Add support for editable pip installs

.gitignore

@@ -133,6 +133,8 @@ dmypy.json
 
 # Used in debugging
 explicit.txt
+# pip editable clones stuff here
+src/
 
 # hatch-vcs
 conda_pypi/_version.py

conda_pypi/cli/pip.py

@@ -15,6 +15,7 @@
     add_parser_help,
     add_parser_prefix,
 )
+from conda.exceptions import ArgumentError
 
 logger = getLogger(f"conda.{__name__}")
 
@@ -56,17 +57,33 @@ def configure_parser(parser: argparse.ArgumentParser):
         default="conda-forge",
         help="Where to look for conda dependencies.",
     )
+    install.add_argument(
+        "-e", "--editable",
+        metavar="<path/url>",
+        help="Install a project in editable mode (i.e. setuptools 'develop mode') "
+        "from a local project path or a VCS url."
+    )
     install.add_argument(
         "--backend",
         metavar="TOOL",
         default="pip",
         choices=BACKENDS,
         help="Which tool to use for PyPI packaging dependency resolution.",
     )
-    install.add_argument("packages", metavar="package", nargs="+")
+    install.add_argument("packages", metavar="package", nargs="*")
 
 
 def execute(args: argparse.Namespace) -> int:
+    if not args.packages and not args.editable:
+        raise ArgumentError(
+            "No packages requested. Please provide one or more packages, "
+            "or one editable specification."
+        )
+    if args.editable and args.backend == "grayskull":
+        raise ArgumentError(
+            "--editable PKG and --backend=grayskull are not compatible. Please use --backend=pip."
+        )
+
     from conda.common.io import Spinner
     from conda.models.match_spec import MatchSpec
     from ..dependencies import analyze_dependencies
@@ -82,13 +99,14 @@ def execute(args: argparse.Namespace) -> int:
     packages_not_installed = validate_target_env(prefix, args.packages)
 
     packages_to_process = args.packages if args.force_reinstall else packages_not_installed
-    if not packages_to_process:
+    if not packages_to_process and not args.editable:
         print("All packages are already installed.", file=sys.stderr)
         return 0
 
     with Spinner("Analyzing dependencies", enabled=not args.quiet, json=args.json):
-        conda_deps, pypi_deps = analyze_dependencies(
+        conda_deps, pypi_deps, editable_deps = analyze_dependencies(
             *packages_to_process,
+            editable=args.editable,
             prefer_on_conda=not args.force_with_pip,
             channel=args.conda_channel,
             backend=args.backend,
@@ -113,6 +131,9 @@ def execute(args: argparse.Namespace) -> int:
                 logger.warning("ignoring extra specifiers for %s: %s", name, specs[1:])
         spec = spec.replace(" ", "")  # remove spaces
         pypi_specs.append(spec)
+    for name, specs in editable_deps.items():
+        for spec in specs:
+            pypi_specs.append(f"--editable={spec}")
 
     if not args.quiet or not args.json:
         if conda_match_specs:

conda_pypi/dependencies/__init__.py

@@ -34,12 +34,13 @@
 
 def analyze_dependencies(
     *pypi_specs: str,
+    editable: str | None = None,
     prefer_on_conda: bool = True,
     channel: str = "conda-forge",
     backend: Literal["grayskull", "pip"] = "pip",
     prefix: str | os.PathLike | None = None,
     force_reinstall: bool = False,
-) -> tuple[dict[str, list[str]], dict[str, list[str]]]:
+) -> tuple[dict[str, list[str]], dict[str, list[str]], dict[str, list[str]]]:
     conda_deps = defaultdict(list)
     needs_analysis = []
     for pypi_spec in pypi_specs:
@@ -56,11 +57,15 @@ def analyze_dependencies(
                 conda_deps[MatchSpec(conda_spec).name].append(conda_spec)
                 continue
         needs_analysis.append(pypi_spec)
+    if editable:
+        needs_analysis.extend(["-e", editable])
 
     if not needs_analysis:
-        return conda_deps, {}
+        return conda_deps, {}, {}
 
     if backend == "grayskull":
+        if editable:
+            logger.warning("Ignoring editable=%s with backend=grayskull", editable)
         from .grayskull import _analyze_with_grayskull
 
         found_conda_deps, pypi_deps = _analyze_with_grayskull(
@@ -69,16 +74,18 @@ def analyze_dependencies(
     elif backend == "pip":
         from .pip import _analyze_with_pip
 
-        python_deps, pypi_deps = _analyze_with_pip(
+        python_deps, pypi_deps, editable_deps = _analyze_with_pip(
             *needs_analysis,
             prefix=prefix,
             force_reinstall=force_reinstall,
-        )
+        )      
+
         found_conda_deps, pypi_deps = _classify_dependencies(
             pypi_deps,
             prefer_on_conda=prefer_on_conda,
             channel=channel,
         )
+
         found_conda_deps.update(python_deps)
     else:
         raise ValueError(f"Unknown backend {backend}")
@@ -89,7 +96,8 @@ def analyze_dependencies(
     # deduplicate
     conda_deps = {name: list(dict.fromkeys(specs)) for name, specs in conda_deps.items()}
     pypi_deps = {name: list(dict.fromkeys(specs)) for name, specs in pypi_deps.items()}
-    return conda_deps, pypi_deps
+    editable_deps = editable_deps if editable else {}
+    return conda_deps, pypi_deps, editable_deps
 
 
 def _classify_dependencies(

conda_pypi/dependencies/pip.py

@@ -12,17 +12,27 @@ def _analyze_with_pip(
     *packages: str,
     prefix: str | None = None,
     force_reinstall: bool = False,
-) -> tuple[dict[str, list[str]], dict[str, list[str]]]:
+) -> tuple[dict[str, list[str]], dict[str, list[str]], dict[str, list[str]]]:
     report = dry_run_pip_json(("--prefix", prefix, *packages), force_reinstall)
     deps_from_pip = defaultdict(list)
+    editable_deps = defaultdict(list)
     conda_deps = defaultdict(list)
     for item in report["install"]:
         metadata = item["metadata"]
         logger.debug("Analyzing %s", metadata["name"])
         logger.debug("  metadata: %s", json.dumps(metadata, indent=2))
-        deps_from_pip[metadata["name"]].append(f"{metadata['name']}=={metadata['version']}")
+        if item.get("download_info", {}).get("dir_info", {}).get("editable"):
+            editable_deps[metadata["name"]].append(item["download_info"]["url"])
+        elif item.get("is_direct"):
+            deps_from_pip[metadata["name"]].append(item["download_info"]["url"])
+        else:
+            deps_from_pip[metadata["name"]].append(f"{metadata['name']}=={metadata['version']}")
         if python_version := metadata.get("requires_python"):
             conda_deps["python"].append(f"python {python_version}")
 
-    deps_from_pip = {name: list(dict.fromkeys(specs)) for name, specs in deps_from_pip.items()}
-    return conda_deps, deps_from_pip
+    deps_from_pip = {
+        name: list(dict.fromkeys(specs))
+        for name, specs in deps_from_pip.items()
+        if name not in editable_deps
+    }
+    return conda_deps, deps_from_pip, editable_deps

conda_pypi/main.py

@@ -139,7 +139,7 @@ def run_pip_install(
     if check and process.returncode:
         raise CondaError(
             f"Failed to run pip:\n"
-            f"  command: {shlex.join(command)}\n"
+            f"  command: {shlex.join(map(str,command))}\n"
             f"  exit code: {process.returncode}\n"
             f"  stderr:\n{process.stderr}\n"
             f"  stdout:\n{process.stdout}"
@@ -265,7 +265,7 @@ def dry_run_pip_json(
         if process.returncode != 0:
             raise CondaError(
                 f"Failed to dry-run pip:\n"
-                f"  command: {shlex.join(cmd)}\n"
+                f"  command: {shlex.join(map(str, cmd))}\n"
                 f"  exit code: {process.returncode}\n"
                 f"  stderr:\n{process.stderr}\n"
                 f"  stdout:\n{process.stdout}"

tests/test_install.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import os
 import sys
 from pathlib import Path
 from subprocess import run
@@ -11,7 +12,7 @@
 from conda.testing import CondaCLIFixture, TmpEnvFixture
 
 from conda_pypi.dependencies import NAME_MAPPINGS, BACKENDS, _pypi_spec_to_conda_spec
-from conda_pypi.python_paths import get_env_python
+from conda_pypi.python_paths import get_env_python, get_env_site_packages
 
 
 @pytest.mark.parametrize("source", NAME_MAPPINGS.keys())
@@ -194,3 +195,47 @@ def test_lockfile_roundtrip(
     print(err2, file=sys.stderr)
     assert rc2 == 0
     assert sorted(out2.splitlines()) == sorted(out.splitlines())
+
+
+@pytest.mark.parametrize(
+    "requirement,name",
+    [
+        (
+            # pure Python
+            "git+https://github.com/dateutil/[email protected]",
+            "python_dateutil",
+        ),
+        (
+            # compiled bits
+            "git+https://github.com/yaml/[email protected]",
+            "PyYAML",
+        ),
+        (
+            # has conda dependencies
+            "git+https://github.com/regro/[email protected]",
+            "conda_forge_metadata",
+        ),
+    ],
+)
+def test_editable_installs(
+    tmp_path: Path, tmp_env: TmpEnvFixture, conda_cli: CondaCLIFixture, requirement, name
+):
+    os.chdir(tmp_path)
+    with tmp_env("python=3.9", "pip") as prefix:
+        out, err, rc = conda_cli(
+            "pip",
+            "-p",
+            prefix,
+            "--yes",
+            "install",
+            "-e",
+            f"{requirement}#egg={name}",
+        )
+        print(out)
+        print(err, file=sys.stderr)
+        assert rc == 0
+        sp = get_env_site_packages(prefix)
+        editable_pth = list(sp.glob(f"__editable__.{name}-*.pth"))
+        assert len(editable_pth) == 1
+        pth_contents = editable_pth[0].read_text().strip()
+        assert pth_contents.startswith((str(tmp_path / "src"), f"import __editable___{name}"))