git-squash: add --squash-messages to concat commit messages into one.

bin/git-squash

@@ -1,7 +1,26 @@
 #!/usr/bin/env bash
 
+SQUASH_MSG=
+for arg in "$@"; do
+    case "$arg" in
+        --squash-msg)
+            SQUASH_MSG=1
+            ;;
+        *)
+            # set the argument back
+            set -- "$@" "$arg"
+            ;;
+    esac
+
+    shift
+done
+
 src="$1"
 msg="$2"
+if [[ -n "$msg" ]] && [[ -n "$SQUASH_MSG" ]]; then
+    >&2 echo "When commit message is given, --squash-msg is not allowed."
+    exit 1
+fi
 
 is_branch() {
   git show-ref --verify --quiet "refs/heads/$src"
@@ -35,11 +54,18 @@ prompt_continuation_if_squashing_master() {
 
 squash_branch() {
   prompt_continuation_if_squashing_master
+  if [ -n "$SQUASH_MSG" ]; then
+      base=$(git merge-base "$src" @)
+      msg=$(git log "$base".."$src" --format="%s%n%n%b" --no-merges --reverse)
+  fi
   git merge --squash "$src" || exit 1  # quits if `git merge` fails
   commit_if_msg_provided
 }
 
 squash_current_branch() {
+  if [ -n "$SQUASH_MSG" ]; then
+      msg=$(git log "$src"..@ --format="%s%n%n%b" --no-merges --reverse)
+  fi
   git reset --soft "$src" || exit 1    # quits if `git reset` fails
   commit_if_msg_provided
 }

man/git-squash.1

@@ -1,13 +1,13 @@
 .\" generated with Ronn/v0.7.3
 .\" http://github.com/rtomayko/ronn/tree/0.7.3
 .
-.TH "GIT\-SQUASH" "1" "October 2017" "" "Git Extras"
+.TH "GIT\-SQUASH" "1" "November 2019" "" "Git Extras"
 .
 .SH "NAME"
 \fBgit\-squash\fR \- Import changes from a branch
 .
 .SH "SYNOPSIS"
-\fBgit\-squash\fR <source\-branch|commit ref> [<commit\-message>]
+\fBgit\-squash\fR [<\-\-squash\-messages>] <source\-branch|commit ref> [<commit\-message>]
 .
 .SH "DESCRIPTION"
 Produce the working tree and index state as if a real merge happened without the commit or merge marks\.
@@ -22,6 +22,12 @@ Branch to squash on the current branch\.
 <commit reference> A commit reference (has to be from the current branch) can also be used as the first argument\. A range of commits \fIsha\fR\.\.HEAD will be squashed\.
 .
 .P
+<\-\-squash\-msg>
+.
+.P
+Commit the squash result with the concatenated squashed committed messages\. This option can not be used together with <commit\-message>\.
+.
+.P
 <commit\-message>
 .
 .P
@@ -40,6 +46,7 @@ Squash commit \-\- not updating HEAD
 $ git commit \-m "New commit without a real merge"
 
 $ git squash HEAD~3 "Commit message"
+$ git squash \-\-squash\-msg @~3
 .
 .fi
 .

man/git-squash.html

@@ -76,7 +76,7 @@
 
 <h2 id="SYNOPSIS">SYNOPSIS</h2>
 
-<p><code>git-squash</code> &lt;source-branch|commit ref&gt; [&lt;commit-message&gt;]</p>
+<p><code>git-squash</code> [&lt;--squash-messages&gt;] &lt;source-branch|commit ref&gt; [&lt;commit-message&gt;]</p>
 
 <h2 id="DESCRIPTION">DESCRIPTION</h2>
 
@@ -93,6 +93,11 @@
   A commit reference (has to be from the current branch) can also be used as the
   first argument. A range of commits <var>sha</var>..HEAD will be squashed.</p>
 
+<p>  &lt;--squash-msg&gt;</p>
+
+<p>  Commit the squash result with the concatenated squashed committed messages.
+  This option can not be used together with &lt;commit-message&gt;.</p>
+
 <p>  &lt;commit-message&gt;</p>
 
 <p>  If commit-message is given, commit the squash result.</p>
@@ -108,11 +113,12 @@ Squash commit -- not updating HEAD
 $ git commit -m "New commit without a real merge"
 
 $ git squash HEAD~3 "Commit message"
+$ git squash --squash-msg @~3
 </code></pre>
 
 <h2 id="AUTHOR">AUTHOR</h2>
 
-<p>Written by Jesús Espino &lt;<a href="&#109;&#x61;&#x69;&#108;&#116;&#x6f;&#58;&#x6a;&#101;&#x73;&#x70;&#x69;&#110;&#111;&#x67;&#x40;&#x67;&#109;&#97;&#105;&#x6c;&#x2e;&#x63;&#x6f;&#109;" data-bare-link="true">&#x6a;&#101;&#115;&#112;&#105;&#x6e;&#111;&#x67;&#64;&#x67;&#x6d;&#97;&#x69;&#x6c;&#46;&#99;&#111;&#x6d;</a>&gt;</p>
+<p>Written by Jesús Espino &lt;<a href="&#x6d;&#97;&#105;&#x6c;&#116;&#111;&#x3a;&#106;&#101;&#115;&#112;&#105;&#110;&#111;&#x67;&#64;&#x67;&#x6d;&#x61;&#105;&#x6c;&#x2e;&#x63;&#111;&#x6d;" data-bare-link="true">&#x6a;&#x65;&#x73;&#x70;&#105;&#110;&#111;&#103;&#x40;&#103;&#x6d;&#x61;&#x69;&#x6c;&#46;&#x63;&#x6f;&#109;</a>&gt;</p>
 
 <h2 id="REPORTING-BUGS">REPORTING BUGS</h2>
 
@@ -125,7 +131,7 @@ $ git squash HEAD~3 "Commit message"
 
   <ol class='man-decor man-foot man foot'>
     <li class='tl'></li>
-    <li class='tc'>October 2017</li>
+    <li class='tc'>November 2019</li>
     <li class='tr'>git-squash(1)</li>
   </ol>
 

man/git-squash.md

@@ -3,7 +3,7 @@ git-squash(1) -- Import changes from a branch
 
 ## SYNOPSIS
 
-`git-squash` <source-branch|commit ref> [<commit-message>]
+`git-squash` [<--squash-messages>] <source-branch|commit ref> [<commit-message>]
 
 ## DESCRIPTION
 
@@ -20,6 +20,11 @@ git-squash(1) -- Import changes from a branch
   A commit reference (has to be from the current branch) can also be used as the
   first argument. A range of commits <sha>..HEAD will be squashed.
 
+  &lt;--squash-msg&gt;
+
+  Commit the squash result with the concatenated squashed committed messages.
+  This option can not be used together with &lt;commit-message&gt;.
+
   &lt;commit-message&gt;
 
   If commit-message is given, commit the squash result.
@@ -35,6 +40,7 @@ git-squash(1) -- Import changes from a branch
     $ git commit -m "New commit without a real merge"
 
     $ git squash HEAD~3 "Commit message"
+    $ git squash --squash-msg @~3
 
 ## AUTHOR