vimrc/sources_non_forked/vim-go/doc/vim-go.txt

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*vim-go.txt* Go development plugin
*vim-go*
===============================================================================
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===============================================================================
CONTENTS *go-contents*
1. Intro........................................|go-intro|
2. Install......................................|go-install|
3. Commands.....................................|go-commands|
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4. Mappings.....................................|go-mappings|
5. Text Objects.................................|go-text-objects|
6. Settings.....................................|go-settings|
7. Troubleshooting..............................|go-troubleshooting|
8. Credits......................................|go-credits|
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===============================================================================
INTRO *go-intro*
Go (golang) support for Vim. vim-go installs automatically all necessary
binaries for providing seamless Vim integration. It comes with pre-defined
sensible settings (like auto gofmt on save), has autocomplete, snippet
support, improved syntax highlighting, go toolchain commands, etc... It's
highly customizable and each individual feature can be disabled/enabled
easily.
* Improved Syntax highlighting, such as Functions, Operators, Methods..
* Auto completion support via `gocode`
* Better `gofmt` on save, keeps cursor position and doesn't break your undo
history
* Go to symbol/declaration with `godef`
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* Look up documentation with `godoc` inside Vim or open it in browser.
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* Automatically import packages via `goimports`
* Compile and `go build` your package, install it with `go install`
* `go run` quickly your current file/files
* Run `go test` and see any errors in quickfix window
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* Create a coverage profile and display annotated source code in browser to
see which functions are covered.
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* Lint your code with `golint`
* Run your code trough `go vet` to catch static errors.
* Advanced source analysis tool with `oracle`
* Precise type-safe renaming of identifiers with `gorename`
* List all source files and dependencies
* Checking with `errcheck` for unchecked errors.
* Integrated and improved snippets. Supports `ultisnips` or `neosnippet`
* Share your current code to play.golang.org
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* On-the-fly type information about the word under the cursor
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* Tagbar support to show tags of the source code in a sidebar with `gotags`
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* Custom vim text objects, such a `a function` or `inner function`
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===============================================================================
INSTALL *go-install*
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Vim-go follows the standard runtime path structure, so I highly recommend to use
a common and well known plugin manager to install vim-go. Do not use vim-go with
other Go plugins. For Pathogen just clone the repo, for other plugin managers
add the appropriate lines and execute the plugin's install command.
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* https://github.com/tpope/vim-pathogen >
git clone https://github.com/fatih/vim-go.git ~/.vim/bundle/vim-go
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<
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* https://github.com/junegunn/vim-plug >
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Plug 'fatih/vim-go'
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<
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* https://github.com/Shougo/neobundle.vim >
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NeoBundle 'fatih/vim-go'
<
* https://github.com/gmarik/vundle >
Plugin 'fatih/vim-go'
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<
* Manual >
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Copy all of the files into your `~/.vim` directory
<
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Please be sure all necessary binaries are installed (such as `gocode`, `godef`,
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`goimports`, etc..). You can easily install them with the included
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|GoInstallBinaries| command. If you invoke it, all necessary binaries will be
automatically downloaded and installed to your `$GOBIN` environment (if not set
it will use `$GOPATH/bin`). It requires `git` for fetching the individual Go
packages.
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* Autocompletion is enabled by default via `<C-x><C-o>`, to get real-time
completion (completion by type) install:
https://github.com/Valloric/YouCompleteMe or
https://github.com/Shougo/neocomplete.vim
* To get displayed source code tag informations on a sidebar install
https://github.com/majutsushi/tagbar.
* For snippet feature install:
https://github.com/SirVer/ultisnips or
https://github.com/Shougo/neosnippet.vim.
===============================================================================
COMMANDS *go-commands*
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*:GoPath*
:GoPath [path]
GoPath sets and ovverides GOPATH with the given {path}. If no {path} is
given it shows the current GOPATH. If `""` is given as path, it clears
current `GOPATH` which was set with |GoPath| and restores `GOPATH` back to
the inital value which was sourced when Vim was started.
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*:GoImport*
:GoImport [path]
Import ensures that the provided package {path} is imported in the current
Go buffer, using proper style and ordering. If {path} is already being
imported, an error will be displayed and the buffer will be untouched.
*:GoImportAs*
:GoImportAs [localname] [path]
Same as Import, but uses a custom local name for the package.
*:GoDrop*
:GoDrop [path]
Remove the import line for the provided package {path}, if present in the
current Go buffer. If {path} is not being imported, an error will be
displayed and the buffer will be untouched.
*:GoLint*
:GoLint
Run golint for the current Go file.
*:GoDoc*
:GoDoc [word]
Open the relevant GoDoc in split window for either the word[s] passed to
the command or by default, the word under the cursor.
*:GoDocBrowser*
:GoDocBrowser [word]
Open the relevant GoDoc in browser for either the word[s] passed to the
command or by default, the word under the cursor.
*:GoFmt*
:GoFmt
Filter the current Go buffer through gofmt. It tries to preserve cursor
position and avoids replacing the buffer with stderr output.
*:GoImports*
:GoImports
Filter the current Go buffer through goimports (needs to be installed).
`goimports` automatically discards/add import path based on the code. Like
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|GoFmt|, It tries to preserve cursor position and avoids replacing the
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buffer with stderr output.
*:GoPlay*
:[range]GoPlay
Share snippet to play.golang.org. If no [range] is given it shares
the whole file, otherwise the selected lines are shared. Snippet URL
is copied to system clipboard if Vim is compiled with 'clipboard' or
'xterm-clipboard' otherwise it's get yanked into the `""` register.
*:GoVet*
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:GoVet[!]
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Run `go vet` for the directory under your current file. Vet examines Go
source code and reports suspicious constructs, such as Printf calls whose
arguments do not align with the format string. Vet uses heuristics that do not
guarantee all reports are genuine problems, but it can find errors not caught
by the compilers.
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If [!] is not given the first error is jumped to.
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*:GoDef*
:GoDef [identifier]
Goto declaration/definition for the given [identifier]. If no argument is
given, it will jump to the declaration under the cursor. By default the
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mapping `gd` is enabled to invoke GoDef for the identifier under the cursor.
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See |g:go_def_mapping_enabled| to disable it.
*:GoRun*
:GoRun[!] [expand]
Build and run your current main package. By default all main files for the
current file is used. If an argument is passed, 'expand' is used as file
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selector. For example use `:GoRun %` to select the current file only.
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If [!] is not given the first error is jumped to.
*:GoBuild*
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:GoBuild[!] [options]
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Build your package with `go build`. It automatically builds only the files
that depends on the current file. GoBuild doesn't produce a result file.
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Use 'make' to create a result file.
You may optionally pass any valid go build flags/options. For a full list
please see `go help build`.
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If [!] is not given the first error is jumped to.
*:GoGenerate*
:GoGenerate[!] [options]
Creates or updates your auto-generated source files by running `go
generate`.
You may optionally pass any valid go generate flags/options. For a full list
please see `go help generate`.
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If [!] is not given the first error is jumped to.
*:GoInfo*
:GoInfo
Show type information about the identifer under the cursor. For example
putting it above a function call is going to show the full function
signature. It uses gocode to get the type informations.
*:GoInstall*
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:GoInstall[!]
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Install your package with `go install`.
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If [!] is not given the first error is jumped to.
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*:GoTest*
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:GoTest[!] [expand]
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Run the tests on your _test.go files via in your current directory. Errors
are populated in quickfix window. If an argument is passed, 'expand' is
used as file selector (useful for cases like `:GoTest ./...`).
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If [!] is not given the first error is jumped to.
*:GoTestFunc*
:GoTestFunc[!] [expand]
Runs :GoTest, but only on the single test function immediate to your
cursor using 'go test's '-run' flag.
Lookup is done starting at the cursor (including that line) moving up till
a matching `func Test` pattern is found or top of file is reached. Search
will not wrap around when at the top of the file.
If [!] is not given the first error is jumped to.
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*:GoTestCompile*
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:GoTestCompile[!] [expand]
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Compile your _test.go files via in your current directory. Errors are
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populated in quickfix window. If an argument is passed, 'expand' is used
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as file selector (useful for cases like `:GoTest ./...`). Useful to not
run the tests and capture/fix errors before running the tests or to
create test binary.
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If [!] is not given the first error is jumped to.
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*:GoCoverage*
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:GoCoverage[!]
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Create a coverage profile and open a browser to display the annotated
source code of the current package.
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If [!] is not given the first error is jumped to.
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*:GoErrCheck*
:GoErrCheck
Check for unchecked errors in you current package. Errors are populated in
quickfix window.
*:GoFiles*
:GoFiles
Show source files that depends for the current package
*:GoDeps*
:GoDeps
Show dependencies for the current package
*:GoInstallBinaries*
:GoInstallBinaries
Download and Install all necessary Go tool binaries such as `godef`,
`goimports`, `gocode`, etc.. under `g:go_bin_path`
*:GoUpdateBinaries*
:GoUpdateBinaries
Download and Update previously installed Go tool binaries such as `godef`,
`goimports`, `gocode`, etc.. under `g:go_bin_path`. This can be used to
update the necessary Go binaries.
*:GoImplements*
:GoImplements
Show 'implements' relation for a selected package. A list of interfaces
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for the type that implements an interface under the cursor (or selected
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package) is shown quickfix list.
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*:GoRename*
:GoRename [to]
Rename the identifier under the cursor to the desired new name. If no
argument is given a prompt will ask for the desired identifier.
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*:GoOracleScope*
:GoOracleScope [path1] [path2] ...
Changes the custom |g:go_oracle_scope| setting and overrides it with the
given import paths. The custom scope is cleared (unset) if `""` is given
as the only path. If no arguments is given it prints the current custom
scope.
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*:GoCallees*
:GoCallees
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Show 'callees' relation for a selected package. A list of possible call
targets for the type under the cursor (or selected package) is shown in a
quickfix list.
*:GoCallers*
:GoCallers
Show 'callers' relation for a selected function. A list of possible
callers for the selected function under the cursor is shown in a quickfix
list.
*:GoDescribe*
:GoDescribe
Shows various properties of the selected syntax: its syntactic kind, its
type (for an expression), its value (for a constant expression), its size,
alignment, method set and interfaces (for a type), its declaration (for an
identifier), etc. Almost any piece of syntax may be described, and the
oracle will try to print all the useful information it can.
*:GoCallstack*
:GoCallstack
Shows 'callstack' relation for the selected function. An arbitrary path
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from the root of the callgraph to the selected function is showed in a
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quickfix list. This may be useful to understand how the function is
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reached in a given program.
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*:GoFreevars*
:GoFreevars
Enumerates the free variables of the selection. “Free variables” is a
technical term meaning the set of variables that are referenced but not
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defined within the selection, or loosely speaking, its inputs.
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This information is useful if youre considering whether to refactor the
selection into a function of its own, as the free variables would be the
necessary parameters of that function. Its also useful when you want to
understand what the inputs are to a complex block of code even if you
dont plan to change it.
*:GoChannelPeers*
:GoChannelPeers
Shows the set of possible sends/receives on the channel operand of the
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selected send or receive operation; the selection must be a <- token.
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For example, visually select a channel operand in the form of:
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"done <- true"
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and call |GoChannelPeers| on it. It will show where it was allocated, and
the sending and receiving endings.
*:GoReferrers*
:GoReferrers
The referrers query shows the set of identifiers that refer to the same
object as does the selected identifier, within any package in the analysis
scope.
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===============================================================================
MAPPINGS *go-mappings*
vim-go has several <Plug> keys which can be used to create custom mappings
For example, to create a mapping that `go run` the current file create a
mapping for the `(go-run)`: >
au FileType go nmap <leader>r <Plug>(go-run)
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As always one is free to create more advanced mappings or functions based with
|go-commands|. For more information please check out the mappings command
documentation in the |go-commands| section. Available <Plug> keys are:
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*(go-run)*
Calls `go run` for the current file
*(go-build)*
Calls `go build` for the current package
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*(go-generate)*
Calls `go generate` for the current package
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*(go-info)*
Shows type information for the word under the cursor
*(go-install)*
Calls `go install` for the current package
*(go-test)*
Calls `go test` for the current package
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*(go-test-func)*
Calls `go test -run '...'` for the test function immediate to cursor
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*(go-test-compile)*
Calls `go test -c` for the current package
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*(go-coverage)*
Calls `go test -coverprofile-temp.out` for the current package
*(go-vet)*
Calls `go vet` for the current package
*(go-files)*
Show source files that depends for the current package
*(go-deps)*
Show dependencies for the current package
*(go-doc)*
Show the relevant GoDoc for the word under the cursor in a split window
leftabove (default mode).
*(go-doc-split)*
Show the relevant GoDoc for the word under the cursor in a split window.
*(go-doc-vertical)*
Show the relevant GoDoc for the word under the cursor in a vertical split
window.
*(go-doc-tab)*
Show the relevant GoDoc for the word under the cursor in a tab window.
*(go-doc-browser)*
Show the relevant GoDoc for the word under in browser
*(go-def)*
Goto declaration/definition. Results are shown in the current buffer.
*(go-def-split)*
Goto declaration/definition. Results are shown in a split window.
*(go-def-vertical)*
Goto declaration/definition. Results are shown in a vertical split window.
*(go-def-tab)*
Goto declaration/definition. Results are shown in a tab window.
*(go-implements)*
Show the interfaces that the type under the cursor implements.
*(go-rename)*
Rename the identifier under the cursor to the desired new name
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*(go-callees)*
Show the call targets for the type under the cursor
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*(go-callers)*
Show possible callers of selected function
*(go-describe)*
Describe selected syntax: definition, methods, etc
*(go-callstack)*
Show path from callgraph root to selected function
*(go-freevars)*
Show free variables of selection
*(go-channelpeers)*
Show send/receive corresponding to selected channel op
*(go-referrers)*
Show all refs to entity denoted by selected identifier
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===============================================================================
TEXT OBJECTS *go-text-objects*
vim-go comes with several custom |text-objects| that can be used to operate
upon regions of text. vim-go currently defines the following text objects:
*go-v_af* *go-af*
af "a function", select contents from a function definition to the
closing bracket.
*go-v_if* *go-if*
if "inside a function", select contents of a function,
excluding the function definition and the closing bracket.
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===============================================================================
SETTINGS *go-settings*
*'g:go_play_browser_command'*
Use this option to change the browser that is used to open the snippet url
posted to play.golang.org with |:GoPlay| or for the relevant documentation
used with |:GoDocBrowser|. By default it tries to find it automatically for
the current OS. >
let g:play_browser_command = ''
<
*'g:go_play_open_browser'*
Use this option to open browser after posting the snippet to play.golang.org
with |:GoPlay|. By default it's enabled. >
let g:go_play_open_browser = 1
<
*'g:go_auto_type_info'*
Use this option to show the type info (|:GoInfo|) for the word under the cursor
automatically. Whenever the cursor changes the type info will be updated.
By default it's disabled >
let g:go_auto_type_info = 0
<
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*'g:go_jump_to_error'*
Use this option to enable/disable passing the bang attribute to the mappings
|(go-build)|, |(go-run)|, etc.. When enabled it will jump to the first error
automatically (means it will NOT pass the bang attribute to the appropriate
command, i.e: (go-run) -> :GoRun ). Note, that calling this doesn't have any
affect on calling the commands manually. This setting is only useful for
changing the behaviour of our custom static mappings. By default it's enabled.
>
let g:go_jump_to_error = 1
<
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*'g:go_fmt_autosave'*
Use this option to auto |:GoFmt| on save. By default it's enabled >
let g:go_fmt_autosave = 1
<
*'g:go_fmt_command'*
Use this option to define which tool is used to gofmt. By default `gofmt` is
used >
let g:go_fmt_command = "gofmt"
<
*'g:go_fmt_options'*
Use this option to add additional options to the |g:go_fmt_command|. Default
is empty. >
let g:go_fmt_options = ''
<
*'g:go_fmt_fail_silently'*
Use this option to disable showing a quickfix window when |g:go_fmt_command|
fails. By default it's disabled. >
let g:go_fmt_fail_silently = 0
<
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*'g:go_fmt_experimental'*
Use this option to enable fmt's experimental mode. This experimental mode is
superior to the current mode as it fully saves the undo history, so undo/redo
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doesn't break. However it's slows (creates/deletes a file for every save) and
it's causing problems on some Vim versions. By default it's disabled. >
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let g:go_fmt_experimental = 0
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<
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*'g:go_doc_keywordprg_enabled'*
Use this option to change the enable GoDoc to run on words under the cursor
with the default K , keywordprg shortcut. This shortcut is by default set to
use the program man. However in go using godoc is more idiomatic. Default is
enabled. >
let g:go_doc_keywordprg_enabled = 1
<
*'g:go_def_mapping_enabled'*
Use this option to enabled/ disable the default mapping (`gd`) for GoDef
enabled. Disabling it allows you to map something else to the mapping `gd`.
Default is enabled. >
let g:go_def_mapping_enabled = 1
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<
*'g:go_dispatch_enabled'*
Use this option to enable/disable the use of Dispatch to execute the
`:GoRun`, `:GoBuild` and `:GoGenerate` commands. More information about Dispatch is
available at https://github.com/tpope/vim-dispatch. Default is disabled. >
let g:go_dispatch_enabled = 0
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<
*'g:go_doc_command'*
Use this option to define which tool is used to godoc. By default `godoc` is
used >
let g:go_doc_command = "godoc"
<
*'g:go_doc_options'*
Use this option to add additional options to the |g:go_doc_command|. Default
is empty. >
let g:go_doc_options = ''
< *'g:go_bin_path'*
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Use this option to change default path for vim-go tools when using
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|GoInstallBinaries| and |GoUpdateBinaries|. If not set `$GOBIN` or
`$GOPATH/bin` is used. >
let g:go_bin_path = ""
<
*'g:go_snippet_engine'*
Use this option to define the default snippet engine. By default "ultisnips"
is used. Use "neosnippet" for neosnippet.vim: >
let g:go_snippet_engine = "ultisnips"
<
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*'g:go_oracle_scope'*
Use this option to define the scope of the analysis to be passed for Oracle
related commands, such as |GoImplements|, |GoCallers|, etc.. By default it's
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not set, so only the current packages go files are passed as scope. You can
change it on-the-fly with |GoOracleScope|. For more
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info please have look at Oracle's User Manual:
https://docs.google.com/document/d/1SLk36YRjjMgKqe490mSRzOPYEDe0Y_WQNRv-EiFYUyw/view#heading=h.nwso96pj07q8
>
let g:go_oracle_scope = ''
<
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*'g:go_highlight_array_whitespace_error'*
Highlights white space after "[]". >
let g:go_highlight_array_whitespace_error = 1
<
*'g:go_highlight_chan_whitespace_error'*
Highlights white space around the communications operator that don't follow
the standard style. >
let g:go_highlight_chan_whitespace_error = 1
<
*'g:go_highlight_extra_types'*
Highlights commonly used library types (io.Reader, etc.). >
let g:go_highlight_extra_types = 1
<
*'g:go_highlight_space_tab_error'*
Highlights instances of tabs following spaces. >
let g:go_highlight_space_tab_error = 1
<
*'g:go_highlight_trailing_whitespace_error'*
Highlights trailing white space. >
let g:go_highlight_trailing_whitespace_error = 1
<
*'g:go_highlight_operators'*
Highlights operators such as `:=` , `==`, `-=`, etc ...By default it's
disabled. >
let g:go_highlight_operators = 0
<
*'g:go_highlight_functions'*
Highlights function names. By default it's disabled. >
let g:go_highlight_functions = 0
<
*'g:go_highlight_methods'*
Highlights method names. By default it's disabled. >
let g:go_highlight_methods = 0
<
*'g:go_highlight_structs'*
Highlights struct names. By default it's disabled. >
let g:go_highlight_structs = 0
2015-02-04 10:43:54 +00:00
<
*'g:go_highlight_build_constraints'*
Highlights build constraints. By default it's disabled. >
let g:go_highlight_build_constraints = 0
2014-10-31 21:30:24 +00:00
<
2015-07-13 10:22:46 +00:00
*'g:go_autodetect_gopath'*
Automatically modifies GOPATH for certain directory structures, such as for
the tool godep which has his own dependencies via the `Godeps` folder. What
this means is that all tools are now working with the newly modified GOPATH.
So |GoDef| for example jumps to the source inside the `Godeps` (vendored)
source. Currently only `godep` is supported, in the near future more tool
supports will be added. By default it's enabled. >
let g:go_autodetect_gopath = 1
<
2015-01-18 12:58:28 +00:00
*'g:go_textobj_enabled'*
Adds custom text objects. By default it's enabled. >
let g:go_textobj_enabled = 1
2015-07-13 10:22:46 +00:00
2014-10-31 21:30:24 +00:00
===============================================================================
TROUBLESHOOTING *go-troubleshooting*
I'm using Fish shell but have some problems using Vim-go~
First environment variables in Fish are applied differently, it should be like:
>
set -x GOPATH /your/own/gopath
<
Second, Vim needs a POSIX compatible shell (more info here:
https://github.com/dag/vim-fish#teach-a-vim-to-fish). If you use Fish to open
vim, it will make certainx shell based commands fail (means vim-go will fail
too). To overcome this problem change the default shell by adding the
following into your .vimrc (on the top of the file):
>
if $SHELL =~ 'fish'
set shell='/bin/sh'
endif
<
or
>
set shell='/bin/sh'
>
2015-03-14 20:02:10 +00:00
I'm seeing weirds errors during installation of binaries with
GoInstallBinaries:
2014-10-31 21:30:24 +00:00
If you see errors like this:
>
Error installing code.google.com/p/go.tools/cmd/goimports:
Error installing code.google.com/p/rog-go/exp/cmd/godef:
<
that means your local Go setup is broken or the remote website is down. For
example sometimes code.google.com times out. To test, just execute a simple go
get:
>
go get code.google.com/p/go.tools/cmd/goimports
<
You'll see a more detailed error. If this works, vim-go will work too.
===============================================================================
CREDITS *go-credits*
* Go Authors for offical vim plugins
* Gocode, Godef, Golint, Oracle, Goimports, Errcheck projects and authors of
those projects.
* Other vim-plugins, thanks for inspiration (vim-golang, go.vim, vim-gocode,
vim-godef)
* vim-go contributors: https://github.com/fatih/vim-go/graphs/contributors
vim:ft=help:et:ts=2:sw=2:sts=2:norl