From 2d4142e5649844f3d15fc5013a3be9718485d24f Mon Sep 17 00:00:00 2001
From: Cansin Yildiz <cansinyildiz@gmail.com>
Date: Tue, 3 Oct 2023 22:38:42 +0300
Subject: [PATCH] feat(install): add 'exact' option

addresses https://github.com/pypa/pipenv/issues/5531
---
 pipenv/cli/command.py      |  1 +
 pipenv/cli/options.py      | 20 ++++++++++++++++++++
 pipenv/project.py          | 12 +++++++++++-
 pipenv/routines/install.py |  9 +++++++--
 4 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/pipenv/cli/command.py b/pipenv/cli/command.py
index fb4ee0589d..6c0ffb65c2 100644
--- a/pipenv/cli/command.py
+++ b/pipenv/cli/command.py
@@ -212,6 +212,7 @@ def install(state, **kwargs):
         python=state.python,
         pypi_mirror=state.pypi_mirror,
         system=state.system,
+        exact=state.installstate.exact,
         ignore_pipfile=state.installstate.ignore_pipfile,
         requirementstxt=state.installstate.requirementstxt,
         pre=state.installstate.pre,
diff --git a/pipenv/cli/options.py b/pipenv/cli/options.py
index 701cf9ed83..ccd9db783d 100644
--- a/pipenv/cli/options.py
+++ b/pipenv/cli/options.py
@@ -77,6 +77,7 @@ class InstallState:
     def __init__(self):
         self.dev = False
         self.pre = False
+        self.exact = False
         self.ignore_pipfile = False
         self.code = False
         self.requirementstxt = None
@@ -130,6 +131,24 @@ def callback(ctx, param, value):
     )(f)
 
 
+def exact_option(f):
+    def callback(ctx, param, value):
+        state = ctx.ensure_object(State)
+        state.installstate.exact = value
+        return value
+
+    return option(
+        "--exact",
+        is_flag=True,
+        default=False,
+        expose_value=False,
+        help="Add exact package version to Pipfile when installing, instead of *.",
+        callback=callback,
+        type=click_types.BOOL,
+        show_envvar=True,
+    )(f)
+
+
 def ignore_pipfile_option(f):
     def callback(ctx, param, value):
         state = ctx.ensure_object(State)
@@ -607,6 +626,7 @@ def install_options(f):
     f = sync_options(f)
     f = index_option(f)
     f = requirementstxt_option(f)
+    f = exact_option(f)
     f = ignore_pipfile_option(f)
     f = editable_option(f)
     f = package_arg(f)
diff --git a/pipenv/project.py b/pipenv/project.py
index b96487c108..0329c542a2 100644
--- a/pipenv/project.py
+++ b/pipenv/project.py
@@ -1197,13 +1197,23 @@ def generate_package_pipfile_entry(self, package, pip_line, category=None):
         else:
             return name, normalized_name, entry
 
-    def add_package_to_pipfile(self, package, pip_line, dev=False, category=None):
+    def add_package_to_pipfile(
+        self, package, pip_line, dev=False, category=None, exact=False
+    ):
         category = category if category else "dev-packages" if dev else "packages"
 
         name, normalized_name, entry = self.generate_package_pipfile_entry(
             package, pip_line, category=category
         )
 
+        if exact:
+            from pipenv.utils.resolver import resolve_deps
+
+            resolved_packages, resolver = resolve_deps(
+                {normalized_name: package.name}, None, self, category=category
+            )
+            entry = str(resolver.install_reqs[normalized_name].specifier)
+
         return self.add_pipfile_entry_to_pipfile(
             name, normalized_name, entry, category=category
         )
diff --git a/pipenv/routines/install.py b/pipenv/routines/install.py
index 2f135b4354..c38efe9698 100644
--- a/pipenv/routines/install.py
+++ b/pipenv/routines/install.py
@@ -36,6 +36,7 @@ def do_install(
     python=False,
     pypi_mirror=None,
     system=False,
+    exact=False,
     ignore_pipfile=False,
     requirementstxt=False,
     pre=False,
@@ -243,7 +244,11 @@ def do_install(
                     if categories:
                         for category in categories:
                             added, cat, normalized_name = project.add_package_to_pipfile(
-                                pkg_requirement, pkg_line, dev, category
+                                pkg_requirement,
+                                pkg_line,
+                                dev,
+                                category=category,
+                                exact=exact,
                             )
                             if added:
                                 new_packages.append((normalized_name, cat))
@@ -253,7 +258,7 @@ def do_install(
                                 )
                     else:
                         added, cat, normalized_name = project.add_package_to_pipfile(
-                            pkg_requirement, pkg_line, dev
+                            pkg_requirement, pkg_line, dev, exact=exact
                         )
                         if added:
                             new_packages.append((normalized_name, cat))