From 590e28ea7f77fa30567554c93319d89dd7913190 Mon Sep 17 00:00:00 2001
From: Martin Chaine <martin@casimir.me>
Date: Mon, 3 Oct 2016 22:56:29 +0200
Subject: [PATCH 1/3] Extended support for go

completion, auto-format, documentation and more
---
 rc/extra/go-tools.kak | 182 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 182 insertions(+)
 create mode 100644 rc/extra/go-tools.kak

diff --git a/rc/extra/go-tools.kak b/rc/extra/go-tools.kak
new file mode 100644
index 00000000..205e38f6
--- /dev/null
+++ b/rc/extra/go-tools.kak
@@ -0,0 +1,182 @@
+# 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 ${kak_session}
+        ) > /dev/null 2>&1 < /dev/null &
+    }
+}
+
+def go-enable-autocomplete -docstring "Add gocode completion candidates to the completer" %{
+    set window completers "option=gocode_completions:%opt{completers}"
+    hook window -group go-autocomplete InsertIdle .* %{ try %{
+        exec -draft <a-h><a-k>[\w\.].\z<ret>
+        go-complete
+    } }
+    alias window complete go-complete
+}
+
+def go-disable-autocomplete -docstring "Disable gocode completion" %{
+    set window completers %sh{ printf %s\\n "'${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 [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 [ "$1" = "1" ]; then
+            fmt_cmd="goimports -srcdir '${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 ${dir}
+    }
+    edit!
+}
+
+def go-enable-format-onsave -docstring "Enable formatting on save for go files" %{
+    hook buffer -group go-format-onsave BufWritePre .+\.go %{ go-format }
+}
+
+def go-enable-format-imports-onsave -docstring "Enable formatting (with goimports) on save for go files" %{
+    hook buffer -group go-format-onsave BufWritePre .+\.go %{ go-format 1 }
+}
+
+def go-disable-format-onsave -docstring "Disable formatting on save for go files" %{
+    rmhooks buffer go-format-onsave
+}
+
+# Documentation
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+decl -hidden str go_doc_tmp_dir
+
+# FIXME text escaping
+def -hidden -params 1..2 _gogetdoc-cmd %{
+   %sh{
+        dir=$(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} 
+} }

From 28e37b608daa3ce58776fb44f943638ef0bd4013 Mon Sep 17 00:00:00 2001
From: Martin Chaine <martin@casimir.me>
Date: Sat, 5 Nov 2016 18:40:37 +0100
Subject: [PATCH 2/3] remove trailing whitespaces

---
 rc/extra/go-tools.kak | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/rc/extra/go-tools.kak b/rc/extra/go-tools.kak
index 205e38f6..5534d68b 100644
--- a/rc/extra/go-tools.kak
+++ b/rc/extra/go-tools.kak
@@ -1,6 +1,6 @@
 # Provides integration of the following tools:
 # - gocode for code completion (github.com/nsf/gocode)
-# - goimports for code formatting on save 
+# - 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
@@ -149,7 +149,7 @@ def -hidden -params 1..2 _gogetdoc-cmd %{
                         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}' }                   
+                            try %{ focus '${kak_opt_jumpclient}' }
                         }" | kak -p ${kak_session}
                     fi
                     ;;
@@ -178,5 +178,5 @@ def go-jump -docstring "Jump to the symbol definition" %{
 
 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} 
+    printf "echo https://play.golang.org/p/%s" ${snippet_id}
 } }

From 352c56bfb59b5bbeb0c84098b05a0729b76b1138 Mon Sep 17 00:00:00 2001
From: Martin Chaine <martin@casimir.me>
Date: Sun, 6 Nov 2016 12:31:27 +0100
Subject: [PATCH 3/3] let the user set the format hook

---
 rc/extra/go-tools.kak | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/rc/extra/go-tools.kak b/rc/extra/go-tools.kak
index 5534d68b..b5efb355 100644
--- a/rc/extra/go-tools.kak
+++ b/rc/extra/go-tools.kak
@@ -54,7 +54,7 @@ def go-disable-autocomplete -docstring "Disable gocode completion" %{
 decl -hidden str go_format_tmp_dir
 
 def -params ..1 go-format \
-    -docstring "go-format [goimports]: custom formatter for go files" %{
+    -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 ${dir}"
@@ -62,7 +62,7 @@ def -params ..1 go-format \
     }
     %sh{
         dir=${kak_opt_go_format_tmp_dir}
-        if [ "$1" = "1" ]; then
+        if [ "$1" = "-use-goimports" ]; then
             fmt_cmd="goimports -srcdir '${kak_buffile}'"
         else
             fmt_cmd="gofmt -s"
@@ -79,18 +79,6 @@ def -params ..1 go-format \
     edit!
 }
 
-def go-enable-format-onsave -docstring "Enable formatting on save for go files" %{
-    hook buffer -group go-format-onsave BufWritePre .+\.go %{ go-format }
-}
-
-def go-enable-format-imports-onsave -docstring "Enable formatting (with goimports) on save for go files" %{
-    hook buffer -group go-format-onsave BufWritePre .+\.go %{ go-format 1 }
-}
-
-def go-disable-format-onsave -docstring "Disable formatting on save for go files" %{
-    rmhooks buffer go-format-onsave
-}
-
 # Documentation
 # ‾‾‾‾‾‾‾‾‾‾‾‾‾