respect develop when installing from git

* fixes python-poetry#1080, again

poetry/json/schemas/poetry-schema.json

@@ -326,6 +326,10 @@
                     "items": {
                         "type": "string"
                     }
+                },
+                "develop": {
+                    "type": "boolean",
+                    "description": "Whether to install the dependency in development mode."
                 }
             }
         },

poetry/packages/locker.py

@@ -304,7 +304,7 @@ def _dump_package(self, package):  # type: (poetry.packages.Package) -> dict
             }
             if package.source_type:
                 data["source"]["type"] = package.source_type
-            if package.source_type == "directory":
+            if package.source_type in {"directory", "vcs"}:
                 data["develop"] = package.develop
 
         return data

poetry/packages/package.py

@@ -297,6 +297,7 @@ def add_dependency(
                     branch=constraint.get("branch", None),
                     tag=constraint.get("tag", None),
                     rev=constraint.get("rev", None),
+                    develop=constraint.get("develop", True),
                     category=category,
                     optional=optional,
                 )

poetry/packages/vcs_dependency.py

@@ -18,6 +18,7 @@ def __init__(
         rev=None,
         category="main",
         optional=False,
+        develop=True,
     ):
         self._vcs = vcs
         self._source = source
@@ -29,6 +30,7 @@ def __init__(
         self._branch = branch
         self._tag = tag
         self._rev = rev
+        self._develop = develop
 
         super(VCSDependency, self).__init__(
             name, "*", category=category, optional=optional, allows_prereleases=True
@@ -58,6 +60,10 @@ def rev(self):
     def reference(self):  # type: () -> str
         return self._branch or self._tag or self._rev
 
+    @property
+    def develop(self):
+        return self._develop
+
     @property
     def pretty_constraint(self):  # type: () -> str
         if self._branch:

poetry/puzzle/provider.py

@@ -169,6 +169,7 @@ def search_for_vcs(self, dependency):  # type: (VCSDependency) -> List[Package]
             dependency.source,
             dependency.reference,
             name=dependency.name,
+            develop=dependency.develop,
         )
 
         for extra in dependency.extras:
@@ -182,7 +183,7 @@ def search_for_vcs(self, dependency):  # type: (VCSDependency) -> List[Package]
 
     @classmethod
     def get_package_from_vcs(
-        cls, vcs, url, reference=None, name=None
+        cls, vcs, url, reference=None, name=None, develop=True,
     ):  # type: (str, str, Optional[str], Optional[str]) -> Package
         if vcs != "git":
             raise ValueError("Unsupported VCS dependency {}".format(vcs))
@@ -206,6 +207,7 @@ def get_package_from_vcs(
             package.source_type = "git"
             package.source_url = url
             package.source_reference = revision
+            package.develop = develop
         except Exception:
             raise
         finally:

poetry/utils/exporter.py

@@ -78,9 +78,11 @@ def _export_requirements_txt(
                     package.source_reference,
                 )
                 dependency.marker = package.marker
-                line = "-e git+{}@{}#egg={}".format(
+                line = "git+{}@{}#egg={}".format(
                     package.source_url, package.source_reference, package.name
                 )
+                if package.develop:
+                    line = "-e " + line
             elif package.source_type in ["directory", "file", "url"]:
                 if package.source_type == "file":
                     dependency = FileDependency(package.name, Path(package.source_url))