+ $tmpZip = Join-Path $RsyncDir "download-$RsyncAsset"\r
+ Invoke-WebRequest -Uri $RsyncUrl -OutFile $tmpZip -UseBasicParsing\r
+ Write-Host " Downloaded $RsyncAsset ($([math]::Round((Get-Item $tmpZip).Length / 1MB, 2)) MB)"\r
+\r
+ # Verify against the .sha256 published beside it. Same origin, so this is an\r
+ # integrity check on the transfer rather than a defence against a hostile\r
+ # release - but a truncated or proxy-mangled download is the failure that\r
+ # actually happens, and it fails here instead of mid-transfer later.\r
+ #\r
+ # -OutFile, not .Content: GitHub serves the .sha256 as\r
+ # application/octet-stream, and Invoke-WebRequest hands back a byte[] rather\r
+ # than a string for any non-text content type, so .Content would compare the\r
+ # first BYTE against the hash and fail on every correct download.\r
+ $tmpSha = "$tmpZip.sha256"\r
+ Invoke-WebRequest -Uri "$RsyncUrl.sha256" -OutFile $tmpSha -UseBasicParsing\r
+ $want = (((Get-Content $tmpSha -Raw) -split '\s+')[0]).Trim().ToLower()\r
+ Remove-Item $tmpSha -Force -ErrorAction SilentlyContinue\r
+ $got = (Get-FileHash $tmpZip -Algorithm SHA256).Hash.ToLower()\r
+ if ($want -and $want -ne $got) {\r
+ Remove-Item $tmpZip -Force\r
+ throw "SHA-256 mismatch for ${RsyncAsset}: expected $want, got $got"\r
+ }\r
+ Write-Host " SHA-256 verified: $got"\r
+\r
+ # Unpack to a scratch directory and move out the files we asked for, rather\r
+ # than expanding straight over the install directory: the zip is the unit\r
+ # that was checksummed, and this way a future release adding something to it\r
+ # cannot quietly drop that something onto the machine PATH.\r
+ $unpack = Join-Path $RsyncDir '.unpack'\r
+ if (Test-Path $unpack) { Remove-Item -Recurse -Force $unpack }\r
+ Expand-Archive -Path $tmpZip -DestinationPath $unpack -Force\r
+ Remove-Item $tmpZip -Force\r
+ foreach ($f in 'rsync.exe', 'ssh.exe', 'COPYING.txt', 'NOTICE-ssh.txt') {\r
+ $src = Join-Path $unpack $f\r
+ if (-not (Test-Path $src)) { continue }\r
+ if ($f -eq 'ssh.exe' -and -not $WantSsh) { continue }\r
+ Move-Item -Path $src -Destination (Join-Path $RsyncDir $f) -Force\r
+ }\r
+ Remove-Item -Recurse -Force $unpack\r
+\r
+ # Prove the unpacked ssh.exe actually starts, and DELETE it if it does not.\r
+ #\r
+ # This matters more than it looks. rsync.exe prefers an ssh.exe sitting in its\r
+ # own directory, so a present-but-unstartable one does not degrade to the\r
+ # in-box client - it breaks rsync outright, and the error you get is a remote\r
+ # shell that died rather than anything naming ssh.exe. The two ways to land\r
+ # there are a missing/old System32 libcrypto.dll (x64 boxes) and an ARM64 box\r
+ # whose ARM64 libcrypto cannot be loaded by this x64 binary. Removing it is\r
+ # the repair in both cases: rsync then falls back to the ssh on the PATH,\r
+ # which on ARM64 is the native in-box client.\r
+ #\r
+ # EAP back to Continue for the call: ssh -V writes its version to STDERR, and\r
+ # under $ErrorActionPreference = 'Stop' a native command's stderr becomes a\r
+ # terminating error, so a WORKING client would look like a broken one.\r
+ # $global:LASTEXITCODE is cleared first because an exe that cannot start at\r
+ # all throws without setting one, and the stale 0 from the previous native\r
+ # command would otherwise read as success.\r
+ $SshExe = Join-Path $RsyncDir 'ssh.exe'\r
+ if ($WantSsh -and (Test-Path $SshExe)) {\r
+ $prevEap = $ErrorActionPreference\r
+ $ErrorActionPreference = 'Continue'\r
+ $global:LASTEXITCODE = $null\r
+ $sshVer = $null\r
+ try { $sshVer = (& $SshExe -V 2>&1 | Select-Object -First 1) } catch { }\r
+ finally { $ErrorActionPreference = $prevEap }\r
+ if ($LASTEXITCODE -eq 0) {\r
+ Write-Host " ssh.exe runs: $sshVer"\r
+ } else {\r
+ $why = if ($null -eq $LASTEXITCODE) { 'it would not start' } else { "exit $LASTEXITCODE" }\r
+ Write-Warning "The release's ssh.exe does not run here ($why)$(if ($sshVer) { ": $sshVer" }). Removing it so rsync.exe falls back to the ssh on the PATH instead of failing on it."\r
+ Remove-Item $SshExe -Force -ErrorAction SilentlyContinue\r
+ $WantSsh = $false\r
+ }\r
+ }\r
+ Write-Host " Installed $RsyncExe$(if ($WantSsh) { ' and the ssh.exe it runs' })"\r
vilimpoc.org / repos / dotfiles / blobdiff