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ExternalProject: Fix misuse of IS_NEWER_THAN in timestamp checks

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When using a file system which only has second resolution timestamps,
there is a reasonably high likelihood of timestamps being the same.
The IS_NEWER_THAN test returns true when timestamps are the same,
so don't redo downloads when they match exactly.
This commit is contained in:
Craig Scott
2021-02-21 17:40:21 +11:00
committed by Brad King
parent eefcf2e0a6
commit 404cddb7bb
2 changed files with 4 additions and 2 deletions
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3
Modules/ExternalProject/gitclone.cmake.in
View File

@@ -7,7 +7,8 @@ set(quiet "@quiet@")
set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
include(${script_dir}/captured_process_setup.cmake)
if(NOT "@gitclone_infofile@" IS_NEWER_THAN "@gitclone_stampfile@")
if(EXISTS "@gitclone_stampfile@" AND EXISTS "@gitclone_infofile@" AND
"@gitclone_stampfile@" IS_NEWER_THAN "@gitclone_infofile@")
if(NOT quiet)
message(STATUS
"Avoiding repeated git clone, stamp file is up to date: "

3
Modules/ExternalProject/hgclone.cmake.in
View File

@@ -7,7 +7,8 @@ set(quiet "@quiet@")
set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
include(${script_dir}/captured_process_setup.cmake)
if(NOT "@hgclone_infofile@" IS_NEWER_THAN "@hgclone_stampfile@")
if(EXISTS "@hgclone_stampfile@" AND EXISTS "@hgclone_infofile@" AND
"@hgclone_stampfile@" IS_NEWER_THAN "@hgclone_infofile@")
if(NOT quiet)
message(STATUS
"Avoiding repeated hg clone, stamp file is up to date: "