GNU bug report logs - #25585
25.1; shell-script mode not providing proper support for finding variables at point

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From: Bob Hepple <bob.hepple@HIDDEN>
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--001a114dc2fc8defef05478074c8
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This patch (suggested by https://reddit.com/u/hvis) works for me ...


diff --git a/lisp/progmodes/sh-script.el b/lisp/progmodes/sh-script.el

index a0bbf55..dc296a2 100644
--- a/lisp/progmodes/sh-script.el
+++ b/lisp/progmodes/sh-script.el
@@ -483,6 +483,7 @@ sh-mode-syntax-table
    ?~ "_"
    ?, "_"
    ?= "."
+        ?/ "."
    ?\; "."
    ?| "."
    ?& "."

--001a114dc2fc8defef05478074c8
Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr">This patch (suggested by <a href=3D"https://reddit.com/u/h=
vis">https://reddit.com/u/hvis</a>) works for me ...<br><div class=3D"gmail=
_quote"><div dir=3D"ltr"><br></div>








<u class=3D"gmail_msg"></u>


 =20
 =20
 =20
 =20
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 =20

 =20

<div class=3D"m_7131272969782406528body gmail_msg" style=3D"padding:0!impor=
tant;margin:0!important;display:block!important;width:100%!important;backgr=
ound:#ffffff">
  <table width=3D"100%" border=3D"0" cellspacing=3D"0" cellpadding=3D"0" bg=
color=3D"#ffffff" class=3D"gmail_msg">
    <tbody><tr class=3D"gmail_msg">
      <td align=3D"center" valign=3D"top" class=3D"gmail_msg">
        <table width=3D"620" border=3D"0" cellspacing=3D"0" cellpadding=3D"=
0" class=3D"m_7131272969782406528mobile-shell gmail_msg">
          <tbody><tr class=3D"gmail_msg">
            <td class=3D"m_7131272969782406528img gmail_msg" style=3D"font-=
size:0pt;line-height:0pt;text-align:left" width=3D"20"><br></td><td class=
=3D"gmail_msg">
              <div class=3D"m_7131272969782406528md gmail_msg"><p class=3D"=
gmail_msg">diff --git a/lisp/progmodes/sh-script.el b/lisp/progmodes/sh-scr=
ipt.el<br></p><pre class=3D"gmail_msg"><code class=3D"gmail_msg">index a0bb=
f55..dc296a2 100644
--- a/lisp/progmodes/sh-script.el
+++ b/lisp/progmodes/sh-script.el
@@ -483,6 +483,7 @@ sh-mode-syntax-table
    ?~ &quot;_&quot;
    ?, &quot;_&quot;
    ?=3D &quot;.&quot;
+        ?/ &quot;.&quot;
    ?\; &quot;.&quot;
    ?| &quot;.&quot;
    ?&amp; &quot;.&quot;
</code></pre>
</div>

               =20
                <div style=3D"font-size:0pt;line-height:0pt;height:8px" cla=
ss=3D"gmail_msg"><br></div></td><td class=3D"m_7131272969782406528img gmail=
_msg" style=3D"font-size:0pt;line-height:0pt;text-align:left" width=3D"20">=
<br></td></tr></tbody></table></td></tr></tbody></table>
</div>

</div></div>

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Subject: 25.1; shell-script mode not providing proper support for finding
 variables at point
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One of the GNU Emacs maintainers eli-zaretski suggested that I post my
problem as a bug report:
https://www.reddit.com/r/emacs/comments/5qz6en/ctags_and_bash/:

'Report a bug against Shell-script Mode. It sounds like it doesn't
define proper support for finding variables at point, so xref uses a
generic facility, which is only mostly correct in this case.'

My original problem is as follows: (confirm that it also fails with emacs
-Q):

So I've now got ctags(1) to understand bash variables as well as
functions.

Now I can jump to the defining location with M-. (ref-find-definitions)-
all fine and dandy.

The only fly in the ointment is that when a bash variable is
concatenated with literal text, M-. wants to look for the entire text.
eg if I M-. on the variable in:

$foobar/bar/foo

... then it wants to search for foobar/bar/foo instead of just foobar.

It wouldn't be so bad if I could repeat-complex-command and edit the
search string but M-. doesn't appear to push the command there.

Short of re-writing all the code as "$foobar"/bar/foo is there something
I can set to fix this?

In case it's interesting, this is how I build TAGS:
DIRS=(
    dir1
    dir2
)

ctags_opts='--regex-sh=/^[ \t]*(local|export|declare)?[
\t]*([A-Za-z0-9_-]+)=/\2/v,variable,variables/'

find ${DIRS[@]} -name .svn -prune -o -print | while read F; do
    file -i "$F" | egrep -q 'shellscript|text/plain' && ctags -e
--languages=sh -a "$ctags_opts" "$F"
done



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 (symbols 48 40045 0)
 (miscs 40 3384 1255)
 (strings 32 86658 8760)
 (string-bytes 1 2653873)
 (vectors 16 61835)
 (vector-slots 8 1055224 27352)
 (floats 8 479 585)
 (intervals 56 17632 351)
 (buffers 976 59)
 (heap 1024 153739 47906))

--94eb2c0979f47871d00547592a02
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<div dir=3D"ltr"><div>One of the GNU Emacs maintainers eli-zaretski suggest=
ed that I post my<br></div><div>problem as a bug report:</div><div><a href=
=3D"https://www.reddit.com/r/emacs/comments/5qz6en/ctags_and_bash/">https:/=
/www.reddit.com/r/emacs/comments/5qz6en/ctags_and_bash/</a>:</div><div><br>=
</div><div>&#39;Report a bug against Shell-script Mode. It sounds like it d=
oesn&#39;t</div><div>define proper support for finding variables at point, =
so xref uses a</div><div>generic facility, which is only mostly correct in =
this case.&#39;</div><div><br></div><div>My original problem is as follows:=
 (confirm that it also fails with emacs -Q):</div><div><br></div><div>So I&=
#39;ve now got ctags(1) to understand bash variables as well as</div><div>f=
unctions.</div><div><br></div><div>Now I can jump to the defining location =
with M-. (ref-find-definitions)-</div><div>all fine and dandy.</div><div><b=
r></div><div>The only fly in the ointment is that when a bash variable is</=
div><div>concatenated with literal text, M-. wants to look for the entire t=
ext.</div><div>eg if I M-. on the variable in:</div><div><br></div><div>$fo=
obar/bar/foo</div><div><br></div><div>... then it wants to search for fooba=
r/bar/foo instead of just foobar.</div><div>=C2=A0</div><div>It wouldn&#39;=
t be so bad if I could repeat-complex-command and edit the</div><div>search=
 string but M-. doesn&#39;t appear to push the command there.</div><div><br=
></div><div>Short of re-writing all the code as &quot;$foobar&quot;/bar/foo=
 is there something</div><div>I can set to fix this?</div><div><br></div><d=
iv>In case it&#39;s interesting, this is how I build TAGS:</div><div>DIRS=
=3D(</div><div>=C2=A0 =C2=A0 dir1</div><div>=C2=A0 =C2=A0 dir2</div><div>)<=
/div><div><br></div><div>ctags_opts=3D&#39;--regex-sh=3D/^[ \t]*(local|expo=
rt|declare)?[ \t]*([A-Za-z0-9_-]+)=3D/\2/v,variable,variables/&#39;</div><d=
iv><br></div><div>find ${DIRS[@]} -name .svn -prune -o -print | while read =
F; do</div><div>=C2=A0 =C2=A0 file -i &quot;$F&quot; | egrep -q &#39;shells=
cript|text/plain&#39; &amp;&amp; ctags -e --languages=3Dsh -a &quot;$ctags_=
opts&quot; &quot;$F&quot;</div><div>done</div><div><br></div><div><br></div=
><div><br></div><div>In GNU Emacs 25.1.1 (x86_64-redhat-linux-gnu, GTK+ Ver=
sion 3.20.9)</div><div>=C2=A0of 2016-10-13 built on <a href=3D"http://build=
vm-05.phx2.fedoraproject.org">buildvm-05.phx2.fedoraproject.org</a></div><d=
iv>Windowing system distributor &#39;Fedora Project&#39;, version 11.0.1180=
4000</div><div>System Description:<span class=3D"Apple-tab-span" style=3D"w=
hite-space:pre">	</span>Fedora release 24 (Twenty Four)</div><div><br></div=
><div>Configured using:</div><div>=C2=A0&#39;configure --build=3Dx86_64-red=
hat-linux-gnu</div><div>=C2=A0--host=3Dx86_64-redhat-linux-gnu --program-pr=
efix=3D</div><div>=C2=A0--disable-dependency-tracking --prefix=3D/usr --exe=
c-prefix=3D/usr</div><div>=C2=A0--bindir=3D/usr/bin --sbindir=3D/usr/sbin -=
-sysconfdir=3D/etc</div><div>=C2=A0--datadir=3D/usr/share --includedir=3D/u=
sr/include --libdir=3D/usr/lib64</div><div>=C2=A0--libexecdir=3D/usr/libexe=
c --localstatedir=3D/var</div><div>=C2=A0--sharedstatedir=3D/var/lib --mand=
ir=3D/usr/share/man</div><div>=C2=A0--infodir=3D/usr/share/info --with-dbus=
 --with-gif --with-jpeg --with-png</div><div>=C2=A0--with-rsvg --with-tiff =
--with-xft --with-xpm --with-x-toolkit=3Dgtk3</div><div>=C2=A0--with-gpm=3D=
no --with-xwidgets build_alias=3Dx86_64-redhat-linux-gnu</div><div>=C2=A0ho=
st_alias=3Dx86_64-redhat-linux-gnu &#39;CFLAGS=3D-DMAIL_USE_LOCKF -O2 -g</d=
iv><div>=C2=A0-pipe -Wall -Werror=3Dformat-security -Wp,-D_FORTIFY_SOURCE=
=3D2</div><div>=C2=A0-fexceptions -fstack-protector-strong --param=3Dssp-bu=
ffer-size=3D4</div><div>=C2=A0-grecord-gcc-switches -specs=3D/usr/lib/rpm/r=
edhat/redhat-hardened-cc1</div><div>=C2=A0-m64 -mtune=3Dgeneric&#39; LDFLAG=
S=3D-Wl,-z,relro</div><div>=C2=A0PKG_CONFIG_PATH=3D:/usr/lib64/pkgconfig:/u=
sr/share/pkgconfig&#39;</div><div><br></div><div>Configured features:</div>=
<div>XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GCONF GSETTINGS NOTI=
FY</div><div>ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLI=
B</div><div>TOOLKIT_SCROLL_BARS GTK3 X11 XWIDGETS</div><div><br></div><div>=
Important settings:</div><div>=C2=A0 value of $LC_ALL: en_AU.utf8</div><div=
>=C2=A0 value of $LANG: C</div><div>=C2=A0 locale-coding-system: utf-8-unix=
</div><div><br></div><div>Major mode: Help</div><div><br></div><div>Minor m=
odes in effect:</div><div>=C2=A0 global-flycheck-mode: t</div><div>=C2=A0 h=
elm-mode: t</div><div>=C2=A0 shell-dirtrack-mode: t</div><div>=C2=A0 async-=
bytecomp-package-mode: t</div><div>=C2=A0 diff-auto-refine-mode: t</div><di=
v>=C2=A0 delete-selection-mode: t</div><div>=C2=A0 show-paren-mode: t</div>=
<div>=C2=A0 recentf-mode: t</div><div>=C2=A0 tooltip-mode: t</div><div>=C2=
=A0 global-eldoc-mode: t</div><div>=C2=A0 electric-indent-mode: t</div><div=
>=C2=A0 mouse-wheel-mode: t</div><div>=C2=A0 menu-bar-mode: t</div><div>=C2=
=A0 file-name-shadow-mode: t</div><div>=C2=A0 global-font-lock-mode: t</div=
><div>=C2=A0 font-lock-mode: t</div><div>=C2=A0 blink-cursor-mode: t</div><=
div>=C2=A0 auto-composition-mode: t</div><div>=C2=A0 auto-encryption-mode: =
t</div><div>=C2=A0 auto-compression-mode: t</div><div>=C2=A0 buffer-read-on=
ly: t</div><div>=C2=A0 column-number-mode: t</div><div>=C2=A0 line-number-m=
ode: t</div><div>=C2=A0 transient-mark-mode: t</div><div><br></div><div>Rec=
ent messages:</div><div>Setting up indent for shell type bash</div><div>Ind=
entation variables are now local.</div><div>Indentation setup for shell typ=
e bash</div><div>ARCH appears unused. Verify it or export it. [SC2034]</div=
><div>Setting up indent for shell type sh</div><div>Indentation variables a=
re now local.</div><div>Indentation setup for shell type sh</div><div>TARGE=
T_ARCH appears unused. Verify it or export it. [SC2034] [3 times]</div><div=
>Type C-x 4 C-o RET to restore the other window. =C2=A0</div><div>Type &quo=
t;q&quot; to restore previous buffer.</div><div><br></div><div>Load-path sh=
adows:</div><div>/usr/share/emacs/site-lisp/gnus-bonus/nnir hides /usr/shar=
e/emacs/25.1/lisp/gnus/nnir</div><div>/usr/share/emacs/site-lisp/gnus-bonus=
/nnnil hides /usr/share/emacs/25.1/lisp/gnus/nnnil</div><div>/usr/share/ema=
cs/site-lisp/gnus-bonus/spam-stat hides /usr/share/emacs/25.1/lisp/gnus/spa=
m-stat</div><div>/usr/share/emacs/site-lisp/goodies/browse-kill-ring hides =
~/.config/emacs/browse-kill-ring</div><div>/usr/share/emacs/25.1/lisp/vc/vc=
-svn hides ~/.config/emacs/vc-svn</div><div><br></div><div>Features:</div><=
div>(shadow sort mail-extr emacsbug sendmail warnings apropos jka-compr</di=
v><div>helm-command helm-elisp helm-eval edebug eieio-opt dabbrev pulse</di=
v><div>ibuf-ext ibuffer locate find-dired ido winner grep etags xref projec=
t</div><div>misearch multi-isearch vc-svn hideshow sh-script smie executabl=
e</div><div>flycheck json map find-func subr-x dash indent-tools yafolding =
hydra lv</div><div>indent-tools-indentation-of helm-mode helm-files rx imag=
e-dired tramp</div><div>tramp-compat tramp-loaddefs trampver ucs-normalize =
shell pcomplete</div><div>dired-x dired-aux ffap thingatpt helm-buffers hel=
m-elscreen helm-tags</div><div>helm-bookmark helm-adaptive helm-info bookma=
rk helm-locate helm-grep</div><div>helm-regexp helm-external helm-net brows=
e-url xml url url-proxy</div><div>url-privacy url-expand url-methods url-hi=
story url-cookie url-domsuf</div><div>url-util url-parse auth-source url-va=
rs mailcap helm-utils compile</div><div>comint ansi-color helm-help helm-ty=
pes helm-config helm-easymenu</div><div>async-bytecomp async helm helm-sour=
ce cl-seq eieio-compat eieio</div><div>eieio-core helm-multi-match helm-lib=
 finder-inf info package seq</div><div>browse-kill-ring hide-comnt psvn byt=
e-opt bytecomp byte-compile cl-extra</div><div>cconv advice derived edmacro=
 kmacro cl-macs cl gv log-edit message idna</div><div>format-spec rfc822 mm=
l mml-sec password-cache epg epg-config gnus-util</div><div>mm-decode mm-bo=
dies mm-encode mail-parse rfc2231 rfc2047 rfc2045</div><div>ietf-drums mm-u=
til help-fns help-mode mail-prsvr mailabbrev mail-utils</div><div>gmm-utils=
 mailheader ring pcvs-util add-log diff-mode pp elp ediff-merg</div><div>ed=
iff-wind ediff-diff ediff-mult ediff-help ediff-init ediff-util dired</div>=
<div>highline speedbar sb-image ezimage dframe ps-ccrypt delsel server pare=
n</div><div>recentf tree-widget wid-edit xcscope easymenu vc cl-loaddefs pc=
ase</div><div>cl-lib vc-dispatcher emacs-goodies-loaddefs easy-mmode time-d=
ate</div><div>mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks=
</div><div>lisp-float-type mwheel x-win term/common-win x-dnd tool-bar dnd =
fontset</div><div>image regexp-opt fringe tabulated-list newcomment elisp-m=
ode lisp-mode</div><div>prog-mode register page menu-bar rfn-eshadow timer =
select scroll-bar</div><div>mouse jit-lock font-lock syntax facemenu font-c=
ore frame cl-generic cham</div><div>georgian utf-8-lang misc-lang vietnames=
e tibetan thai tai-viet lao</div><div>korean japanese eucjp-ms cp51932 hebr=
ew greek romanian slovak czech</div><div>european ethiopic indian cyrillic =
chinese charscript case-table epa-hook</div><div>jka-cmpr-hook help simple =
abbrev minibuffer cl-preloaded nadvice</div><div>loaddefs button faces cus-=
face macroexp files text-properties overlay</div><div>sha1 md5 base64 forma=
t env code-pages mule custom widget</div><div>hashtable-print-readable back=
quote dbusbind inotify dynamic-setting</div><div>system-font-setting font-r=
ender-setting xwidget-internal move-toolbar</div><div>gtk x-toolkit x multi=
-tty make-network-process emacs)</div><div><br></div><div>Memory informatio=
n:</div><div>((conses 16 526407 64788)</div><div>=C2=A0(symbols 48 40045 0)=
</div><div>=C2=A0(miscs 40 3384 1255)</div><div>=C2=A0(strings 32 86658 876=
0)</div><div>=C2=A0(string-bytes 1 2653873)</div><div>=C2=A0(vectors 16 618=
35)</div><div>=C2=A0(vector-slots 8 1055224 27352)</div><div>=C2=A0(floats =
8 479 585)</div><div>=C2=A0(intervals 56 17632 351)</div><div>=C2=A0(buffer=
s 976 59)</div><div>=C2=A0(heap 1024 153739 47906))</div><div><br></div></d=
iv>

--94eb2c0979f47871d00547592a02--