Age | Commit message (Collapse) | Author | Files | Lines |
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This is similar to dist and makes sure we handle posthoc targets.
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It can generally be useful, for example, to complete relative paths before
saving them to config.build (if abs_dir_path does not fit).
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GitHub issue #372.
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Specifically, do not reduce typed RHS empty simple values for prepend/append
and additionally for assignment provided LHS is typed and is a container.
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Unlike normal and ad hoc prerequisites, a post hoc prerequisite is built
after the target, not before. It may also form a dependency cycle together
with normal/ad hoc prerequisites. In other words, all this form of dependency
guarantees is that a post hoc prerequisite will be built if its dependent
target is built.
See the NEWS file for details and an example.
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We still always use the public var_pool from context but where required,
all access now goes through scope::var_pool().
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Specifically, only values marked with 1 are treated as default leaving
other values for use for other purposes.
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In particular, the match() rename makes sure it doesn't clash with
rule::match() which, after removal of the hint argument in simple_rule,
has exactly the same signature, thus making it error-prone to calling
recursively.
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This variable allows a project to distinguish between development and
consumption builds. While normally there is no distinction between these two
modes, sometimes a project may need to provide additional functionality during
development. For example, a source code generator which uses its own generated
code in its implementation may need to provide a bootstrap step from the
pre-generated code. Normally, such a step is only needed during development.
See "Project Configuration" in the manual for details.
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Seeing that std::map is becoming a common Buildfile variable type.
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We are reusing the buildspec syntax for that.
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Now a project that disables amalgamation will not logically "see" an outer
project even if it's physically inside its scope.
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Now we consistently use term "lookup" for variable value lookup. At some
point we should also rename type lookup to binding and get rid of all the
lookup_type aliases.
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Before:
x = [string null]
After:
x = [string, null]
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Note that the inherited value part is documented but is not yet fully
implemented.
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Also rename the $config.export() function to $config.save().
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This is similar to the config.export variable functionality except it can be
called from within buildfiles.
Note that this function can only be used during configure unless the config
module creation was forced for other meta-operations with config.module=true
in bootstrap.build.
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The new config.export variable specifies the alternative file to write the
configuration to as part of the configure meta-operation. For example:
$ b configure: proj/ config.export=proj-config.build
The config.export value "applies" only to the projects on whose root scope it
is specified or if it is a global override (the latter is a bit iffy but we
allow it, for example, to dump everything to stdout). This means that in order
to save a subproject's configuration we will have to use a scope-specific
override (since the default will apply to the outermost amalgamation). For
example:
$ b configure: subproj/ subproj/config.export=.../subproj-config.build
This could be somewhat unnatural but then it will be the amalgamation whose
configuration we normally want to export.
The new config.import variable specifies additional configuration files to be
loaded after the project's default config.build, if any. For example:
$ b create: cfg/,cc config.import=my-config.build
Similar to config.export, the config.import value "applies" only to the
project on whose root scope it is specified or if it is a global override.
This allows the use of the standard override "positioning" machinery (i.e.,
where the override applies) to decide where the extra configuration files are
loaded. The resulting semantics is quite natural and consistent with command
line variable overrides, for example:
$ b config.import=.../config.build # outermost amalgamation
$ b ./config.import=.../config.build # this project
$ b !config.import=.../config.build # every project
Both config.export and config.import recognize the special `-` file name as an
instruction to write/read to/from stdout/stdin, respectively. For example:
$ b configure: src-prj/ config.export=- | b configure: dst-prj/ config.import=-
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All non-const global state is now in class context and we can now have
multiple independent builds going on at the same time.
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