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Bug#832096: lintian: please check for common typos in debian/rules target names



Jakub Wilk wrote:

> Lintian is already aware of existing dh_* commands (see 
> data/debhelper/dh_commands), so maybe we could use this list instead of 
> manually maintaining possible misspellings?

Not without changing this data structure as we want multiple misspellings
to map to the correct spelling. A clever regex is also not suitable either
as there are some dh_ commands that *do* have an underscore as a separator.

> [..]

Well, all those typos in my patch were ironically embarrassing
given what its meant to solve. :)

Updated patch attached.


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby@debian.org / chris-lamb.co.uk
       `-
From 213ec736850d0c706264d6a482dad14f8172be89 Mon Sep 17 00:00:00 2001
From: Chris Lamb <lamby@debian.org>
Date: Fri, 22 Jul 2016 12:43:30 +0100
Subject: [PATCH] c/rules: Check for common typos in debian/rules target names.

Misspelling a target (eg. "override_dh_install_debconf") results in that
rule silently not being called. See #831772 for an example in the wild.

Signed-off-by: Chris Lamb <lamby@debian.org>
---
 checks/rules.desc                         |  7 +++++++
 checks/rules.pm                           |  4 ++++
 data/rules/target-typos                   | 31 +++++++++++++++++++++++++++++++
 t/tests/rules-general/debian/debian/rules |  2 ++
 t/tests/rules-general/desc                |  3 ++-
 t/tests/rules-general/tags                |  1 +
 6 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 data/rules/target-typos

diff --git a/checks/rules.desc b/checks/rules.desc
index 25c565b..3f4f738 100644
--- a/checks/rules.desc
+++ b/checks/rules.desc
@@ -248,3 +248,10 @@ Info: The source package does not have both a build-arch and a build-indep
  .
  Please consider adding both the build-arch and build-indep targets.
 
+Tag: typo-in-debian-rules-target
+Severity: normal
+Certainty: certain
+Info: The listed target in debian/rules command is a misspelling.
+ .
+ This can result in (for example) a <tt>dh_override_</tt>-style target
+ silently not being executed by <tt>make</tt>.
diff --git a/checks/rules.pm b/checks/rules.pm
index bd3a141..1100032 100644
--- a/checks/rules.pm
+++ b/checks/rules.pm
@@ -38,6 +38,7 @@ our $ANYPYTHON_DEPEND
 my $KNOWN_MAKEFILES = Lintian::Data->new('rules/known-makefiles', '\|\|');
 my $DEPRECATED_MAKEFILES = Lintian::Data->new('rules/deprecated-makefiles');
 my $POLICYRULES = Lintian::Data->new('rules/policy-rules', qr/\s++/);
+my $TARGETTYPOS = Lintian::Data->new('rules/target-typos', qr/\s++/);
 
 # forbidden construct in rules
 my $BAD_CONSTRUCT_IN_RULES
@@ -313,6 +314,9 @@ sub run {
                 if (any { $target =~ /$_/ } @arch_rules) {
                     push(@arch_rules, @depends);
                 }
+                tag 'typo-in-debian-rules-target', $target, '->',
+                        $TARGETTYPOS->value($target), "(line $.)"
+                    if ($TARGETTYPOS->known($target));
             }
             undef %debhelper_group;
         } elsif (/^define /) {
diff --git a/data/rules/target-typos b/data/rules/target-typos
new file mode 100644
index 0000000..e7da585
--- /dev/null
+++ b/data/rules/target-typos
@@ -0,0 +1,31 @@
+# a list of common incorrect targets in debian/rules
+# format is
+#   <typo> <suggestion>
+#
+override_dh_autotest			override_dh_auto_test
+override_dh_install_catalogs		override_dh_installcatalogs
+override_dh_install_changelog		override_dh_installchangelogs
+override_dh_install_cron		override_dh_installcron
+override_dh_install_deb			override_dh_installdeb
+override_dh_install_debconf		override_dh_installdebconf
+override_dh_install_dirs		override_dh_installdirs
+override_dh_install_docs		override_dh_installdocs
+override_dh_install_emacsen		override_dh_installemacsen
+override_dh_install_example		override_dh_installexamples
+override_dh_install_examples		override_dh_installexamples
+override_dh_install_info		override_dh_installinfo
+override_dh_install_init		override_dh_installinit
+override_dh_install_logcheck		override_dh_installlogcheck
+override_dh_install_logrotate		override_dh_installlogrotate
+override_dh_install_man			override_dh_installman
+override_dh_install_manpage		override_dh_installmanpages
+override_dh_install_manpages		override_dh_installmanpages
+override_dh_install_mans		override_dh_installman
+override_dh_install_menu		override_dh_installmenu
+override_dh_install_mime		override_dh_installmime
+override_dh_install_modules		override_dh_installmodules
+override_dh_install_pam			override_dh_installpam
+override_dh_install_udev		override_dh_installudev
+override_dh_install_xmlcatalogs		override_dh_installxmlcatalogs
+override_dh_installmanpage		override_dh_installman
+override_dh_usr_local			override_dh_usrlocal
diff --git a/t/tests/rules-general/debian/debian/rules b/t/tests/rules-general/debian/debian/rules
index cddbc03..2febda6 100755
--- a/t/tests/rules-general/debian/debian/rules
+++ b/t/tests/rules-general/debian/debian/rules
@@ -9,3 +9,5 @@ clean:
 	dh_clean
 	echo $(DEB_BUILD_OPTS) $(PWD)
 	@echo $(_)
+
+override_dh_install_examples:
diff --git a/t/tests/rules-general/desc b/t/tests/rules-general/desc
index 1f41c20..5ca2b82 100644
--- a/t/tests/rules-general/desc
+++ b/t/tests/rules-general/desc
@@ -7,4 +7,5 @@ Test-For:
  debian-rules-should-not-automatically-update-control
  debian-rules-should-not-use-DEB_BUILD_OPTS
  debian-rules-should-not-use-pwd
- debian-rules-should-not-use-underscore-variable
\ No newline at end of file
+ debian-rules-should-not-use-underscore-variable
+ typo-in-debian-rules-target
diff --git a/t/tests/rules-general/tags b/t/tests/rules-general/tags
index 3e7351b..4dc0775 100644
--- a/t/tests/rules-general/tags
+++ b/t/tests/rules-general/tags
@@ -3,3 +3,4 @@ E: rules-general source: debian-rules-should-not-automatically-update-control li
 W: rules-general source: debian-rules-should-not-use-DEB_BUILD_OPTS line 10
 W: rules-general source: debian-rules-should-not-use-pwd line 10
 W: rules-general source: debian-rules-should-not-use-underscore-variable line 11
+W: rules-general source: typo-in-debian-rules-target override_dh_install_examples -> override_dh_installexamples (line 13)
-- 
2.8.1


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