!580 tools: add generate release notes

Merge pull request !580 from lifeng_isula/master

release_notes

+2020-07-17 lifeng release 2.0.4
+    - tools: add generate release notes
+    - !572 lxc: update lxc to 4.0.3 Merge pull request !572 from lifeng_isula/master
+    - !530 修复websocket限流可能引起卡死 Merge pull request !530 from JingWoo/master
+    - !550 build: add checkout LTS tag for third party software Merge pull request !550 from lifeng_isula/master
+    - !523 init struct before use it Merge pull request !523 from haozi007/work
+    - !519 fix create mtab bug to use lstat Merge pull request !519 from gaohuatao/ci_master
+    - !517 events: fix wrong format of exec command Merge pull request !517 from lifeng_isula/master
+    - !518 add -d/--disk param for CI Merge pull request !518 from gaohuatao/ci_master
+    - !494 CI: add testcases use host rootfs / Merge pull request !494 from lifeng_isula/master
+    - !492 Fix label-file reading bug Merge pull request !492 from JingWoo/master
+    - !485 fix bug of creating symlink for /etc/mtab when /etc symlink exists Merge pull request !485 from gaohuatao/master_mtab
+    - !489 Add Pull Request Template And Issue Template Merge pull request !489 from JingWoo/master
+    - !487 iSulad: resolve coredump of isula inspect "" Merge pull request !487 from Jackey_1024/ma_0623
+    - !467 isulad-shim: fix probabilistic bad fd Merge pull request !467 from zklei/epoll_ctl
+    - !465 Release v2.0.3 Merge pull request !465 from lifeng_isula/master
+    - !464 iSulad: change llt to ut Merge pull request !464 from Jackey_1024/0616
+
+    dev stats:
+      - 23 files changed, 221 insertions(+), 123 deletions(-)
+      - contributors: lifeng68, gaohuatao, wujing, haozi007, jikui, leizhongkai
+

update-version.bash

@@ -15,6 +15,28 @@
 #!/bin/bash
 # usage
 # ./update-version.bash
+
+function update_release_notes()
+{
+	LAST_RELEASE=$(git describe --tags --abbrev=0)
+	# Prepare proposed delease notes
+	rm -f release_notes.tmp
+	echo "$(date "+%Y-%m-%d") $USER release $1" >> release_notes.tmp
+	git log --first-parent --oneline $LAST_RELEASE.. | cut -d' ' -f 2- | sed 's/^/    - /' >> release_notes.tmp
+	echo >> release_notes.tmp
+	echo "    dev stats:" >> release_notes.tmp
+	echo "      -$(git diff --shortstat $LAST_RELEASE)" >> release_notes.tmp
+	echo -n "      - contributors: " >> release_notes.tmp
+	git shortlog -ns --no-merges $LAST_RELEASE..HEAD | cut -d$'\t' -f 2 | sed -e ':a' -e 'N' -e '$!ba' -e 's/\n/, /g' >> release_notes.tmp
+	echo "#" >> release_notes.tmp
+	echo "#" >> release_notes.tmp
+	echo "#" >> release_notes.tmp
+	echo >> release_notes.tmp
+	cat release_notes >> release_notes.tmp
+	grep -v '^#' release_notes.tmp | sed '/./,$!d' > release_notes
+	rm -rf release_notes.tmp
+}
+
 topDir=$(git rev-parse --show-toplevel)
 specfile="${topDir}/iSulad.spec"
 Cmakefile="${topDir}/CMakeLists.txt"
@@ -42,6 +64,10 @@ fi
 
 new_version=${first_old_version}.${second_old_version}.${third_old_version}
 
+if [[ ${choice} -ne "d" ]]; then
+	update_release_notes "$new_version"
+fi
+
 echo "The version number has been modified: ${old_version} => ${new_version}"
 
 old_release=$(cat ${specfile} | grep "%global" | grep "_release" | awk  {'print $3'})