diff --git a/rc/extra/go-tools.kak b/rc/extra/go-tools.kak new file mode 100644 index 00000000..b5efb355 --- /dev/null +++ b/rc/extra/go-tools.kak @@ -0,0 +1,170 @@ +# 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 + +# Auto-completion +# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ + +decl -hidden str go_complete_tmp_dir +decl -hidden completions gocode_completions + +def go-complete -docstring "Complete the current selection with gocode" %{ + %sh{ + dir=$(mktemp -d -t kak-go.XXXXXXXX) + printf %s\\n "set buffer go_complete_tmp_dir ${dir}" + printf %s\\n "eval -no-hooks write ${dir}/buf" + } + %sh{ + dir=${kak_opt_go_complete_tmp_dir} + ( + gocode_data=$(gocode -f=godit --in=${dir}/buf autocomplete ${kak_cursor_byte_offset}) + rm -r ${dir} + column_offset=$(echo "${gocode_data}" | head -n1 | cut -d, -f1) + + header="${kak_cursor_line}.$((${kak_cursor_column} - $column_offset))@${kak_timestamp}" + compl=$(echo "${gocode_data}" | sed 1d | awk -F ",," '{print $2 "||" $1}' | paste -s -d: -) + printf %s\\n "eval -client '${kak_client}' %{ + set buffer=${kak_bufname} gocode_completions '${header}:${compl}' + }" | kak -p ${kak_session} + ) > /dev/null 2>&1 < /dev/null & + } +} + +def go-enable-autocomplete -docstring "Add gocode completion candidates to the completer" %{ + set window completers "option=gocode_completions:%opt{completers}" + hook window -group go-autocomplete InsertIdle .* %{ try %{ + exec -draft [\w\.].\z + go-complete + } } + alias window complete go-complete +} + +def go-disable-autocomplete -docstring "Disable gocode completion" %{ + set window completers %sh{ printf %s\\n "'${kak_opt_completers}'" | sed 's/option=gocode_completions://g' } + rmhooks window go-autocomplete + unalias window complete go-complete +} + +# Auto-format +# ‾‾‾‾‾‾‾‾‾‾‾ + +decl -hidden str go_format_tmp_dir + +def -params ..1 go-format \ + -docstring "go-format [-use-goimports]: custom formatter for go files" %{ + %sh{ + dir=$(mktemp -d -t kak-go.XXXXXXXX) + printf %s\\n "set buffer go_format_tmp_dir ${dir}" + printf %s\\n "eval -no-hooks write ${dir}/buf" + } + %sh{ + dir=${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 ${dir} + } + edit! +} + +# Documentation +# ‾‾‾‾‾‾‾‾‾‾‾‾‾ + +decl -hidden str go_doc_tmp_dir + +# FIXME text escaping +def -hidden -params 1..2 _gogetdoc-cmd %{ + %sh{ + dir=$(mktemp -d -t kak-go.XXXXXXXX) + printf %s\\n "set buffer go_doc_tmp_dir ${dir}" + printf %s\\n "eval -no-hooks write ${dir}/buf" + } + %sh{ + dir=${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 [ ${status} -eq 0 ]; then + printf %s\\n "eval -client '${kak_client}' %{ + info -anchor ${kak_cursor_line}.${kak_cursor_column} %@${output}@ + }" | kak -p ${kak_session} + else + msg=$(printf %s "${output}" | cut -d' ' -f2-) + printf %s\\n "eval -client '${kak_client}' %{ + echo '${msg}' + }" | kak -p ${kak_session} + fi + ;; + "echo") + if [ ${status} -eq 0 ]; then + signature=$(printf %s "${output}" | sed -n 3p) + printf %s\\n "eval -client '${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 "${pos}" | cut -d: -f3) + printf %s\\n "eval -client '${kak_client}' %{ + eval -try-client '${kak_opt_jumpclient}' edit -existing ${file} ${line} ${col} + try %{ focus '${kak_opt_jumpclient}' } + }" | kak -p ${kak_session} + fi + ;; + *) + printf %s\\n "eval -client '${kak_client}' %{ + echo -error %{unkown command '$1'} + }" | kak -p ${kak_session} + ;; + + esac + ) > /dev/null 2>&1 < /dev/null & + } +} + +def go-doc-info -docstring "Show the documention of the symbol under the cursor" %{ + _gogetdoc-cmd "info" +} + +def go-print-signature -docstring "Print the signature of the symbol under the cursor" %{ + _gogetdoc-cmd "echo" +} + +def go-jump -docstring "Jump to the symbol definition" %{ + _gogetdoc-cmd "jump" 1 +} + +def go-share-selection -docstring "Share the selection using the Go Playground" %{ %sh{ + snippet_id=$(printf %s\\n "${kak_selection}" | curl -s https://play.golang.org/share --data-binary @-) + printf "echo https://play.golang.org/p/%s" ${snippet_id} +} }