This is a significant speed-up on Windows because terminals are
slow to print things out.
Speed-up in gst-build on Windows:
```
meson install:
before: 5.1 seconds
after: 4.0 seconds
```
In `--only-changed` mode, we were spending half our time inside
`makedirs()`, which is a waste in the case when only a few files have
changed.
Speed-up on Windows with gst-build:
```
meson install --only-changed
before: 1.6 seconds
after: 0.9 seconds
```
If we preserve the existing file, we did not install anything. In that
case, the output now looks like:
```
ninja: Entering directory `.'
ninja: no work to do.
Nothing to install.
Preserved 1732 unchanged files, see meson-logs\install-log.txt for the full list
```
This also avoids an `isfile` lookup, which shaves off a few seconds in
gst-build install.
When `--only-changed` is passed, we only want to know about files that
were newly-installed. Everything else is noise. The full list can
always be found in `install-log.txt` anyway. Sample output:
```
ninja: Entering directory `.'
ninja: no work to do.
Preserved 667 unchanged files, see meson-logs\install-log.txt for the full list
```
Remove the code responsible for implicitly compressing manpages as .gz
files. It has been established that manpage compression is a distro
packager's task, with existing distros already having their own
implementations of compression.
Fixes#4330
This has the adventage that "meson --help" shows a list of all commands,
making them discoverable. This also reduce the manual parsing of
arguments to the strict minimum needed for backward compatibility.
Since we're supposed to call this for each installed path, we only should go
through what we've installed and not what this point to, as it might be
outside our scope or not existent.
To do this, since shutil.chown doesn't expose the follow_symlink that os.chown
has, we can temporarily replace os.chown with a lambda that acutually passes
all the values as we want them, and then restore it to the built-in functions.
Not the nicest way, but fixes the issue without having to reimplement what
shutil does.
Fixes#3914
It's only supported by few platforms when the linked file exists, while it
would cause an error otherwise.
In any case just implement this via an helper set_chmod function that will
handle the case where follow_symlinks is not supported by the platform
and will just not set any mod for the link itself (as it would otherwise
apply to the linked file).
Fixes#3914
Shared modules may be resource-only DLLs, or might automatically
self-initialize using C constructors or WinMain at DLL load time.
When an import library is not found for a shared module, just print
a message about it instead of erroring out.
Fixes#3965
Michael Kuhn