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  22 .TH FINDUNREF 1ONBLD "Oct 30, 2012"
  23 .I findunref
  24 \- find unused files in a source tree
  25 .SH SYNOPSIS
  26 findunref [\fB-s\fP \fIsubtree\fP] [\fB-t\fP \fItstampfile\fP]
  27 [\fB-S\fP \fBhg\fP|\fBtw\fP|\fBgit\fP] \fIsrcroot\fP \fIexceptfile\fP
  28 .SH DESCRIPTION
  29 .LP
  30 The findunref utility lists the files in a source tree which have not been
  31 accessed more recently than a particular timestamp file.  Although
  32 findunref may be used on its own, it is usually invoked by
  33 \fBnightly\fP(1ONBLD) to find files that are never referenced during a given
  34 build (see \fB-f\fP in \fBnightly\fP(1ONBLD)).
  35 .LP
  36 The root of the source tree to examine is specified by \fIsrcroot\fP.  To
  37 simplify comparing findunref output from different source trees, findunref
  38 outputs all filenames relative to \fIsrcroot\fP.
  39 .LP
  40 Some files in a source tree may be intentionally unreferenced (e.g.,
  41 documentation) or only referenced during specialized types of builds.
  42 Accordingly, \fIexceptfile\fP names a file containing a list of pathname
  43 globs that will be ignored by findunref.  Within \fIexceptfile\fP, any
  44 lines consisting solely of whitespace or starting with \fB#\fP will be
  45 ignored.  Directory globs may also be specified, which will cause any
  46 matching directories to be skipped entirely.  If no exceptions are
  47 desired, \fIexceptfile\fP can be \fB/dev/null\fP.
  48 .LP
  49 Depending on how findunref is invoked, it can either check all files, or
  50 limit its checks to files under control of a specific source code
  51 management (SCM) system.
  52 .LP
  53 To limit checks to files managed by Mercurial, the \fBhg\fP(1) utility must be
  54 present in \fB$PATH\fP and any relevant repositories must be located at or
  55 under \fIsrcroot\fP.  Nested Mercurial repositories are supported.
  56 .LP
  57 To limit checks to files managed by Git, the \fBgit\fP(1) utility must be
  58 present in \fB$PATH\fP and any relevant repositories must be located at or
  59 under \fIsrcroot\fP.  Nested Git repositories are \fInot\fR supported.
  60 .SH OPTIONS
  61 .TP 10
  62 .B -s \fIsubtree\fP
  63 Only look under \fIsubtree\fP for unreferenced files.  By default, all
  64 directories under \fIsrcroot\fP are examined.
  65 .TP 10
  66 .B -t \fItstampfile\fP
  67 Consider files older than \fItstampfile\fP to be unreferenced.
  68 By default, \fIsrcroot\fB/.build.tstamp\fR is used.
  69 .TP 10
  70 .B -S \fBhg\fP|\fBtw\fP|\fBgit\fP
  71 Only check files that are managed by the specified SCM.  To simplify
  72 interaction with \fBwhich_scm\fP(1ONBLD), the SCM names "mercurial" and
  73 "teamware" may also be specified for "hg" and "tw", respectively.
  74 By default, all files are checked.
  75 .SH SEE ALSO
  76 .LP
  77 \fBgit\fP(1),
  78 \fBhg\fP(1),
  79 \fBnightly\fP(1ONBLD),
  80 \fBwhich_scm\fP(1ONBLD)
  81 .SH NOTES
  82 Since many files are only used when building for a particular ISA (e.g.,
  83 Makefiles that are specific to x86 or SPARC), builds must be done on all
  84 applicable ISAs and the results merged.  For instance, if nightly builds
  85 (with \fB-f\fP) are done on both SPARC and x86, \fBusr/src\fP will be
  86 populated with a corresponding \fBunref-\fIisa\fB.out\fR file, which can
  87 be merged with \fBcomm\fP(1):
  88 .LP
  89 .nf
  90 comm -12 /path/to/unref-i386.out
  91          /path/to/unref-sparc.out > unref.out
  92 .fi
  93 .LP
  94 This merged file can then be compared against the gate's latest
  95 unreferenced file list (e.g. \fB/ws/onnv-gate/usr/src/unrefmaster.out\fP).
  96 .LP
  97 Different gates have different unreferenced file policies.  Any changes to
  98 \fIexceptfile\fP that would define new unreferenced file policies for a
  99 given gate must be cleared with the appropriate gatekeepers.