minstall: rework root elevation prompt for extensibility and behavior

There's a couple issues with the current approach:
- pkexec is an unusual elevation method, the standard is sudo
- it tries to elevate even in automated workflows
- the user may not want to automatically rerun as root, that might be
  badly behaved

Do some upfront checks instead, first to make sure it even makes sense
to try becoming root, and then to ask the user "do you really want
this". Also check for a couple common approaches to root elevation,
including doas.

Fixes #7345
Fixes #7809

1 files changed, 9 insertions, 0 deletions

diff --git a/docs/markdown/snippets/meson_install_elevate.md b/docs/markdown/snippets/meson_install_elevate.md
new file mode 100644
index 0000000..2ba92e6
--- /dev/null
+++ b/docs/markdown/snippets/meson_install_elevate.md
@@ -0,0 +1,9 @@
+## `meson install` now supports user-preferred root elevation tools
+
+Previously, when installing a project, if any files could not be installed due
+to insufficient permissions the install process was automatically re-run using
+polkit. Now it prompts to ask whether that is desirable, and checks for
+CLI-based tools such as sudo or opendoas or `$MESON_ROOT_CMD`, first.
+
+Meson will no longer attempt privilege elevation at all, when not running
+interactively.