安装mercurial
在MacOS下示例，先通过easy_install安装mercurial
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$ sudo easy_install mercurial
安装过程提示
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Searching for mercurial
Reading https://pypi.python.org/simple/mercurial/
Best match: mercurial 4.5
Downloading https://pypi.python.org/packages/d5/31/513699382639ceb525f0fd3989ba060674ed4e7b1745d5939979eb6d4d8a/mercurial-4.5.tar.gz#md5=5ca07ebb0c7f7eeb7b5a8ca9822cb8f1
Processing mercurial-4.5.tar.gz
Writing /tmp/easy_install-f5dkOr/mercurial-4.5/setup.cfg
Running mercurial-4.5/setup.py -q bdist_egg --dist-dir /tmp/easy_install-f5dkOr/mercurial-4.5/egg-dist-tmp-YDY1bx
zip_safe flag not set; analyzing archive contents...
hgdemandimport.demandimportpy2: module references __path__
hgext3rd.__init__: module references __path__
mercurial.lsprof: module references __file__
mercurial.sslutil: module references __file__
mercurial.debugcommands: module references __file__
mercurial.i18n: module references __file__
mercurial.chgserver: module MAY be using inspect.getabsfile
mercurial.extensions: module references __file__
mercurial.ui: module MAY be using inspect.getouterframes
mercurial.statprof: module references __file__
mercurial.statprof: module MAY be using inspect.getsource
mercurial.statprof: module MAY be using inspect.stack
mercurial.util: module references __file__
mercurial.cffi.mpatchbuild: module references __file__
mercurial.cffi.bdiffbuild: module references __file__
hgext.mq: module references __file__
hgext.__init__: module references __path__
creating /Library/Python/2.7/site-packages/mercurial-4.5-py2.7-macosx-10.13-intel.egg
Extracting mercurial-4.5-py2.7-macosx-10.13-intel.egg to /Library/Python/2.7/site-packages
Adding mercurial 4.5 to easy-install.pth file
Installing hg script to /usr/local/bin
Installed /Library/Python/2.7/site-packages/mercurial-4.5-py2.7-macosx-10.13-intel.egg
Processing dependencies for mercurial
Finished processing dependencies for mercurial
检查mercurial安装是否成功
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$ hg --version
Mercurial Distributed SCM (version 4.5)
(see https://mercurial-scm.org for more information)
Copyright (C) 2005-2018 Matt Mackall and others
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
克隆源
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$ hg clone http://hg.openjdk.java.net/jdk9/jdk9
destination directory: jdk9
requesting all changes
adding changesets
adding manifests
adding file changes
added 2628 changesets with 4461 changes to 468 files
new changesets cfeea66a3fa8:a08cbfc0e4ec
updating to branch default
322 files updated, 0 files merged, 0 files removed, 0 files unresolved
获取源码
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$ cd jdk9
$ bash get_source.sh
安装过程如下示意，没有提示错误即完成
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# Repositories: corba jaxp jaxws langtools jdk hotspot nashorn
corba: hg clone http://hg.openjdk.java.net/jdk9/jdk9/corba corba
jaxp: hg clone http://hg.openjdk.java.net/jdk9/jdk9/jaxp jaxp
jaxp: requesting all changes
corba: requesting all changes
jaxp: adding changesets
corba: adding changesets
corba: adding manifests
jaxp: adding manifests
corba: adding file changes
jaxp: adding file changes
corba: added 876 changesets with 5451 changes to 2597 files
corba: new changesets 55540e827aef:5666eba44ac6
corba: updating to branch default
corba: 1201 files updated, 0 files merged, 0 files removed, 0 files unresolved
jaxws: hg clone http://hg.openjdk.java.net/jdk9/jdk9/jaxws jaxws
jaxws: requesting all changes
jaxws: adding changesets
jaxws: adding manifests
jaxws: adding file changes
jaxp: added 1153 changesets with 14751 changes to 8449 files
jaxp: new changesets 6ce5f4757bde:364631d8ff2e
jaxp: updating to branch default
jaxp: 3352 files updated, 0 files merged, 0 files removed, 0 files unresolved
langtools: hg clone http://hg.openjdk.java.net/jdk9/jdk9/langtools langtools
langtools: requesting all changes
langtools: adding changesets
langtools: adding manifests
langtools: adding file changes
jaxws: added 801 changesets with 21839 changes to 10824 files
jaxws: new changesets 0961a4a21176:a1d64f45f9d5
jaxws: updating to branch default
jaxws: 3760 files updated, 0 files merged, 0 files removed, 0 files unresolved
jdk: hg clone http://hg.openjdk.java.net/jdk9/jdk9/jdk jdk
jdk: requesting all changes
jdk: adding changesets
jdk: adding manifests
langtools: added 4174 changesets with 38097 changes to 11847 files
langtools: new changesets 9a66ca7c79fa:65bfdabaab9c
langtools: updating to branch default
langtools: 9464 files updated, 0 files merged, 0 files removed, 0 files unresolved
hotspot: hg clone http://hg.openjdk.java.net/jdk9/jdk9/hotspot hotspot
hotspot: requesting all changes
hotspot: adding changesets
hotspot: adding manifests
hotspot: adding file changes
jdk: adding file changes
hotspot: added 12824 changesets with 78616 changes to 15832 files
hotspot: new changesets a61af66fc99e:b756e7a2ec33
hotspot: updating to branch default
hotspot: 9078 files updated, 0 files merged, 0 files removed, 0 files unresolved
nashorn: hg clone http://hg.openjdk.java.net/jdk9/jdk9/nashorn nashorn
nashorn: requesting all changes
nashorn: adding changesets
nashorn: adding manifests
nashorn: adding file changes
nashorn: added 1928 changesets with 14563 changes to 4181 files
nashorn: new changesets b8a1b238c77c:17cc754c8936
nashorn: updating to branch default
nashorn: 3293 files updated, 0 files merged, 0 files removed, 0 files unresolved
jdk: added 17287 changesets with 152446 changes to 50650 files
jdk: new changesets 37a05a11f281:65464a307408
jdk: updating to branch default
jdk: 27295 files updated, 0 files merged, 0 files removed, 0 files unresolved
# Repositories: . corba jaxp jaxws langtools jdk hotspot nashorn
.: cd . && hg pull -u
corba: cd corba && hg pull -u
jaxp: cd jaxp && hg pull -u
jaxws: cd jaxws && hg pull -u
langtools: cd langtools && hg pull -u
jdk: cd jdk && hg pull -u
hotspot: cd hotspot && hg pull -u
nashorn: cd nashorn && hg pull -u
.: pulling from http://hg.openjdk.java.net/jdk9/jdk9
corba: pulling from http://hg.openjdk.java.net/jdk9/jdk9/corba
jaxp: pulling from http://hg.openjdk.java.net/jdk9/jdk9/jaxp
jaxws: pulling from http://hg.openjdk.java.net/jdk9/jdk9/jaxws
jdk: pulling from http://hg.openjdk.java.net/jdk9/jdk9/jdk
hotspot: pulling from http://hg.openjdk.java.net/jdk9/jdk9/hotspot
langtools: pulling from http://hg.openjdk.java.net/jdk9/jdk9/langtools
nashorn: pulling from http://hg.openjdk.java.net/jdk9/jdk9/nashorn
.: searching for changes
.: no changes found
corba: searching for changes
corba: no changes found
jaxp: searching for changes
jaxp: no changes found
jdk: searching for changes
jdk: no changes found
nashorn: searching for changes
nashorn: no changes found
jaxws: searching for changes
jaxws: no changes found
hotspot: searching for changes
hotspot: no changes found
langtools: searching for changes
langtools: no changes found
如果下载JDK8u而不是JDK9，自行替换上述终端命令即可。