Dynmically generate ~/.gitconfig

Ancient versions of 'git' would use the unix passwd identity as the
default author/committer.  This dynamically-generated ~/.gitconfig
does the same.

Might as well set excludesfile = ~/.config/git/ignore

3 files changed, 32 insertions, 14 deletions

diff --git a/Makefile b/Makefile
index 9609f9b..691e8a9 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,9 @@ DOTFILES := $(shell find dot \( -type f -o -type l \) -not -name '.*')
 
 DESTINATIONS = $(DOTFILES:dot/%=${HOME}/.%)
 
+${HOME}/.gitconfig:
+        ./src/gitconfig.sh
+
 EXECUTABLES = $(filter dot/local/bin/%, $(DOTFILES))
 
 $(HOME)/.%: dot/%
diff --git a/dot/gitconfig b/dot/gitconfig
deleted file mode 100644
index 6d9e2ed..0000000
--- a/dot/gitconfig
+++ /dev/null
@@ -1,14 +0,0 @@
-[user]
-        email = d@jerkface.net
-        name = Andrew Cady
-[sendemail]
-        from = Andrew Cady <d@jerkface.net>
-        smtpencryption = tls
-        smtpserver = smtp.gmail.com
-        smtpuser = andrew.cady@gmail.com
-        smtpserverport = 587
-        suppressfrom = yes
-[credential]
-        helper = cache
-[core]
-        excludesfile = /home/d/.config/git/ignore
diff --git a/src/gitconfig.sh b/src/gitconfig.sh
new file mode 100755
index 0000000..3a7e824
--- /dev/null
+++ b/src/gitconfig.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+target=~/.gitconfig
+if [ -z "$OVERWRITE_GITCONFIG" ] && [ -e "$target" ]
+then
+  exit
+fi
+
+user=$(id -un)                                   || exit
+[ "$user" ]                                      || exit
+email=${user}@$(hostname --fqdn)                 || exit
+[ "$email" ]                                     || exit
+name=$(getent passwd "$user" | cut -d: -f2)      || : ok
+temp=$(mktemp ~/.gitconfig.tmp.XXX)              || exit
+[ "$temp" ]                                      || exit
+
+gitconfig()
+{
+cat <<END
+[user]
+        email = ${email}
+        name = ${name:-$email}
+[core]
+        excludesfile = ~/.config/git/ignore
+END
+}
+
+gitconfig > "$temp" &&
+  mv "$temp" "$target" ||
+    rm -f "$temp"