47 lines
1 KiB
Perl
47 lines
1 KiB
Perl
Modify an input file during the build so that dune interrupts the
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build
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$ . ./helpers.sh
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$ echo "(lang dune 2.0)" > dune-project
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$ cat > x <<EOF
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> original-contents
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> EOF
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$ cat >dune <<'EOF'
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> (rule
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> (target y)
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> (deps x)
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> (action (bash "\> if [[ "$(cat x)" == unstable ]]; then
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> "\> touch ../../go-ahead
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> "\> sleep 1000
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> "\> exit 1
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> "\> else
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> "\> cat x > y
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> "\> fi
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> )))
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> EOF
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The rule above makes the test hang if it sees an "unstable" state of
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the file. This makes it easy to make sure that the dune won't finish
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before we're able to cancel the build.
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$ start_dune
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$ build y
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Success
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$ cat _build/default/y
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original-contents
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$ echo unstable > x
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$ (dune_cmd wait-for-file-to-appear go-ahead; echo new-contents > x) & build y
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Success
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$ cat _build/default/y
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new-contents
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$ stop_dune
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Success, waiting for filesystem changes...
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Success, waiting for filesystem changes...
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