Run core/fmt.sh from VSCode on save (#323)

.vscode/settings.json

@@ -25,7 +25,7 @@
   "[makefile]": {
     "editor.renderWhitespace": "all"
   },
-  "go.formatTool": "gofumpt",
+  "go.formatTool": "custom",
   "go.testFlags": [
     "-v",
     "-tags",
@@ -36,5 +36,8 @@
   "tailwindCSS.experimental.classRegex": [
     ["cva\\(([^)]*)\\)", "[\"'`]([^\"'`]*).*?[\"'`]"],
     ["cn\\(([^)]*)\\)", "(?:'|\"|`)([^']*)(?:'|\"|`)"]
-  ]
+  ],
+  "go.alternateTools": {
+    "customFormatter": "${workspaceFolder}/core/fmt.sh",
+  }
 }

core/fmt.sh

@@ -2,14 +2,29 @@
 set -euo pipefail
 cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")"
 
-# In addition to running gofumpt this script also limits line length to 120 characters
-# There is no good way to run golines for single file from .vscode
-# due to this bug: https://github.com/golang/vscode-go/issues/2582
+if ! command -v "gofumpt" >/dev/null 2>&1; then
+    go install mvdan.cc/gofumpt@latest >/dev/null 2>&1
+fi
+if ! command -v "golines" >/dev/null 2>&1; then
+    go install github.com/segmentio/golines@latest >/dev/null 2>&1
+fi
+
+# Read all lines from stdin into the variable 'input'
+INPUT=$(cat)
+
+FMT_CMD="golines --base-formatter=gofumpt --max-len=120"
+
+# If arguments are empty and stdin is not empty, run formatter on stdin to stdout
+if [[ -z "$*" && -n "${INPUT}" ]]
+then
+    echo "${INPUT}" | ${FMT_CMD}
+    exit 0
+fi
 
 # Set ARGS to -w if not set, otherwie to cmd line args
 ARGS=${@:-"-w"}
 
-OUTPUT=$(go list -f '{{.Dir}}' ./... | grep -v /contracts | grep -v /protocol | grep -v /mocks | xargs golines --base-formatter=gofumpt --max-len=120 $ARGS)
+OUTPUT=$(go list -f '{{.Dir}}' ./... | grep -v /contracts | grep -v /protocol | grep -v /mocks | xargs ${FMT_CMD} $ARGS)
 if [ -n "$OUTPUT" ]
 then
     echo "$OUTPUT"