Make the `env_var_t::missing_var()` object a singleton rather than a
dynamically constructed object. This requires some discipline in its use
since C++ doesn't directly support immutable objects. But it is slightly
more efficient and helps identify code that incorrectly mutates `env_var_t`
objects that should not be modified.
It's bugged me forever that the scope is the second arg to `env_get()`
but not `env_set()`. And since I'll be introducing some helper functions
that wrap `env_set()` now is a good time to change the order of its
arguments.
Specifically closes#4313.
Not being as agressive in what we ignore/blacklist, but can be revisited
easily in the future to add more characters to the argument blacklist.
Specifically closes#4313.
Not being as agressive in what we ignore/blacklist, but can be revisited
easily in the future to add more characters to the argument blacklist.
* Clarify dependencies: required vs optional, and build vs runtime.
A first pass at updating the dependency documentation, based on the
discussion in this thread:
https://github.com/fish-shell/fish-shell/issues/2062
* Clarify notes on dependency errors, tests, and VCS integration.
An optional feature that suggests you install Python is okay;
core-dumping is not.
The note on tests was about fish development tests, not the `test`
builtin for conditional syntax.
Specifically mention git, hg, and svn in the VCS section.
An optional feature that suggests you install Python is okay;
core-dumping is not.
The note on tests was about fish development tests, not the `test`
builtin for conditional syntax.
Specifically mention git, hg, and svn in the VCS section.
My previous change to eliminate `class var_entry_t` caused me to notice
that `env_get()` turned a set but empty var into a missing var. Which
is wrong. Fixing that brought to light several other pieces of code that
were wrong as a consequence of the aforementioned bug.
Another step to fixing issue #4200.
By far the most common problem with universal variables being overridden
by global variables is other values being imported from the environment;
the `set -q; or set -gx` is much more of an edge case.
* Fix clearing abandoned line with VTE
With VTE-based terminals, resizing currently causes multi-line prompts
to go weird.
This changes the sequence we use to clear the line to one suggested by
a VTE
developer (https://bugzilla.gnome.org/show_bug.cgi?id=763390#c4).
It changes nothing in konsole 17.04.3 and urxvt 9.22, but they already
work.
Note that this does not fix the case where output did not end in a
newline, but that doesn't seem to be up to us. Also, it only affects
those lines.
Fixes#2320.
* Use terminfo definition instead of hardcoding
Thanks to @ixjlyons.
These completions never actually worked and always fell back to the
builtin path completion. But a recent fix means that these now keep the
fallback from happening resulting in no completions for these commands.
Doing `set -U var` when a global named `var` exists can result in
confusing behavior. Try to limit the confusion by improving the warning
we write. Also, only write the warning if interactive.
Fixes#4267
