latexgit (18mar20)

git-svn-id: svn://tug.org/texlive/trunk@54391 c570f23f-e606-0410-a88d-b1316a301751

3 files changed, 180 insertions, 148 deletions

diff --git a/Master/texmf-dist/doc/latex/latexgit/latexgit.pdf b/Master/texmf-dist/doc/latex/latexgit/latexgit.pdf
index 5ddb54d5672..a6dd138f0cd 100644
--- a/Master/texmf-dist/doc/latex/latexgit/latexgit.pdf
+++ b/Master/texmf-dist/doc/latex/latexgit/latexgit.pdf
diff --git a/Master/texmf-dist/source/latex/latexgit/latexgit.dtx b/Master/texmf-dist/source/latex/latexgit/latexgit.dtx
index df840b5e1f7..100d1d16a8d 100644
--- a/Master/texmf-dist/source/latex/latexgit/latexgit.dtx
+++ b/Master/texmf-dist/source/latex/latexgit/latexgit.dtx
@@ -58,6 +58,7 @@ Licensed under GPL v3.
 \usepackage{enumitem}
 \usepackage{verbatim}
 \usepackage{amssymb}
+\usepackage{xstring}
 \EnableCrossrefs
 \CodelineIndex
 \RecordChanges
@@ -112,6 +113,7 @@ Licensed under GPL v3.
 %\gitchanges
 %
 %\DoNotIndex{\def,\edef,\expandafter,\global,\let,\newcommand,\relax,\catcode}
+%\DoNotIndex{\%,\&} % this does not work currently due to a known bug
 %\DoNotIndex{\begingroup,\endgroup}
 %\expandafter\DoNotIndex\expandafter{\string\^}
 %\DoNotIndex{\hbox,\ifdim,\setbox,\wd}
@@ -121,6 +123,7 @@ Licensed under GPL v3.
 %\DoNotIndex{\space,\unskip}
 %\DoNotIndex{\LaTeX,\pgfkeys,\changes}
 %\DoNotIndex{\formatdate,\formattime}
+%\DoNotIndex{\StrSubstitute}
 %\DoNotIndex{\git@@revision,\git@@thisdate,\git@@thishash,\git@@thismsg,\git@@parent}
 %
 %\begin{abstract}
@@ -188,6 +191,8 @@ Licensed under GPL v3.
 %    Use the git repository in directory \verb$DIR$ (or its first parent
 %    directory that is a git repository). \latexgit{} will \bashcmd{cd} to this
 %    directory before executing the actual \git{} command.
+%  \item[file=FILE]
+%    Get the information for the last commit modifying \verb$FILE$.
 %  \item[formatDate]
 %    Format dates using \textsf{datetime}'s \cs{formatdate}.
 %  \item[formatTime]
@@ -235,7 +240,7 @@ Licensed under GPL v3.
 %    \end{comment}
 %    \begin{macrocode}
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{latexgit}[2016/08/24]
+\ProvidesPackage{latexgit}[2020/03/18]
 
 \RequirePackage{pgfkeys}
 \RequirePackage{datetime}
@@ -271,6 +276,7 @@ Licensed under GPL v3.
   /git/.is family, /git,
   default/.style={
     directory=.,
+    file=,
     formatDate=false,
     formatInterDateTime=\space{}at\space{},
     formatTime=false,
@@ -279,6 +285,7 @@ Licensed under GPL v3.
     shortHash=true,
   },
   directory/.estore in=\git@opt@Directory,
+  file/.estore in=\git@opt@File,
   formatDate/.is if=git@opt@FormatDate,
   formatInterDateTime/.estore in=\git@opt@FormatInterDateTime,
   formatTime/.is if=git@opt@FormatTime,
@@ -312,12 +319,26 @@ Licensed under GPL v3.
 %    \end{macrocode}
 %\end{macro}
 %
+%In what follows, \verb$%$ may be used in calls to \git{}. Therefore we use
+%\verb$&$ as comment character.
+%    \begin{macrocode}
+\catcode`\&=14\catcode`\%=11
+%    \end{macrocode}
+%
+%\begin{macro}{\git@space}
+%    For internal use, when a space is required after a \texttt{csname} in a
+%    call to \cs{git@command}.
+%    \begin{macrocode}
+\def\git@space{ }
+%    \end{macrocode}
+%\end{macro}
+%
 %\begin{macro}{\gitcommithash}
 %    Get a commit hash.
 %    \gitoptions{directory,revision,shortHash}
 %
 %    \begin{macrocode}
-\newcommand{\gitcommithash}[1][]{%
+\newcommand{\gitcommithash}[1][]{&
   \git@commithash[#1]\git@result}
 %    \end{macrocode}
 %\end{macro}
@@ -325,15 +346,15 @@ Licensed under GPL v3.
 %\begin{macro}{\git@commithash}
 %    Like \cs{gitcommithash}, but does not return the output.
 %    \begin{macrocode}
-\newcommand{\git@commithash}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \ifgit@opt@ShortHash%
-    \git@command{git log -n 1 --oneline \git@opt@Revision
-      | cut -d' ' -f1}%
-  \else%
-    \git@command{git log -n 1 \git@opt@Revision
-      | head -1 | cut -d' ' -f2}%
-  \fi%
+\newcommand{\git@commithash}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \ifgit@opt@ShortHash&
+    \git@command{git log -n 1 --format=%h
+      \git@opt@Revision\git@space -- \git@opt@File}&
+  \else&
+    \git@command{git log -n 1 --format=%H
+      \git@opt@Revision\git@space -- \git@opt@File}&
+  \fi&
 }
 %    \end{macrocode}
 %\end{macro}
@@ -343,7 +364,7 @@ Licensed under GPL v3.
 %    \gitoptions{directory,revision}
 %
 %    \begin{macrocode}
-\newcommand{\gitcommitmsg}[1][]{%
+\newcommand{\gitcommitmsg}[1][]{&
   \git@commitmsg[#1]\git@result}
 %    \end{macrocode}
 %\end{macro}
@@ -351,10 +372,10 @@ Licensed under GPL v3.
 %\begin{macro}{\git@commitmsg}
 %    Like \cs{gitcommitmsg}, but does not return the output.
 %    \begin{macrocode}
-\newcommand{\git@commitmsg}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 --oneline \git@opt@Revision
-    | cut -d' ' -f2-}%
+\newcommand{\git@commitmsg}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format=%B
+    \git@opt@Revision\git@space -- \git@opt@File}&
 }
 %    \end{macrocode}
 %\end{macro}
@@ -363,8 +384,8 @@ Licensed under GPL v3.
 %    Format a commit date in ISO format using \textsf{datetime}'s
 %    \cs{formatdate}.
 %    \begin{macrocode}
-\def\git@formatCommitDate#1-#2-#3 #4:#5:#6 +#7\relax{%
-  \formatdate{#3}{#2}{#1}%
+\def\git@formatCommitDate#1-#2-#3 #4:#5:#6 +#7\relax{&
+  \formatdate{#3}{#2}{#1}&
 }
 %    \end{macrocode}
 %\end{macro}
@@ -373,11 +394,11 @@ Licensed under GPL v3.
 %    Format a commit time using \textsf{datetime}'s \cs{formattime}.
 %    \gitoptions{showTimeZone}
 %    \begin{macrocode}
-\def\git@formatCommitTime#1-#2-#3 #4:#5:#6 +#7\relax{%
-  \formattime{#4}{#5}{#6}%
-  \ifgit@opt@ShowTimeZone%
-    \space(+#7\unskip)%
-  \fi%
+\def\git@formatCommitTime#1-#2-#3 #4:#5:#6 +#7\relax{&
+  \formattime{#4}{#5}{#6}&
+  \ifgit@opt@ShowTimeZone&
+    \space(+#7\unskip)&
+  \fi&
 }
 %    \end{macrocode}
 %\end{macro}
@@ -389,19 +410,19 @@ Licensed under GPL v3.
 %    \gitoptions{directory,formatDate,formatTime,revision,showTimeZone}
 %
 %    \begin{macrocode}
-\newcommand{\gitcommitdate}[1][]{%
-  \git@commitdate[#1]%
-  \ifgit@opt@FormatDate%
-    \expandafter\git@formatCommitDate\git@rawresult\relax%
-    \ifgit@opt@FormatTime%
-      \git@opt@FormatInterDateTime%
-      \expandafter\git@formatCommitTime\git@rawresult\relax%
+\newcommand{\gitcommitdate}[1][]{&
+  \git@commitdate[#1]&
+  \ifgit@opt@FormatDate&
+    \expandafter\git@formatCommitDate\git@rawresult\relax&
+    \ifgit@opt@FormatTime&
+      \git@opt@FormatInterDateTime&
+      \expandafter\git@formatCommitTime\git@rawresult\relax&
     \fi
-  \else\ifgit@opt@FormatTime%
-    \expandafter\git@formatCommitTime\git@rawresult\relax%
+  \else\ifgit@opt@FormatTime&
+    \expandafter\git@formatCommitTime\git@rawresult\relax&
   \else
-    \git@result%
-  \fi\fi%
+    \git@result&
+  \fi\fi&
 }
 %    \end{macrocode}
 %\end{macro}
@@ -409,10 +430,10 @@ Licensed under GPL v3.
 %\begin{macro}{\git@commitdate}
 %    Like \cs{gitcommitdate}, but does not return the output.
 %    \begin{macrocode}
-\newcommand{\git@commitdate}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 --date=iso \git@opt@Revision
-    | grep Date | head -1 | cut -d' ' -f2-}%
+\newcommand{\git@commitdate}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format=%ai
+    \git@opt@Revision\git@space -- \git@opt@File}&
 }
 %    \end{macrocode}
 %\end{macro}
@@ -422,7 +443,7 @@ Licensed under GPL v3.
 %    \gitoptions{directory,revision}
 %
 %    \begin{macrocode}
-\newcommand{\gitcommitauthor}[1][]{%
+\newcommand{\gitcommitauthor}[1][]{&
   \git@commitauthor[#1]\git@result}
 %    \end{macrocode}
 %\end{macro}
@@ -430,10 +451,10 @@ Licensed under GPL v3.
 %\begin{macro}{\git@commitauthor}
 %    Like \cs{gitcommitauthor}, but does not return the output.
 %    \begin{macrocode}
-\newcommand{\git@commitauthor}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 \git@opt@Revision
-    | grep Author | head -1 | cut -d' ' -f2-}%
+\newcommand{\git@commitauthor}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format='%an <%ae>'
+    \git@opt@Revision\git@space -- \git@opt@File}&
 }
 %    \end{macrocode}
 %\end{macro}
@@ -443,7 +464,7 @@ Licensed under GPL v3.
 %    \gitoptions{directory,revision}
 %
 %    \begin{macrocode}
-\newcommand{\gitcommitauthorname}[1][]{%
+\newcommand{\gitcommitauthorname}[1][]{&
   \git@commitauthorname[#1]\git@result}
 %    \end{macrocode}
 %\end{macro}
@@ -451,10 +472,10 @@ Licensed under GPL v3.
 %\begin{macro}{\git@commitauthorname}
 %    Like \cs{gitcommitauthorname}, but does not return the output.
 %    \begin{macrocode}
-\newcommand{\git@commitauthorname}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 \git@opt@Revision
-    | grep Author | head -1 | cut -d' ' -f2- | cut -d'<' -f1}%
+\newcommand{\git@commitauthorname}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format=%an
+    \git@opt@Revision\git@space -- \git@opt@File}&
 }
 %    \end{macrocode}
 %\end{macro}
@@ -464,7 +485,7 @@ Licensed under GPL v3.
 %    \gitoptions{directory,revision}
 %
 %    \begin{macrocode}
-\newcommand{\gitcommitauthoremail}[1][]{%
+\newcommand{\gitcommitauthoremail}[1][]{&
   \git@commitauthoremail[#1]\git@result}
 %    \end{macrocode}
 %\end{macro}
@@ -472,11 +493,10 @@ Licensed under GPL v3.
 %\begin{macro}{\git@commitauthoremail}
 %    Like \cs{gitcommitauthoremail}, but does not return the output.
 %    \begin{macrocode}
-\newcommand{\git@commitauthoremail}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 \git@opt@Revision
-    | grep Author | head -1 | cut -d' ' -f2-
-    | cut -d'<' -f2 | cut -d'>' -f1}%
+\newcommand{\git@commitauthoremail}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format=%ae
+    \git@opt@Revision\git@space -- \git@opt@File}&
 }
 %    \end{macrocode}
 %\end{macro}
@@ -484,10 +504,11 @@ Licensed under GPL v3.
 %\begin{macro}{\git@commitparent}
 %    Get the hash of the first parent.
 %    \begin{macrocode}
-\newcommand{\git@commitparent}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 --pretty=raw \git@opt@Revision
-    | grep parent | head -1 | cut -d' ' -f2}%
+\newcommand{\git@commitparent}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format=%p
+    \git@opt@Revision\git@space -- \git@opt@File
+    | cut -d' ' -f2}&
 }
 %    \end{macrocode}
 %\end{macro}
@@ -496,7 +517,7 @@ Licensed under GPL v3.
 %    Record the full \git{} commit history (following first parents using
 %    \cs{git@commitparent}) using \cs{changes}.
 %    \begin{macrocode}
-\newcommand{\gitchanges}[1][]{%
+\newcommand{\gitchanges}[1][]{&
   \git@changes[#1]{HEAD}
 }
 %    \end{macrocode}
@@ -505,26 +526,31 @@ Licensed under GPL v3.
 %\begin{macro}{\git@changes}
 %    Like \cs{gitchanges}, but accepts an extra argument for the revision.
 %    \begin{macrocode}
-\newcommand{\git@changes}[2][]{%
-  \edef\git@@revision{#2}%
-  \git@commithash[revision=\git@@revision]%
-  \edef\git@@thishash{\git@rawresult}%
-  \git@command{git log -n 1 --date=iso \git@@revision
-    | grep Date | head -1 | cut -d' ' -f4}%
-  \edef\git@@thisdate{\git@rawresult}%
-  \git@commitmsg[revision=\git@@revision]%
-  \edef\git@@thismsg{\git@rawresult}%
-  \changes{\git@@thisdate\unskip: \git@@thishash}\git@@thisdate\git@@thismsg%
-  \git@commitparent[revision=\git@@revision]%
-  \let\git@@parent\git@rawresult%
+\newcommand{\git@changes}[2][]{&
+  \edef\git@@revision{#2}&
+  \git@commithash[revision=\git@@revision]&
+  \edef\git@@thishash{\git@rawresult}&
+  \git@command{git log -n 1 --format=%ad --date=short \git@opt@Revision}&
+  \edef\git@@thisdate{\git@rawresult}&
+  \git@commitmsg[revision=\git@@revision]&
+  & TODO: this removes '=' characters because they break \changes, but the real
+  & solution would be to put something back that restores these characters.
+  \StrSubstitute[0]{\git@rawresult}{=}{}[\git@@thismsg]&
+  \changes{\git@@thisdate\unskip: \git@@thishash}{\git@@thisdate}{\git@@thismsg}&
+  \git@commitparent[revision=\git@@revision]&
+  \let\git@@parent\git@rawresult&
   \setbox0=\hbox{\git@@parent\unskip}\ifdim\wd0=0pt
-  \else%
-    \git@changes{\git@@parent}%
-  \fi%
+  \else&
+    \git@changes{\git@@parent}&
+  \fi&
 }
 %    \end{macrocode}
 %\end{macro}
 %
+%Reset the catcodes for \verb$%$ and \verb$&$:
+%    \begin{macrocode}
+\catcode`\&=4\catcode`\%=14
+%    \end{macrocode}
 %
 %    \begin{comment}
 %</package>
diff --git a/Master/texmf-dist/tex/latex/latexgit/latexgit.sty b/Master/texmf-dist/tex/latex/latexgit/latexgit.sty
index e6fd11b02fb..f89079ab67e 100644
--- a/Master/texmf-dist/tex/latex/latexgit/latexgit.sty
+++ b/Master/texmf-dist/tex/latex/latexgit/latexgit.sty
@@ -8,7 +8,7 @@
 %% latexgit
 %% Author: Camil Staps <info@camilstaps.nl>
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{latexgit}[2016/08/24]
+\ProvidesPackage{latexgit}[2020/03/18]
 
 \RequirePackage{pgfkeys}
 \RequirePackage{datetime}
@@ -22,6 +22,7 @@
   /git/.is family, /git,
   default/.style={
     directory=.,
+    file=,
     formatDate=false,
     formatInterDateTime=\space{}at\space{},
     formatTime=false,
@@ -30,6 +31,7 @@
     shortHash=true,
   },
   directory/.estore in=\git@opt@Directory,
+  file/.estore in=\git@opt@File,
   formatDate/.is if=git@opt@FormatDate,
   formatInterDateTime/.estore in=\git@opt@FormatInterDateTime,
   formatTime/.is if=git@opt@FormatTime,
@@ -54,100 +56,104 @@
     \endgroup%
   \fi%
 }
-\newcommand{\gitcommithash}[1][]{%
+\catcode`\&=14\catcode`\%=11
+\def\git@space{ }
+\newcommand{\gitcommithash}[1][]{&
   \git@commithash[#1]\git@result}
-\newcommand{\git@commithash}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \ifgit@opt@ShortHash%
-    \git@command{git log -n 1 --oneline \git@opt@Revision
-      | cut -d' ' -f1}%
-  \else%
-    \git@command{git log -n 1 \git@opt@Revision
-      | head -1 | cut -d' ' -f2}%
-  \fi%
+\newcommand{\git@commithash}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \ifgit@opt@ShortHash&
+    \git@command{git log -n 1 --format=%h
+      \git@opt@Revision\git@space -- \git@opt@File}&
+  \else&
+    \git@command{git log -n 1 --format=%H
+      \git@opt@Revision\git@space -- \git@opt@File}&
+  \fi&
 }
-\newcommand{\gitcommitmsg}[1][]{%
+\newcommand{\gitcommitmsg}[1][]{&
   \git@commitmsg[#1]\git@result}
-\newcommand{\git@commitmsg}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 --oneline \git@opt@Revision
-    | cut -d' ' -f2-}%
+\newcommand{\git@commitmsg}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format=%B
+    \git@opt@Revision\git@space -- \git@opt@File}&
 }
-\def\git@formatCommitDate#1-#2-#3 #4:#5:#6 +#7\relax{%
-  \formatdate{#3}{#2}{#1}%
+\def\git@formatCommitDate#1-#2-#3 #4:#5:#6 +#7\relax{&
+  \formatdate{#3}{#2}{#1}&
 }
-\def\git@formatCommitTime#1-#2-#3 #4:#5:#6 +#7\relax{%
-  \formattime{#4}{#5}{#6}%
-  \ifgit@opt@ShowTimeZone%
-    \space(+#7\unskip)%
-  \fi%
+\def\git@formatCommitTime#1-#2-#3 #4:#5:#6 +#7\relax{&
+  \formattime{#4}{#5}{#6}&
+  \ifgit@opt@ShowTimeZone&
+    \space(+#7\unskip)&
+  \fi&
 }
-\newcommand{\gitcommitdate}[1][]{%
-  \git@commitdate[#1]%
-  \ifgit@opt@FormatDate%
-    \expandafter\git@formatCommitDate\git@rawresult\relax%
-    \ifgit@opt@FormatTime%
-      \git@opt@FormatInterDateTime%
-      \expandafter\git@formatCommitTime\git@rawresult\relax%
+\newcommand{\gitcommitdate}[1][]{&
+  \git@commitdate[#1]&
+  \ifgit@opt@FormatDate&
+    \expandafter\git@formatCommitDate\git@rawresult\relax&
+    \ifgit@opt@FormatTime&
+      \git@opt@FormatInterDateTime&
+      \expandafter\git@formatCommitTime\git@rawresult\relax&
     \fi
-  \else\ifgit@opt@FormatTime%
-    \expandafter\git@formatCommitTime\git@rawresult\relax%
+  \else\ifgit@opt@FormatTime&
+    \expandafter\git@formatCommitTime\git@rawresult\relax&
   \else
-    \git@result%
-  \fi\fi%
+    \git@result&
+  \fi\fi&
 }
-\newcommand{\git@commitdate}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 --date=iso \git@opt@Revision
-    | grep Date | head -1 | cut -d' ' -f2-}%
+\newcommand{\git@commitdate}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format=%ai
+    \git@opt@Revision\git@space -- \git@opt@File}&
 }
-\newcommand{\gitcommitauthor}[1][]{%
+\newcommand{\gitcommitauthor}[1][]{&
   \git@commitauthor[#1]\git@result}
-\newcommand{\git@commitauthor}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 \git@opt@Revision
-    | grep Author | head -1 | cut -d' ' -f2-}%
+\newcommand{\git@commitauthor}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format='%an <%ae>'
+    \git@opt@Revision\git@space -- \git@opt@File}&
 }
-\newcommand{\gitcommitauthorname}[1][]{%
+\newcommand{\gitcommitauthorname}[1][]{&
   \git@commitauthorname[#1]\git@result}
-\newcommand{\git@commitauthorname}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 \git@opt@Revision
-    | grep Author | head -1 | cut -d' ' -f2- | cut -d'<' -f1}%
+\newcommand{\git@commitauthorname}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format=%an
+    \git@opt@Revision\git@space -- \git@opt@File}&
 }
-\newcommand{\gitcommitauthoremail}[1][]{%
+\newcommand{\gitcommitauthoremail}[1][]{&
   \git@commitauthoremail[#1]\git@result}
-\newcommand{\git@commitauthoremail}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 \git@opt@Revision
-    | grep Author | head -1 | cut -d' ' -f2-
-    | cut -d'<' -f2 | cut -d'>' -f1}%
+\newcommand{\git@commitauthoremail}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format=%ae
+    \git@opt@Revision\git@space -- \git@opt@File}&
 }
-\newcommand{\git@commitparent}[1][]{%
-  \pgfkeys{/git,default,#1}%
-  \git@command{git log -n 1 --pretty=raw \git@opt@Revision
-    | grep parent | head -1 | cut -d' ' -f2}%
+\newcommand{\git@commitparent}[1][]{&
+  \pgfkeys{/git,default,#1}&
+  \git@command{git log -n 1 --format=%p
+    \git@opt@Revision\git@space -- \git@opt@File
+    | cut -d' ' -f2}&
 }
-\newcommand{\gitchanges}[1][]{%
+\newcommand{\gitchanges}[1][]{&
   \git@changes[#1]{HEAD}
 }
-\newcommand{\git@changes}[2][]{%
-  \edef\git@@revision{#2}%
-  \git@commithash[revision=\git@@revision]%
-  \edef\git@@thishash{\git@rawresult}%
-  \git@command{git log -n 1 --date=iso \git@@revision
-    | grep Date | head -1 | cut -d' ' -f4}%
-  \edef\git@@thisdate{\git@rawresult}%
-  \git@commitmsg[revision=\git@@revision]%
-  \edef\git@@thismsg{\git@rawresult}%
-  \changes{\git@@thisdate\unskip: \git@@thishash}\git@@thisdate\git@@thismsg%
-  \git@commitparent[revision=\git@@revision]%
-  \let\git@@parent\git@rawresult%
+\newcommand{\git@changes}[2][]{&
+  \edef\git@@revision{#2}&
+  \git@commithash[revision=\git@@revision]&
+  \edef\git@@thishash{\git@rawresult}&
+  \git@command{git log -n 1 --format=%ad --date=short \git@opt@Revision}&
+  \edef\git@@thisdate{\git@rawresult}&
+  \git@commitmsg[revision=\git@@revision]&
+  & TODO: this removes '=' characters because they break \changes, but the real
+  & solution would be to put something back that restores these characters.
+  \StrSubstitute[0]{\git@rawresult}{=}{}[\git@@thismsg]&
+  \changes{\git@@thisdate\unskip: \git@@thishash}{\git@@thisdate}{\git@@thismsg}&
+  \git@commitparent[revision=\git@@revision]&
+  \let\git@@parent\git@rawresult&
   \setbox0=\hbox{\git@@parent\unskip}\ifdim\wd0=0pt
-  \else%
-    \git@changes{\git@@parent}%
-  \fi%
+  \else&
+    \git@changes{\git@@parent}&
+  \fi&
 }
+\catcode`\&=4\catcode`\%=14
 %% Copyright (c) 2016 Camil Staps <info@camilstaps.nl>
 %% Licensed under GPL v3.
 %%