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Generate a compilation database for YCM / ccls, ...

clang has built-in support for generating the compile_commands.json Simply compile each file using the flag -MJ file.o.json. E.g., when compiling using a Makefile, add to the CFLAGS -MJ [email protected]

To coalesce all jsons file in a single compile_commands.json, use:

sed -e '1s/^/[\n/' -e '$s/,$/\n]/' output/**/*.o.json > compile_commands.json

Legacy:

bear
compiledb make ...

vimdiff

]c               - advance to the next block with differences
[c               - reverse search for the previous block with differences
do (diff obtain) - bring changes from the other file to the current file
dp (diff put)    - send changes from the current file to the other file
zo               - unfold/unhide text
zc               - refold/rehide text
zr               - unfold both files completely
zm               - fold both files completely

Paste yanked into command mode

CTRL-r " (CTRL-r will show ", pressing " will change " into the yanked value)

Save as sudo

:w !sudo tee %

Insert with Visual block mode ()

Use Shift+i, type your stuff (will only edit one line), (will repeat to all the other lines).

Sroll keeping the cursor line on the same line

<C-e>: scroll down <C-y>: scroll up

Jump to a tag

:ta TAG-NAME (aka tag): jump to a tag, same as CTRL-].

When there are many instances of the same tag and you need to pick one (e.g. function declaration and definition):

:ts TAG-NAME (aka tselect)
:tj TAG-NAME (aka tjump)
g] TAG-NAME

Undoing to previous versions of a file unreachable with u and r

Pick a number from :undolist, and undo with :undo {N}.

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