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541de515
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2020-04-01T17:36:13
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cmake: streamline backend detection
We're currently doing unnecessary work to auto-detect backends even if
the functionality is disabled altogether. Let's fix this by removing the
extraneous FOO_BACKEND variables, instead letting auto-detection modify
the variable itself.
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41b6d30c
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2020-02-24T21:03:11
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cmake: sanitize boolean options passed by user
Starting with our conversions to mix backend-autodetection and selection
into a single variable (USE_GSSAPI, USE_HTTPS, USE_SHA1), we have
introduced a simple STREQUAL to check for "ON", which indicates that the
user wants us to auto-detect available backends and pick any one that's
available. This behaviour deviates from previous behaviour, as passing a
value like "yes", "on" or "true" will in fact be treated like a backend
name and result in autodetection failure.
Fix the issue by introducing a new function `SanitizeBool`. Given a
variable that may hold a boolean value, the function will sanitize that
variable to hold either "ON" or "OFF". In case it is not a recognized
boolean, we will just keep the value as-is. This fixes the above
described issue.
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212b6f65
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2019-08-02T14:00:21
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cmake: fix various misuses of MESSAGE()
The MESSAGE() function expects as first argument the message type, e.g.
STATUS or FATAL_ERROR. In some places, we were misusing this to either
not provide any type, which would then erroneously print the message to
standard error, or to use FATAL instead of FATAL_ERROR.
Fix all of these instances. Also, remove some MESSAGE invocations that
are obvious leftovers from debugging the build system.
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b7c247b3
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2019-07-18T13:37:02
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cmake: include SHA1 headers into our source files
When selecting the SHA1 backend, we only include the respective C
implementation of the selected backend. But since commit bd48bf3fb
(hash: introduce source files to break include circles, 2019-06-14), we
have introduced separate headers and compilation units for all hashes.
So by not including the headers, we may not honor them to compute
whether a file needs to be recompiled and they also will not be
displayed in IDEs.
Add the header files to fix this problem.
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fda20622
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2019-06-14T14:22:19
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hash: move SHA1 implementations into 'sha1/' folder
As we will include additional hash algorithms in the future due
to upstream git discussing a move away from SHA1, we should
accomodate for that and prepare for the move. As a first step,
move all SHA1 implementations into a common subdirectory.
Also, create a SHA1-specific header file that lives inside the
hash folder. This header will contain the SHA1-specific header
includes, function declarations and the SHA1 context structure.
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bd48bf3f
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2019-06-14T14:21:32
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hash: introduce source files to break include circles
The hash source files have circular include dependencies right
now, which shows by our broken generic hash implementation. The
"hash.h" header declares two functions and the `git_hash_ctx`
typedef before actually including the hash backend header and can
only declare the remaining hash functions after the include due
to possibly static function declarations inside of the
implementation includes.
Let's break this cycle and help maintainability by creating a
real implementation file for each of the hash implementations.
Instead of relying on the exact include order, we now especially
avoid the use of `GIT_INLINE` for function declarations.
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94fc83b6
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2019-06-13T16:48:35
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cmake: Modulize our TLS & hash detection
The interactions between `USE_HTTPS` and `SHA1_BACKEND` have been
streamlined. Previously we would have accepted not quite working
configurations (like, `-DUSE_HTTPS=OFF -DSHA1_BACKEND=OpenSSL`) and, as
the OpenSSL detection only ran with `USE_HTTPS`, the link would fail.
The detection was moved to a new `USE_SHA1`, modeled after `USE_HTTPS`,
which takes the values "CollisionDetection/Backend/Generic", to better
match how the "hashing backend" is selected, the default (ON) being
"CollisionDetection".
Note that, as `SHA1_BACKEND` is still used internally, you might need to
check what customization you're using it for.
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