tests: use sha256line.py instead of /dev/random in test-censor.t (issue6858)

Sometimes the systems that run our test suite don't have enough entropy and
they cannot produce target file of the expected size using /dev/random, which
results in test failures. Switching to /dev/urandom would give us way more
available data at the cost of it being less "random", but we don't really need
to use entropy for this task at all, since we only care if the file size after
compression is big enough to not be stored inline in the revlog. So let's use
something that we already have used to generate this kind of data in other
tests.

tests/test-censor.t

@@ -1,621 +1,621 b''
 #require no-reposimplestore
 #testcases revlogv1 revlogv2
 
 #if revlogv2
 
   $ cat >> $HGRCPATH <<EOF
   > [experimental]
   > revlogv2=enable-unstable-format-and-corrupt-my-data
   > EOF
 
 #endif
 
   $ cp $HGRCPATH $HGRCPATH.orig
 
 Create repo with unimpeachable content
 
   $ hg init r
   $ cd r
   $ echo 'Initially untainted file' > target
   $ echo 'Normal file here' > bystander
   $ hg add target bystander
   $ hg ci -m init
 
 Clone repo so we can test pull later
 
   $ cd ..
   $ hg clone r rpull
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd r
 
 Introduce content which will ultimately require censorship. Name the first
 censored node C1, second C2, and so on
 
   $ echo 'Tainted file' > target
   $ echo 'Passwords: hunter2' >> target
   $ hg ci -m taint target
   $ C1=`hg id --debug -i`
 
   $ echo 'hunter3' >> target
   $ echo 'Normal file v2' > bystander
   $ hg ci -m moretaint target bystander
   $ C2=`hg id --debug -i`
 
 Add a new sanitized versions to correct our mistake. Name the first head H1,
 the second head H2, and so on
 
   $ echo 'Tainted file is now sanitized' > target
   $ hg ci -m sanitized target
   $ H1=`hg id --debug -i`
 
   $ hg update -r $C2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo 'Tainted file now super sanitized' > target
   $ hg ci -m 'super sanitized' target
   created new head
   $ H2=`hg id --debug -i`
 
 Verify target contents before censorship at each revision
 
   $ hg cat -r $H1 target | head -n 10
   Tainted file is now sanitized
   $ hg cat -r $H2 target | head -n 10
   Tainted file now super sanitized
   $ hg cat -r $C2 target | head -n 10
   Tainted file
   Passwords: hunter2
   hunter3
   $ hg cat -r $C1 target | head -n 10
   Tainted file
   Passwords: hunter2
   $ hg cat -r 0 target | head -n 10
   Initially untainted file
 
 Censor revision with 2 offenses
 
 (this also tests file pattern matching: path relative to cwd case)
 
   $ mkdir -p foo/bar/baz
   $ hg --config extensions.censor= --cwd foo/bar/baz censor -r $C2 -t "remove password" ../../../target
   $ hg cat -r $H1 target | head -n 10
   Tainted file is now sanitized
   $ hg cat -r $H2 target | head -n 10
   Tainted file now super sanitized
   $ hg cat -r $C2 target | head -n 10
   abort: censored node: 1e0247a9a4b7
   (set censor.policy to ignore errors)
   $ hg cat -r $C1 target | head -n 10
   Tainted file
   Passwords: hunter2
   $ hg cat -r 0 target | head -n 10
   Initially untainted file
 
 Censor revision with 1 offense
 
 (this also tests file pattern matching: with 'path:' scheme)
 
   $ hg --config extensions.censor= --cwd foo/bar/baz censor -r $C1 path:target
   $ hg cat -r $H1 target | head -n 10
   Tainted file is now sanitized
   $ hg cat -r $H2 target | head -n 10
   Tainted file now super sanitized
   $ hg cat -r $C2 target | head -n 10
   abort: censored node: 1e0247a9a4b7
   (set censor.policy to ignore errors)
   $ hg cat -r $C1 target | head -n 10
   abort: censored node: 613bc869fceb
   (set censor.policy to ignore errors)
   $ hg cat -r 0 target | head -n 10
   Initially untainted file
 
 Can only checkout target at uncensored revisions, -X is workaround for --all
 
   $ hg revert -r $C2 target | head -n 10
   abort: censored node: 1e0247a9a4b7
   (set censor.policy to ignore errors)
   $ hg revert -r $C1 target | head -n 10
   abort: censored node: 613bc869fceb
   (set censor.policy to ignore errors)
   $ hg revert -r $C1 --all
   reverting bystander
   reverting target
   abort: censored node: 613bc869fceb
   (set censor.policy to ignore errors)
   [255]
   $ hg revert -r $C1 --all -X target
   $ cat target | head -n 10
   Tainted file now super sanitized
   $ hg revert -r 0 --all
   reverting target
   $ cat target | head -n 10
   Initially untainted file
   $ hg revert -r $H2 --all
   reverting bystander
   reverting target
   $ cat target | head -n 10
   Tainted file now super sanitized
 
 Uncensored file can be viewed at any revision
 
   $ hg cat -r $H1 bystander | head -n 10
   Normal file v2
   $ hg cat -r $C2 bystander | head -n 10
   Normal file v2
   $ hg cat -r $C1 bystander | head -n 10
   Normal file here
   $ hg cat -r 0 bystander | head -n 10
   Normal file here
 
 Can update to children of censored revision
 
   $ hg update -r $H1
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat target | head -n 10
   Tainted file is now sanitized
   $ hg update -r $H2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat target | head -n 10
   Tainted file now super sanitized
 
 Set censor policy to abort in trusted $HGRC so hg verify fails
 
   $ cp $HGRCPATH.orig $HGRCPATH
   $ cat >> $HGRCPATH <<EOF
   > [censor]
   > policy = abort
   > EOF
 
 Repo fails verification due to censorship
 
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
    target@1: censored file data
    target@2: censored file data
   not checking dirstate because of previous errors
   checked 5 changesets with 7 changes to 2 files
   2 integrity errors encountered!
   (first damaged changeset appears to be 1)
   [1]
 
 Cannot update to revision with censored data
 
   $ hg update -r $C2
   abort: censored node: 1e0247a9a4b7
   (set censor.policy to ignore errors)
   [255]
   $ hg update -r $C1
   abort: censored node: 613bc869fceb
   (set censor.policy to ignore errors)
   [255]
   $ hg update -r 0
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg update -r $H2
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Set censor policy to ignore in trusted $HGRC so hg verify passes
 
   $ cp $HGRCPATH.orig $HGRCPATH
   $ cat >> $HGRCPATH <<EOF
   > [censor]
   > policy = ignore
   > EOF
 
 Repo passes verification with warnings with explicit config
 
   $ hg verify -q
 
 May update to revision with censored data with explicit config
 
   $ hg update -r $C2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat target | head -n 10
   $ hg update -r $C1
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat target | head -n 10
   $ hg update -r 0
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat target | head -n 10
   Initially untainted file
   $ hg update -r $H2
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat target | head -n 10
   Tainted file now super sanitized
 
 Can merge in revision with censored data. Test requires one branch of history
 with the file censored, but we can't censor at a head, so advance H1.
 
   $ hg update -r $H1
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ C3=$H1
   $ echo 'advanced head H1' > target
   $ hg ci -m 'advance head H1' target
   $ H1=`hg id --debug -i`
   $ hg --config extensions.censor= censor -r $C3 target
   $ hg update -r $H2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge -r $C3
   merging target
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
 Revisions present in repository heads may not be censored
 
   $ hg update -C -r $H2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg --config extensions.censor= censor -r $H2 target
   abort: cannot censor file in heads (78a8fc215e79)
   (clean/delete and commit first)
   [255]
   $ echo 'twiddling thumbs' > bystander
   $ hg ci -m 'bystander commit'
   $ H2=`hg id --debug -i`
   $ hg --config extensions.censor= censor -r "$H2^" target
   abort: cannot censor file in heads (efbe78065929)
   (clean/delete and commit first)
   [255]
 
 Cannot censor working directory
 
   $ echo 'seriously no passwords' > target
   $ hg ci -m 'extend second head arbitrarily' target
   $ H2=`hg id --debug -i`
   $ hg update -r "$H2^"
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg --config extensions.censor= censor -r . target
   abort: cannot censor working directory
   (clean/delete/update first)
   [255]
   $ hg update -r $H2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Can re-add file after being deleted + censored
 
   $ C4=$H2
   $ hg rm target
   $ hg ci -m 'delete target so it may be censored'
   $ H2=`hg id --debug -i`
   $ hg --config extensions.censor= censor -r $C4 target
   $ hg cat -r $C4 target | head -n 10
   $ hg cat -r "$H2^^" target | head -n 10
   Tainted file now super sanitized
   $ echo 'fresh start' > target
   $ hg add target
   $ hg ci -m reincarnated target
   $ H2=`hg id --debug -i`
   $ hg cat -r $H2 target | head -n 10
   fresh start
   $ hg cat -r "$H2^" target | head -n 10
   target: no such file in rev 452ec1762369
   $ hg cat -r $C4 target | head -n 10
   $ hg cat -r "$H2^^^" target | head -n 10
   Tainted file now super sanitized
 
 Can censor enough revision to move back to inline storage
 
   $ hg debugrevlogstats | grep target
   rev-count   data-size inl type      target 
           8         ??? no  file      target (glob) (revlogv2 !)
           8         ??? yes file      target (glob) (revlogv1 !)
-  $ cat /dev/rand?m | dd bs=512 count=200 2> /dev/null | f --hexdump > target
+  $ $TESTDIR/seq.py 4000 | $TESTDIR/sha256line.py > target
   $ hg ci -m 'add 100k passwords'
   $ H2=`hg id --debug -i`
   $ C5=$H2
   $ hg revert -r "$H2^" target
   $ hg ci -m 'cleaned 100k passwords'
   $ H2=`hg id --debug -i`
   $ hg debugrevlogstats | grep target
   rev-count   data-size inl type      target 
          10      ?????? no  file      target (glob)
   $ hg --config extensions.censor= censor -r $C5 target
 
 The important part is for the censor operation to not crash and the repository
 to not be corrupted.  Right now this involve keeping the revlog split.
 
   $ hg debugrevlogstats | grep target
   rev-count   data-size inl type      target 
          10         ??? no  file      target (glob)
   $ hg cat -r $C5 target | head -n 10
   $ hg cat -r $H2 target | head -n 10
   fresh start
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   checking dirstate
   checked 12 changesets with 13 changes to 2 files
 
 Repo with censored nodes can be cloned and cloned nodes are censored
 
   $ cd ..
   $ hg clone r rclone
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd rclone
   $ hg cat -r $H1 target | head -n 10
   advanced head H1
   $ hg cat -r $H2~5 target | head -n 10
   Tainted file now super sanitized
   $ hg cat -r $C2 target | head -n 10
   $ hg cat -r $C1 target | head -n 10
   $ hg cat -r 0 target | head -n 10
   Initially untainted file
   $ hg verify -q
 
 Repo cloned before tainted content introduced can pull censored nodes
 
   $ cd ../rpull
   $ hg cat -r tip target | head -n 10
   Initially untainted file
   $ hg verify -q
   $ hg pull -r $H1 -r $H2
   pulling from $TESTTMP/r
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 11 changesets with 11 changes to 2 files (+1 heads)
   new changesets * (glob)
   (run 'hg heads' to see heads, 'hg merge' to merge)
   $ hg update 4
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat target | head -n 10
   Tainted file now super sanitized
   $ hg cat -r $H1 target | head -n 10
   advanced head H1
   $ hg cat -r $H2~5 target | head -n 10
   Tainted file now super sanitized
   $ hg cat -r $C2 target | head -n 10
   $ hg cat -r $C1 target | head -n 10
   $ hg cat -r 0 target | head -n 10
   Initially untainted file
   $ hg verify -q
 
 Censored nodes can be pushed if they censor previously unexchanged nodes
 
   $ echo 'Passwords: hunter2hunter2' > target
   $ hg ci -m 're-add password from clone' target
   created new head
   $ H3=`hg id --debug -i`
   $ REV=$H3
   $ echo 'Re-sanitized; nothing to see here' > target
   $ hg ci -m 're-sanitized' target
   $ H2=`hg id --debug -i`
   $ CLEANREV=$H2
   $ hg cat -r $REV target | head -n 10
   Passwords: hunter2hunter2
   $ hg --config extensions.censor= censor -r $REV target
   $ hg cat -r $REV target | head -n 10
   $ hg cat -r $CLEANREV target | head -n 10
   Re-sanitized; nothing to see here
   $ hg push -f -r $H2
   pushing to $TESTTMP/r
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 1 files (+1 heads)
 
   $ cd ../r
   $ hg cat -r $REV target | head -n 10
   $ hg cat -r $CLEANREV target | head -n 10
   Re-sanitized; nothing to see here
   $ hg update $CLEANREV
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat target | head -n 10
   Re-sanitized; nothing to see here
 
 Censored nodes can be bundled up and unbundled in another repo
 
   $ hg bundle --base 0 ../pwbundle
   13 changesets found
   $ cd ../rclone
   $ hg unbundle ../pwbundle
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 2 files (+1 heads)
   new changesets * (glob)
   (run 'hg heads .' to see heads, 'hg merge' to merge)
   $ hg cat -r $REV target | head -n 10
   $ hg cat -r $CLEANREV target | head -n 10
   Re-sanitized; nothing to see here
   $ hg update $CLEANREV
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat target | head -n 10
   Re-sanitized; nothing to see here
   $ hg verify -q
 
 Grepping only warns, doesn't error out
 
   $ cd ../rpull
   $ hg grep 'Normal file'
   bystander:Normal file v2
   $ hg grep nothing
   target:Re-sanitized; nothing to see here
   $ hg grep --diff 'Normal file'
   cannot search in censored file: target:7
   cannot search in censored file: target:10
   cannot search in censored file: target:12
   bystander:6:-:Normal file v2
   cannot search in censored file: target:1
   cannot search in censored file: target:2
   cannot search in censored file: target:3
   bystander:2:-:Normal file here
   bystander:2:+:Normal file v2
   bystander:0:+:Normal file here
   $ hg grep --diff nothing
   cannot search in censored file: target:7
   cannot search in censored file: target:10
   cannot search in censored file: target:12
   target:13:+:Re-sanitized; nothing to see here
   cannot search in censored file: target:1
   cannot search in censored file: target:2
   cannot search in censored file: target:3
 
 Censored nodes can be imported on top of censored nodes, consecutively
 
   $ hg init ../rimport
   $ hg bundle --base 1 ../rimport/splitbundle
   12 changesets found
   $ cd ../rimport
   $ hg pull -r $H1 -r $H2 ../r
   pulling from ../r
   adding changesets
   adding manifests
   adding file changes
   added 8 changesets with 10 changes to 2 files (+1 heads)
   new changesets e97f55b2665a:dcbaf17bf3a1
   (run 'hg heads' to see heads, 'hg merge' to merge)
   $ hg unbundle splitbundle
   adding changesets
   adding manifests
   adding file changes
   added 6 changesets with 5 changes to 2 files (+1 heads)
   new changesets * (glob)
   (run 'hg heads .' to see heads, 'hg merge' to merge)
   $ hg update $H2
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat target | head -n 10
   Re-sanitized; nothing to see here
   $ hg verify -q
   $ cd ../r
 
 Can import bundle where first revision of a file is censored
 
   $ hg init ../rinit
   $ hg --config extensions.censor= censor -r 0 target
   $ hg bundle -r 0 --base null ../rinit/initbundle
   1 changesets found
   $ cd ../rinit
   $ hg unbundle initbundle
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 2 changes to 2 files
   new changesets e97f55b2665a (1 drafts)
   (run 'hg update' to get a working copy)
   $ hg cat -r 0 target | head -n 10
 
 #if revlogv2
 
 Testing feature that does not work in revlog v1
 ===============================================
 
 Censoring a revision that is used as delta base
 -----------------------------------------------
 
   $ cd ..
   $ hg init censor-with-delta
   $ cd censor-with-delta
   $ echo root > target
   $ hg add target
   $ hg commit -m root
   $ B0=`hg id --debug -i`
   $ for x in `"$PYTHON" $TESTDIR/seq.py 0 50000`
   > do
   >   echo "Password: hunter$x" >> target
   > done
   $ hg ci -m 'write a long file'
   $ B1=`hg id --debug -i`
   $ echo 'small change (should create a delta)' >> target
   $ hg ci -m 'create a delta over the password'
 (should show that the last revision is a delta, not a snapshot)
   $ B2=`hg id --debug -i`
 
 Make sure the last revision is a delta against the revision we will censor
 
   $ hg debugdeltachain target -T '{rev} {chainid} {chainlen} {prevrev}\n'
   0 1 1 -1
   1 2 1 -1
   2 2 2 1
 
 Censor the file
 
   $ hg cat -r $B1 target | wc -l
    *50002 (re)
   $ hg --config extensions.censor= censor -r $B1 target
   $ hg cat -r $B1 target | wc -l
    *0 (re)
 
 Check the children is fine
 
   $ hg cat -r $B2 target | wc -l
    *50003 (re)
 
 #endif
 
 Testing repository upgrade with censors revision
 ================================================
 
   $ cd ../rclone
 
 With the "abort" policy
 =======================
 
   $ hg verify --config censor.policy=ignore
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   checking dirstate
   checked 14 changesets with 15 changes to 2 files
   $ hg debugupgraderepo --run --quiet \
   > --optimize re-delta-parent \
   > --config censor.policy=abort
   upgrade will perform the following actions:
   
   requirements
      preserved: * (glob)
   
   optimisations: re-delta-parent
   
   processed revlogs:
     - all-filelogs
     - changelog
     - manifest
   
   $ hg verify  --config censor.policy=ignore
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   checking dirstate
   checked 14 changesets with 15 changes to 2 files
 
 With the "ignore" policy
 ========================
 
   $ hg verify --config censor.policy=ignore
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   checking dirstate
   checked 14 changesets with 15 changes to 2 files
   $ hg debugupgraderepo --run --quiet \
   > --optimize re-delta-parent \
   > --config censor.policy=ignore
   upgrade will perform the following actions:
   
   requirements
      preserved: * (glob)
   
   optimisations: re-delta-parent
   
   processed revlogs:
     - all-filelogs
     - changelog
     - manifest
   
   $ hg verify --config censor.policy=ignore
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   checking dirstate
   checked 14 changesets with 15 changes to 2 files