I've been using hsenv (with great success!)
to deal with the usual cabal dependency issues.
Its terrific, but there is one glitch I can't get around: how to persuade the
(also excellent!) vim-haskellmode to use the environment variables set by hsenv -- namely the paths to GHC, cabal database and so on
when compiling, generating tags etc.
Does anyone know how to solve this problem?
Sorry, hit the wrong button -- I should be asking questions about how to use SO instead :)
Anyways, an even better trick is to put this into the .vimrc
let g:ghc=system("which ghc")
This way (assuming that g:ghc gets bound when you run vim) it will pick up whichever ghc
is being currently used (by hsenv).
Ranjit Jhala.
One, simple solution is to hack one's .vimrc so that
let g:ghc="/path/to/hsenv/ghc"
Related
I have the awesome vim-sexp and vim-sexp-mappings-for-regular-people plugins installed, and I've come across a situation I'm not sure how to solve.
Suppose I have the following form:
(alimony barbara (code determinant) eclair final-countdown)
How can I transform that to:
(alimony
barbara
(code determinant)
eclair
final-countdown)
I can go ahead and insert a newline before every inner-form/element, but that is a bit tedious. There should be a way with or without the sexp plugin
This is an old question, but maybe an updated answer will help someone who comes here in the future.
You don't have to write the program mentioned by Kaz. Others have already done it. I have not tried them, but here are a few:
fipp,
cljfmt,
cljstyle,
zprint,
joker. (The last one does more than code formatting.)
As Kaz suggests, once installed, you can pipe code to a formatter using !. You can even bind this operation to a key combination. Some of the formatters offer suggestions about how to do this sort of thing.
In addition, some vim IDE plugins, such as vim-iced provide support for using an external formatter.
A productive way to get this behavior would be, rather than fighting with Vim modules and extensions, to write a Lisp program which reads S-expressions and outputs them reformatted in the desired way. To use that program out of Vim, just pipe a range of lines into it using the ! command.
In eclipse, if you change a variable name, eclipse will automatically change this variable's name in whole project.
Can vim do that too?
Vim is a text editor, not an IDE. Though it has some notion of a filetype's syntax, it does not fully parse nor understand the language's full syntax. Refactorings, even simple ones like Rename identifier, do require such full understanding (to be 100% correct).
There are attempts at refactoring support in Vim, most language-specific, some also generic. But I'd advise to keep using a real IDE for this (for its comfort, safety, and correctness), and instead use Vim only for simple, text-based replacements, using :bufdo substitute/... or macros, as described here.
Sort of.
Because it is not an IDE and thus doesn't understand anything about your code, Vim only sees text where you see a variable name. It can't infer anything from the scope or whatever. Without the use of some external program, renaming a variable in Vim is usually done with a buffer-wide or project-wide search/replace.
Since you didn't tell us what language you are working with we can't tell you if there is a language-specific solution for your needs.
try this plugin -> Clighter, for c-family rename-refactoring. It's based on clang, but there are limitations. Still in development
I'm a long time Emacs user, but partially switched to MacVim 2 years ago, and have been using it for all my programming work (still using Emacs for other stuff). I decided to switch back to Emacs now, mainly because of the awesome evil-mode. I'm quite happy, but I still haven't found something as good and simple as the Vim Command-T plugin.
The main problem with the Emacs alternatives is that they are either too complicated and or slow.
The closest thing to Command-T is helm/helm-cmd-t, but it doesn't quite work like it.
Let's say you have two paths:
app/controllers/admin/feedback_controller.rb
app/controllers/fee_controller.rb
In Vim's Command-T, you can write:
app/controllers/fe
And it will match both paths.
With helm-cmd-t, if I write app/controllers/fee, it will only match fee_controller. If I want to match both, I have to use a regexp, as in app/controllers/.*, which is not that bad, but requires more keystrokes.
Any suggestions appreciated!
Any Emacs package that uses ido can do this, provided that ido-flex-match is non-nil. Helm-cmd-t deliberately doesn't support this kind of flexible matching.
You can get the behaviour you describe using find-file-in-repository with ido-flex-match set to 't.
I've recently started using flx with ido-mode and projectile it has exceptionally good, ranked fuzzy matching and has a very similar feel to CtrlP and CmdT for Vim.
It can be installed via MELPA.
M-x package-install
flx
For more info see the flx project.
Here's a screengrab to illustrate...
Here it is, but required helm to be installed first: https://github.com/emacs-helm/helm-cmd-t
EDIT: See my Helm guide. Read why it is powerful. See helm with projectile in action in that section.
With fuzzy searcher like Ido + flx or the like in Vim, you have to type thing in order.
With Helm, you can perform out of order matching.I called it out of order because whether I enter "main.c x86" or "x86 main.c", I get the same set of results for the either query. But it also makes sense to call it multi-steps search. Without having to enter the search strings (called "patterns", which are actually regexp) in an orderly fashion, Helm gives me greater freedom: I can enter the thing I wanted first in my mind without having to remember its complex path; if there are many candidates from the target I wanted, I narrow it down further with more details (patterns).
The above example to illustrate the two cases from the advantage above:
If my desire target is not unique, fine I can narrow further.
If my desire target is unique, I can immediately get it.
As you can see, the Linux kernel source tree contains more than 40kfiles, and I narrowed it down to a few files immediately.
Visual Studio also implements this mechanism in their project search, but it's not generic as Helm. In Helm, you can reuse the same Helm interface for many other things; for example, see helm-semantic-or-imenu. You have something like an outline tree, but you can interactively and incrementally narrow to the candidates you want with a few simple patterns.
Finally, fyi, flx author - Le Wang - is using Helm.
Did you try LustyExplorer? It's based on the Vim plugin with the same name.
Also, it looks like you are not using Command-T to the best of its capabilities: acfe should be enough for it to match those two files. What you do is not particularly better than :e app/con*/**/fe<Tab>.
I've once run across gpicker which advertises speed as one of its advantages over Ido and other "native" elisp packages. Never got to try it out on real-world projects though, but it might work for you.
Long story short - there's nothing quite like command-T for Emacs. Best options are gpicker or Peepcode's peepopen, but they are external applications, and I find them to be distracting after using command-T for so long. I'll stick to MacVim for now, only because of command-T, but might look into implementing something that behaves just like command-T as an exercise.
Thank you all for the answers and comments!
Give textmate.el a try :)
https://github.com/defunkt/textmate.el
You'll just have to use "Command+T" instead of "Ctrl+P" :)
https://github.com/bling/fzf.el
This is the best solution out there in my opinion. Here's why:
Uses projectile to determine project root if you're in a project.
Otherwise it very quickly indexes the file in the current directory.
Fuzzy matching.
Can be customized (top or bottom placement, number of records, etc.)
On 6.12.2, this just worked for me, I think. But now I'm on a new box with 6.12.3 (generic unix binary), and there's obviously some setting I'm missing.
I have a console history in ghci within a single session (i.e. execution of ghci), but this history isn't saved and reloaded between sessions, as it used to be. I can't keep track if ghci is using readline, editline, or haskeline even, so I'm not quite sure where to start in terms of fixing this.
This might not be of much help but have you checked whether the ghci_history file is being written to in ~/.ghc/ghci_history?
The Sean Seefried's answer does not work in Windows systems because ghc has its home in %APPDATA%\ghci (in my case, C:\Users\me\AppData\Roaming\ghci).
The file can be found in there: ghci_history
It is a simple question to which I am not able to find the answer:
Given a LaTeX command, how do I find out what package(s) it belongs to or comes from?
For example, given the \qquad horizontal spacing command, what package does it come from? Especially troublesome since it works without including any package!
Given a LaTeX command, how do I find out what package(s) it belongs to or comes from?
Consult your references:
If it's in the index to the TeXbook, it's inherited from TeX, the engine that drives LaTeX.
Otherwise, if it's in the index to the LaTeX manual, it's probably defined in latex.ltx or in one of the standard class files, not in a package.
Otherwise, if it's in the index to The LaTeX Companion, the page number probably tells you what package it's from.
Otherwise, you could do some fancy grepping on the results of find /usr/share/texmf -name '*.sty', but be prepared for a painful exercise.
Or, you could ask on http://stackoverflow.com. But then some idiot will respond by asking why you want to know...
You can search http://www.ctan.org/tex-archive/info/symbols/comprehensive/ for that information and more.
Remember that LaTeX is a macro language on top of TeX, and all the macros are made up of TeX which doesn't need to be imported. \qquad is in that category.
As far as I know, there is no really good general answer to this. But there are a number of techniques you might try for any given command. In the case of \qquad, it's part of basic TeX. Remember that you can always use TeX in interactive mode:
$ tex '\show\qquad'
This is TeX, Version 3.141592 (Web2C 7.5.6)
> \qquad=macro:
->\hskip 2em\relax .
\show\qquad
? x
No pages of output.
Some macros are added by LaTeX on top of TeX, such as \begin:
$ tex '\show\begin'
This is TeX, Version 3.141592 (Web2C 7.5.6)
> \begin=undefined.
\show\begin
? x
No pages of output.
whereas
$ latex '\show\begin'
This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6)
%&-line parsing enabled.
entering extended mode
LaTeX2e
Babel and hyphenation patterns for english, usenglishmax, dumylang, noh
yphenation, greek, monogreek, ancientgreek, ibycus, pinyin, loaded.
> \begin=macro:
#1->\#ifundefined {#1}{\def \reserved#a {\#latex#error {Environment #1 undefine
d}\#eha }}{\def \reserved#a {\def \#currenvir {#1}\edef \#currenvline {\on#line
}\csname #1\endcsname }}\#ignorefalse \begingroup \#endpefalse \reserved#a .
\show\begin
? x
No pages of output.
Everything else comes from packages. If you really wanna know which package a macro comes from (other than by google or grepping your texmf tree), you can check after each package you load whether it's defined. Try defining this before any \usepackage commands:
\let\oldusepackage\usepackage
\renewcommand\usepackage[1]{
\oldusepackage{#1}
\ifcsname includegraphics\endcsname
\message{^^Jincludegraphics is defined in #1^^J}
\let\usepackage\oldusepackage
\fi}
Then when you run latex on your .tex file, look for a line in the output that says includegraphics is defined in graphicx. It's not likely, but some devious packages might do bad things with \usepackage so there's a chance this might not work. Another alternative would be to simply define the command you're interested in before loading any packages:
\newcommand\includegraphics{}
Then you might get an error message when the package that defines the command is loading. This is actually less reliable than the former approach, since many packages use \def and \let to define their macros rather than \newcommand, bypassing the "already-defined" check. You could also just insert a check by hand in between each load: \ifcsname includegraphics\endcsname\message{^^Jdefined after graphicx^^J}\fi
Due to lack of reputation I cannot comment on Steve's answer, which was very helpful to me, but I would like to extend it a bit.
First, in his second approach (fiddling with usepackage) the case where usepackage has optional arguments is not dealt with. Secondly, packages are often loaded by other packages via RequirePackage which makes it hard to find the actual place of definition of a command. So my refinement of Steve's answer is:
\usepackage{xargs}
\let\oldusepackage\usepackage
\let\oldRequirePackage\RequirePackage
\renewcommandx{\usepackage}[3][1,3]{
\oldusepackage[#1]{#2}[#3]
\ifcsname includegraphics\endcsname
\message{^^Jincludegraphics is defined in #2^^J}
\let\usepackage\oldusepackage
\let\RequirePackage\oldRequirePackage
\fi}
\renewcommandx{\RequirePackage}[3][1,3]{
\oldRequirePackage[#1]{#2}[#3]
\ifcsname includegraphics\endcsname
\message{^^Jincludegraphics is defined in #2^^J}
\let\usepackage\oldusepackage
\let\RequirePackage\oldRequirePackage
\fi}
The xargs package is used here to get the unusual options of usepackage right (first and third parameter are optional).
Putting this directly after documentclass should tell where includegraphics is defined.