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Requirements file parsing
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(r( r0 r1 sessionfinderr r r r" c # K t | }t || }|j | | D ] }t |||| }|| yw)aq Parse a requirements file and yield ParsedRequirement instances.
:param filename: Path or url of requirements file.
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:param finder: Instance of pip.index.PackageFinder.
:param options: cli options.
:param constraint: If true, parsing a constraint file rather than
requirements file.
)r r: r9 N)get_line_parserRequirementsFileParserparse handle_line) r1 r9 r: r r line_parserparser parsed_line
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||| y)a Handle a single parsed requirements line; This can result in
creating/yielding requirements, or updating the finder.
:param line: The parsed line to be processed.
:param options: CLI options.
:param finder: The finder - updated by non-requirement lines.
:param session: The session - updated by non-requirement lines.
Returns a ParsedRequirement object if the line is a requirement line,
otherwise returns None.
For lines that contain requirements, the only options that have an effect
are from SUPPORTED_OPTIONS_REQ, and they are scoped to the
requirement. Other options from SUPPORTED_OPTIONS may be present, but are
ignored.
For lines that do not contain requirements, the only options that have an
effect are from SUPPORTED_OPTIONS. Options from SUPPORTED_OPTIONS_REQ may
be present, but are ignored. These lines may contain multiple options
(although our docs imply only one is supported), and all our parsed and
affect the finder.
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comments). The joined line takes on the index of the first line.
N\r )endswith
COMMENT_REmatchrr rp strip)rM primary_line_numbernew_liner rO s r& rJ rJ s H ' T}}T"j&6&6t&< %Tz%*666)2778+<<< !4''&1# OODJJt , - ($ "...!2778#444 s CCc # ~ K | D ]4 \ }}t j d| }|j }|s/||f 6 yw)z1
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r N)r subr )rM r rO s r& rK rK s@ ( T~~b$'zz| t# # (s 1= =c # K | D ]R \ }}t j | D ]/ \ }}t j | }|s |j || }1 ||f T yw)a Replace all environment variables that can be retrieved via `os.getenv`.
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requirement file is `${MY_VARIABLE_1}` to ensure two things:
1. Strings that contain a `$` aren't accidentally (partially) expanded.
2. Ensure consistency across platforms for requirement files.
These points are the result of a discussion on the `github pull
request #3514 `_.
Valid characters in variable names follow the `POSIX standard
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to uppercase letter, digits and the `_` (underscore).
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