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* Acquire the locks on the output paths before trying to run the build

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hook.  This fixes a problem with log files being partially or
  completely filled with 0's because another nix-store process
  truncates the log file.  It should also be more efficient.
This commit is contained in:
Eelco Dolstra 2009-03-18 14:48:42 +00:00
parent 1dcf208f56
commit c183ee5c79
4 changed files with 78 additions and 150 deletions
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6
tests/gc-concurrent.sh
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@ -1,6 +1,6 @@
source common.sh
$NIX_BIN_DIR/nix-collect-garbage -vvvvv
$NIX_BIN_DIR/nix-collect-garbage
drvPath1=$($nixinstantiate gc-concurrent.nix -A test1)
outPath1=$($nixstore -q $drvPath1)
@ -28,7 +28,7 @@ pid2=$!
# Run the garbage collector while the build is running.
sleep 4
$NIX_BIN_DIR/nix-collect-garbage -vvvvv
$NIX_BIN_DIR/nix-collect-garbage
# Wait for build #1/#2 to finish.
echo waiting for pid $pid1 to finish...
@ -53,6 +53,6 @@ rm -f "$NIX_STATE_DIR"/gcroots/foo*
! test -e $outPath3.lock
# If we run the collector now, it should delete outPath1/2.
$NIX_BIN_DIR/nix-collect-garbage -vvvvv
$NIX_BIN_DIR/nix-collect-garbage
! test -e $outPath1
! test -e $outPath2