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build, command, pip, constraints, install, dependent, issue, pep, file, mwchase, flit, dependencybleh, isolation, dependencies, dependency, constraintstxt, error, mentioned, sign, projects, version, output, installing, requirements, added, apljungquist, open, requests, isolated, behavior, create, project, processing, status, commented, workaround, ast, analysis, verified, pinning, navigation, pull, actions, security, respect, toplevel, populating, environments, description, environment,

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triage issues/prs pip install command build isolation projects installing backend dependencies primary pip command 1 python version support url constraints build system requirements isolated environment direct reference linking warn-script-location matching distribution found left open secure default behaviors comment metadata assignees activity ghost added full command output original command fails build dependencies apljungquist mentioned constraints files passed deliberately broke flit' ast analysis fails rethink pip' build isolation exit status 1 projects milestone 21 requests==2 local install build backends build wheel pep 517 processing pep 517 backend requirement dependency_bleh proper pinning /dependent processing ///absolute/path/ txt path/ complete output txt file uranusjr added bmw added constraints files ast analysis projects generated command command errored acceptable workaround constraints file runtime requirements

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DiscussionForumPosting:
      context:https://schema.org
      headline:Respect top-level "constraints" file when populating isolated build environments
      articleBody:**Environment** * pip version: 20.1.1 * Python version: 3.8.2 * OS: Linux <!-- Feel free to add more information about your environment here --> `pip freeze` output: ``` attrs==19.3.0 certifi==2020.4.5.2 chardet==3.0.4 docutils==0.16 flit==2.3.0 flit-core==2.3.0 idna==2.9 punq==0.4.1 pytoml==0.1.21 requests==2.23.0 urllib3==1.25.9 ``` **Description** <!-- A clear and concise description of what the bug is. --> Installing a package using a PEP 517 backend with build isolation enabled results in an `install_requirements` call using the return value of `backend.get_requires_for_build_wheel()`, which generates and runs a `pip install` command. Constraints files passed to the outermost `pip install` command are not reflected in the generated command. This means that, at least when using flit, a local install with build isolation will fail if it's relying on a constraints file to specify paths to dependencies that are only available locally. (The other build backends I checked don't require the runtime requirements in the isolated environment. I brought this up in the flit repo first in https://github.com/takluyver/flit/issues/354) **Expected behavior** <!-- A clear and concise description of what you expected to happen. --> Given two projects, a dependency and a dependent, with the dependent using flit, and the dependency not present in an index, the command `pip install -c path/to/constraints.txt path/to/dependent`, where the constraints file has a line like `name-of-dependency @ file:///absolute/path/to/dependency` should succeed. **How to Reproduce** <!-- Describe the steps to reproduce this bug. --> 1. Create a "dependency" project with a name not present in pypi 2. Create a "dependent" project that depends on the dependency, using flit 3. Create a `constraints.txt` file that at least contains a direct reference linking the name of the dependency to its absolute path 4 Run `pip install -c constraints.txt ./dependent`, assuming the constraints file and the project directories are next to each other **Output** ``` $ ls constraints.txt dependency_bleh dependent $ cat constraints.txt dependency_bleh @ file:///absolute/path/of/pwd/dependency_bleh dependent @ file:///absolute/path/of/pwd/dependent $ pip install -c constraints.txt ./dependent Processing ./dependent Installing build dependencies ... done Getting requirements to build wheel ... done Installing backend dependencies ... error ERROR: Command errored out with exit status 1: command: <venv>/bin/python3.8 <venv>/lib/python3.8/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-67rnvdf5/normal --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- dependency_bleh cwd: None Complete output (2 lines): ERROR: Could not find a version that satisfies the requirement dependency_bleh (from versions: none) ERROR: No matching distribution found for dependency_bleh ---------------------------------------- ERROR: Command errored out with exit status 1: <venv>/bin/python3.8 <venv>/lib/python3.8/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-67rnvdf5/normal --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- dependency_bleh Check the logs for full command output. ```
      author:
         url:https://github.com/mwchase
         type:Person
         name:mwchase
      datePublished:2020-06-14T16:18:14.000Z
      interactionStatistic:
         type:InteractionCounter
         interactionType:https://schema.org/CommentAction
         userInteractionCount:5
      url:https://github.com/8439/pip/issues/8439
      context:https://schema.org
      headline:Respect top-level "constraints" file when populating isolated build environments
      articleBody:**Environment** * pip version: 20.1.1 * Python version: 3.8.2 * OS: Linux <!-- Feel free to add more information about your environment here --> `pip freeze` output: ``` attrs==19.3.0 certifi==2020.4.5.2 chardet==3.0.4 docutils==0.16 flit==2.3.0 flit-core==2.3.0 idna==2.9 punq==0.4.1 pytoml==0.1.21 requests==2.23.0 urllib3==1.25.9 ``` **Description** <!-- A clear and concise description of what the bug is. --> Installing a package using a PEP 517 backend with build isolation enabled results in an `install_requirements` call using the return value of `backend.get_requires_for_build_wheel()`, which generates and runs a `pip install` command. Constraints files passed to the outermost `pip install` command are not reflected in the generated command. This means that, at least when using flit, a local install with build isolation will fail if it's relying on a constraints file to specify paths to dependencies that are only available locally. (The other build backends I checked don't require the runtime requirements in the isolated environment. I brought this up in the flit repo first in https://github.com/takluyver/flit/issues/354) **Expected behavior** <!-- A clear and concise description of what you expected to happen. --> Given two projects, a dependency and a dependent, with the dependent using flit, and the dependency not present in an index, the command `pip install -c path/to/constraints.txt path/to/dependent`, where the constraints file has a line like `name-of-dependency @ file:///absolute/path/to/dependency` should succeed. **How to Reproduce** <!-- Describe the steps to reproduce this bug. --> 1. Create a "dependency" project with a name not present in pypi 2. Create a "dependent" project that depends on the dependency, using flit 3. Create a `constraints.txt` file that at least contains a direct reference linking the name of the dependency to its absolute path 4 Run `pip install -c constraints.txt ./dependent`, assuming the constraints file and the project directories are next to each other **Output** ``` $ ls constraints.txt dependency_bleh dependent $ cat constraints.txt dependency_bleh @ file:///absolute/path/of/pwd/dependency_bleh dependent @ file:///absolute/path/of/pwd/dependent $ pip install -c constraints.txt ./dependent Processing ./dependent Installing build dependencies ... done Getting requirements to build wheel ... done Installing backend dependencies ... error ERROR: Command errored out with exit status 1: command: <venv>/bin/python3.8 <venv>/lib/python3.8/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-67rnvdf5/normal --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- dependency_bleh cwd: None Complete output (2 lines): ERROR: Could not find a version that satisfies the requirement dependency_bleh (from versions: none) ERROR: No matching distribution found for dependency_bleh ---------------------------------------- ERROR: Command errored out with exit status 1: <venv>/bin/python3.8 <venv>/lib/python3.8/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-67rnvdf5/normal --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- dependency_bleh Check the logs for full command output. ```
      author:
         url:https://github.com/mwchase
         type:Person
         name:mwchase
      datePublished:2020-06-14T16:18:14.000Z
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      url:https://github.com/8439/pip/issues/8439
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      url:https://github.com/mwchase
      name:mwchase
      url:https://github.com/mwchase
      name:mwchase
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