47 lines
1.3 KiB
Text
47 lines
1.3 KiB
Text
# Copyright 2023 Signal Messenger, LLC
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# SPDX-License-Identifier: AGPL-3.0-only
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!include WinVer.nsh
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!include SignalStrings.nsh
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ManifestDPIAware true
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!macro preInit
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Var /Global OLD_SIGNAL_VERSION
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# Check minimum OS version
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${IfNot} ${AtLeastWin10}
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MessageBox MB_OK|MB_ICONEXCLAMATION "$(signalMinWinVersionErr)"
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DetailPrint `Windows version check failed`
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Abort
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${EndIf}
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# If previously installed
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ReadRegStr $OLD_SIGNAL_VERSION SHELL_CONTEXT "${UNINSTALL_REGISTRY_KEY}" \
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"DisplayVersion"
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StrCmp $OLD_SIGNAL_VERSION "" end_semver_check
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# Check that we are not overwriting newer version of the app.
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${StdUtils.ScanStr3} $R0 $R1 $R2 "%d.%d.%d" $OLD_SIGNAL_VERSION 0 0 0
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${StdUtils.ScanStr3} $R3 $R4 $R5 "%d.%d.%d" ${VERSION} 0 0 0
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# Compare major number
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IntCmp $R0 $R3 same_major end_semver_check downgrade
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# Compare minor number
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same_major:
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IntCmp $R1 $R4 same_minor end_semver_check downgrade
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# Compare patch number
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same_minor:
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IntCmp $R2 $R5 end_semver_check end_semver_check downgrade
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# Detected downgrade - show message box
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downgrade:
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MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION \
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"$(signalMinAppVersionErr)" /SD IDCANCEL IDOK end_semver_check
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DetailPrint `SemVer check failed`
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Abort
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end_semver_check:
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!macroend
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