add a function to install pandoc

_unittests/ut_custom_install/test_pandoc.py

@@ -0,0 +1,42 @@
+"""
+@brief      test log(time=20s)
+"""
+
+import sys, os, unittest
+
+try :
+    import src
+except ImportError :
+    path = os.path.normpath(os.path.abspath( os.path.join( os.path.split(__file__)[0], "..", "..")))
+    if path not in sys.path : sys.path.append (path)
+    import src
+
+try :
+    import pyquickhelper
+except ImportError :
+    path = os.path.normpath(os.path.abspath( os.path.join( os.path.split(__file__)[0], "..", "..", "..","pyquickhelper", "src")))
+    if path not in sys.path : sys.path.append (path)
+    import pyquickhelper
+
+
+from src.pymyinstall.installhelper.install_custom import install_pandoc
+from pyquickhelper import fLOG
+
+class TestPandoc (unittest.TestCase):
+
+    def test_pandoc(self) :
+        fLOG (__file__, self._testMethodName, OutputPrint = __name__ == "__main__")
+        fold = os.path.abspath(os.path.split(__file__)[0])
+        temp = os.path.join(fold,"temp_pandoc")
+        if not os.path.exists(temp) : os.mkdir(temp)
+        for _ in os.listdir(temp):
+            if ".msi" in _ :
+                os.remove(os.path.join(temp,_))
+        r = install_pandoc (temp_folder = temp, fLOG = fLOG, install = False)
+        assert os.path.exists(r)
+
+
+
+
+if __name__ == "__main__"  :
+    unittest.main ()    

src/pymyinstall/installhelper/install_custom.py

@@ -0,0 +1,83 @@
+# coding: latin-1
+"""
+@file
+@brief Various function to install some application such as `pandoc <http://johnmacfarlane.net/pandoc/>`_.
+"""
+import sys, re, platform, os, urllib, urllib.request, imp, zipfile,time, subprocess
+
+from .install_cmd import run_cmd
+
+def download_page(url):
+    """
+    download a page from a url
+    
+    @param      url     url
+    @return             content
+    """
+    try :
+        req = urllib.request.Request(url, headers= { 'User-agent': 'Mozilla/5.0' })
+        u = urllib.request.urlopen(req)
+        text = u.read()
+        u.close()
+    except urllib.error.HTTPError as e :
+        raise Exception("unable to get archive from: " + zipurl) from e
+
+    return str(text, encoding="utf8")
+
+def download_file(url, outfile):
+    """
+    download a file from a url, the function does not download the file
+    again if outfile already exists
+    
+    @param      url     url
+    @param      outfile outfile
+    @return             outfile
+    """
+    if os.path.exists(outfile):
+        return outfile
+
+    try :
+        req = urllib.request.Request(url, headers= { 'User-agent': 'Mozilla/5.0' })
+        u = urllib.request.urlopen(req)
+        text = u.read()
+        u.close()
+    except urllib.error.HTTPError as e :
+        raise Exception("unable to get archive from: " + url) from e
+
+    with open(outfile,"wb") as f :
+        f.write(text)
+
+    return outfile
+
+def install_pandoc(temp_folder=".", fLOG = print, install = True):
+    """
+    install `pandoc <http://johnmacfarlane.net/pandoc/>`_
+    
+    @param      temp_folder     where to download the setup
+    @param      fLOG            logging function
+    @param      install         install (otherwise only download)
+    @return                     temporary file
+    """
+    link  = "https://github.com/jgm/pandoc/releases/latest"
+    page = download_page(link)
+    if sys.platform.startswith("win"):
+        reg = re.compile("href=\\\"(.*?[.]msi)\\\"") 
+        all = reg.findall(page)
+        if len(all) == 0 :
+            raise Exception("unable to find a link on a .msi file on page: " + url)
+
+        file = all[0].split("/")[-1]
+        filel = "https://github.com/jgm/pandoc/releases/download/{0}/pandoc-{1}-windows.msi"
+        version = file.replace("pandoc-","").replace("-windows.msi","")
+        fLOG("pandoc, version ", version)
+        vershort = version.split("-")[0]
+        full = filel.format(vershort, version)
+        outfile = os.path.join( temp_folder, full.split("/")[-1])
+        fLOG("download ", full)
+        local = download_file(full, outfile)
+        if install :
+            run_cmd("msiexec /i " + local,fLOG=fLOG,wait=True)
+        return local
+    else:
+        raise NotImplementedError("not available on platform " + sys.platform)
+