add command line flags

.drone.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+# disable CGO for cross-compiling
+export CGO_ENABLED=0
+
+commit=$(git rev-parse HEAD)
+buildtime=$(TZ=Australia/Sydney date +%Y-%m-%dT%T%z)
+git_version=$(git describe --tags --always --long --dirty)
+package_name=generate-chart
+
+#platforms=("linux/amd64" "darwin/amd64")
+platforms=("linux/amd64", "windows/amd64")
+
+echo Building $package_name with git version: $git_version
+for platform in "${platforms[@]}"
+do
+   platform_split=(${platform//\// })
+   GOOS=${platform_split[0]}
+   GOARCH=${platform_split[1]}
+   output_name=$package_name'-'$GOOS'-'$GOARCH
+   if [ $GOOS = "windows" ]; then
+       output_name+='.exe'
+   fi
+
+   starttime=$(TZ=Australia/Sydney date +%Y-%m-%dT%T%z)
+   echo "build commences at $starttime"
+   env GOOS=$GOOS GOARCH=$GOARCH go build -trimpath -ldflags="-X main.sha1ver=$commit -X main.buildTime=$buildtime" -o $output_name $package
+   if [ $? -ne 0 ]; then
+       echo 'An error has occurred! Aborting the script execution...'
+       exit 1
+   fi
+   gzip $output_name
+   echo "build complete at $buildtime : $output_name"
+   sha256sum ${output_name}.gz > ${output_name}_checksum.txt
+done
+
+ls -lah

.drone.yml

@@ -0,0 +1,32 @@
+kind: pipeline
+type: docker
+name: default
+
+# Docs at https://docs.drone.io/pipeline/exec/overview/
+# Also see https://github.com/harness/drone-cli/blob/master/.drone.yml
+
+steps:
+
+- name: build
+  image: golang
+  environment:
+    CGO_ENABLED: 0
+  commands:
+  - sh ./.drone.sh
+
+
+- name: dell-sftp-deploy
+  image: hypervtechnics/drone-sftp
+  settings:
+    host: deft.dell.com
+    username:
+      from_secret: DELLFTP_USER
+    password:
+      from_secret: DELLFTP_PASS
+    port: 22
+    source: ./
+    filter: generate-chart*
+    clean: false
+    target: /
+    overwrite: true
+    verbose: true

.gitignore

@@ -0,0 +1,2 @@
+*.json
+*.xlsx

README.md

@@ -0,0 +1,64 @@
+# Excel Chart Generator
+
+Using the excellent open source [excelize](https://github.com/qax-os/excelize) library, convert json data tracking numbers over time into an excel workbook of graphs.
+
+## Input data
+
+Here is some sample input data. Note that some of these key names are hard coded in the source code in order to reduce complexity.
+
+```json
+{
+    "Tracking": {
+        "AVG data 1": {
+            "Low": {
+                "DC1": {
+                    "September-2024": 17948.94,
+                    "August-2024": 17947.40,
+                    "July-2024": 17470.34,
+                    "June-2024": 17648.02,
+                    "May-2024": 17314.25
+                },
+                "DC2": {
+                    "September-2024": 21226.84,
+                    "August-2024": 20956.31,
+                    "July-2024": 20021.72,
+                    "June-2024": 19713.80,
+                    "May-2024": 19945.32
+                }
+            },
+            "Ultra": {
+                "DC1": {
+                    "September-2024": 4544,
+                    "August-2024": 4544,
+                    "July-2024": 4685.90,
+                    "June-2024": 4741.55,
+                    "May-2024": 4830.26
+                },
+                "DC2": {
+                    "September-2024": 5369.58,
+                    "August-2024": 5372,
+                    "July-2024": 5357.38,
+                    "June-2024": 5344.6,
+                    "May-2024": 5306.26
+                }
+            }
+        },
+        "count 1": {
+            "DC1": {
+                "September-2024": 6801.80,
+                "August-2024": 6804.71,
+                "July-2024": 6664.03,
+                "June-2024": 6673.87,
+                "May-2024": 6656.42
+            },
+            "DC2": {
+                "September-2024": 6751.17,
+                "August-2024": 6765.42,
+                "July-2024": 6597.65,
+                "June-2024": 6510.47,
+                "May-2024": 6487.19
+            }
+        }
+    }
+}
+```

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"encoding/json"
+	"flag"
 	"fmt"
 	"io"
 	"log"
@@ -239,6 +240,10 @@ func AvgChart(f *excelize.File, worksheetName string, location string, avgCpuCol
 func main() {
 	var err error
 
+	inputFile := flag.String("input", "input.json", "The filename from which to load historical data")
+	outputFile := flag.String("output", "book1.xlsx", "The filename to use when writing excel workbook")
+	flag.Parse()
+
 	// Create the workbook
 	f := excelize.NewFile()
 	defer func() {
@@ -252,7 +257,7 @@ func main() {
 	}
 
 	// Load the JSON data from file
-	file, err := os.Open("input.json")
+	file, err := os.Open(*inputFile)
 	if err != nil {
 		log.Fatalf("Failed to open input.json: %v", err)
 	}
@@ -271,7 +276,7 @@ func main() {
 	GenerateCharts(f, data.Tracking.VmCount, "VM Count", "N60")
 
 	// Save workbook
-	if err := f.SaveAs("Book1.xlsx"); err != nil {
+	if err := f.SaveAs(*outputFile); err != nil {
 		fmt.Println(err)
 	}
 }