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spack.bat: Fixup CL arg parsing (#39359)

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Previous changes to this file stopped directly processing CL args to
stop batch `for` from interpolating batch reserved characters needed in
arguments like URLS. In doing so, we relied on `for` for an easy
"split" operation, however this incorrectly splits paths with spaces in
certain cases. Processing everything ourselves with manual looping via
`goto` statements allows for full control over CL parsing and handling
of both paths with spaces and reserved characters.
This commit is contained in:
John W. Parent 2023-08-18 17:29:47 -04:00 committed by GitHub
parent b2b00df5cc
commit 4dafae8d17
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1 changed files with 29 additions and 51 deletions
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52
bin/spack.bat
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@ -51,35 +51,18 @@ setlocal enabledelayedexpansion
:: subcommands will never start with '-'
:: everything after the subcommand is an arg
:: we cannot allow batch "for" loop to directly process CL args
:: a number of batch reserved characters are commonly passed to
:: spack and allowing batch's "for" method to process the raw inputs
:: results in a large number of formatting issues
:: instead, treat the entire CLI as one string
:: and split by space manually
:: capture cl args in variable named cl_args
set cl_args=%*
:process_cl_args
rem tokens=1* returns the first processed token produced
rem by tokenizing the input string cl_args on spaces into
rem the named variable %%g
rem While this make look like a for loop, it only
rem executes a single time for each of the cl args
rem the actual iterative loop is performed by the
rem goto process_cl_args stanza
rem we are simply leveraging the "for" method's string
rem tokenization
for /f "tokens=1*" %%g in ("%cl_args%") do (
set t=%%~g
rem remainder of string is composed into %%h
rem these are the cl args yet to be processed
rem assign cl_args var to only the args to be processed
rem effectively discarding the current arg %%g
rem this will be nul when we have no further tokens to process
set cl_args=%%h
rem process the first space delineated cl arg
rem of this iteration
if "!t:~0,1!" == "-" (
rem Set first cl argument (denoted by %1) to be processed
set t=%1
rem shift moves all cl positional arguments left by one
rem meaning %2 is now %1, this allows us to iterate over each
rem argument
shift
rem assign next "first" cl argument to cl_args, will be null when
rem there are now further arguments to process
set cl_args=%1
if "!t:~0,1!" == "-" (
if defined _sp_subcommand (
rem We already have a subcommand, processing args now
if not defined _sp_args (
@ -90,26 +73,21 @@ for /f "tokens=1*" %%g in ("%cl_args%") do (
) else (
if not defined _sp_flags (
set "_sp_flags=!t!"
shift
) else (
set "_sp_flags=!_sp_flags! !t!"
shift
)
)
) else if not defined _sp_subcommand (
) else if not defined _sp_subcommand (
set "_sp_subcommand=!t!"
shift
) else (
) else (
if not defined _sp_args (
set "_sp_args=!t!"
shift
) else (
set "_sp_args=!_sp_args! !t!"
shift
)
)
)
rem if this is not nil, we have more tokens to process
rem if this is not nu;ll, we have more tokens to process
rem start above process again with remaining unprocessed cl args
if defined cl_args goto :process_cl_args