NAME¶

uscan - scan/watch upstream sources for new releases of software

SYNOPSIS¶

uscan [options] [path]

DESCRIPTION¶

For basic usage, uscan is executed without any arguments from the root of the Debianized source tree where you see the debian/ directory, or a directory containing multiple source trees.

Unless --watchfile is given, uscan looks recursively for valid source trees starting from the current directory (see the below section "Directory name checking" for details).

For each valid source tree found, typically the following happens:

• uscan reads the first entry in debian/changelog to determine the source package name <spkg> and the last upstream version.
• uscan process the watch lines debian/watch from the top to the bottom in a single pass.

•

uscan invokes uupdate to create the Debianized source tree: ../<spkg>-<oversion>/*

Please note the following.

• For simplicity, the compression method used in examples is gzip with .gz suffix. Other methods such as xz, bzip2, and lzma with corresponding xz, bz2 and lzma suffixes may also be used.
• The new version=4 enables handling of multiple upstream tarball (MUT) packages but this is a rare case for Debian packaging. For a single upstream tarball package, there is only one watch line and no ../<spkg>_<oversion>.orig-<component>.tar.gz .
• uscan with the --verbose option produces a human readable report of uscan's execution.
• uscan with the --debug option produces a human readable report of uscan's execution including internal variable states.
• uscan with the --extra-debug option produces a human readable report of uscan's execution including internal variable states and remote content during "search" step.
• uscan with the --dehs option produces an upstream package status report in XML format for other programs such as the Debian External Health System.
• The primary objective of uscan is to help identify if the latest version upstream tarball is used or not; and to download the latest upstream tarball. The ordering of versions is decided by dpkg --compare-versions.
• uscan with the --safe option limits the functionality of uscan to its primary objective. Both the repacking of downloaded files and updating of the source tree are skipped to avoid running unsafe scripts. This also changes the default to --no-download and --skip-signature.

FORMAT OF THE WATCH FILE¶

The current version 4 format of debian/watch can be summarized as follows:

• Leading spaces and tabs are dropped.
• Empty lines are dropped.
• A line started by # (hash) is a comment line and dropped.
• A single \ (back slash) at the end of a line is dropped and the next line is concatenated after removing leading spaces and tabs. The concatenated line is parsed as a single line. (The existence or non-existence of the space before the tailing single \ is significant.)
• The first non-comment line is:

•

The following non-comment lines (watch lines) specify the rules for the selection of the candidate upstream tarball URLs and are in one of the following three formats:

There are a few special strings which are substituted by uscan to make it easy to write the watch file.

@PACKAGE@

This is substituted with the source package name found in the first line of the debian/changelog file.

@ANY_VERSION@

This is substituted by the legal upstream version regex (capturing).

  [-_]?(\d[\-+\.:\~\da-zA-Z]*)
    

@ARCHIVE_EXT@

This is substituted by the typical archive file extension regex (non-capturing).

  (?i)(?:\.(?:tar\.xz|tar\.bz2|tar\.gz|tar\.zstd?|zip|tgz|tbz|txz))
    

@SIGNATURE_EXT@

This is substituted by the typical signature file extension regex (non-capturing).

  (?i)(?:\.(?:tar\.xz|tar\.bz2|tar\.gz|tar\.zstd?|zip|tgz|tbz|txz))'(?:\.(?:asc|pgp|gpg|sig|sign))'
    

@DEB_EXT@

This is substituted by the typical Debian extension regexp (capturing).

  [\+~](debian|dfsg|ds|deb)(\.)?(\d+)?$
    

Some file extensions are not included in the above intentionally to avoid false positives. You can still set such file extension patterns manually.

WATCH FILE OPTIONS¶

uscan reads the watch options specified in opts=" ... " to customize its behavior. Multiple options option1, option2, option3, ... can be set as opts="option1, option2, option3, ... " . The double quotes are necessary if options contain any spaces.

Unless otherwise noted as persistent, most options are valid only within their containing watch line.

The available watch options are:

component=component

Set the name of the secondary source tarball as <spkg>_<oversion>.orig-<component>.tar.gz for a MUT package.

ctype=component-type

Set the type of component (only "nodejs" and "perl" are available for now). This will help uscan to find current version if component version is ignored.

When using ctype=nodejs, uscan tries to find a version in "package.json", when using ctype=perl, uscan tries to find a version in "META.json". If a version is found, it is used as current version for this component, regardless version found in Debian version string. This permits a better change detection when using ignore or checksum as Debian version.

compression=method

Set the compression method when the tarball is repacked (persistent).

Available method values are what mk-origtargz supports, so xz, gzip (alias gz), bzip2 (alias bz2), lzma, default. The default method is currently xz. When uscan is launched in a debian source repository which format is "1.0" or undefined, the method switches to gzip.

Please note the repacking of the upstream tarballs by mk-origtargz happens only if one of the following conditions is satisfied:

repack

Force repacking of the upstream tarball using the compression method.

repacksuffix=suffix

Add suffix to the Debian package upstream version only when the source tarball is repackaged. This rule should be used only for a single upstream tarball package.

mode=mode

Set the archive download mode.

pretty=rule

Set the upstream version string to an arbitrary format as an optional opts argument when the matching-pattern is HEAD or heads/branch for git mode. For the exact syntax, see the git-log manpage under tformat. The default is pretty=0.0~git%cd.%h. No uversionmangle rules is applicable for this case.

When pretty=describe is used, the upstream version string is the output of the "git describe --tags | sed s/-/./g" command instead. For example, if the commit is the 5-th after the last tag v2.17.12 and its short hash is ged992511, then the string is v2.17.12.5.ged992511 . For this case, it is good idea to add uversionmangle=s/^/0.0~/ or uversionmangle=s/^v// to make the upstream version string compatible with Debian. uversionmangle=s/^v// may work as well. Please note that in order for pretty=describe to function well, upstream need to avoid tagging with random alphabetic tags.

The pretty=describe forces to set gitmode=full to make a full local clone of the repository automatically.

date=rule

Set the date string used by the pretty option to an arbitrary format as an optional opts argument when the matching-pattern is HEAD or heads/branch for git mode. For the exact syntax, see the strftime manpage. The default is date=%Y%m%d.

gitexport=mode

Set the git archive export operation mode. The default is gitexport=default. Set this to gitexport=all to include all files in the .orig.tar archive, ignoring any export-ignore git attributes defined by the upstream.

This option is valid only in git mode.

gitmode=mode

Set the git clone operation mode. The default is gitmode=shallow. For some dumb git server, you may need to manually set gitmode=full to force full clone operation.

If the current directory is a git repository and the searched repository is listed among the registered "remotes", then uscan will use it instead of cloning separately.

pgpmode=mode

Set the PGP/GPG signature verification mode.

searchmode=mode

Set the parsing search mode.

decompress

Decompress compressed archive before the pgp/gpg signature verification.

bare

Disable all site specific special case code such as URL redirector uses and page content alterations. (persistent)

user-agent=user-agent-string

Set the user-agent string used to contact the HTTP(S) server as user-agent-string. (persistent)

user-agent option should be specified by itself in the watch line without URL, to allow using semicolons and commas in it.

pasv, passive

Use PASV mode for the FTP connection.

If PASV mode is required due to the client side network environment, set uscan to use PASV mode via "COMMANDLINE OPTIONS" or "DEVSCRIPT CONFIGURATION VARIABLES" instead.

active, nopasv

Don't use PASV mode for the FTP connection.

unzipopt=options

Add the extra options to use with the unzip command, such as -a, -aa, and -b, when executed by mk-origtargz.

dversionmangle=rules

Normalize the last upstream version string found in debian/changelog to compare it to the available upstream tarball version. Removal of the Debian specific suffix such as s/@DEB_EXT@// is usually done here.

You can also use dversionmangle=auto, this is exactly the same than dversionmangle=s/@DEB_EXT@//

dirversionmangle=rules

Normalize the directory path string matching the regex in a set of parentheses of http://URL as the sortable version index string. This is used as the directory path sorting index only.

Substitution such as s/PRE/~pre/; s/RC/~rc/ may help.

pagemangle=rules

Normalize the downloaded web page string. (Don't use this unless this is absolutely needed. Generally, g flag is required for these rules.)

This is handy if you wish to access Amazon AWS or Subversion repositories in which <a href="..."> is not used.

uversionmangle=rules

Normalize the candidate upstream version strings extracted from hrefs in the source of the web page. This is used as the version sorting index when selecting the latest upstream version.

Substitution such as s/PRE/~pre/; s/RC/~rc/ may help.

versionmangle=rules

Syntactic shorthand for uversionmangle=rules, dversionmangle=rules

hrefdecode=percent-encoding

Convert the selected upstream tarball href string from the percent-encoded hexadecimal string to the decoded normal URL string for obfuscated web sites. Only percent-encoding is available and it is decoded with s/%([A-Fa-f\d]{2})/chr hex $1/eg.

downloadurlmangle=rules

Convert the selected upstream tarball href string into the accessible URL for obfuscated web sites. This is run after hrefdecode.

filenamemangle=rules

Generate the upstream tarball filename from the selected href string if matching-pattern can extract the latest upstream version <uversion> from the selected href string. Otherwise, generate the upstream tarball filename from its full URL string and set the missing <uversion> from the generated upstream tarball filename.

Without this option, the default upstream tarball filename is generated by taking the last component of the URL and removing everything after any '?' or '#'.

pgpsigurlmangle=rules

Generate the candidate upstream signature file URL string from the upstream tarball URL.

oversionmangle=rules

Generate the version string <oversion> of the source tarball <spkg>_<oversion>.orig.tar.gz from <uversion>. This should be used to add a suffix such as +dfsg1 to a MUT package.

Here, the mangling rules apply the rules to the pertinent string. Multiple rules can be specified in a mangling rule string by making a concatenated string of each mangling rule separated by ; (semicolon).

Each mangling rule cannot contain ; (semicolon), , (comma), or " (double quote).

Each mangling rule behaves as if a Perl command "$string =~ rule" is executed. There are some notable details.

•

rule may only use the s, tr, and y operations.

EXAMPLE OF EXECUTION¶

uscan reads the first entry in debian/changelog to determine the source package name and the last upstream version.

For example, if the first entry of debian/changelog is:

•

bar (3:2.03+dfsg1-4) unstable; urgency=low

then, the source package name is bar and the last Debian package version is 3:2.03+dfsg1-4.

The last upstream version is normalized to 2.03+dfsg1 by removing the epoch and the Debian revision.

If the dversionmangle rule exists, the last upstream version is further normalized by applying this rule to it. For example, if the last upstream version is 2.03+dfsg1 indicating the source tarball is repackaged, the suffix +dfsg1 is removed by the string substitution s/\+dfsg\d*$// to make the (dversionmangled) last upstream version 2.03 and it is compared to the candidate upstream tarball versions such as 2.03, 2.04, ... found in the remote site. Thus, set this rule as:

•

opts="dversionmangle=s/\+dfsg\d*$//"

uscan downloads a web page from http://URL specified in debian/watch.

• If the directory name part of URL has no parentheses, ( and ), it is taken as verbatim.
• If the directory name part of URL has parentheses, ( and ), then uscan recursively searches all possible directories to find a page for the newest version. If the dirversionmangle rule exists, the generated sorting index is used to find the newest version. If a specific version is specified for the download, the matching version string has priority over the newest version.

For example, this http://URL may be specified as:

•

http://www.example.org/@ANY_VERSION@/

Please note the trailing / in the above to make @ANY_VERSION@ as the directory.

If the pagemangle rule exists, the whole downloaded web page as a string is normalized by applying this rule to it. This is very powerful tool and needs to be used with caution. If other mangling rules can be used to address your objective, do not use this rule.

The downloaded web page is scanned for hrefs defined in the <a href=" ... "> tag to locate the candidate upstream tarball hrefs. These candidate upstream tarball hrefs are matched by the Perl regex pattern matching-pattern such as DL-(?:[\d\.]+?)/foo-(.+)\.tar\.gz to narrow down the candidates. This pattern match needs to be anchored at the beginning and the end. For example, candidate hrefs may be:

• DL-2.02/foo-2.02.tar.gz
• DL-2.03/foo-2.03.tar.gz
• DL-2.04/foo-2.04.tar.gz

Here the matching string of (.+) in matching-pattern is considered as the candidate upstream version. If there are multiple matching strings of capturing patterns in matching-pattern, they are all concatenated with . (period) to form the candidate upstream version. Make sure to use the non-capturing regex such as (?:[\d\.]+?) instead for the variable text matching part unrelated to the version.

Then, the candidate upstream versions are:

• 2.02
• 2.03
• 2.04

The downloaded tarball filename is basically set to the same as the filename in the remote URL of the selected href.

If the uversionmangle rule exists, the candidate upstream versions are normalized by applying this rule to them. (This rule may be useful if the upstream version scheme doesn't sort correctly to identify the newest version.)

The upstream tarball href corresponding to the newest (uversionmangled) candidate upstream version newer than the (dversionmangled) last upstream version is selected.

If multiple upstream tarball hrefs corresponding to a single version with different extensions exist, the highest compression one is chosen. (Priority: tar.xz > tar.lzma > tar.bz2 > tar.gz.)

If the selected upstream tarball href is the relative URL, it is converted to the absolute URL using the base URL of the web page. If the <base href=" ... "> tag exists in the web page, the selected upstream tarball href is converted to the absolute URL using the specified base URL in the base tag, instead.

If the downloadurlmangle rule exists, the selected upstream tarball href is normalized by applying this rule to it. (This is useful for some sites with the obfuscated download URL.)

If the filenamemangle rule exists, the downloaded tarball filename is generated by applying this rule to the selected href if matching-pattern can extract the latest upstream version <uversion> from the selected href string. Otherwise, generate the upstream tarball filename from its full URL string and set the missing <uversion> from the generated upstream tarball filename.

Without the filenamemangle rule, the default upstream tarball filename is generated by taking the last component of the URL and removing everything after any '?' or '#'.

uscan downloads the selected upstream tarball to the parent ../ directory. For example, the downloaded file may be:

•

../foo-2.04.tar.gz

Let's call this downloaded version 2.04 in the above example generically as <uversion> in the following.

If the pgpsigurlmangle rule exists, the upstream signature file URL is generated by applying this rule to the (downloadurlmangled) selected upstream tarball href and the signature file is tried to be downloaded from it.

If the pgpsigurlmangle rule doesn't exist, uscan warns user if the matching upstream signature file is available from the same URL with their filename being suffixed by the 5 common suffix asc, gpg, pgp, sig and sign. (You can avoid this warning by setting pgpmode=none.)

If the signature file is downloaded, the downloaded upstream tarball is checked for its authenticity against the downloaded signature file using the armored keyring debian/upstream/signing-key.asc (see "KEYRING FILE EXAMPLES"). If its signature is not valid, or not made by one of the listed keys, uscan will report an error.

If the oversionmangle rule exists, the source tarball version oversion is generated from the downloaded upstream version uversion by applying this rule. This rule is useful to add suffix such as +dfsg1 to the version of all the source packages of the MUT package for which the repacksuffix mechanism doesn't work.

uscan invokes mk-origtargz to create the source tarball properly named for the source package with .orig. (or .orig-<component>. for the secondary tarballs) in its filename.

case A: packaging of the upstream tarball as is

mk-origtargz creates a symlink ../bar_<oversion>.orig.tar.gz linked to the downloaded local upstream tarball. Here, bar is the source package name found in debian/changelog. The generated symlink may be:

case B: packaging of the upstream tarball after removing non-DFSG files

mk-origtargz checks the filename glob of the Files-Excluded stanza in the first section of debian/copyright, removes matching files to create a repacked upstream tarball. Normally, the repacked upstream tarball is renamed with suffix to ../bar_<oversion><suffix>.orig.tar.gz using the repacksuffix option for the single upstream package. Here <oversion> is updated to be <oversion><suffix>.

The removal of files is required if files are not DFSG-compliant. For such case, +dfsg1 is used as suffix.

So the combined options are set as opts="dversionmangle=s/\+dfsg\d*$// ,repacksuffix=+dfsg1", instead.

For example, the repacked upstream tarball may be:

uscan normally invokes "uupdate --find --upstream-version oversion " for the version=4 watch file.

Please note that --find option is used here since mk-origtargz has been invoked to make *.orig.tar.gz file already. uscan picks bar from debian/changelog.

It creates the new upstream source tree under the ../bar-<oversion> directory and Debianize it leveraging the last package contents.

WATCH FILE EXAMPLES¶

When writing the watch file, you should rely on the latest upstream source announcement web page. You should not try to second guess the upstream archive structure if possible. Here are the typical debian/watch files.

Please note that executing uscan with -v or -vv reveals what exactly happens internally.

The existence and non-existence of a space the before tailing \ (back slash) are significant.

Some undocumented shorter configuration strings are used in the below EXAMPLES to help you with typing. These are intentional ones. uscan is written to accept such common sense abbreviations but don't push the limit.

  version=4
  http://example.com/~user/release/@PACKAGE@.html \
      files/@PACKAGE@@ANY_VERSION@@ARCHIVE_EXT@

  version=4

  version=4
  opts="pgpsigurlmangle=s%$%.asc%" http://example.com/release/@PACKAGE@.html \
      files/@PACKAGE@@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts="pgpsigurlmangle=s%@ARCHIVE_EXT@$%.asc%,decompress" \
      http://example.com/release/@PACKAGE@.html \
      files/@PACKAGE@@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts="pgpmode=next" http://example.com/release/@PACKAGE@.html \
      files/(?:\d+)/@PACKAGE@@ANY_VERSION@@ARCHIVE_EXT@ debian
  opts="pgpmode=previous" http://example.com/release/@PACKAGE@.html \
      files/(?:\d+)/@PACKAGE@@ANY_VERSION@@SIGNATURE_EXT@ previous

  version=4
  opts="pgpmode=next" http://example.com/DL/ \
      files/(?:\d+)/@PACKAGE@@ANY_VERSION@@ARCHIVE_EXT@ debian
  opts="pgpmode=previous" http://example.com/DL/ \
      files/(?:\d+)/@PACKAGE@@ANY_VERSION@@SIGNATURE_EXT@ \
      previous

  version=4
  opts="pgpsigurlmangle=s%$%.sig%" \
      http://example.com/release/foo.html \
      files/foo-@ANY_VERSION@@ARCHIVE_EXT@ debian
  opts="pgpsigurlmangle=s%$%.sig%, component=bar" \
      http://example.com/release/foo.html \
      files/foobar-@ANY_VERSION@@ARCHIVE_EXT@ same
  opts="pgpsigurlmangle=s%$%.sig%, component=baz" \
      http://example.com/release/foo.html \
      files/foobaz-@ANY_VERSION@@ARCHIVE_EXT@ same

  version=4
  opts="pgpsigurlmangle=s%$%.sig%, dirversionmangle=s/-PRE/~pre/;s/-RC/~rc/" \
      http://tmrc.mit.edu/mirror/twisted/Twisted/@ANY_VERSION@/ \
      Twisted-@ANY_VERSION@@ARCHIVE_EXT@

  http://tmrc.mit.edu/mirror/twisted/Twisted/

  version=4
  opts="pgpsigurlmangle=s%$%.sig%" \
      http://www.cpan.org/modules/by-module/Text/ \
      Text-CSV_XS-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts="pgpsigurlmangle=s%$%.sig%" \
      http://www.cpan.org/modules/by-module/Text/Text-CSV_XS-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts="pgpsigurlmangle=s%$%.sig%" \
      http://www.cpan.org/modules/by-module/Text/\
      Text-CSV_XS-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  http://www.site.com/pub/foobar/foobar_v(\d+)_(\d+)@ARCHIVE_EXT@

  version=4
  opts="dversionmangle=s/\+dfsg\d*$//,repacksuffix=+dfsg1" \
  http://some.site.org/some/path/foobar-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts=filenamemangle=s/.*=(.*)/$1/ \
  http://foo.bar.org/dl/\?path=&dl=foo-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts=filenamemangle=s/.*=(.*)/foo-$1\.tar\.gz/ \
  http://foo.bar.org/dl/\?path=&dl_version=@ANY_VERSION@

  version=4
  opts=filenamemangle=s&.*/dl/(.*)/foo\.tar\.gz&foo-$1\.tar\.gz& \
  http://foo.bar.org/dl/@ANY_VERSION@/ foo.tar.gz

  version=4
  opts=downloadurlmangle=s/prdownload/download/ \
  http://developer.berlios.de/project/showfiles.php?group_id=2051 \
  http://prdownload.berlios.de/softdevice/vdr-softdevice-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts=oversionmangle=s/(.*)/$1+dfsg1/ \
  http://example.com/~user/release/foo.html \
  files/foo-@ANY_VERSION@@ARCHIVE_EXT@ debian
  opts="component=bar" \
  http://example.com/~user/release/foo.html \
  files/bar-@ANY_VERSION@@ARCHIVE_EXT@ same

  version=4
  opts=pagemangle="s/<a\s+bogus=/<a href=/g" \
  http://example.com/release/foo.html \
  files/@PACKAGE@@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts="pagemangle=s%<Key>([^<]*)</Key>%<Key><a href="$1">$1</a></Key>%g" \
  http://example.com/release/foo.html \
  (?:.*)/@PACKAGE@@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  ftp://ftp.tex.ac.uk/tex-archive/web/c_cpp/cweb/cweb-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  ftp://ftp.worldforge.org/pub/worldforge/libs/\
  Atlas-C++/transitional/Atlas-C\+\+-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts="uversionmangle=s/^/0.0./" \
  ftp://ftp.ibiblio.org/pub/Linux/ALPHA/wine/\
  development/Wine-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  https://sf.net/<project>/ <tar-name>-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  https://sf.net/audacity/ audacity-minsrc-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts="uversionmangle=s/-pre/~pre/, \
    filenamemangle=s%(?:.*)audacity-minsrc-(.+)\.tar\.xz/download%\
                         audacity-$1.tar.xz%" \
    http://sourceforge.net/projects/audacity/files/audacity/@ANY_VERSION@/ \
    (?:.*)audacity-minsrc-@ANY_VERSION@@ARCHIVE_EXT@/download

  version=4
  opts="filenamemangle=s%(?:.*?)?v?(\d[\d.]*@ARCHIVE_EXT@)%@PACKAGE@-$1%" \
      https://github.com/<user>/<project>/tags \
      (?:.*?/)?v?@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  https://pypi.python.org/packages/source/<initial>/<project>/ \
      <tar-name>-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  https://pypi.python.org/packages/source/c/cfn-sphere/ \
      cfn-sphere-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts="pgpmode=none" \
      https://pypi.python.org/pypi/cfn-sphere/ \
      https://pypi.python.org/packages/.*/.*/.*/\
      cfn-sphere-@ANY_VERSION@@ARCHIVE_EXT@#.*

  version=4
  opts="searchmode=plain" \
   https://registry.npmjs.org/aes-js \
   https://registry.npmjs.org/aes-js/-/aes-js-@ANY_VERSION@@ARCHIVE_EXT@

  version=4
  opts="searchmode=plain,pgpmode=none" \
    https://registry.npmjs.org/mongodb \
    https://registry.npmjs.org/mongodb/-/mongodb-@ANY_VERSION@@ARCHIVE_EXT@ group
  opts="searchmode=plain,pgpmode=none,component=bson" \
    https://registry.npmjs.org/bson \
    https://registry.npmjs.org/bson/-/bson-@ANY_VERSION@@ARCHIVE_EXT@ group
  opts="searchmode=plain,pgpmode=none,component=mongodb-core" \
    https://registry.npmjs.org/mongodb-core \
    https://registry.npmjs.org/mongodb-core/-/mongodb-core-@ANY_VERSION@@ARCHIVE_EXT@ group
  opts="searchmode=plain,pgpmode=none,component=requireoptional" \
    https://registry.npmjs.org/require_optional \
    https://registry.npmjs.org/require_optional/-/require_optional-@ANY_VERSION@@ARCHIVE_EXT@ group

  version=4
  opts="searchmode=plain,pgpmode=none" \
    https://registry.npmjs.org/mongodb \
    https://registry.npmjs.org/mongodb/-/mongodb-@ANY_VERSION@@ARCHIVE_EXT@ group
  opts="searchmode=plain,pgpmode=none,component=bson" \
    https://registry.npmjs.org/bson \
    https://registry.npmjs.org/bson/-/bson-@ANY_VERSION@@ARCHIVE_EXT@ checksum
  opts="searchmode=plain,pgpmode=none,component=mongodb-core" \
    https://registry.npmjs.org/mongodb-core \
    https://registry.npmjs.org/mongodb-core/-/mongodb-core-@ANY_VERSION@@ARCHIVE_EXT@ checksum
  opts="searchmode=plain,pgpmode=none,component=requireoptional" \
    https://registry.npmjs.org/require_optional \
    https://registry.npmjs.org/require_optional/-/require_optional-@ANY_VERSION@@ARCHIVE_EXT@ checksum

  Main: 2.0.6
  Comp1:         1 .     2 .     4
  Comp2:         2 .     0 .     1
  Comp3:        10 .     0
  ================================
  Result  : 1+2+10 . 2+0+0 .   4+1
  Checksum:     13 .     2 .     5
  ================================
  Final Version:   2.0.6+~cs13.2.5

  2.0.6+~1.2.4+~2.0.1+~10.0

  version=4
  opts="mode=git, gitmode=full, pgpmode=none" \
  http://git.ao2.it/tweeper.git \
  refs/tags/v@ANY_VERSION@

  version=4
  opts="mode=git, pgpmode=none" \
  https://github.com/Debian/dh-make-golang \
  HEAD

  version=4
  opts="mode=svn, pgpmode=none" \
  svn://svn.code.sf.net/p/jmol/code/tags/ \
  @ANY_VERSION@\/

  version=4
  opts="mode=svn, pgpmode=none" \
  svn://svn.code.sf.net/p/jmol/code/trunk/ \
  HEAD

COPYRIGHT FILE EXAMPLES¶

Here is an example for the debian/copyright file which initiates automatic repackaging of the upstream tarball into <spkg>_<oversion>.orig.tar.gz (In debian/copyright, the Files-Excluded and Files-Excluded-component stanzas are a part of the first paragraph and there is a blank line before the following paragraphs which contain Files and other stanzas.):

  Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
  Files-Excluded: exclude-this
   exclude-dir
   */exclude-dir
   .*
   */js/jquery.js
   Files: *
   Copyright: ...
   ...

Here is another example for the debian/copyright file which initiates automatic repackaging of the multiple upstream tarballs into <spkg>_<oversion>.orig.tar.gz and <spkg>_<oversion>.orig-bar.tar.gz:

  Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
  Files-Excluded: exclude-this
   exclude-dir
   */exclude-dir
   .*
   */js/jquery.js
  Files-Excluded-bar: exclude-this
   exclude-dir
   */exclude-dir
   .*
   */js/jquery.js
   Files: *
   Copyright: ...
   ...

See mk-origtargz(1).

KEYRING FILE EXAMPLES¶

Let's assume that the upstream "uscan test key (no secret) <none@debian.org>" signs its package with a secret OpenPGP key and publishes the corresponding public OpenPGP key. This public OpenPGP key can be identified in 3 ways using the hexadecimal form.

• The fingerprint as the 20 byte data calculated from the public OpenPGP key. E. g., 'CF21 8F0E 7EAB F584 B7E2 0402 C77E 2D68 7254 3FAF'
• The long keyid as the last 8 byte data of the fingerprint. E. g., 'C77E2D6872543FAF'
• The short keyid is the last 4 byte data of the fingerprint. E. g., '72543FAF'

Considering the existence of the collision attack on the short keyid, the use of the long keyid is recommended for receiving keys from the public key servers. You must verify the downloaded OpenPGP key using its full fingerprint value which you know is the trusted one.

The armored keyring file debian/upstream/signing-key.asc can be created by using the gpg (or gpg2) command as follows.

  $ gpg --recv-keys "C77E2D6872543FAF"
  ...
  $ gpg --finger "C77E2D6872543FAF"
  pub   4096R/72543FAF 2015-09-02
        Key fingerprint = CF21 8F0E 7EAB F584 B7E2  0402 C77E 2D68 7254 3FAF
  uid                  uscan test key (no secret) <none@debian.org>
  sub   4096R/52C6ED39 2015-09-02
  $ cd path/to/<upkg>-<uversion>
  $ mkdir -p debian/upstream
  $ gpg --export --export-options export-minimal --armor \
        'CF21 8F0E 7EAB F584 B7E2  0402 C77E 2D68 7254 3FAF' \
        >debian/upstream/signing-key.asc

The binary keyring files, debian/upstream/signing-key.pgp and debian/upstream-signing-key.pgp, are still supported but deprecated.

If a group of developers sign the package, you need to list fingerprints of all of them in the argument for gpg --export ... to make the keyring to contain all OpenPGP keys of them.

Sometimes you may wonder who made a signature file. You can get the public keyid used to create the detached signature file foo-2.0.tar.gz.asc by running gpg as:

  $ gpg -vv foo-2.0.tar.gz.asc
  gpg: armor: BEGIN PGP SIGNATURE
  gpg: armor header: Version: GnuPG v1
  :signature packet: algo 1, keyid C77E2D6872543FAF
        version 4, created 1445177469, md5len 0, sigclass 0x00
        digest algo 2, begin of digest 7a c7
        hashed subpkt 2 len 4 (sig created 2015-10-18)
        subpkt 16 len 8 (issuer key ID C77E2D6872543FAF)
        data: [4091 bits]
  gpg: assuming signed data in `foo-2.0.tar.gz'
  gpg: Signature made Sun 18 Oct 2015 11:11:09 PM JST using RSA key ID 72543FAF
  ...

COMMANDLINE OPTIONS¶

For the basic usage, uscan does not require to set these options.

--conffile, --conf-file

Add or replace default configuration files ("/etc/devscripts.conf" and "~/.devscripts"). This can only be used as the first option given on the command-line.

--no-conf, --noconf

Don't read any configuration files. This can only be used as the first option given on the command-line.

--no-verbose

Don't report verbose information. (default)

--verbose, -v

Report verbose information.

--debug, -vv

Report verbose information and some internal state values.

--extra-debug, -vvv

Report verbose information including the downloaded web pages as processed to STDERR for debugging.

--dehs

Send DEHS style output (XML-type) to STDOUT, while send all other uscan output to STDERR.

--no-dehs

Use only traditional uscan output format. (default)

--download, -d

Download the new upstream release. (default)

--force-download, -dd

Download the new upstream release even if up-to-date. (may not overwrite the local file)

--overwrite-download, -ddd

Download the new upstream release even if up-to-date. (may overwrite the local file)

--no-download, --nodownload

Don't download and report information.

Previously downloaded tarballs may be used.

Change default to --skip-signature.

--signature

Download signature. (default)

--no-signature

Don't download signature but verify if already downloaded.

--skip-signature

Don't bother download signature nor verifying signature.

--safe, --report

Avoid running unsafe scripts by skipping both the repacking of the downloaded package and the updating of the new source tree.

Change default to --no-download and --skip-signature.

When the objective of running uscan is to gather the upstream package status under the security conscious environment, please make sure to use this option.

--report-status

This is equivalent of setting "--verbose --safe".

--download-version version

Specify the version which the upstream release must match in order to be considered, rather than using the release with the highest version. (a best effort feature)

--download-debversion version

Specify the Debian package version to download the corresponding upstream release version. The dversionmangle and uversionmangle rules are considered. (a best effort feature)

--download-current-version

Download the currently packaged version. (a best effort feature)

--check-dirname-level N

See the below section "Directory name checking" for an explanation of this option.

--check-dirname-regex regex

See the below section "Directory name checking" for an explanation of this option.

--destdir path Normally, uscan changes its internal current directory to the package's source directory where the debian/ is located. Then the destination directory for the downloaded tarball and other files is set to the parent directory ../ from this internal current directory.

This default destination directory can be overridden by setting --destdir option to a particular path. If this path is a relative path, the destination directory is determined in relative to the internal current directory of uscan execution. If this path is a absolute path, the destination directory is set to path irrespective of the internal current directory of uscan execution.

The above is true not only for the simple uscan run in the single source tree but also for the advanced scanning uscan run with subdirectories holding multiple source trees.

One exception is when --watchfile and --package are used together. For this case, the internal current directory of uscan execution and the default destination directory are set to the current directory . where uscan is started. The default destination directory can be overridden by setting --destdir option as well.

--package package

Specify the name of the package to check for rather than examining debian/changelog; this requires the --upstream-version (unless a version is specified in the watch file) and --watchfile options as well. Furthermore, no directory scanning will be done and nothing will be downloaded. This option automatically sets --no-download and --skip-signature; and probably most useful in conjunction with the DEHS system (and --dehs).

--upstream-version upstream-version

Specify the current upstream version rather than examine debian/watch or debian/changelog to determine it. This is ignored if a directory scan is being performed and more than one debian/watch file is found.

--watchfile watchfile

Specify the watchfile rather than perform a directory scan to determine it. If this option is used without --package, then uscan must be called from within the Debian package source tree (so that debian/changelog can be found simply by stepping up through the tree).

One exception is when --watchfile and --package are used together. uscan can be called from anywhare and the internal current directory of uscan execution and the default destination directory are set to the current directory . where uscan is started.

See more in the --destdir explanation.

--bare

Disable all site specific special case codes to perform URL redirections and page content alterations.

--http-header

Add specified header in HTTP requests for matching url. This option can be used more than one time, values must be in the form "baseUrl@Name=value. Example:

  uscan --http-header https://example.org@My-Token=qwertyuiop
    

Security:

--no-exclusion

Don't automatically exclude files mentioned in debian/copyright field Files-Excluded.

--pasv

Force PASV mode for FTP connections.

--no-pasv

Don't use PASV mode for FTP connections.

--no-symlink

Don't rename nor repack upstream tarball.

--timeout N

Set timeout to N seconds (default 20 seconds).

--user-agent, --useragent

Override the default user agent header.

--help

Give brief usage information.

--version

Display version information.

uscan also accepts following options and passes them to mk-origtargz:

--symlink

Make orig.tar.gz (with the appropriate extension) symlink to the downloaded files. (This is the default behavior.)

--copy

Instead of symlinking as described above, copy the downloaded files.

--rename

Instead of symlinking as described above, rename the downloaded files.

--repack

After having downloaded an lzma tar, xz tar, bzip tar, gz tar, zip, jar, xpi, zstd archive, repack it to the specified compression (see --compression).

The unzip package must be installed in order to repack zip and jar archives, the mozilla-devscripts package must be installed to repack xpi archives, the xz-utils package must be installed to repack lzma or xz tar archives, and zstd must be installed to repack zstd archives.

--compression [ gzip | bzip2 | lzma | xz ]

In the case where the upstream sources are repacked (either because --repack option is given or debian/copyright contains the field Files-Excluded), it is possible to control the compression method via the parameter. The default is gzip for normal tarballs, and xz for tarballs generated directly from the git repository.

--copyright-file copyright-file

Exclude files mentioned in Files-Excluded in the given copyright-file. This is useful when running uscan not within a source package directory.

DEVSCRIPT CONFIGURATION VARIABLES¶

For the basic usage, uscan does not require to set these configuration variables.

The two configuration files /etc/devscripts.conf and ~/.devscripts are sourced by a shell in that order to set configuration variables. These may be overridden by command line options. Environment variable settings are ignored for this purpose. If the first command line option given is --noconf, then these files will not be read. The currently recognized variables are:

USCAN_DOWNLOAD

Download or report only:

USCAN_SAFE

If this is set to yes, then uscan avoids running unsafe scripts by skipping both the repacking of the downloaded package and the updating of the new source tree; this is equivalent to the --safe options; this also sets the default to --no-download and --skip-signature.

USCAN_PASV

If this is set to yes or no, this will force FTP connections to use PASV mode or not to, respectively. If this is set to default, then Net::FTP(3) makes the choice (primarily based on the FTP_PASSIVE environment variable).

USCAN_TIMEOUT

If set to a number N, then set the timeout to N seconds. This is equivalent to the --timeout option.

USCAN_SYMLINK

If this is set to no, then a pkg_version.orig.tar.{gz|bz2|lzma|xz} symlink will not be made (equivalent to the --no-symlink option). If it is set to yes or symlink, then the symlinks will be made. If it is set to rename, then the files are renamed (equivalent to the --rename option).

USCAN_DEHS_OUTPUT

If this is set to yes, then DEHS-style output will be used. This is equivalent to the --dehs option.

USCAN_VERBOSE

If this is set to yes, then verbose output will be given. This is equivalent to the --verbose option.

USCAN_USER_AGENT

If set, the specified user agent string will be used in place of the default. This is equivalent to the --user-agent option.

USCAN_DESTDIR

If set, the downloaded files will be placed in this directory. This is equivalent to the --destdir option.

USCAN_REPACK

If this is set to yes, then after having downloaded a bzip tar, lzma tar, xz tar, zip or zstd archive, uscan will repack it to the specified compression (see --compression). This is equivalent to the --repack option.

USCAN_EXCLUSION

If this is set to no, files mentioned in the field Files-Excluded of debian/copyright will be ignored and no exclusion of files will be tried. This is equivalent to the --no-exclusion option.

USCAN_HTTP_HEADER

If set, the specified http header will be used if URL match. This is equivalent to --http-header option.

EXIT STATUS¶

The exit status gives some indication of whether a newer version was found or not; one is advised to read the output to determine exactly what happened and whether there were any warnings to be noted.

0

Either --help or --version was used, or for some watch file which was examined, a newer upstream version was located.

1

No newer upstream versions were located for any of the watch files examined.

ADVANCED FEATURES¶

uscan has many other enhanced features which are skipped in the above section for the simplicity. Let's check their highlights.

uscan can be executed with path as its argument to change the starting directory of search from the current directory to path .

If you are not sure what exactly is happening behind the scene, please enable the --verbose option. If this is not enough, enable the --debug option too see all the internal activities.

See "COMMANDLINE OPTIONS" and "DEVSCRIPT CONFIGURATION VARIABLES" for other variations.

HISTORY AND UPGRADING¶

This section briefly describes the backwards-incompatible watch file features which have been added in each watch file version, and the first version of the devscripts package which understood them.

Pre-version 2

The watch file syntax was significantly different in those days. Don't use it. If you are upgrading from a pre-version 2 watch file, you are advised to read this manpage and to start from scratch.

Version 2

devscripts version 2.6.90: The first incarnation of the current style of watch files. This version is also deprecated and will be rejected after the Debian 11 release.

Version 3

devscripts version 2.8.12: Introduced the following: correct handling of regex special characters in the path part, directory/path pattern matching, version number in several parts, version number mangling. Later versions have also introduced URL mangling.

If you are upgrading from version 2, the key incompatibility is if you have multiple groups in the pattern part; whereas only the first one would be used in version 2, they will all be used in version 3. To avoid this behavior, change the non-version-number groups to be (?: ... ) instead of a plain ( ... ) group.

Version 4

devscripts version 2.15.10: The first incarnation of watch files supporting multiple upstream tarballs.

The syntax of the watch file is relaxed to allow more spaces for readability.

If you have a custom script in place of uupdate, you may also encounter problems updating from Version 3.

SEE ALSO¶

dpkg(1), mk-origtargz(1), perlre(1), uupdate(1), devscripts.conf(5)

AUTHOR¶

The original version of uscan was written by Christoph Lameter <clameter@debian.org>. Significant improvements, changes and bugfixes were made by Julian Gilbey <jdg@debian.org>. HTTP support was added by Piotr Roszatycki <dexter@debian.org>. The program was rewritten in Perl by Julian Gilbey. Xavier Guimard converted it in object-oriented Perl using Moo.