kakoune/rc/base/lint.kak

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# your linter should output in this format:
# {filename}:{line}:{column}: {kind}: {message}
decl str lintcmd
decl -hidden line-flags lint_flags
decl -hidden str lint_errors
def lint -docstring 'Parse the current buffer with a linter' %{
%sh{
dir=$(mktemp -d -t kak-lint.XXXXXXXX)
mkfifo "$dir"/fifo
printf '%s\n' "eval -no-hooks write $dir/buf"
printf '%s\n' "eval -draft %{
edit! -fifo $dir/fifo *lint-output*
set buffer filetype make
set buffer make_current_error_line 0
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hook -group fifo buffer BufCloseFifo .* %{
nop %sh{ rm -r '$dir' }
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remove-hooks buffer fifo
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}
}"
{ # do the parsing in the background and when ready send to the session
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eval "$kak_opt_lintcmd '$dir'/buf" | sort -t: -k2,2 -n > "$dir"/stderr
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printf '%s\n' "eval -client $kak_client echo 'linting done'" | kak -p "$kak_session"
# Flags for the gutter:
# line3|{red}:line11|{yellow}
# Contextual error messages:
# l1,c1,err1
# ln,cn,err2
awk -F: -v file="$kak_buffile" -v stamp="$kak_timestamp" '
/:[0-9]+:[0-9]+: ([Ff]atal )?[Ee]rror/ {
flags = flags $2 "|{red}█:"
}
/:[0-9]+:[0-9]+:/ {
if ($4 !~ /[Ee]rror/) {
flags = flags $2 "|{yellow}█:"
}
}
/:[0-9]+:[0-9]+:/ {
errors = errors $2 "," $3 "," substr($4,2) ":"
# fix case where $5 is not the last field because of extra :s in the message
for (i=5; i<=NF; i++) errors = errors $i ":"
errors = substr(errors, 1, length(errors)-1) "\n"
}
END {
print "set \"buffer=" file "\" lint_flags %{" stamp ":" substr(flags, 1, length(flags)-1) "}"
errors = substr(errors, 1, length(errors)-1)
gsub("~", "\\~", errors)
print "set \"buffer=" file "\" lint_errors %~" errors "~"
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}
' "$dir"/stderr | kak -p "$kak_session"
cut -d: -f2- "$dir"/stderr | sed "s@^@$kak_bufname:@" > "$dir"/fifo
} >/dev/null 2>&1 </dev/null &
}
}
def -hidden lint-show %{ %sh{
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desc=$(printf '%s\n' "$kak_opt_lint_errors" | sed -ne "/^$kak_cursor_line,.*/ { s/^[[:digit:]]\+,[[:digit:]]\+,//g; s/'/\\\\'/g; p; }")
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if [ -n "$desc" ]; then
printf '%s\n' "info -anchor $kak_cursor_line.$kak_cursor_column '$desc'"
fi
}}
def lint-enable -docstring "Activate automatic diagnostics of the code" %{
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add-highlighter flag_lines default lint_flags
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hook window -group lint-diagnostics NormalIdle .* %{ lint-show }
}
def lint-disable -docstring "Disable automatic diagnostics of the code" %{
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remove-highlighter hlflags_lint_flags
remove-hooks window lint-diagnostics
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}
def lint-next -docstring "Jump to the next line that contains an error" %{ %sh{
printf '%s\n' "$kak_opt_lint_errors" | {
while read -r line
do
# get line,column pair
coords=$(printf %s "$line" | cut -d, -f1,2)
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candidate="${coords%,*}"
if [ "$candidate" -gt "$kak_cursor_line" ]
then
break
fi
done
if [ "$candidate" -gt "$kak_cursor_line" ]
then
col="${coords#*,}"
else
candidate="${kak_opt_lint_errors%%,*}"
col=$(printf '%s\n' "$kak_opt_lint_errors" | head -n1 | cut -d, -f2)
fi
printf '%s\n' "select $candidate.$col,$candidate.$col"
}
}}
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def lint-prev -docstring "Jump to the previous line that contains an error" %{ %sh{
printf '%s\n' "$kak_opt_lint_errors" | sort -t, -k1,1 -rn | {
while read -r line
do
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coords=$(printf %s "$line" | cut -d, -f1,2)
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candidate="${coords%,*}"
if [ "$candidate" -lt "$kak_cursor_line" ]
then
break
fi
done
if [ "$candidate" -lt "$kak_cursor_line" ]
then
col="${coords#*,}"
else
last=$(printf '%s\n' "$kak_opt_lint_errors" | tail -n1)
candidate=$(printf '%s\n' "$last" | cut -d, -f1)
col=$(printf '%s\n' "$last" | cut -d, -f2)
fi
printf '%s\n' "select $candidate.$col,$candidate.$col"
}
}}