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Eli Bendersky 2013-04-09 21:19:14 -07:00
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pep-0439.txt
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@ -22,7 +22,7 @@ users.
This PEP does not propose to include the pip implementation in the This PEP does not propose to include the pip implementation in the
Python standard library. Nor does it propose to implement any package Python standard library. Nor does it propose to implement any package
management or installation mechanisms beyond those provided by PEPs management or installation mechanisms beyond those provided by PEP
427 ("The Wheel Binary Package Format 1.0") and TODO distlib PEP. 427 ("The Wheel Binary Package Format 1.0") and TODO distlib PEP.
@ -62,11 +62,11 @@ publishing packages`_.
The pip bootstrap The pip bootstrap
----------------- -----------------
The Python installation includes an executable called "pip" that attempts to The Python installation includes an executable called "pip3" (see PEP 394 for
import pip machinery. If it can then the pip command proceeds as naming rationale etc.) that attempts to import pip machinery. If it can
normal. If it cannot it will bootstrap pip by downloading the pip then the pip command proceeds as normal. If it cannot it will bootstrap pip by
implementation wheel file. Once installed, the pip command proceeds downloading the pip implementation wheel file. Once installed, the pip command
as normal. proceeds as normal.
A boostrap is used in the place of a the full pip code so that we A boostrap is used in the place of a the full pip code so that we
don't have to bundle pip and also the install tool is upgradeable don't have to bundle pip and also the install tool is upgradeable
@ -84,9 +84,9 @@ The bootstrap process will proceed as follows:
1. The user system has Python (3.4+) installed. In the "scripts" 1. The user system has Python (3.4+) installed. In the "scripts"
directory of the Python installation there is the bootstrap script directory of the Python installation there is the bootstrap script
called "pip". called "pip3".
2. The user will invoke a pip command, typically "pip install 2. The user will invoke a pip command, typically "pip3 install
<package>", for example "pip install Django". <package>", for example "pip3 install Django".
3. The boostrap script will attempt to import the pip implementation. 3. The boostrap script will attempt to import the pip implementation.
If this succeeds, the pip command is processed normally. If this succeeds, the pip command is processed normally.
4. On failing to import the pip implementation the bootstrap notifies 4. On failing to import the pip implementation the bootstrap notifies
@ -94,7 +94,7 @@ The bootstrap process will proceed as follows:
latest download wheel file (see PEP 427.) latest download wheel file (see PEP 427.)
5. Upon downloading the file it is installed using the distlib 5. Upon downloading the file it is installed using the distlib
installation machinery for wheel packages. Upon completing the installation machinery for wheel packages. Upon completing the
installation the user is notified that "pip has been upgraded." installation the user is notified that "pip3 has been upgraded."
TODO how is it verified? TODO how is it verified?
6. The pip tool may now import the pip implementation and continues to 6. The pip tool may now import the pip implementation and continues to
process the requested user command normally. process the requested user command normally.
@ -102,7 +102,7 @@ The bootstrap process will proceed as follows:
Users may be running in an environment which cannot access the public Users may be running in an environment which cannot access the public
Internet and are relying solely on a local package repository. They Internet and are relying solely on a local package repository. They
would use the "-i" (Base URL of Python Package Index) argument to the would use the "-i" (Base URL of Python Package Index) argument to the
"pip install" command. This use case will be handled by: "pip3 install" command. This use case will be handled by:
1. Recognising the command-line arguments that specify alternative or 1. Recognising the command-line arguments that specify alternative or
additional locations to discover packages and attempting to additional locations to discover packages and attempting to
@ -115,7 +115,7 @@ would use the "-i" (Base URL of Python Package Index) argument to the
the file manually. the file manually.
Manual installation of the pip implementation will be supported Manual installation of the pip implementation will be supported
through the manual download of the wheel file and "pip install through the manual download of the wheel file and "pip3 install
<downloaded wheel file>". <downloaded wheel file>".
This installation will not perform standard pip installation steps of This installation will not perform standard pip installation steps of
@ -130,10 +130,10 @@ risk we will use the embedded signature support in the wheel format to validate
the downloaded file. the downloaded file.
Beyond those arguments controlling index location and download Beyond those arguments controlling index location and download
options, the "pip" boostrap command may support further standard pip options, the "pip3" boostrap command may support further standard pip
options for verbosity, quietness and logging. options for verbosity, quietness and logging.
The "--no-install" option to the "pip" command will not affect the The "--no-install" option to the "pip3" command will not affect the
bootstrapping process. bootstrapping process.
setuptools setuptools