home/rc/extra/go-tools.kak

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# Provides integration of the following tools:
# - gocode for code completion (github.com/nsf/gocode)
# - goimports for code formatting on save
# - gogetdoc for documentation display and source jump (needs jq) (github.com/zmb3/gogetdoc)
# Needs the following tools in the path:
# - jq for json deserializaton
evaluate-commands %sh{
for dep in gocode goimports gogetdoc jq; do
if ! command -v $dep > /dev/null 2>&1; then
echo "echo -debug %{Dependency unmet: $dep, please install it to use go-tools}"
fi
done
}
# Auto-completion
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
declare-option -hidden str go_complete_tmp_dir
declare-option -hidden completions gocode_completions
define-command go-complete -docstring "Complete the current selection with gocode" %{
evaluate-commands %sh{
dir=$(mktemp -d "${TMPDIR:-/tmp}"/kak-go.XXXXXXXX)
printf %s\\n "set-option buffer go_complete_tmp_dir ${dir}"
printf %s\\n "evaluate-commands -no-hooks write ${dir}/buf"
}
nop %sh{
dir=${kak_opt_go_complete_tmp_dir}
(
gocode_data=$(gocode -f=godit --in=${dir}/buf autocomplete ${kak_cursor_byte_offset})
rm -r ${dir}
column_offset=$(printf %s "${gocode_data}" | head -n1 | cut -d, -f1)
header="${kak_cursor_line}.$((${kak_cursor_column} - $column_offset))@${kak_timestamp}"
compl=$(echo "${gocode_data}" | sed 1d | awk -F ",," '{
gsub(/~/, "~~", $1)
gsub(/~/, "~~", $2)
print "%~" $2 "||" $1 "~"
}' | paste -s -)
printf %s\\n "evaluate-commands -client '${kak_client}' %{
set-option 'buffer=${kak_bufname}' gocode_completions ${header} ${compl}
}" | kak -p ${kak_session}
) > /dev/null 2>&1 < /dev/null &
}
}
define-command go-enable-autocomplete -docstring "Add gocode completion candidates to the completer" %{
set-option window completers "option=gocode_completions" %opt{completers}
hook window -group go-autocomplete InsertIdle .* %{ try %{
execute-keys -draft <a-h><a-k>[\w\.].\z<ret>
go-complete
} }
alias window complete go-complete
}
define-command go-disable-autocomplete -docstring "Disable gocode completion" %{
set-option window completers %sh{ printf %s\\n "${kak_opt_completers}" | sed "s/'option=gocode_completions'//g" }
remove-hooks window go-autocomplete
unalias window complete go-complete
}
# Auto-format
# ‾‾‾‾‾‾‾‾‾‾‾
declare-option -hidden str go_format_tmp_dir
define-command -params ..1 go-format \
-docstring "go-format [-use-goimports]: custom formatter for go files" %{
evaluate-commands %sh{
dir=$(mktemp -d "${TMPDIR:-/tmp}"/kak-go.XXXXXXXX)
printf %s\\n "set-option buffer go_format_tmp_dir ${dir}"
printf %s\\n "evaluate-commands -no-hooks write ${dir}/buf"
}
evaluate-commands %sh{
dir=${kak_opt_go_format_tmp_dir}
if [ "$1" = "-use-goimports" ]; then
fmt_cmd="goimports -srcdir '${kak_buffile}'"
else
fmt_cmd="gofmt -s"
fi
eval "${fmt_cmd} -e -w ${dir}/buf 2> ${dir}/stderr"
if [ $? ]; then
cp ${dir}/buf "${kak_buffile}"
else
# we should report error if linting isn't active
printf %s\\n "echo -debug '$(cat ${dir}/stderr)'"
fi
rm -r ${dir}
}
edit!
}
# Documentation
# ‾‾‾‾‾‾‾‾‾‾‾‾‾
declare-option -hidden str go_doc_tmp_dir
# FIXME text escaping
define-command -hidden -params 1..2 gogetdoc-cmd %{
evaluate-commands %sh{
dir=$(mktemp -d "${TMPDIR:-/tmp}"/kak-go.XXXXXXXX)
printf %s\\n "set-option buffer go_doc_tmp_dir ${dir}"
printf %s\\n "evaluate-commands -no-hooks write ${dir}/buf"
}
evaluate-commands %sh{
dir=${kak_opt_go_doc_tmp_dir}
(
printf %s\\n "${kak_buffile}" > ${dir}/modified
cat ${dir}/buf | wc -c >> ${dir}/modified
cat ${dir}/buf >> ${dir}/modified
if [ "$2" = "1" ]; then
args="-json"
fi
output=$(cat ${dir}/modified \
| gogetdoc $args -pos "${kak_buffile}:#${kak_cursor_byte_offset}" -modified \
| sed 's/%/%%/g')
rm -r ${dir}
printf %s "${output}" | grep -v -q "^gogetdoc: "
status=$?
case "$1" in
"info")
if [ ${status} -eq 0 ]; then
printf %s\\n "evaluate-commands -client '${kak_client}' %{
info -anchor ${kak_cursor_line}.${kak_cursor_column} %@${output}@
}" | kak -p ${kak_session}
else
msg=$(printf %s "${output}" | cut -d' ' -f2-)
printf %s\\n "evaluate-commands -client '${kak_client}' %{
echo '${msg}'
}" | kak -p ${kak_session}
fi
;;
"echo")
if [ ${status} -eq 0 ]; then
signature=$(printf %s "${output}" | sed -n 3p)
printf %s\\n "evaluate-commands -client '${kak_client}' %{
echo '${signature}'
}" | kak -p ${kak_session}
fi
;;
"jump")
if [ ${status} -eq 0 ]; then
pos=$(printf %s "${output}" | jq -r .pos)
file=$(printf %s "${pos}" | cut -d: -f1)
line=$(printf %s "${pos}" | cut -d: -f2)
col=$(printf %s "${pos}" | cut -d: -f3)
printf %s\\n "evaluate-commands -client '${kak_client}' %{
evaluate-commands -try-client '${kak_opt_jumpclient}' edit -existing ${file} ${line} ${col}
try %{ focus '${kak_opt_jumpclient}' }
}" | kak -p ${kak_session}
fi
;;
*)
printf %s\\n "evaluate-commands -client '${kak_client}' %{
echo -error %{unkown command '$1'}
}" | kak -p ${kak_session}
;;
esac
) > /dev/null 2>&1 < /dev/null &
}
}
define-command go-doc-info -docstring "Show the documention of the symbol under the cursor" %{
gogetdoc-cmd "info"
}
define-command go-print-signature -docstring "Print the signature of the symbol under the cursor" %{
gogetdoc-cmd "echo"
}
define-command go-jump -docstring "Jump to the symbol definition" %{
gogetdoc-cmd "jump" 1
}
define-command go-share-selection -docstring "Share the selection using the Go Playground" %{ evaluate-commands %sh{
snippet_id=$(printf %s\\n "${kak_selection}" | curl -s https://play.golang.org/share --data-binary @-)
printf "echo https://play.golang.org/p/%s" ${snippet_id}
} }