upstream/mercurial-mirror Files · tests/test-simple-update.t

posix: always seek to EOF when opening a file in append mode...

posix: always seek to EOF when opening a file in append mode Python 3 already does this, so skip it there. Consider the program: #include <stdio.h> int main() { FILE *f = fopen("narf", "w"); fprintf(f, "narf\n"); fclose(f); f = fopen("narf", "a"); printf("%ld\n", ftell(f)); fprintf(f, "troz\n"); printf("%ld\n", ftell(f)); return 0; } on macOS, FreeBSD, and Linux with glibc, this program prints 5 10 but on musl libc (Alpine Linux and probably others) this prints 0 10 By my reading of https://pubs.opengroup.org/onlinepubs/009695399/functions/fopen.html this is technically correct, specifically: > Opening a file with append mode (a as the first character in the > mode argument) shall cause all subsequent writes to the file to be > forced to the then current end-of-file, regardless of intervening > calls to fseek(). in other words, the file position doesn't really matter in append-mode files, and we can't depend on it being at all meaningful unless we perform a seek() before tell() after open(..., 'a'). Experimentally after a .write() we can do a .tell() and it'll always be reasonable, but I'm unclear from reading the specification if that's a smart thing to rely on. This matches what we do on Windows and what Python 3 does for free, so let's just be consistent. Thanks to Yuya for the idea.

Valentin Gatien-Baron - - Load All Authors

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        $ hg init test

        $ cd test

        $ echo foo>foo

        $ hg addremove

        adding foo

        $ hg commit -m "1"

        $ hg verify

        checking changesets

        checking manifests

        crosschecking files in changesets and manifests

        checking files

        checked 1 changesets with 1 changes to 1 files

        $ hg clone . ../branch

        updating to branch default

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ cd ../branch

        $ hg co

        0 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ echo bar>>foo

        $ hg commit -m "2"

        $ cd ../test

        $ hg pull ../branch

        pulling from ../branch

        searching for changes

        adding changesets

        adding manifests

        adding file changes

        added 1 changesets with 1 changes to 1 files

        new changesets 30aff43faee1

        1 local changesets published

        (run 'hg update' to get a working copy)

        $ hg verify

        checking changesets

        checking manifests

        crosschecking files in changesets and manifests

        checking files

        checked 2 changesets with 2 changes to 1 files

        $ hg co

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ cat foo

        foo

        bar

        $ hg manifest --debug

        6f4310b00b9a147241b071a60c28a650827fb03d 644   foo

      update to rev 0 with a date

        $ hg upd -d foo 0

        abort: you can't specify a revision and a date

        [255]

      update to default destination (with empty revspec)

        $ hg update -q null

        $ hg update

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ hg id

        30aff43faee1 tip

        $ hg update -q null

        $ hg update -r ''

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ hg id

        30aff43faee1 tip

        $ hg update -q null

        $ hg update ''

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ hg id

        30aff43faee1 tip

        $ cd ..

      update with worker processes

      #if no-windows

        $ cat <<EOF > forceworker.py

        > from mercurial import extensions, worker

        > def nocost(orig, ui, costperop, nops, threadsafe=True):

        >     return worker._numworkers(ui) > 1

        > def uisetup(ui):

        >     extensions.wrapfunction(worker, 'worthwhile', nocost)

        > EOF

        $ hg init worker

        $ cd worker

        $ cat <<EOF >> .hg/hgrc

        > [extensions]

        > forceworker = $TESTTMP/forceworker.py

        > [worker]

        > numcpus = 4

        > EOF

        $ for i in `"$PYTHON" $TESTDIR/seq.py 1 100`; do

        >   echo $i > $i

        > done

        $ hg ci -qAm 'add 100 files'

        $ hg update null

        0 files updated, 0 files merged, 100 files removed, 0 files unresolved

        $ hg update -v | grep 100

        getting 100

        100 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ cd ..

      #endif

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				$ hg init test
				$ cd test
				$ echo foo>foo
				$ hg addremove
				adding foo
				$ hg commit -m "1"

				$ hg verify
				checking changesets
				checking manifests
				crosschecking files in changesets and manifests
				checking files
				checked 1 changesets with 1 changes to 1 files

				$ hg clone . ../branch
				updating to branch default
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved
				$ cd ../branch
				$ hg co
				0 files updated, 0 files merged, 0 files removed, 0 files unresolved
				$ echo bar>>foo
				$ hg commit -m "2"

				$ cd ../test

				$ hg pull ../branch
				pulling from ../branch
				searching for changes
				adding changesets
				adding manifests
				adding file changes
				added 1 changesets with 1 changes to 1 files
				new changesets 30aff43faee1
				1 local changesets published
				(run 'hg update' to get a working copy)

				$ hg verify
				checking changesets
				checking manifests
				crosschecking files in changesets and manifests
				checking files
				checked 2 changesets with 2 changes to 1 files

				$ hg co
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved

				$ cat foo
				foo
				bar

				$ hg manifest --debug
				6f4310b00b9a147241b071a60c28a650827fb03d 644 foo

				update to rev 0 with a date

				$ hg upd -d foo 0
				abort: you can't specify a revision and a date
				[255]

				update to default destination (with empty revspec)

				$ hg update -q null
				$ hg update
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved
				$ hg id
				30aff43faee1 tip

				$ hg update -q null
				$ hg update -r ''
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved
				$ hg id
				30aff43faee1 tip

				$ hg update -q null
				$ hg update ''
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved
				$ hg id
				30aff43faee1 tip

				$ cd ..

				update with worker processes

				#if no-windows

				$ cat <<EOF > forceworker.py
				> from mercurial import extensions, worker
				> def nocost(orig, ui, costperop, nops, threadsafe=True):
				> return worker._numworkers(ui) > 1
				> def uisetup(ui):
				> extensions.wrapfunction(worker, 'worthwhile', nocost)
				> EOF

				$ hg init worker
				$ cd worker
				$ cat <<EOF >> .hg/hgrc
				> [extensions]
				> forceworker = $TESTTMP/forceworker.py
				> [worker]
				> numcpus = 4
				> EOF
				$ for i in `"$PYTHON" $TESTDIR/seq.py 1 100`; do
				> echo $i > $i
				> done
				$ hg ci -qAm 'add 100 files'

				$ hg update null
				0 files updated, 0 files merged, 100 files removed, 0 files unresolved
				$ hg update -v \| grep 100
				getting 100
				100 files updated, 0 files merged, 0 files removed, 0 files unresolved

				$ cd ..

				#endif