--- a/mercurial/debugcommands.py Thu Oct 12 09:04:12 2023 +0200
+++ b/mercurial/debugcommands.py Mon Sep 18 23:26:00 2023 +0200
@@ -105,9 +105,7 @@
)
from .revlogutils import (
- constants as revlog_constants,
debug as revlog_debug,
- deltas as deltautil,
nodemap,
rewrite,
sidedata,
@@ -799,200 +797,23 @@
The sparse read can be enabled with experimental.sparse-read = True
"""
- r = cmdutil.openrevlog(
+ revlog = cmdutil.openrevlog(
repo, b'debugdeltachain', file_, pycompat.byteskwargs(opts)
)
- index = r.index
- start = r.start
- length = r.length
- generaldelta = r.delta_config.general_delta
- withsparseread = r.data_config.with_sparse_read
-
- # security to avoid crash on corrupted revlogs
- total_revs = len(index)
-
- chain_size_cache = {}
-
- def revinfo(rev):
- e = index[rev]
- compsize = e[revlog_constants.ENTRY_DATA_COMPRESSED_LENGTH]
- uncompsize = e[revlog_constants.ENTRY_DATA_UNCOMPRESSED_LENGTH]
-
- base = e[revlog_constants.ENTRY_DELTA_BASE]
- p1 = e[revlog_constants.ENTRY_PARENT_1]
- p2 = e[revlog_constants.ENTRY_PARENT_2]
-
- # If the parents of a revision has an empty delta, we never try to delta
- # against that parent, but directly against the delta base of that
- # parent (recursively). It avoids adding a useless entry in the chain.
- #
- # However we need to detect that as a special case for delta-type, that
- # is not simply "other".
- p1_base = p1
- if p1 != nullrev and p1 < total_revs:
- e1 = index[p1]
- while e1[revlog_constants.ENTRY_DATA_COMPRESSED_LENGTH] == 0:
- new_base = e1[revlog_constants.ENTRY_DELTA_BASE]
- if (
- new_base == p1_base
- or new_base == nullrev
- or new_base >= total_revs
- ):
- break
- p1_base = new_base
- e1 = index[p1_base]
- p2_base = p2
- if p2 != nullrev and p2 < total_revs:
- e2 = index[p2]
- while e2[revlog_constants.ENTRY_DATA_COMPRESSED_LENGTH] == 0:
- new_base = e2[revlog_constants.ENTRY_DELTA_BASE]
- if (
- new_base == p2_base
- or new_base == nullrev
- or new_base >= total_revs
- ):
- break
- p2_base = new_base
- e2 = index[p2_base]
-
- if generaldelta:
- if base == p1:
- deltatype = b'p1'
- elif base == p2:
- deltatype = b'p2'
- elif base == rev:
- deltatype = b'base'
- elif base == p1_base:
- deltatype = b'skip1'
- elif base == p2_base:
- deltatype = b'skip2'
- elif r.issnapshot(rev):
- deltatype = b'snap'
- elif base == rev - 1:
- deltatype = b'prev'
- else:
- deltatype = b'other'
- else:
- if base == rev:
- deltatype = b'base'
- else:
- deltatype = b'prev'
-
- chain = r._deltachain(rev)[0]
- chain_size = 0
- for iter_rev in reversed(chain):
- cached = chain_size_cache.get(iter_rev)
- if cached is not None:
- chain_size += cached
- break
- e = index[iter_rev]
- chain_size += e[revlog_constants.ENTRY_DATA_COMPRESSED_LENGTH]
- chain_size_cache[rev] = chain_size
-
- return p1, p2, compsize, uncompsize, deltatype, chain, chain_size
-
fm = ui.formatter(b'debugdeltachain', pycompat.byteskwargs(opts))
- fm.plain(
- b' rev p1 p2 chain# chainlen prev delta '
- b'size rawsize chainsize ratio lindist extradist '
- b'extraratio'
- )
- if withsparseread:
- fm.plain(b' readsize largestblk rddensity srchunks')
- fm.plain(b'\n')
-
- chainbases = {}
- for rev in r:
- p1, p2, comp, uncomp, deltatype, chain, chainsize = revinfo(rev)
- chainbase = chain[0]
- chainid = chainbases.setdefault(chainbase, len(chainbases) + 1)
- basestart = start(chainbase)
- revstart = start(rev)
- lineardist = revstart + comp - basestart
- extradist = lineardist - chainsize
- try:
- prevrev = chain[-2]
- except IndexError:
- prevrev = -1
-
- if uncomp != 0:
- chainratio = float(chainsize) / float(uncomp)
- else:
- chainratio = chainsize
-
- if chainsize != 0:
- extraratio = float(extradist) / float(chainsize)
- else:
- extraratio = extradist
-
+ lines = revlog_debug.debug_delta_chain(revlog)
+ # first entry is the header
+ header = next(lines)
+ fm.plain(header)
+ for entry in lines:
+ label = b' '.join(e[0] for e in entry)
+ format = b' '.join(e[1] for e in entry)
+ values = [e[3] for e in entry]
+ data = dict((e[2], e[3]) for e in entry)
fm.startitem()
- fm.write(
- b'rev p1 p2 chainid chainlen prevrev deltatype compsize '
- b'uncompsize chainsize chainratio lindist extradist '
- b'extraratio',
- b'%7d %7d %7d %7d %8d %8d %7s %10d %10d %10d %9.5f %9d %9d %10.5f',
- rev,
- p1,
- p2,
- chainid,
- len(chain),
- prevrev,
- deltatype,
- comp,
- uncomp,
- chainsize,
- chainratio,
- lineardist,
- extradist,
- extraratio,
- rev=rev,
- chainid=chainid,
- chainlen=len(chain),
- prevrev=prevrev,
- deltatype=deltatype,
- compsize=comp,
- uncompsize=uncomp,
- chainsize=chainsize,
- chainratio=chainratio,
- lindist=lineardist,
- extradist=extradist,
- extraratio=extraratio,
- )
- if withsparseread:
- readsize = 0
- largestblock = 0
- srchunks = 0
-
- for revschunk in deltautil.slicechunk(r, chain):
- srchunks += 1
- blkend = start(revschunk[-1]) + length(revschunk[-1])
- blksize = blkend - start(revschunk[0])
-
- readsize += blksize
- if largestblock < blksize:
- largestblock = blksize
-
- if readsize:
- readdensity = float(chainsize) / float(readsize)
- else:
- readdensity = 1
-
- fm.write(
- b'readsize largestblock readdensity srchunks',
- b' %10d %10d %9.5f %8d',
- readsize,
- largestblock,
- readdensity,
- srchunks,
- readsize=readsize,
- largestblock=largestblock,
- readdensity=readdensity,
- srchunks=srchunks,
- )
-
+ fm.write(label, format, *values, **data)
fm.plain(b'\n')
-
fm.end()