fix(install): fix checksum matching and stdout pollution

Author: snowdream

install.ps1

@@ -181,7 +181,7 @@ function Download-And-Verify {
     try {
         Invoke-DownloadWithRetry -Url $ChecksumUrl -OutFile $ChecksumPath
         $checksumContent = Get-Content $ChecksumPath -Raw
-        $entry = ($checksumContent -split "`n") | Where-Object { $_ -match [regex]::Escape($ArchiveName) }
+        $entry = ($checksumContent -split "`r?`n") | Where-Object { $_ -match ('\s' + [regex]::Escape($ArchiveName) + '$') }
         if ($entry) {
             $expected = ($entry -split '\s+')[0].Trim()
             $actual   = (Get-FileHash -Algorithm SHA256 $ArchivePath).Hash.ToLower()

install.sh

@@ -29,8 +29,8 @@ CURL_MAX_TIME=120
 # ---------------------------------------------------------------------------
 # Helpers
 # ---------------------------------------------------------------------------
-info() { printf '\033[0;32m[INFO]\033[0m  %s\n' "$*"; }
-warn() { printf '\033[0;33m[WARN]\033[0m  %s\n' "$*"; }
+info() { printf '\033[0;32m[INFO]\033[0m  %s\n' "$*" >&2; }
+warn() { printf '\033[0;33m[WARN]\033[0m  %s\n' "$*" >&2; }
 error() { printf '\033[0;31m[ERROR]\033[0m %s\n' "$*" >&2; }
 die() {
   error "$*"
@@ -235,7 +235,7 @@ download_and_verify() {
   if curl_with_retry "$CHECKSUM_URL" "$CHECKSUM_PATH" 2>/dev/null; then
     info "Verifying checksum..."
     # Extract the expected checksum for our archive
-    EXPECTED="$(grep "${ARCHIVE_NAME}" "$CHECKSUM_PATH" | awk '{print $1}')"
+    EXPECTED="$(grep -E "[[:space:]]${ARCHIVE_NAME}[[:space:]]*\$" "$CHECKSUM_PATH" | awk '{print $1}')"
     if [ -z "$EXPECTED" ]; then
       warn "Checksum entry not found for ${ARCHIVE_NAME}, skipping verification."
     else