feat: de-duplicate cpprc

src/main.ts

@@ -39,7 +39,7 @@ import { setupVcpkg } from "./vcpkg/vcpkg"
 import { join } from "patha"
 import { setupVCVarsall } from "./vcvarsall/vcvarsall"
 import { setupKcov } from "./kcov/kcov"
-import { addEnv } from "./utils/env/addEnv"
+import { addEnv, finalizeCpprc } from "./utils/env/addEnv"
 import { setupSevenZip } from "./sevenzip/sevenzip"
 import { setupGraphviz } from "./graphviz/graphviz"
 import { setupNala } from "./nala/nala"
@@ -270,6 +270,8 @@ export async function main(args: string[]): Promise<number> {
     info(`took ${timeFormatter.format(time1, time2) || "0 seconds"}`)
   }
 
+  finalizeCpprc()
+
   if (successMessages.length === 0 && errorMessages.length === 0) {
     warning("setup_cpp was called without any arguments. Nothing to do.")
     return 0

src/utils/env/addEnv.ts

@@ -1,7 +1,7 @@
 import { exportVariable, addPath as ghAddPath, info, setFailed } from "@actions/core"
 import ciDetect from "@npmcli/ci-detect"
 import { untildifyUser } from "untildify-user"
-import { appendFileSync, existsSync, readFileSync } from "fs"
+import { appendFileSync, existsSync, readFileSync, writeFileSync } from "fs"
 import { error, warning } from "ci-log"
 import { execPowershell } from "exec-powershell"
 import { delimiter } from "path"
@@ -119,7 +119,7 @@ export function setupCppInProfile() {
   }
 
   // a variable that prevents source_cpprc from being called from .bashrc and .profile
-  const source_cpprc_str = "export SOURCE_CPPRC=0"
+  const source_cpprc_str = "# Automatically Generated by setup-cpp\nexport SOURCE_CPPRC=0"
 
   if (existsSync(cpprc_path)) {
     const cpprc_content = readFileSync(cpprc_path, "utf8")
@@ -132,8 +132,6 @@ export function setupCppInProfile() {
   appendFileSync(cpprc_path, `\n${source_cpprc_str}\n`)
   info(`Added ${source_cpprc_str} to ${cpprc_path}`)
 
-  giveUserAccess(cpprc_path)
-
   // source cpprc in bashrc/profile
 
   const source_cpprc_string = `\n# source .cpprc if SOURCE_CPPRC is not set to 0\nif [[ "$SOURCE_CPPRC" != 0 && -f "${cpprc_path}" ]]; then source "${cpprc_path}"; fi\n`
@@ -154,3 +152,19 @@ export function setupCppInProfile() {
 
   setupCppInProfile_called = true
 }
+
+export function finalizeCpprc() {
+  if (existsSync(cpprc_path)) {
+    const entries = readFileSync(cpprc_path, "utf-8").split("\n")
+
+    const unique_entries = [...new Set(entries.reverse())].reverse() // remove duplicates, keeping the latest entry
+
+    writeFileSync(cpprc_path, unique_entries.join("\n"))
+
+    try {
+      giveUserAccess(cpprc_path)
+    } catch {
+      // ignore
+    }
+  }
+}