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lix-releng-staging/tests/substitutes.sh

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* Re-enable support for substitutes in the normaliser. * A better substitute mechanism. Instead of generating a store expression for each store path for which we have a substitute, we can have a single store expression that builds a generic program that is invoked to build the desired store path, which is passed as an argument. This means that operations like `nix-pull' only produce O(1) files instead of O(N) files in the store when registering N substitutes. (It consumes O(N) database storage, of course, but that's not a performance problem). * Added a test for the substitute mechanism. * `nix-store --substitute' reads the substitutes from standard input, instead of from the command line. This prevents us from running into the kernel's limit on command line length.
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# Instantiate.
storeExpr=$($TOP/src/nix-instantiate/nix-instantiate substitutes.nix)
echo "store expr is $storeExpr"
# Find the output path.
outPath=$($TOP/src/nix-store/nix-store -qvvvvv "$storeExpr")
echo "output path is $outPath"
* I love test sets.
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# Build the substitute program.
subProgram=$($TOP/src/nix-store/nix-store -qnf \
$($TOP/src/nix-instantiate/nix-instantiate substituter.nix))/substituter
echo "substitute program is $subProgram"
* Re-enable support for substitutes in the normaliser. * A better substitute mechanism. Instead of generating a store expression for each store path for which we have a substitute, we can have a single store expression that builds a generic program that is invoked to build the desired store path, which is passed as an argument. This means that operations like `nix-pull' only produce O(1) files instead of O(N) files in the store when registering N substitutes. (It consumes O(N) database storage, of course, but that's not a performance problem). * Added a test for the substitute mechanism. * `nix-store --substitute' reads the substitutes from standard input, instead of from the command line. This prevents us from running into the kernel's limit on command line length.
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* A test for multiple and/or failing substitutes.
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regSub() {
* I love test sets.
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(echo $1 && echo $2 && echo 3 && echo $outPath && echo Hallo && echo Wereld) | $TOP/src/nix-store/nix-store --substitute
* A test for multiple and/or failing substitutes.
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}
* Re-enable support for substitutes in the normaliser. * A better substitute mechanism. Instead of generating a store expression for each store path for which we have a substitute, we can have a single store expression that builds a generic program that is invoked to build the desired store path, which is passed as an argument. This means that operations like `nix-pull' only produce O(1) files instead of O(N) files in the store when registering N substitutes. (It consumes O(N) database storage, of course, but that's not a performance problem). * Added a test for the substitute mechanism. * `nix-store --substitute' reads the substitutes from standard input, instead of from the command line. This prevents us from running into the kernel's limit on command line length.
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# Register a fake successor, and a substitute for it.
suc=$NIX_STORE_DIR/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-s.store
* I love test sets.
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regSub $suc $subProgram
* Re-enable support for substitutes in the normaliser. * A better substitute mechanism. Instead of generating a store expression for each store path for which we have a substitute, we can have a single store expression that builds a generic program that is invoked to build the desired store path, which is passed as an argument. This means that operations like `nix-pull' only produce O(1) files instead of O(N) files in the store when registering N substitutes. (It consumes O(N) database storage, of course, but that's not a performance problem). * Added a test for the substitute mechanism. * `nix-store --substitute' reads the substitutes from standard input, instead of from the command line. This prevents us from running into the kernel's limit on command line length.
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$TOP/src/nix-store/nix-store --successor $storeExpr $suc
# Register a substitute for the output path.
* I love test sets.
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regSub $outPath $subProgram
* Re-enable support for substitutes in the normaliser. * A better substitute mechanism. Instead of generating a store expression for each store path for which we have a substitute, we can have a single store expression that builds a generic program that is invoked to build the desired store path, which is passed as an argument. This means that operations like `nix-pull' only produce O(1) files instead of O(N) files in the store when registering N substitutes. (It consumes O(N) database storage, of course, but that's not a performance problem). * Added a test for the substitute mechanism. * `nix-store --substitute' reads the substitutes from standard input, instead of from the command line. This prevents us from running into the kernel's limit on command line length.
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$TOP/src/nix-store/nix-store -rvvvvv "$storeExpr"
text=$(cat "$outPath"/hello)
if test "$text" != "Hallo Wereld"; then exit 1; fi
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