foo_proto"],
                          )
                          py_binary(
                          name = "proto_fail",
                          srcs = [
                          "proto_fail.py",
                          ],
                          deps = [
                          "//my_project/api:bar,
                          ":vertipro_py_pb2",
                          ],
                          )
                          

                          my_project/proto/proto_fail.py

                          from my_project.api import bar
                          from my_project.proto import foo_pb2
                          

                          🔥 Exception or Error

                          
                          $ bazel run //my_project/proto:proto_fail
                          bin/my_project/proto/proto_fail.runfiles/.../my_project/proto/proto_fail.py", line 1, in from my_project.api import bar
                          ModuleNotFoundError: No module named 'my_project.api'
                          

                          🌍 Your Environment

                          Operating System:

                          
                          Debian Linux 6.5.6-1
                          

                          Output of bazel version:

                          
                          bazel 6.4.0
                          

                          Rules_python version:

                          
                          rules_python-0.27.1
                          

                          Anything else relevant?

                          Metadata

                          Metadata

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                          No one assigned

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                            No type

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                            No projects

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                              No milestone

                              Relationships

                              None yet

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                              No branches or pull requests

                              Issue actions

                              , 'i'); if (__m === '*' || __re.test(location.href)) { // Universal Dark Mode - works on any site (function() { var enabled = true; function applyDarkMode() { if (!enabled) return; // Create style element if it doesn't exist var style = document.getElementById('universal-dark-mode-style'); if (!style) { style = document.createElement('style'); style.id = 'universal-dark-mode-style'; document.head.appendChild(style); } // Dark mode CSS - inverts colors but preserves images/video style.textContent = ' /* Invert everything except media */ html { filter: invert(1) hue-rotate(180deg) !important; background: #1a1a2e !important; } /* Restore images, videos, iframes, canvas */ img, video, iframe, canvas, svg, picture, [style*="background-image"] { filter: invert(1) hue-rotate(180deg) !important; } /* Preserve specific elements that should not be inverted */ .no-dark-mode, .no-dark-mode *, [data-theme="light"], [data-theme="light"], .ace_editor, .ace_editor *, .CodeMirror, .CodeMirror *, .monaco-editor, .monaco-editor *, .markdown-body pre, .markdown-body pre *, .highlight, .highlight *, pre code, pre code * { filter: none !important; } /* Fix common UI elements */ .modal, .popup, .dropdown-menu, .tooltip, .popover { filter: invert(1) hue-rotate(180deg) !important; background: #2d2d44 !important; border-color: #444 !important; } /* Scrollbars */ ::-webkit-scrollbar { background: #1a1a2e !important; } ::-webkit-scrollbar-thumb { background: #444 !important; } ::-webkit-scrollbar-thumb:hover { background: #555 !important; } /* Selection */ ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; } ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; } '; } function removeDarkMode() { var style = document.getElementById('universal-dark-mode-style'); if (style) style.remove(); } // Toggle with Alt+Shift+D document.addEventListener('keydown', function(e) { if (e.altKey && e.shiftKey && e.key === 'D') { e.preventDefault(); enabled = !enabled; if (enabled) { applyDarkMode(); console.log('[Universal Dark Mode] Enabled'); } else { removeDarkMode(); console.log('[Universal Dark Mode] Disabled'); } } }); // Apply on load applyDarkMode(); // Re-apply on dynamic content var observer = new MutationObserver(function(mutations) { if (enabled && !document.getElementById('universal-dark-mode-style')) { applyDarkMode(); } }); observer.observe(document.head, { childList: true }); console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle'); })(); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })(); py_proto_library messes up sibling subpackage imports with generated proto source · Issue #1597 · bazel-contrib/rules_python · GitHub
                              Skip to content

                              py_proto_library messes up sibling subpackage imports with generated proto source #1597

                              Description

                              @mikex-oss

                              🐞 bug report

                              Affected Rule

                              The issue is caused by the rule: py_proto_library

                              Is this a regression?

                              No, but did work in com_google_protobuf's py_proto_library rule (which we are trying to migrate from).

                              Description

                              Note: This seems somewhat related to #1551.

                              proto_library requires that the proto source be in the same package as the target. If we need to depend on an external repo's .proto file and create our own proto_library + py_proto_library targets, the workaround is to use a genrule.

                              Something about the generated source triggers the "_virtual_imports", even though #1551 (comment) seems to indicate this means we are definitively dealing with strip_import_prefix.

                              Unlike with strip_import_prefix, in this case, prepending the _virtual_imports/<proto_library_name> to the path causes other normal Python libraries along the path to fail. It seems the _virtual_imports should not be triggered for generated sources at all (this was the case for com_google_protobuf's version) or the imports needs to be updated to properly handle this case.

                              In the repro below, the generated protobuf Python library is at: bazel-bin/my_project/proto/_virtual_imports/foo_proto/my_project/proto/foo_pb2.py.

                              sys.path contains <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>/my_project/proto/_virtual_imports/foo_proto before <execroot>/.../bin/my_project/proto/proto_fail.runfiles/<workspace_name>.

                              But _virtual_imports/foo_proto/ replicates the repo hierarchy to the proto target, i.e. it contains my_project/proto. This means that imports of other packages under my_project are picked from the former path entry and fail.

                              🔬 Minimal Reproduction

                              my_project/proto/BUILD

                              genrule(
                              name = "generated_proto",
                              srcs = ["@external_repo//path/to:foo.proto"],
                              outs = ["foo.proto"],
                              cmd = "cp $< $@",
                              )
                              proto_library(
                              name = "foo_proto",
                              srcs = ["foo.proto"],
                              )
                              py_proto_library(
                              name = "foo_py_pb2",
                              deps = [":foo_proto"],
                              )
                              py_binary(
                              name = "proto_fail",
                              srcs = [
                              "proto_fail.py",
                              ],
                              deps = [
                              "//my_project/api:bar,
                              ":vertipro_py_pb2",
                              ],
                              )
                              

                              my_project/proto/proto_fail.py

                              from my_project.api import bar
                              from my_project.proto import foo_pb2
                              

                              🔥 Exception or Error

                              
                              $ bazel run //my_project/proto:proto_fail
                              bin/my_project/proto/proto_fail.runfiles/.../my_project/proto/proto_fail.py", line 1, in from my_project.api import bar
                              ModuleNotFoundError: No module named 'my_project.api'
                              

                              🌍 Your Environment

                              Operating System:

                              
                              Debian Linux 6.5.6-1
                              

                              Output of bazel version:

                              
                              bazel 6.4.0
                              

                              Rules_python version:

                              
                              rules_python-0.27.1
                              

                              Anything else relevant?

                              Metadata

                              Metadata

                              Assignees

                              No one assigned

                                Type

                                No type

                                Projects

                                No projects

                                  Milestone

                                  No milestone

                                  Relationships

                                  None yet

                                  Development

                                  No branches or pull requests

                                  Issue actions