[PATCH v3 2/2] http: add environment variable for HTTPS proxy.

["Jorge Lopez Silva via GitGitGadget" <gitgitgadget@gmail.com>]

From: Jorge Lopez Silva <jalopezsilva@gmail.com>

This commit adds four environment variables that can be used to
configure the proxy cert, proxy ssl key, the proxy cert password
protected flag, and the CA info for the proxy.

Documentation for the options was also updated.

Signed-off-by: Jorge Lopez Silva <jalopezsilva@gmail.com>
---
 Documentation/config/http.txt | 12 ++++++++----
 http.c                        |  7 +++++++
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/Documentation/config/http.txt b/Documentation/config/http.txt
index 7d398f9afba..3968fbb697a 100644
--- a/Documentation/config/http.txt
+++ b/Documentation/config/http.txt
@@ -31,20 +31,24 @@ http.proxyAuthMethod::
 
 http.proxySSLCert::
 	The pathname of a file that stores a client certificate to use to authenticate
-	with an HTTPS proxy.
+	with an HTTPS proxy. Can be overridden by the `GIT_PROXY_SSL_CERT` environment
+	variable.
 
 http.proxySSLKey::
 	The pathname of a file that stores a private key to use to authenticate with
-	an HTTPS proxy.
+	an HTTPS proxy. Can be overridden by the `GIT_PROXY_SSL_KEY` environment
+	variable.
 
 http.proxySSLCertPasswordProtected::
 	Enable Git's password prompt for the proxy SSL certificate.  Otherwise OpenSSL
 	will prompt the user, possibly many times, if the certificate or private key
-	is encrypted.
+	is encrypted. Can be overriden by the `GIT_PROXY_SSL_CERT_PASSWORD_PROTECTED`
+	environment variable.
 
 http.proxySSLCAInfo::
 	Pathname to the file containing the certificate bundle that should be used to
-	verify the proxy with when using an HTTPS proxy.
+	verify the proxy with when using an HTTPS proxy. Can be overriden by the
+	`GIT_PROXY_SSL_CAINFO` environment variable.
 
 http.emptyAuth::
 	Attempt authentication without seeking a username or password.  This
diff --git a/http.c b/http.c
index 8d616b5d60e..4283be9479b 100644
--- a/http.c
+++ b/http.c
@@ -1211,6 +1211,13 @@ void http_init(struct remote *remote, const char *url, int proactive_auth)
 		max_requests = DEFAULT_MAX_REQUESTS;
 #endif
 
+	set_from_env(&http_proxy_ssl_cert, "GIT_PROXY_SSL_CERT");
+	set_from_env(&http_proxy_ssl_key, "GIT_PROXY_SSL_KEY");
+	set_from_env(&http_proxy_ssl_ca_info, "GIT_PROXY_SSL_CAINFO");
+
+	if (getenv("GIT_PROXY_SSL_CERT_PASSWORD_PROTECTED"))
+		proxy_ssl_cert_password_required = 1;
+
 	if (getenv("GIT_CURL_FTP_NO_EPSV"))
 		curl_ftp_no_epsv = 1;
 
-- 
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